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Zare Shahraki M, Fathi P, Ebrahimi Dorche E, Flotemersch J, Blocksom K, Stribling J, Bruder A. Environmental impact assessment and conservation planning of a Middle-Eastern River basin using a fish-based tolerance index. RIVER RESEARCH AND APPLICATIONS 2024; 40:411-424. [PMID: 39027114 PMCID: PMC11252907 DOI: 10.1002/rra.4233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 12/03/2023] [Indexed: 07/20/2024]
Abstract
The tolerance of aquatic organisms to stressors is widely used to monitor and evaluate the condition of freshwater ecosystems. Tolerance values (TV) derived from analyses of the relationship between species and their environment are considered to be more objective than those that rely on expert opinion. We used principal component analysis (PCA) to derive a generalized stressor gradient based on physicochemical characteristics and physical habitat quality and structure. Scores of the first principal component axis (PC1) were used to estimate TV for 37 fish species collected from 54 sites in the Karun River basin, Iran. PCA of 17 variables identified stressors that were influential such as total phosphate, total nitrogen, total coliform, and habitat and morphological score. The species were separated into three categories on the stressor gradient: sensitive (18.9%), semi-tolerant (48.6%), and tolerant species (32.4%). Based on these results we developed the Karun Fish Tolerance Index (KFTI) and demonstrated that it performed well in separating the least, moderate, and most disturbed sites in the study area. The discrimination efficiency of the KFTI was 82.5%, which makes it a robust management tool for the protection and conservation of streams and rivers in the Karun River watershed. TV developed here reflect objective characteristics of the sensitivity of fish species to the predominant stressors in the Karun and similar systems.
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Affiliation(s)
- Mojgan Zare Shahraki
- Department of Natural Resources, Isfahan University of Technology, Isfahan, Iran
- Institute of Microbiology, University of Applied Sciences and Arts of Southern Switzerland, Mendrisio, Switzerland
- FWBON, the Freshwater Biodiversity Observation Network of GEOBON, Montreal, Canada
| | - Pejman Fathi
- Department of Natural Resources, Isfahan University of Technology, Isfahan, Iran
- Institute of Microbiology, University of Applied Sciences and Arts of Southern Switzerland, Mendrisio, Switzerland
- FWBON, the Freshwater Biodiversity Observation Network of GEOBON, Montreal, Canada
| | - Eisa Ebrahimi Dorche
- Department of Natural Resources, Isfahan University of Technology, Isfahan, Iran
| | - Joseph Flotemersch
- U.S. Environmental Protection Agency, Office of Research and Development, Washington, DC, USA
| | - Karen Blocksom
- U.S. Environmental Protection Agency, Office of Research and Development, Corvallis, Oregon, USA
| | - James Stribling
- Center for Ecological Sciences, Tetra Tech Inc, Owings Mills, Maryland, USA
| | - Andreas Bruder
- Institute of Microbiology, University of Applied Sciences and Arts of Southern Switzerland, Mendrisio, Switzerland
- FWBON, the Freshwater Biodiversity Observation Network of GEOBON, Montreal, Canada
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Zheng W, Sun Y, Shu D, Fan L, Xu W, Xu J. Compressible polyaniline-coated sodium alginate-cattail fiber foam for efficient and salt-resistant solar steam generation. J Colloid Interface Sci 2023; 645:551-559. [PMID: 37163801 DOI: 10.1016/j.jcis.2023.04.182] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 04/19/2023] [Accepted: 04/30/2023] [Indexed: 05/12/2023]
Abstract
Solar steam generation has attracted widespread attention because of its ability to produce clean water through desalination and wastewater treatment without conventional energy consumption. In this work, a polyaniline (PANI)-coated sodium alginate (SA)/cattail fiber (CF) foam for photothermal evaporator is prepared via directional freezing and oxidative polymerization. The SA/CF foam displays desirable water pumping capability because of the lamellar sandwich structure interconnected by porous networks. More importantly, the directional porous network architecture ameliorates the mechanical and salt-resistant performances of the SA/CF foam. The as-prepared PANI@SA/CF foam shows inferior heat conductivity of 0.047 W m-1 K-1 and outstanding light absorption over 96% in solar window. A vapor evaporation rate of 2.04 kg m-2 h-1 under 1 sun illumination is achieved for the PANI@SA/CF evaporator. Furthermore, the PANI@SA/CF foam could be employed in solar-driven freshwater generation from seawater and wastewater with high ion and dye removal rates. The combination of water evaporation and cleaning capabilities of the PANI@SA/CF foam as photothermal materials provide a framework for the exploration of next-generation evaporators in seawater desalination and wastewater treatment applications.
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Affiliation(s)
- Wenfeng Zheng
- State Key Lab for Hubei New Textile Materials and Advanced Processing Technology, College of Materials Science & Engineering, College of Textile Science & Engineering, Wuhan Textile University, 430200 Wuhan, China
| | - Yan Sun
- State Key Lab for Hubei New Textile Materials and Advanced Processing Technology, College of Materials Science & Engineering, College of Textile Science & Engineering, Wuhan Textile University, 430200 Wuhan, China
| | - Dong Shu
- State Key Lab for Hubei New Textile Materials and Advanced Processing Technology, College of Materials Science & Engineering, College of Textile Science & Engineering, Wuhan Textile University, 430200 Wuhan, China
| | - Lingling Fan
- State Key Lab for Hubei New Textile Materials and Advanced Processing Technology, College of Materials Science & Engineering, College of Textile Science & Engineering, Wuhan Textile University, 430200 Wuhan, China.
| | - Weilin Xu
- State Key Lab for Hubei New Textile Materials and Advanced Processing Technology, College of Materials Science & Engineering, College of Textile Science & Engineering, Wuhan Textile University, 430200 Wuhan, China
| | - Jie Xu
- State Key Lab for Hubei New Textile Materials and Advanced Processing Technology, College of Materials Science & Engineering, College of Textile Science & Engineering, Wuhan Textile University, 430200 Wuhan, China.
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Colares LF, de Assis Montag LF, Dunck B. Habitat loss predicts the functional extinction of fish from Amazonian streams during the Anthropocene. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 838:156210. [PMID: 35618116 DOI: 10.1016/j.scitotenv.2022.156210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 05/15/2022] [Accepted: 05/20/2022] [Indexed: 06/15/2023]
Abstract
The evaluation of extinction risk has typically focused on individual species, although a shift to a focus on ecosystem functioning would appear to be an urgent priority for conservation planning, especially considering that a sixth mass extinction event has already begun. In the present study, we investigated how fish extinction driven by habitat loss may modify the functioning of freshwater Amazonian ecosystems. We sampled the fish and environmental conditions of 63 streams in the eastern Amazon and simulated extinction based on the vulnerability of the species to habitat loss, which is the principal threat to tropical biodiversity. The simulated extinction of vulnerable species led to a decrease in both the mean body size of the community and functional rarity and culminated in abrupt losses of ecosystem functions after 5% and 10% of extinction at local and regional scales. Our functional approach demonstrated the progressive loss of ecological functions in Amazon streams, which may collapse altogether following the extinction of functions related to protection against biological invasions, and associated alterations in nutrient cycling and water quality. We provide robust predictions on the modification of the ecosystem following the extinction of fish species, which is a major step toward the development of effective conservation measures that ensure the avoidance of the predicted processes, and help to prevent the loss of biodiversity and the potentially irreversible modifications to ecosystem functioning.
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Affiliation(s)
- Lucas Ferreira Colares
- Programa de Pós-Graduação em Biodiversidade Animal, Laboratório de Ecologia Teórica e Aplicada, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Av. Roraima, 1000 - Camobi, Santa Maria, RS 97105-900, Brazil; Programa de Pós-Graduação em Ecologia, Laboratório de Ecologia de Produtores, Instituto de Ciências Biológicas, Universidade Federal do Pará, Av. Perimetral, 2651 - Terra Firme, Belém, PA, 66077-530, Brazil; Laboratório de Ecologia e Conservação, Instituto de Ciências Biológicas, Universidade Federal do Pará, Av. Perimetral, 2651 - Terra Firme, Belém, PA 66077-530, Brazil.
| | - Luciano Fogaça de Assis Montag
- Laboratório de Ecologia e Conservação, Instituto de Ciências Biológicas, Universidade Federal do Pará, Av. Perimetral, 2651 - Terra Firme, Belém, PA 66077-530, Brazil
| | - Bárbara Dunck
- Programa de Pós-Graduação em Ecologia, Laboratório de Ecologia de Produtores, Instituto de Ciências Biológicas, Universidade Federal do Pará, Av. Perimetral, 2651 - Terra Firme, Belém, PA, 66077-530, Brazil; Universidade Federal Rural da Amazônia, Instituto Socioambiental e dos Recursos Hídricos, Avenida Perimetral, 660778-30 Belém, PA, Brazil
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Deprá GDC, Aguilera G, Faustino-Fuster DR, Katz AM, Azevedo-Santos VM. Redefinition of Heptapterus (Heptapteridae) and description of Heptapterus carmelitanorum, a new species from the upper Paraná River basin in Brazil. ZOOSYST EVOL 2022. [DOI: 10.3897/zse.98.89413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
A new diagnosis and a new classification of Heptapterus are provided and a new species, H. carmelitanorum, is described. Heptapterus is diagnosed by the following character combination: adipose fin confluent with the caudal fin; non-bifurcate caudal fin; anal-fin insertion posterior to vertical through adipose-fin insertion; 10–23 anal-fin rays; anal fin not confluent with caudal fin; and extremely elongate body, with a head length of 16.1–24.9%SL. Species included in Heptapterus are H. borodini, H. carmelitanorum, H. carnatus, H. exilis, H. hollandi, H. mandimbusu, H. mbya, H. mustelinus, H. ornaticeps, and H. qenqo. Some of the character states diagnosing H. carmelitanorum among its congeners are the anal-fin insertion less than one eye diameter posterior to a vertical through the adipose-fin insertion (vs. more than one eye diameter in all congeners); the isognathous mouth (vs. slightly to moderately retrognathous, except H. borodini); and the keel formed by ventral procurrent caudal-fin rays shallow, far from reaching anal-fin base (vs. keel formed by ventral procurrent caudal-fin rays deep, continuing almost to the anal-fin base, except in H. borodini and H. hollandi).
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Galindo BA, Costa ADA, Ferreira DG, Garcia TD, Frota A, Frantine-Silva W, Rauber RG, Nascimento RHC, Zanatta AS, Shibatta OA, Birindelli JLO. Ichthyofauna of the Água das Araras stream, Paranapanema River basin, upper Paraná River system, Southern Brazil. STUDIES ON NEOTROPICAL FAUNA AND ENVIRONMENT 2021. [DOI: 10.1080/01650521.2021.1967690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Bruno A. Galindo
- Grupo de Pesquisas em Ecologia, Recursos Naturais e Limnologia (GERCOL), Universidade Estadual do Norte do Paraná (UENP), Cornélio Procópio, Brazil
| | - Alexandro D. A. Costa
- Programa de Pós-Graduação em Ciências Biológicas, Departamento de Biologia Animal e Vegetal, Universidade Estadual de Londrina (UEL), Londrina, Brazil
| | - Dhiego G. Ferreira
- Grupo de Pesquisas em Ecologia, Recursos Naturais e Limnologia (GERCOL), Universidade Estadual do Norte do Paraná (UENP), Cornélio Procópio, Brazil
| | - Thiago D. Garcia
- Programa de Pós-Graduação em Ciências Biológicas, Departamento de Biologia Animal e Vegetal, Universidade Estadual de Londrina (UEL), Londrina, Brazil
| | - Augusto Frota
- Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, Centro de Ciências Biológicas, Departamento de Biologia, Universidade Estadual de Maringá (UEM), Maringá, Brazil
| | - Wilson Frantine-Silva
- Programa de Pós-Graduação em Recursos Naturais, Laboratório de Ciências Ambientais, Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Campos dos Goytacazes, Brazil
| | - Rafaela G. Rauber
- Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, Centro de Ciências Biológicas, Departamento de Biologia, Universidade Estadual de Maringá (UEM), Maringá, Brazil
| | - Raul H. C. Nascimento
- Programa de Pós-Graduação em Ciências Biológicas, Departamento de Biologia Animal e Vegetal, Universidade Estadual de Londrina (UEL), Londrina, Brazil
| | - Augusto S. Zanatta
- Grupo de Pesquisas em Ecologia, Recursos Naturais e Limnologia (GERCOL), Universidade Estadual do Norte do Paraná (UENP), Cornélio Procópio, Brazil
| | - Oscar A. Shibatta
- Programa de Pós-Graduação em Ciências Biológicas, Departamento de Biologia Animal e Vegetal, Universidade Estadual de Londrina (UEL), Londrina, Brazil
| | - José L. O. Birindelli
- Programa de Pós-Graduação em Ciências Biológicas, Departamento de Biologia Animal e Vegetal, Universidade Estadual de Londrina (UEL), Londrina, Brazil
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Ferreira FS, Solórzano JCJ, Súarez YR. Influence of urbanization on stream fish assemblages in three microbasins in the Upper Paraná River Basin. BRAZ J BIOL 2021; 83:e247384. [PMID: 34190764 DOI: 10.1590/1519-6984.247384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 03/17/2021] [Indexed: 11/21/2022] Open
Abstract
The colonization pattern of fish assemblages in streams is often studied in the context of environmental filters. On the other hand, when fish assemblages are subjected to anthropogenic effects, variables associated with environmental quality assume more importance. Therefore, this work evaluated the richness and composition of fish from streams sampled at different urbanization levels, aiming to determine any direct effects on the structure of fish assemblages. To accomplish this, samples were collected from 2003 to 2011 at 31 sites distributed among 3 microbasins in the Rio Ivinhema Basin, Alto Rio Paraná. Based on environmental variables, physicochemical of the water and analysis of the use and occupation of the soil, the microbasins were classified into different urbanization levels (low, medium and high). A total of 4,320 individuals were sampled, out of which 57 fish species were recorded. Sampled sites with medium urbanization level presented higher richness compared to sampled sites with high urbanization level which presented lower richness. Species richness in these sites was explained mainly by water temperature and water velocity. Results confirmed that urbanization does directly affect environmental integrity, which, in turn, can lead to the homogenization of stream assemblages.
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Affiliation(s)
- F S Ferreira
- Universidade Estadual de Mato Grosso do Sul - UEMS, Programa de Pós-graduação em Recursos Naturais - PGRN, Dourados, MS, Brasil
| | - J C J Solórzano
- Universidade Estadual de Mato Grosso do Sul - UEMS, Programa de Pós-graduação em Recursos Naturais - PGRN, Dourados, MS, Brasil
| | - Y R Súarez
- Universidade Estadual de Mato Grosso do Sul - UEMS, Programa de Pós-graduação em Recursos Naturais - PGRN, Dourados, MS, Brasil.,Universidade Estadual do Mato Grosso do Sul - UEMS, Centro de Estudos em Recursos Naturais - CERNA, Laboratório de Ecologia, Dourados, MS, Brasil
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Nakamura G, Vicentin W, Súarez YR. Taxonomic and phylogenetic beta diversity in headwater stream fish communities of the Paraná and Paraguai River basins. NEOTROPICAL ICHTHYOLOGY 2021. [DOI: 10.1590/1982-0224-2020-0126] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
ABSTRACT Patterns of species replacement and richness differences along environmental gradients or ecoregions shed light on different ecological and evolutionary mechanisms acting on community structure. Communities of aquatic ecosystems of different watersheds are supposed to host distinct species and lineages. Quantifying and understanding the degree to which these differences are affected by environmental and biogeographical factors remains an open question for these environments, particularly in the Neotropical region. We investigated patterns of taxonomic and phylogenetic composition of headwater streams of the Paraná and Paraguai River basins to understand how local and biogeographical factors affect the assembly of fish communities. We also quantified taxonomic and phylogenetic beta diversity by decomposing them into nestedness and turnover components. We found that local environmental factors are the main factors influencing the composition of stream fish communities. Whereas pH affected both taxonomic and phylogenetic turnover, water velocity was responsible for phylogenetic turnover and pH was the main driver of phylogenetic nestedness. Our results indicate an effect of local environmental factors in determining the structure of headwater stream fish communities through a combination of a species sorting mechanism (water velocity and pH) and phylogenetic habitat filtering (pH).
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Guimarães FV, Souza TMD, Rodrigues RR, Souza-Lima R. Composition and distribution of fishes from the Perequê-Açu river basin, Paraty, Rio de Janeiro, Southeastern Brazil. BIOTA NEOTROPICA 2021. [DOI: 10.1590/1676-0611-bn-2020-1096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Abstract The large number of less-known coastal drainages in the Atlantic Forest still represents an important gap in the knowledge of ichthyofauna. It is evaluated the taxonomic diversity, frequency and constancy of occurrence, and the distribution of species in the various segments of the Perequê-Açu river basin, state of Rio de Janeiro, Brazil. Twelve sampling campaigns resulted in 13,423 individuals, belonging to seven orders, 10 families, 21 genera, and 23 native species. Cyprinodontiformes and Siluriformes represented about 87.2% of the total abundance, mainly due to the contribution of Phalloceros anisophallos and Schizolecis guntheri, which account for 63.2% of the total sampled individuals. The analysis of constancy of occurrence reveals that 78.3% of the drainage species are residents, with approximately 93% of the residents of the Carrasquinho River sub-basin. The Sertões River sub-basin had the largest number of species in total: 18. The rarefaction curve did not reach an asymptote, although Chao 2 and bootstrap estimate the richness of 23.9 species and 23.7 species, respectively. The results of PERMANOVA, PCoA, and SIMPER indicate that the fish composition along the catchment is not homogeneous. The conservation status of species is also discussed, regionally, nationally, and globally.
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Alvarenga LRP, Pompeu PS, Leal CG, Hughes RM, Fagundes DC, Leitão RP. Land-use changes affect the functional structure of stream fish assemblages in the Brazilian Savanna. NEOTROPICAL ICHTHYOLOGY 2021. [DOI: 10.1590/1982-0224-2021-0035] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
Abstract
Abstract We investigated the mechanisms involved in the relationship between land-use changes and aquatic biodiversity, using stream fish assemblages of the Brazilian Savanna (i.e., Cerrado) as a study model. We tested the prediction that landscape degradation would decrease environmental heterogeneity and change predominant physical-habitat types, which in turn would decrease the functional diversity and alter the functional identity of fish assemblages. We sampled fish from 40 streams in the Upper Paraná River basin, and assessed catchment and instream conditions. We then conducted an ecomorphological analysis to functionally characterize all species (36) and quantify different facets of the functional structure of assemblages. We detected multiple pathways of the impacts from landscape changes on the fish assemblages. Catchment degradation reduced the stream-bed complexity and the heterogeneity of canopy shading, decreasing assemblage functional specialization and divergence. Landscape changes also reduced the water volume and the amount of large rocks in streams, resulting in decreased abundances of species with large bodies and with morphological traits that favor swimming in the water column. We conclude that land-use intensification caused significant changes in aquatic biodiversity in the Cerrado, reinforcing the need to pay special attention to this global hotspot.
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Affiliation(s)
- Ludmilla R. P. Alvarenga
- Universidade Federal de Minas Gerais (UFMG), Brazil; Universidade Federal de Minas Gerais, Brazil
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Azevedo-Santos VM, Arcifa MS, Brito MFG, Agostinho AA, Hughes RM, Vitule JR, Simberloff D, Olden JD, Pelicice FM. Negative impacts of mining on Neotropical freshwater fishes. NEOTROPICAL ICHTHYOLOGY 2021. [DOI: 10.1590/1982-0224-2021-0001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Abstract Mining activities have significantly affected the Neotropical freshwater ichthyofauna, the most diverse in the world. However, no study has systematized knowledge on the subject. In this review, we assembled information on the main impacts of mining of crude oil, gold, iron, copper, and bauxite on aquatic ecosystems, emphasizing Neotropical freshwater fishes. The information obtained shows that mining activities generate several different disturbances, mainly via input of crude oil, metals and other pollutants, erosion and siltation, deforestation, and road construction. Mining has resulted in direct and indirect losses of fish diversity in several Neotropical waterbodies. The negative impacts on the ichthyofauna may change the structure of communities, compromise entire food chains, and erode ecosystem services provided by freshwater fishes. Particularly noteworthy is that mining activities (legal and illegal) are widespread in the Neotropics, and often located within or near protected areas. Actions to prevent and mitigate impacts, such as inspection, monitoring, management, and restoration plans, have been cursory or absent. In addition, there is strong political pressure to expand mining; if – or when – this happens, it will increase the potential of the activity to further diminish the diversity of Neotropical freshwater fishes.
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Freitas PV, Montag LFA, Ilha P, Torres NR, Maia C, Deegan L, Nascimento AT, Silva KD. Local effects of deforestation on stream fish assemblages in the amazon-savannah transitional area. NEOTROPICAL ICHTHYOLOGY 2021. [DOI: 10.1590/1982-0224-2021-0098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Abstract The expansion of agriculture in the southeast Amazon-Savanah transitional area has greatly decreased forest cover and influenced stream structure and functioning. We assessed the effects of forest cover loss on the integrity of streams by assessing stream physical conditions and the taxonomic and functional diversity of fish assemblages in this transitional area. We hypothesize that low forest cover, especially adjacent to streams, results in poor physical conditions (e.g., warmer temperatures, less physical structure, etc.), which in turn will decrease the taxonomic and functional diversity of fish assemblages. We detected that loss of forest cover negatively affects natural stream conditions and reduces the functional diversity of fish assemblages, but we did not find a strong effect on taxonomic diversity. Ambush and stalking predators, diurnal surface pickers (groups that exhibit opportunistic life history strategies), grazers, pickers, and browsers (groups that exhibit equilibrium life history strategies) were the functional groups with the strongest relation to altered environments. These groups can explore different niches, both with natural characteristics or altered by human activities. Our results suggest that the preservation of riparian zones can minimize the loss of specialized fish species in assemblages of Amazon-Savannah stream systems.
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Affiliation(s)
- Pâmela V. Freitas
- Universidade Federal do Pará, Brazil; Instituto de Ciências Biológicas, Brazil
| | | | - Paulo Ilha
- Instituto de Pesquisa Ambiental da Amazônia, Brazil
| | - Naiara R. Torres
- Instituto de Ciências Biológicas, Brazil; Universidade Federal do Pará, Brazil
| | - Calebe Maia
- Universidade Federal do Pará, Brazil; Instituto de Ciências Biológicas, Brazil
| | | | | | - Karina Dias Silva
- Universidade Federal do Pará, Brazil; Universidade Federal do Pará, Brazil
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Borges PP, Dias MS, Carvalho FR, Casatti L, Pompeu PS, Cetra M, Tejerina-Garro FL, Súarez YR, Nabout JC, Teresa FB. Stream fish metacommunity organisation across a Neotropical ecoregion: The role of environment, anthropogenic impact and dispersal-based processes. PLoS One 2020; 15:e0233733. [PMID: 32453798 PMCID: PMC7250414 DOI: 10.1371/journal.pone.0233733] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Accepted: 05/11/2020] [Indexed: 11/19/2022] Open
Abstract
Understanding how assemblages are structured in space and the factors promoting their distributions is one of the main goals in Ecology, however, studies regarding the distribution of organisms at larger scales remain biased towards terrestrial groups. We attempt to understand if the structure of stream fish metacommunities across a Neotropical ecoregion (Upper Paraná-drainage area of 820,000 km2) are affected by environmental variables, describing natural environmental gradient, anthropogenic impacts and spatial predictors. For this, we obtained 586 sampling points of fish assemblages in the ecoregion and data on environmental and spatial predictors that potentially affect fish assemblages. We calculated the local beta diversity (Local Contribution to Beta Diversity, LCBD) and alpha diversity from the species list, to be used as response variables in the partial regression models, while the anthropogenic impacts, environmental gradient and spatial factors were used as predictors. We found a high total beta diversity for the ecoregion (0.41) where the greatest values for each site sampled were located at the edges of the ecoregion, while richer communities were found more centrally. All sets of predictors explained the LCBD and alpha diversity, but the most important was dispersal variables, followed by the natural environmental gradient and anthropogenic impact. However, we found an increase in the models' prediction power through the shared effect. Results suggest that environmental filters (i.e. environmental variables such as climate, hydrology and anthropogenic impact) and dispersal limitation together shape fish assemblages of the Upper Paraná ecoregion, showing the importance of using multiple sets of predictors to understand the processes structuring biodiversity distribution.
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Affiliation(s)
- Pedro Paulino Borges
- Laboratório de Biogeografia e Ecologia Aquática (Bioecol), Universidade Estadual de Goiás, Anápolis, Goiás, Brazil
| | - Murilo Sversut Dias
- Departamento de Ecologia, Universidade de Brasília, Distrito Federal, Brasília, Brazil
| | - Fernando Rogério Carvalho
- Laboratório de Ictiologia, Setor de Zoologia, Instituto de Biociências, Universidade Federal de Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
| | - Lilian Casatti
- Departamento de Zoologia e Botânica, UNESP, São José do Rio Preto, São Paulo, Brazil
| | - Paulo Santos Pompeu
- Laboratório de Ecologia e Conservação de Peixes, Universidade Federal de Lavras, Lavras, Minas Gerais, Brazil
| | - Mauricio Cetra
- Departamento de Ciências Ambientais (DCA), Universidade Federal de São Carlos, São Paulo, Brazil
| | - Francisco Leonardo Tejerina-Garro
- Centro de Biologia Aquática, Pontifícia Universidade Católica de Goiás, Goiânia, Goiás, Brazil
- Laboratório de Biodiversidade-PPSTMA, UniEVANGÉLICA, Anápolis, Goiás, Brazil
| | - Yzel Rondon Súarez
- Centro Integrado de Análise e Monitoramento Ambiental (CInAM), Universidade Estadual do Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
| | - João Carlos Nabout
- Laboratório de Biogeografia e Ecologia Aquática (Bioecol), Universidade Estadual de Goiás, Anápolis, Goiás, Brazil
| | - Fabrício Barreto Teresa
- Laboratório de Biogeografia e Ecologia Aquática (Bioecol), Universidade Estadual de Goiás, Anápolis, Goiás, Brazil
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Ono ER, Manoel PS, Melo ALU, Uieda VS. Effects of riparian vegetation removal on the functional feeding group structure of benthic macroinvertebrate assemblages. COMMUNITY ECOL 2020. [DOI: 10.1007/s42974-020-00014-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Barbosa AS, Pires MM, Schulz UH. Influence of Land-Use Classes on the Functional Structure of Fish Communities in Southern Brazilian Headwater Streams. ENVIRONMENTAL MANAGEMENT 2020; 65:618-629. [PMID: 32130463 DOI: 10.1007/s00267-020-01274-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 02/20/2020] [Indexed: 06/10/2023]
Abstract
Changes in landscape composition caused by conversion of natural habitats into human-altered ecosystems can directly influence the physical characteristics of stream networks. Such impacts can modify the functional structure of fish communities, although the exact consequences of anthropic land-use changes can be context-dependent. This study investigated the influence of different land-use classes on the functional structure of fish communities in 32 headwater streams from southern Brazil. Trait composition and indices of functional diversity of the fish community were related to four land-use classes: native forest vegetation, silviculture, agriculture, and urban areas. Streams surrounded by larger areas of native forest were characterized by the predominance of foraging specialist species like grazers. However, as native vegetation is replaced by agriculture and urban areas, specialist species are replaced by species with generalist diet like detritivores. In streams surrounded by larger areas of agriculture, functional richness and divergence increased, while functional evenness decreased. Most likely, these changes were induced by alterations in the water quality, indicated by increased electrical conductivity and water temperature in streams with more agriculture areas. In conclusion, the conservation of the native forest vegetation is essential to maintain habitat characteristics and ecological processes in streams and to avoid the loss of specialist species in fish communities.
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Affiliation(s)
- Amanda Saldanha Barbosa
- Laboratory of Fish Ecology, Universidade do Vale do Rio dos Sinos (UNISINOS), Av. Unisinos 950, São Leopoldo, RS, Brazil
| | - Mateus Marques Pires
- Laboratory of Ecology and Conservation of Aquatic Ecosystems, Universidade do Vale do Rio dos Sinos (UNISINOS), Av. Unisinos 950, São Leopoldo, RS, Brazil
| | - Uwe Horst Schulz
- Laboratory of Fish Ecology, Universidade do Vale do Rio dos Sinos (UNISINOS), Av. Unisinos 950, São Leopoldo, RS, Brazil.
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15
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16
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Vieira TB, Tejerina-Garro FL. Relationships Between Environmental Conditions And Fish Assemblages In Tropical Savanna Headwater Streams. Sci Rep 2020; 10:2174. [PMID: 32034267 PMCID: PMC7005862 DOI: 10.1038/s41598-020-59207-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Accepted: 01/27/2020] [Indexed: 11/30/2022] Open
Abstract
Riparian vegetation plays an important role in providing energy to small watercourses and maintaining ecological processes through organic matter input and together with hydrological and geomorphological watercourse characteristics influence on fish assemblages. The goal of this paper was partitioning and quantifying the influence of riparian zone (type of riverbank substrate, bank slope, type of riparian vegetation cover and percentage of riparian vegetation cover on the main channel), physical habitat (stream channel width and depth, type of substrate and aquatic habitat in channel, water velocity and organic matter), water quality (turbidity, temperature, conductivity, pH, dissolved oxygen and chlorophyll concentration) and spatial variables (linear distances between sampled points) on fish assemblages (richness and abundance per species) in headwater streams of the Upper Paraná River basin, Central Brazil. For this purpose, it was performed a variation partitioning analysis between riparian, physical habitat, water and spatial variables sets and a Redundancy Analysis to quantify the influence of variables on the fish assemblages. Only the physical habitat and water quality variables influenced the fish assemblages (richness and abundance per species).
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Affiliation(s)
- Thiago Bernardi Vieira
- Laboratório de Ictiologia de Altamira - LIA, Universidade Federal do Pará (UFPA), Campus Altamira. Rua Coronel José Porfírio 2515, São Sebastião, Altamira, PA, CEP 68372-040, Brazil.
- Programa de Pós-Graduação em Biodiversidade e Conservação - PPGBC, Universidade Federal do Pará (UFPA), Campus Altamira. Rua Coronel José Porfírio 2515, São Sebastião, Altamira, PA, CEP 68372-040, Brazil.
| | - Francisco Leonardo Tejerina-Garro
- Laboratório de Biodiversidade, Programa de Mestrado em Sociedade, Tecnologia e Meio Ambiente, UniEVANGÉLICA, Av. Universitária km. 3,5, Cidade Universitária, Anápolis, GO, CEP 75083-515, Brazil
- Centro de Biologia Aquática, Escola de Ciências Agrárias e Biológicas, Pontifícia Universidade Católica de Goiás - Campus II, Av. Engler s/n, Jardim Mariliza, Goiânia, GO, CEP 74605-010, Brazil
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17
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Castro RMC, Polaz CNM. Small-sized fish: the largest and most threatened portion of the megadiverse neotropical freshwater fish fauna. BIOTA NEOTROPICA 2020. [DOI: 10.1590/1676-0611-bn-2018-0683] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract: We introduce the work providing a synthetic description of the diversity and phyletic structure of freshwater fish in the Neotropical Region, especially emphasizing that of Brazil. This is accompanied by a discussion about environments of fish from small to medium sized to large, taking into account how it shaped their respective biologies/ecologies, as well as what they imply for their use by humans. We present, as figures, the results of our exploratory analysis of Brazilian Red Book of Threatened Species of Fauna (2018), focusing on the small-sized ones, with up to 15 cm of standard length. We continue to present the main human impacts in small fish environments, along with those suffered by medium to large fish environments, and then follow by their respective deleterious effects. Finally, we present a general synthesis, reinforcing the enormous importance of small fish conservation and their respective preferred environments, followed by our main conclusions, and possible conservation strategies.
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18
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Peressin A, Casarim R, Prado IG, Cetra M. Physical habitat as predictor of fish trophic structure in Brazilian Atlantic rainforest streams. NEOTROPICAL ICHTHYOLOGY 2020. [DOI: 10.1590/1982-0224-2019-0076] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
ABSTRACT Trophic structure of fish assemblages is one of the most sensitive indicators of changes in streams environments. Since it is crucial to understand the response of trophic groups to habitat alteration, our study aimed to address this research gap by assessing the influence of substrate composition, meso-habitat variability, and bank stability, on the richness, biomass, and number of individuals of carnivores, invertivores, omnivores, and herbivorous-detritivores. Using an electrofishing device, we sampled 13 Atlantic rainforest streams reaches in a degradation gradient, located in the upper Paranapanema river basin. Sample points were ranked using a physical habitat index. More pristine streams had high availability of twigs, trunks, rocks and boulders in the substrate, great meso-habitat variability, and the presence of roots, trunks, and rocks in the margins. Canonical correlations between habitat characteristics and trophic groups explained more than 90% of data variability. Richness and number of individuals of invertivores increased in more preserved stream reaches, while richness of carnivores and number of individuals of omnivores decreased. These results demonstrate that trophic structure varies according to level of degradation, and that invertivore richness represents the best indicator of fish trophic structure responses to physical habitat alterations in streams.
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Affiliation(s)
- Alexandre Peressin
- Universidade Federal de Lavras, Brazil; Universidade Federal de Lavras, Brazil
| | | | - Ivo Gavião Prado
- Universidade Federal de Lavras, Brazil; Pisces - consultoria e serviços ambientais, Brazil
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de Sousa EL, Pereira NJ, Gomes JB, Dos Santos MM, Santos DMS. Ecotoxicological Analyses of Springs of a Brazilian Northeast Conservation Unit. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2020; 104:27-34. [PMID: 31792567 DOI: 10.1007/s00128-019-02757-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Accepted: 11/19/2019] [Indexed: 06/10/2023]
Abstract
Ecotoxicological assessment is an useful tool to evaluate toxicity of pollutants on aquatic organisms. In the present study, we evaluated the lethal effect, micronucleus frequency and histological changes in gills of fish species Danio rerio exposed to water from two sources of a Conservation Unit. We performed acute tests, Micronucleus Test in blood cells and histological analysis of gills. As results, the springs had no lethal toxic effects on the species. Nuclear alterations were present in erythrocytes in organisms exposed to water from the two sampled sites. As well, we found moderate to severe gill abnormalities generating the impairment of respiratory vital functions of these organisms. This study indicates that the water of the springs does not present lethal toxic effect but damage in gills for species from short exposure time.
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Affiliation(s)
- Elielma Lima de Sousa
- Postgraduate Program in Agricultural Microbiology, State University of Sao Paulo (Unesp), Access Way Prof. Paulo Donato Castellane, s/n, Jaboticabal, São Paulo, Brazil
| | - Natália Jovita Pereira
- Postgraduate Program in Aquatic Resources and Fisheries, State University of Maranhão (Uema), University City Paulo VI s/n, Cidade Operária, São Luís, Maranhão, Brazil
| | - Janderson Bruzaca Gomes
- Postgraduate Program in Aquatic Resources and Fisheries, State University of Maranhão (Uema), University City Paulo VI s/n, Cidade Operária, São Luís, Maranhão, Brazil
| | - Margareth Marques Dos Santos
- Graduated in Biology, State University of Maranhão (Uema), University City Paulo VI s/n, Cidade Operária, São Luís, Maranhão, Brazil
| | - Débora Martins Silva Santos
- Postgraduate Program in Aquatic Resources and Fisheries, Department of Chemistry and Biology, State University of Maranhão (Uema), University City Paulo VI s/n, Cidade Operária, São Luís, Maranhão, Brazil.
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20
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Gonçalves CDS, Holt RD, Christman MC, Casatti L. Environmental and spatial effects on coastal stream fishes in the Atlantic rain forest. Biotropica 2019. [DOI: 10.1111/btp.12746] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Cristina da Silva Gonçalves
- Laboratório de Ictiologia Departamento de Zoologia e Botânica Universidade Estadual Paulista "Júlio de Mesquita Filho" São José do Rio Preto SP Brasil
| | - Robert Dan Holt
- Arthur R. Marshall Jr. Ecological Sciences Laboratory Department of Biology University of Florida Gainesville FL USA
| | - Mary C. Christman
- Arthur R. Marshall Jr. Ecological Sciences Laboratory Department of Biology University of Florida Gainesville FL USA
| | - Lilian Casatti
- Laboratório de Ictiologia Departamento de Zoologia e Botânica Universidade Estadual Paulista "Júlio de Mesquita Filho" São José do Rio Preto SP Brasil
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Lo M, Narulita S, Ickowitz A. The relationship between forests and freshwater fish consumption in rural Nigeria. PLoS One 2019; 14:e0218038. [PMID: 31185056 PMCID: PMC6559641 DOI: 10.1371/journal.pone.0218038] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2019] [Accepted: 05/23/2019] [Indexed: 01/11/2023] Open
Abstract
Nigerians depend on fish for maintaining diverse and healthy diets. Fish are a key source of protein and micronutrients, both of which are important for healthy diets. Some research has shown that forests provide important ecosystem functions that support the productive capacity and sustainability of inland fisheries. Our study aims to empirically assess the relationship between forest cover around rivers and fish consumption. We use data from the Living Standards Measurement Survey (LSMS) and spatially merge household and village data with forest cover and river maps. We estimate the relationship between forest cover around rivers and average village fresh fish consumption, while also accounting for other socio-economic and geographical determinants. We find that that the density of forest cover around rivers is positively and significantly correlated with village consumption of fresh fish. Our results suggest that forests influence the consumption of fresh fish by improving the productivity of inland fisheries and increasing the availability of fish. Aquatic habitats tend to be overlooked in debates on land use and food production, and yet can be critically important sources of nutrient-rich foods that are limited in rural diets in developing countries, particularly for the poor. Clearing forests for agriculture in order to produce more agricultural crops might have the unintended consequence of reducing another important food source.
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Affiliation(s)
- Michaela Lo
- Center for International Forestry Research (CIFOR), Bogor, Indonesia
- * E-mail:
| | - Sari Narulita
- Center for International Forestry Research (CIFOR), Bogor, Indonesia
| | - Amy Ickowitz
- Center for International Forestry Research (CIFOR), Bogor, Indonesia
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22
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Gonino GMR, Figueiredo BRS, Manetta GI, Zaia Alves GH, Benedito E. Fire increases the productivity of sugarcane, but it also generates ashes that negatively affect native fish species in aquatic systems. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 664:215-221. [PMID: 30743114 DOI: 10.1016/j.scitotenv.2019.02.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 01/15/2019] [Accepted: 02/01/2019] [Indexed: 06/09/2023]
Abstract
Sugarcane is one of the main crops used around the world as a feedstock for the production of sucrose and biofuel. Prior to harvesting, sugarcane dry leaves are burned to facilitate manual cutting and enhance productivity. This practice generates ashes from sugarcane straw (hereafter referred as SCA), which may be carried to aquatic ecosystems, where its impacts on organisms and ecosystem integrity remain unknown. Here, we experimentally tested the toxicity of five different concentrations of SCA (0, 1000, 1500, 2000 and 2500 mg/L) on three native (Astyanax lacustris, Moenkhausia bonita and M. forestii) and two non-native (Oreochromis niloticus and Poecilia reticulata) fish from the Paraná River Basin, Brazil. The toxicity was estimated by calculating the median lethal concentration (LC50-24h) and the hepatosomatic index (HSI). We hypothesised that native fish are more sensitive to an increase in SCA than non-native fish. We verified that the mortality of native fish sharply increased with the increase in higher SCA concentration (LC50-24h values: A. lacustris = 2525.71 mg/L, M. bonita = 2124.95 mg/L and M. forestii = 1981.74 mg/L). However, no deaths were recorded for non-native fish species in any SCA concentrations. Accordingly, the HSI index values statistically differed with the increase in SCA concentrations for native fish, while for non-native fish we did not observe any difference. Therefore, only native species died or suffered liver damage with an increase in SCA concentrations. Extrapolating our findings to natural environments, we suggest that sugarcane burning, a widely used agricultural technique, has the potential to reduce the population size of native organisms and facilitate the dominance of non-native fish species in aquatic ecosystems.
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Affiliation(s)
- Gabriel M R Gonino
- Instituto Federal Catarinense (IFC-Câmpus Ibirama), Ibirama, Santa Catarina, Brazil; Programa de Pós-Graduação em Biologia Comparada (PGB), Universidade Estadual de Maringá, Maringá, Paraná, Brazil.
| | - Bruno R S Figueiredo
- Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura (Nupelia), Universidade Estadual de Maringá, Maringá, Paraná, Brazil
| | - Gislaine I Manetta
- Programa de Pós-Graduação em Biologia Comparada (PGB), Universidade Estadual de Maringá, Maringá, Paraná, Brazil
| | - Gustavo H Zaia Alves
- Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura (Nupelia), Universidade Estadual de Maringá, Maringá, Paraná, Brazil
| | - Evanilde Benedito
- Programa de Pós-Graduação em Biologia Comparada (PGB), Universidade Estadual de Maringá, Maringá, Paraná, Brazil; Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura (Nupelia), Universidade Estadual de Maringá, Maringá, Paraná, Brazil
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Ilha P, Rosso S, Schiesari L. Effects of deforestation on headwater stream fish assemblages in the Upper Xingu River Basin, Southeastern Amazonia. NEOTROPICAL ICHTHYOLOGY 2019. [DOI: 10.1590/1982-0224-20180099] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
ABSTRACT The expansion of the Amazonian agricultural frontier represents the most extensive land cover change in the world, detrimentally affecting stream ecosystems which collectively harbor the greatest diversity of freshwater fish on the planet. Our goal was to test the hypotheses that deforestation affects the abundance, richness, and taxonomic structure of headwater stream fish assemblages in the Upper Xingu River Basin, in Southeastern Amazonia. Standardized sampling surveys in replicated first order streams demonstrated that deforestation strongly influences fish assemblage structure. Deforested stream reaches had twice the fish abundance than reference stream reaches in primary forests. These differences in assemblage structure were largely driven by increases in the abundance of a handful of species, as no influence of deforestation on species richness was observed. Stream canopy cover was the strongest predictor of assemblage structure, possibly by a combination of direct and indirect effects on the provision of forest detritus, food resources, channel morphology, and micro-climate regulation. Given the dynamic nature of change in land cover and use in the region, this article is an important contribution to the understanding of the effects of deforestation on Amazonian stream fish, and their conservation.
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Affiliation(s)
- Paulo Ilha
- Universidade de São Paulo, Brazil; Instituto de Pesquisa Ambiental da Amazônia, Brazil
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24
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Assessing Fish Species Tolerance in the Huntai River Basin, China: Biological Traits versus Weighted Averaging Approaches. WATER 2018. [DOI: 10.3390/w10121843] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Fish species tolerance used as a component of fish-index of biological integrity (F-IBI) can be problematic as it is usually classified using the historical data, data from literature or expert judgments. In this study, fish assemblages, water quality parameters and physical habitat factors from 206 sampling sites in the Huntai River Basin were analyzed to develop tolerance indicator values (TIVs) of fish based on a (Fb-TIVs) and the weighted averaging (WA) method (FW-TIVs). The two quantitative methods for fish tolerance were then compared. The FW-TIVs and Fb-TIVs of fish species were calculated separately using a WA inference model based on ten water quality parameters (WT, pH, DO, SC, TDS, NH3, NO2−, NO3−, TP, Cl−, and SO42−), and six biological traits (lithophilic spawning, benthic invertivores, cold water species, equilibrium or periodic life history strategies, families of Cottidae, and species distribution range). Fish species were then classified into biological traits approach three categories (tolerant species, moderately tolerant species, and sensitive species). The results indicated that only 30.3% fish species have the same classification based on FW-TIVs and Fb-TIVs. However, the proportion of tolerant species based on two methods had a similar response to environmental stress, and these tolerant species were correlated with PCA axes 1 site scores obtained by (FW-TIVs, p < 0.05, R2 = 0.434; Fb-TIVs, p < 0.05, R2 = 0.334) and not correlated with PCA axis 2 site scores (FW-TIVs, p > 0.05, R2 = 0.001; Fb-TIVs, p > 0.05, R2 = 0.012) and PCA axis 3 site scores (FW-TIVs, p > 0.05, R2 = 0.000; Fb-TIVs, p > 0.05, R2 = 0.013). The results of linear regression analyses indicated that Fb-TIVs can be used for the study of fish tolerance. Fish tolerance assessments based on FW-TIVs requires long-term monitoring of fish assemblages and water quality parameters to provide sufficient data for quantitative studies. The Fb-TIV method relies on the accurate identification of fish traits by an ichthyologist. The two methods used in this study can provide methodological references for quantitative studies of fish tolerance in other regions, and are of great significance for the development of biological assessment tools.
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Mise FT, Message HJ, Pagotto JPA, Goulart E. Environmental assessment in tropical streams by using abundance-biomass curves and W index in fish assemblages. IHERINGIA. SERIE ZOOLOGIA 2018. [DOI: 10.1590/1678-4766e2018029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
ABSTRACT We investigated the fish fauna response to different environmental conditions of urban (three) and rural (seven) streams through biomass/abundance curves and W index of environmental stress. Negative values of W indicate some level of stress, while positive values suggest environments with lower stress. Dissolved oxygen, marginal erosion (both left and right margins), mesohabitat diversity, and percentage of canopy cover were measured to characterize the 10 streams analysed around Maringá city, Southern Brazil. Fish were sampled by electrofishing, then identified and weighed. Results showed negative values of W to the urban streams and positive to the rural. Urban streams showed a tendency to have assemblages of fish with lower biomass and greater abundance (r-strategists).
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26
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Ilha P, Schiesari L, Yanagawa FI, Jankowski K, Navas CA. Deforestation and stream warming affect body size of Amazonian fishes. PLoS One 2018; 13:e0196560. [PMID: 29718960 PMCID: PMC5931656 DOI: 10.1371/journal.pone.0196560] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Accepted: 04/16/2018] [Indexed: 12/12/2022] Open
Abstract
Declining body size has been suggested to be a universal response of organisms to rising temperatures, manifesting at all levels of organization and in a broad range of taxa. However, no study to date evaluated whether deforestation-driven warming could trigger a similar response. We studied changes in fish body size, from individuals to assemblages, in streams in Southeastern Amazonia. We first conducted sampling surveys to validate the assumption that deforestation promoted stream warming, and to test the hypothesis that warmer deforested streams had reduced fish body sizes relative to cooler forest streams. As predicted, deforested streams were up to 6 °C warmer and had fish 36% smaller than forest streams on average. This body size reduction could be largely explained by the responses of the four most common species, which were 43–55% smaller in deforested streams. We then conducted a laboratory experiment to test the hypothesis that stream warming as measured in the field was sufficient to cause a growth reduction in the dominant fish species in the region. Fish reared at forest stream temperatures gained mass, whereas those reared at deforested stream temperatures lost mass. Our results suggest that deforestation-driven stream warming is likely to be a relevant factor promoting observed body size reductions, although other changes in stream conditions, like reductions in organic matter inputs, can also be important. A broad scale reduction in fish body size due to warming may be occurring in streams throughout the Amazonian Arc of Deforestation, with potential implications for the conservation of Amazonian fish biodiversity and food supply for people around the Basin.
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Affiliation(s)
- Paulo Ilha
- Departamento de Ecologia, Instituto de Biociências, Universidade de São Paulo, São Paulo, São Paulo, Brazil
- * E-mail:
| | - Luis Schiesari
- Departamento de Ecologia, Instituto de Biociências, Universidade de São Paulo, São Paulo, São Paulo, Brazil
- Gestão Ambiental, Escola de Artes, Ciências e Humanidades, Universidade de São Paulo, São Paulo, São Paulo, Brazil
| | - Fernando I. Yanagawa
- Gestão Ambiental, Escola de Artes, Ciências e Humanidades, Universidade de São Paulo, São Paulo, São Paulo, Brazil
| | - KathiJo Jankowski
- US Geological Survey, Upper Midwest Environmental Sciences Center, La Crosse, Wisconsin, United States of America
| | - Carlos A. Navas
- Departamento de Fisiologia, Instituto de Biociências, Universidade de São Paulo, São Paulo, São Paulo, Brazil
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27
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Ichthyofauna diet changes in response to urbanization: the case of upper Paranapanema River basin (Brazil). Urban Ecosyst 2018. [DOI: 10.1007/s11252-018-0755-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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28
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Leitão RP, Zuanon J, Mouillot D, Leal CG, Hughes RM, Kaufmann PR, Villéger S, Pompeu PS, Kasper D, de Paula FR, Ferraz SFB, Gardner TA. Disentangling the pathways of land use impacts on the functional structure of fish assemblages in Amazon streams. ECOGRAPHY 2018; 41:219-232. [PMID: 29910537 PMCID: PMC5998685 DOI: 10.1111/ecog.02845] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 02/28/2017] [Indexed: 05/24/2023]
Abstract
Agricultural land use is a primary driver of environmental impacts on streams. However, the causal processes that shape these impacts operate through multiple pathways and at several spatial scales. This complexity undermines the development of more effective management approaches, and illustrates the need for more in-depth studies to assess the mechanisms that determine changes in stream biodiversity. Here we present results of the most comprehensive multi-scale assessment of the biological condition of streams in the Amazon to date, examining functional responses of fish assemblages to land use. We sampled fish assemblages from two large human-modified regions, and characterized stream conditions by physical habitat attributes and key landscape-change variables, including density of road crossings (i.e. riverscape fragmentation), deforestation, and agricultural intensification. Fish species were functionally characterized using ecomorphological traits describing feeding, locomotion, and habitat preferences, and these traits were used to derive indices that quantitatively describe the functional structure of the assemblages. Using structural equation modeling, we disentangled multiple drivers operating at different spatial scales, identifying causal pathways that significantly affect stream condition and the structure of the fish assemblages. Deforestation at catchment and riparian network scales altered the channel morphology and the stream bottom structure, changing the functional identity of assemblages. Local deforestation reduced the functional evenness of assemblages (i.e. increased dominance of specific trait combinations) mediated by expansion of aquatic vegetation cover. Riverscape fragmentation reduced functional richness, evenness and divergence, suggesting a trend toward functional homogenization and a reduced range of ecological niches within assemblages following the loss of regional connectivity. These results underscore the often-unrecognized importance of different land use changes, each of which can have marked effects on stream biodiversity. We draw on the relationships observed herein to suggest priorities for the improved management of stream systems in the multiple-use landscapes that predominate in human-modified tropical forests.
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Affiliation(s)
- Rafael P Leitão
- R. P. Leitão (http://orcid.org/0000-0001-7990-0068) , Depto de Biologia Geral, Univ. Federal de Minas Gerais, Belo Horizonte, Brazil. - J. Zuanon, D. Kasper and RPL, Coordenação de Biodiversidade, Inst. Nacional de Pesquisas da Amazônia, Manaus, Brazil. DK also at: Univ. Federal do Rio de Janeiro, Rio de Janeiro, Brazil. - D. Mouillot, S. Villéger and RPL, Laboratoire biodiversité marine et ses usages, UMR 9190 MARBEC CNRS-UM-IRD-IFREMER, Univ. de Montpellier, Montpellier, France. DM also at: Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook Univ., Townsville, QLD, Australia. - C. G. Leal and P. S. Pompeu, Depto de Biologia, Univ. Federal de Lavras, Lavras, Brazil. CGL also at: Lancaster Environment Centre, Lancaster Univ., Lancaster, UK, and Museu Paraense Emílio Goeldi, Belém, Brazil. - R. M. Hughes, Amnis Opes Inst. and Dept of Fisheries and Wildlife, Oregon State Univ., Corvallis, USA. - P. R. Kaufmann, Office of Research and Development, U.S. Environmental Protection Agency, Corvallis, USA. - Felipe R. de Paula and Silvio F. B. Ferraz, Laboratório de Hidrologia Florestal (LHF), ESALQ, Univ. de São Paulo, Piracicaba, Brazil. - T. A. Gardner, Stockholm Environment Inst., Stockholm, Sweden
| | - Jansen Zuanon
- R. P. Leitão (http://orcid.org/0000-0001-7990-0068) , Depto de Biologia Geral, Univ. Federal de Minas Gerais, Belo Horizonte, Brazil. - J. Zuanon, D. Kasper and RPL, Coordenação de Biodiversidade, Inst. Nacional de Pesquisas da Amazônia, Manaus, Brazil. DK also at: Univ. Federal do Rio de Janeiro, Rio de Janeiro, Brazil. - D. Mouillot, S. Villéger and RPL, Laboratoire biodiversité marine et ses usages, UMR 9190 MARBEC CNRS-UM-IRD-IFREMER, Univ. de Montpellier, Montpellier, France. DM also at: Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook Univ., Townsville, QLD, Australia. - C. G. Leal and P. S. Pompeu, Depto de Biologia, Univ. Federal de Lavras, Lavras, Brazil. CGL also at: Lancaster Environment Centre, Lancaster Univ., Lancaster, UK, and Museu Paraense Emílio Goeldi, Belém, Brazil. - R. M. Hughes, Amnis Opes Inst. and Dept of Fisheries and Wildlife, Oregon State Univ., Corvallis, USA. - P. R. Kaufmann, Office of Research and Development, U.S. Environmental Protection Agency, Corvallis, USA. - Felipe R. de Paula and Silvio F. B. Ferraz, Laboratório de Hidrologia Florestal (LHF), ESALQ, Univ. de São Paulo, Piracicaba, Brazil. - T. A. Gardner, Stockholm Environment Inst., Stockholm, Sweden
| | - David Mouillot
- R. P. Leitão (http://orcid.org/0000-0001-7990-0068) , Depto de Biologia Geral, Univ. Federal de Minas Gerais, Belo Horizonte, Brazil. - J. Zuanon, D. Kasper and RPL, Coordenação de Biodiversidade, Inst. Nacional de Pesquisas da Amazônia, Manaus, Brazil. DK also at: Univ. Federal do Rio de Janeiro, Rio de Janeiro, Brazil. - D. Mouillot, S. Villéger and RPL, Laboratoire biodiversité marine et ses usages, UMR 9190 MARBEC CNRS-UM-IRD-IFREMER, Univ. de Montpellier, Montpellier, France. DM also at: Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook Univ., Townsville, QLD, Australia. - C. G. Leal and P. S. Pompeu, Depto de Biologia, Univ. Federal de Lavras, Lavras, Brazil. CGL also at: Lancaster Environment Centre, Lancaster Univ., Lancaster, UK, and Museu Paraense Emílio Goeldi, Belém, Brazil. - R. M. Hughes, Amnis Opes Inst. and Dept of Fisheries and Wildlife, Oregon State Univ., Corvallis, USA. - P. R. Kaufmann, Office of Research and Development, U.S. Environmental Protection Agency, Corvallis, USA. - Felipe R. de Paula and Silvio F. B. Ferraz, Laboratório de Hidrologia Florestal (LHF), ESALQ, Univ. de São Paulo, Piracicaba, Brazil. - T. A. Gardner, Stockholm Environment Inst., Stockholm, Sweden
| | - Cecília G Leal
- R. P. Leitão (http://orcid.org/0000-0001-7990-0068) , Depto de Biologia Geral, Univ. Federal de Minas Gerais, Belo Horizonte, Brazil. - J. Zuanon, D. Kasper and RPL, Coordenação de Biodiversidade, Inst. Nacional de Pesquisas da Amazônia, Manaus, Brazil. DK also at: Univ. Federal do Rio de Janeiro, Rio de Janeiro, Brazil. - D. Mouillot, S. Villéger and RPL, Laboratoire biodiversité marine et ses usages, UMR 9190 MARBEC CNRS-UM-IRD-IFREMER, Univ. de Montpellier, Montpellier, France. DM also at: Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook Univ., Townsville, QLD, Australia. - C. G. Leal and P. S. Pompeu, Depto de Biologia, Univ. Federal de Lavras, Lavras, Brazil. CGL also at: Lancaster Environment Centre, Lancaster Univ., Lancaster, UK, and Museu Paraense Emílio Goeldi, Belém, Brazil. - R. M. Hughes, Amnis Opes Inst. and Dept of Fisheries and Wildlife, Oregon State Univ., Corvallis, USA. - P. R. Kaufmann, Office of Research and Development, U.S. Environmental Protection Agency, Corvallis, USA. - Felipe R. de Paula and Silvio F. B. Ferraz, Laboratório de Hidrologia Florestal (LHF), ESALQ, Univ. de São Paulo, Piracicaba, Brazil. - T. A. Gardner, Stockholm Environment Inst., Stockholm, Sweden
| | - Robert M Hughes
- R. P. Leitão (http://orcid.org/0000-0001-7990-0068) , Depto de Biologia Geral, Univ. Federal de Minas Gerais, Belo Horizonte, Brazil. - J. Zuanon, D. Kasper and RPL, Coordenação de Biodiversidade, Inst. Nacional de Pesquisas da Amazônia, Manaus, Brazil. DK also at: Univ. Federal do Rio de Janeiro, Rio de Janeiro, Brazil. - D. Mouillot, S. Villéger and RPL, Laboratoire biodiversité marine et ses usages, UMR 9190 MARBEC CNRS-UM-IRD-IFREMER, Univ. de Montpellier, Montpellier, France. DM also at: Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook Univ., Townsville, QLD, Australia. - C. G. Leal and P. S. Pompeu, Depto de Biologia, Univ. Federal de Lavras, Lavras, Brazil. CGL also at: Lancaster Environment Centre, Lancaster Univ., Lancaster, UK, and Museu Paraense Emílio Goeldi, Belém, Brazil. - R. M. Hughes, Amnis Opes Inst. and Dept of Fisheries and Wildlife, Oregon State Univ., Corvallis, USA. - P. R. Kaufmann, Office of Research and Development, U.S. Environmental Protection Agency, Corvallis, USA. - Felipe R. de Paula and Silvio F. B. Ferraz, Laboratório de Hidrologia Florestal (LHF), ESALQ, Univ. de São Paulo, Piracicaba, Brazil. - T. A. Gardner, Stockholm Environment Inst., Stockholm, Sweden
| | - Philip R Kaufmann
- R. P. Leitão (http://orcid.org/0000-0001-7990-0068) , Depto de Biologia Geral, Univ. Federal de Minas Gerais, Belo Horizonte, Brazil. - J. Zuanon, D. Kasper and RPL, Coordenação de Biodiversidade, Inst. Nacional de Pesquisas da Amazônia, Manaus, Brazil. DK also at: Univ. Federal do Rio de Janeiro, Rio de Janeiro, Brazil. - D. Mouillot, S. Villéger and RPL, Laboratoire biodiversité marine et ses usages, UMR 9190 MARBEC CNRS-UM-IRD-IFREMER, Univ. de Montpellier, Montpellier, France. DM also at: Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook Univ., Townsville, QLD, Australia. - C. G. Leal and P. S. Pompeu, Depto de Biologia, Univ. Federal de Lavras, Lavras, Brazil. CGL also at: Lancaster Environment Centre, Lancaster Univ., Lancaster, UK, and Museu Paraense Emílio Goeldi, Belém, Brazil. - R. M. Hughes, Amnis Opes Inst. and Dept of Fisheries and Wildlife, Oregon State Univ., Corvallis, USA. - P. R. Kaufmann, Office of Research and Development, U.S. Environmental Protection Agency, Corvallis, USA. - Felipe R. de Paula and Silvio F. B. Ferraz, Laboratório de Hidrologia Florestal (LHF), ESALQ, Univ. de São Paulo, Piracicaba, Brazil. - T. A. Gardner, Stockholm Environment Inst., Stockholm, Sweden
| | - Sébastien Villéger
- R. P. Leitão (http://orcid.org/0000-0001-7990-0068) , Depto de Biologia Geral, Univ. Federal de Minas Gerais, Belo Horizonte, Brazil. - J. Zuanon, D. Kasper and RPL, Coordenação de Biodiversidade, Inst. Nacional de Pesquisas da Amazônia, Manaus, Brazil. DK also at: Univ. Federal do Rio de Janeiro, Rio de Janeiro, Brazil. - D. Mouillot, S. Villéger and RPL, Laboratoire biodiversité marine et ses usages, UMR 9190 MARBEC CNRS-UM-IRD-IFREMER, Univ. de Montpellier, Montpellier, France. DM also at: Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook Univ., Townsville, QLD, Australia. - C. G. Leal and P. S. Pompeu, Depto de Biologia, Univ. Federal de Lavras, Lavras, Brazil. CGL also at: Lancaster Environment Centre, Lancaster Univ., Lancaster, UK, and Museu Paraense Emílio Goeldi, Belém, Brazil. - R. M. Hughes, Amnis Opes Inst. and Dept of Fisheries and Wildlife, Oregon State Univ., Corvallis, USA. - P. R. Kaufmann, Office of Research and Development, U.S. Environmental Protection Agency, Corvallis, USA. - Felipe R. de Paula and Silvio F. B. Ferraz, Laboratório de Hidrologia Florestal (LHF), ESALQ, Univ. de São Paulo, Piracicaba, Brazil. - T. A. Gardner, Stockholm Environment Inst., Stockholm, Sweden
| | - Paulo S Pompeu
- R. P. Leitão (http://orcid.org/0000-0001-7990-0068) , Depto de Biologia Geral, Univ. Federal de Minas Gerais, Belo Horizonte, Brazil. - J. Zuanon, D. Kasper and RPL, Coordenação de Biodiversidade, Inst. Nacional de Pesquisas da Amazônia, Manaus, Brazil. DK also at: Univ. Federal do Rio de Janeiro, Rio de Janeiro, Brazil. - D. Mouillot, S. Villéger and RPL, Laboratoire biodiversité marine et ses usages, UMR 9190 MARBEC CNRS-UM-IRD-IFREMER, Univ. de Montpellier, Montpellier, France. DM also at: Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook Univ., Townsville, QLD, Australia. - C. G. Leal and P. S. Pompeu, Depto de Biologia, Univ. Federal de Lavras, Lavras, Brazil. CGL also at: Lancaster Environment Centre, Lancaster Univ., Lancaster, UK, and Museu Paraense Emílio Goeldi, Belém, Brazil. - R. M. Hughes, Amnis Opes Inst. and Dept of Fisheries and Wildlife, Oregon State Univ., Corvallis, USA. - P. R. Kaufmann, Office of Research and Development, U.S. Environmental Protection Agency, Corvallis, USA. - Felipe R. de Paula and Silvio F. B. Ferraz, Laboratório de Hidrologia Florestal (LHF), ESALQ, Univ. de São Paulo, Piracicaba, Brazil. - T. A. Gardner, Stockholm Environment Inst., Stockholm, Sweden
| | - Daniele Kasper
- R. P. Leitão (http://orcid.org/0000-0001-7990-0068) , Depto de Biologia Geral, Univ. Federal de Minas Gerais, Belo Horizonte, Brazil. - J. Zuanon, D. Kasper and RPL, Coordenação de Biodiversidade, Inst. Nacional de Pesquisas da Amazônia, Manaus, Brazil. DK also at: Univ. Federal do Rio de Janeiro, Rio de Janeiro, Brazil. - D. Mouillot, S. Villéger and RPL, Laboratoire biodiversité marine et ses usages, UMR 9190 MARBEC CNRS-UM-IRD-IFREMER, Univ. de Montpellier, Montpellier, France. DM also at: Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook Univ., Townsville, QLD, Australia. - C. G. Leal and P. S. Pompeu, Depto de Biologia, Univ. Federal de Lavras, Lavras, Brazil. CGL also at: Lancaster Environment Centre, Lancaster Univ., Lancaster, UK, and Museu Paraense Emílio Goeldi, Belém, Brazil. - R. M. Hughes, Amnis Opes Inst. and Dept of Fisheries and Wildlife, Oregon State Univ., Corvallis, USA. - P. R. Kaufmann, Office of Research and Development, U.S. Environmental Protection Agency, Corvallis, USA. - Felipe R. de Paula and Silvio F. B. Ferraz, Laboratório de Hidrologia Florestal (LHF), ESALQ, Univ. de São Paulo, Piracicaba, Brazil. - T. A. Gardner, Stockholm Environment Inst., Stockholm, Sweden
| | - Felipe R de Paula
- R. P. Leitão (http://orcid.org/0000-0001-7990-0068) , Depto de Biologia Geral, Univ. Federal de Minas Gerais, Belo Horizonte, Brazil. - J. Zuanon, D. Kasper and RPL, Coordenação de Biodiversidade, Inst. Nacional de Pesquisas da Amazônia, Manaus, Brazil. DK also at: Univ. Federal do Rio de Janeiro, Rio de Janeiro, Brazil. - D. Mouillot, S. Villéger and RPL, Laboratoire biodiversité marine et ses usages, UMR 9190 MARBEC CNRS-UM-IRD-IFREMER, Univ. de Montpellier, Montpellier, France. DM also at: Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook Univ., Townsville, QLD, Australia. - C. G. Leal and P. S. Pompeu, Depto de Biologia, Univ. Federal de Lavras, Lavras, Brazil. CGL also at: Lancaster Environment Centre, Lancaster Univ., Lancaster, UK, and Museu Paraense Emílio Goeldi, Belém, Brazil. - R. M. Hughes, Amnis Opes Inst. and Dept of Fisheries and Wildlife, Oregon State Univ., Corvallis, USA. - P. R. Kaufmann, Office of Research and Development, U.S. Environmental Protection Agency, Corvallis, USA. - Felipe R. de Paula and Silvio F. B. Ferraz, Laboratório de Hidrologia Florestal (LHF), ESALQ, Univ. de São Paulo, Piracicaba, Brazil. - T. A. Gardner, Stockholm Environment Inst., Stockholm, Sweden
| | - Silvio F B Ferraz
- R. P. Leitão (http://orcid.org/0000-0001-7990-0068) , Depto de Biologia Geral, Univ. Federal de Minas Gerais, Belo Horizonte, Brazil. - J. Zuanon, D. Kasper and RPL, Coordenação de Biodiversidade, Inst. Nacional de Pesquisas da Amazônia, Manaus, Brazil. DK also at: Univ. Federal do Rio de Janeiro, Rio de Janeiro, Brazil. - D. Mouillot, S. Villéger and RPL, Laboratoire biodiversité marine et ses usages, UMR 9190 MARBEC CNRS-UM-IRD-IFREMER, Univ. de Montpellier, Montpellier, France. DM also at: Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook Univ., Townsville, QLD, Australia. - C. G. Leal and P. S. Pompeu, Depto de Biologia, Univ. Federal de Lavras, Lavras, Brazil. CGL also at: Lancaster Environment Centre, Lancaster Univ., Lancaster, UK, and Museu Paraense Emílio Goeldi, Belém, Brazil. - R. M. Hughes, Amnis Opes Inst. and Dept of Fisheries and Wildlife, Oregon State Univ., Corvallis, USA. - P. R. Kaufmann, Office of Research and Development, U.S. Environmental Protection Agency, Corvallis, USA. - Felipe R. de Paula and Silvio F. B. Ferraz, Laboratório de Hidrologia Florestal (LHF), ESALQ, Univ. de São Paulo, Piracicaba, Brazil. - T. A. Gardner, Stockholm Environment Inst., Stockholm, Sweden
| | - Toby A Gardner
- R. P. Leitão (http://orcid.org/0000-0001-7990-0068) , Depto de Biologia Geral, Univ. Federal de Minas Gerais, Belo Horizonte, Brazil. - J. Zuanon, D. Kasper and RPL, Coordenação de Biodiversidade, Inst. Nacional de Pesquisas da Amazônia, Manaus, Brazil. DK also at: Univ. Federal do Rio de Janeiro, Rio de Janeiro, Brazil. - D. Mouillot, S. Villéger and RPL, Laboratoire biodiversité marine et ses usages, UMR 9190 MARBEC CNRS-UM-IRD-IFREMER, Univ. de Montpellier, Montpellier, France. DM also at: Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook Univ., Townsville, QLD, Australia. - C. G. Leal and P. S. Pompeu, Depto de Biologia, Univ. Federal de Lavras, Lavras, Brazil. CGL also at: Lancaster Environment Centre, Lancaster Univ., Lancaster, UK, and Museu Paraense Emílio Goeldi, Belém, Brazil. - R. M. Hughes, Amnis Opes Inst. and Dept of Fisheries and Wildlife, Oregon State Univ., Corvallis, USA. - P. R. Kaufmann, Office of Research and Development, U.S. Environmental Protection Agency, Corvallis, USA. - Felipe R. de Paula and Silvio F. B. Ferraz, Laboratório de Hidrologia Florestal (LHF), ESALQ, Univ. de São Paulo, Piracicaba, Brazil. - T. A. Gardner, Stockholm Environment Inst., Stockholm, Sweden
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Sustainable Ecosystem Services Framework for Tropical Catchment Management: A Review. SUSTAINABILITY 2017. [DOI: 10.3390/su9040546] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Ríos-Pulgarín MI, Barletta M, Mancera-Rodríguez NJ. The role of the hydrological cycle on the distribution patterns of fish assemblages in an Andean stream. JOURNAL OF FISH BIOLOGY 2016; 89:102-130. [PMID: 26333196 DOI: 10.1111/jfb.12757] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2015] [Accepted: 06/23/2015] [Indexed: 06/05/2023]
Abstract
The seasonal and interannual changes of the fish assemblage in the main channel and littoral zone of the Guarinó River, a torrential system located in the Colombian Andean foothills, were examined in relation to the physical and chemical environmental changes associated with the hydrological cycle and the El Niño-La Niña-Southern Oscillation (ENSO) between 2007 and 2010. Four samplings per year (in dry season and high water) were performed. Environmental variables (temperature, pH, conductivity, turbidity, oxygen, total nitrogen, orthophosphate, depth and flow rate) were contrasted with ANOVAs and a discriminant analysis to establish temporal patterns. Biological descriptors (richness, density and biomass) were contrasted with ANCOVAs. The temporal patterns of the taxonomic and functional composition and the density of the fish assemblages were examined with respect to environmental variables through canonical discriminant analysis per habitat. Interannual differences were significant with regard to density and richness for the main channel habitat; while in the littoral zone, the differences were significant between both the year and seasons. Discriminant analysis showed variations in species composition and relative abundance between the main channel and the littoral zone under contrasting hydrological conditions of El Niño-La Niña. High flows from 2008 to 2009 (La Niña) favoured resident species (e.g. Creagrutus magdalenae) and small benthic Siluriformes (e.g. Chaetostoma spp.), but was limited to migratory species (e.g. Prochilodus magdalenae). From 2009 to 2010 (El Niño), the most common species were reduced and rare species increased. River flow, temperature and oxygen were the variables that had the largest influences on the seasonal and interannual differences in the fish assemblage structure of the Guarinó River. The results suggested that the presence and abundance of species and functional groups in different habitats were regulated by stochastic conditions, such as droughts, floods and drag events associated with the Southern Oscillation phenomenon (ENSO), acting as a hydrological disturbance on the habitats and generating different responses according to the adaptive characteristics of the species.
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Affiliation(s)
- M I Ríos-Pulgarín
- Group of Limnology and water resources, Limnology Laboratory, Environmental Management Unit, Universidad Católica de Oriente, Sector 3, Cra. 46 No. 40B 50, Rionegro, Antioquia, Colombia
- Universidad Nacional de Colombia, Sede Medellín, Department of Forestry Sciences, Research group Ecology and Wildlife Conservation, Calle 59A No. 63-20, Bloque 20, oficina 211, Medellín, Colombia
| | - M Barletta
- Group of Limnology and water resources, Limnology Laboratory, Environmental Management Unit, Universidad Católica de Oriente, Sector 3, Cra. 46 No. 40B 50, Rionegro, Antioquia, Colombia
- Laboratory of Ecology and Management of Estuarine and Aquatics Ecosystems, Department of Oceanography, Federal University of Pernambuco, 50740-550, Recife, Pernambuco, Brazil
| | - N J Mancera-Rodríguez
- Universidad Nacional de Colombia, Sede Medellín, Department of Forestry Sciences, Research group Ecology and Wildlife Conservation, Calle 59A No. 63-20, Bloque 20, oficina 211, Medellín, Colombia
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Ruaro R, Gubiani ÉA, Cunico AM, Moretto Y, Piana PA. Comparison of fish and macroinvertebrates as bioindicators of Neotropical streams. ENVIRONMENTAL MONITORING AND ASSESSMENT 2016; 188:45. [PMID: 26687088 DOI: 10.1007/s10661-015-5046-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Accepted: 12/10/2015] [Indexed: 06/05/2023]
Abstract
The biomonitoring of aquatic ecosystems in developing countries faces several limitations, especially related to gathering resources. The present study aimed at comparing the responses of fish and benthic macroinvertebrates to environmental change, to identify which group best indicates the differences between reference and impacted streams in southern Brazil. We determined reference and impacted sites based on physical and chemical variables of the water. For the analysis and comparison of biological responses, we calculated 22 metrics and submitted them to a discriminant analysis. We selected from this analysis only six metrics, which showed that the two studied assemblages respond differently to environmental change. A larger number of metrics were selected for macroinvertebrates than for fish in the separate analysis. The metrics selected for macroinvertebrates in the pooled analysis (i.e., fish and macroinvertebrates together) were different from those selected in the separate analysis for macroinvertebrates alone. However, the metrics selected for fish in the pooled analysis were the same selected in the separate analysis for fish alone. The macroinvertebrate assemblage was more effective for distinguishing reference from impacted sites. We suggest the use of macroinvertebrates as bioindicators of Neotropical streams, especially in situations in which time and money are short.
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Affiliation(s)
- Renata Ruaro
- Graduate Program in Conservation and Management of Natural Resources, Western Paraná State University, Rua Universitária, Bairro Universitário, 2069, Cascavel, Paraná, Brazil.
| | - Éder André Gubiani
- Graduate Program in Conservation and Management of Natural Resources, Western Paraná State University, Rua Universitária, Bairro Universitário, 2069, Cascavel, Paraná, Brazil
- Research Group in Fisheries and Limnology (Gerpel), Western Paraná State University, Rua da Faculdade 645, Toledo, Paraná, 85903-000, Brazil
| | - Almir Manoel Cunico
- Laboratory of Ecology, Fisheries and Ichthyology, Federal University of Parana, Rua Pioneiro, 2153, Palotina, Paraná, Brazil
- Graduate Program in Aquaculture and Sustainable Development, Federal University of Parana, Rua Pioneiro, 2153, Palotina, Paraná, Brazil
| | - Yara Moretto
- Laboratory of Ecology, Fisheries and Ichthyology, Federal University of Parana, Rua Pioneiro, 2153, Palotina, Paraná, Brazil
- Graduate Program in Aquaculture and Sustainable Development, Federal University of Parana, Rua Pioneiro, 2153, Palotina, Paraná, Brazil
| | - Pitágoras Augusto Piana
- Graduate Program in Conservation and Management of Natural Resources, Western Paraná State University, Rua Universitária, Bairro Universitário, 2069, Cascavel, Paraná, Brazil
- Research Group in Fisheries and Limnology (Gerpel), Western Paraná State University, Rua da Faculdade 645, Toledo, Paraná, 85903-000, Brazil
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Larentis C, Delariva RL, Gomes LC, Baumgartner D, Ramos IP, Sereia DADO. Ichthyofauna of streams from the lower Iguaçu River basin, Paraná State, Brazil. BIOTA NEOTROPICA 2016. [DOI: 10.1590/1676-0611-bn-2015-0117] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract The drainages of the Iguaçu River basin, as well as the main channel of the river, have peculiar characteristics resulting from geomorphological processes in this area, including the formation of the Iguaçu River Falls. This slope in the lower portion of the basin is a biogeographical barrier to many organisms. In this study was inventoried the fish fauna of streams of the lower Iguaçu River basin, evaluating possible differences in the species composition upstream and downstream of this biogeographical barrier. Sampling were conducted between 2004 and 2013, in five streams, three upstream and two downstream of the Iguaçu River Falls, using electrofishing. The nMDS analysis was run to investigate possible groupings of similar fauna between the streams sampled. The scores of this test were tested as to the significance of groupings with the Hotelling T2 test. The indicator value method (IndVal) was used to detect the distribution of species among the groups of the streams upstream and downstream of the Iguaçu River Falls. We collected 18,908 individuals of six orders, 11 families, and 40 species. Siluriformes and Characiformes had the highest species richness; Cyprinodontiformes presented the highest abundance. Considering the species recorded, 21 are considered natives to the Iguaçu River basin, including 15 endemic, wich were found only in streams upstream of the falls. Additional 18 species were verified only in the streams downstream of such barrier. Four species were common to both stretches. The axis 1 of the nMDS separated two groups: streams upstream (S1, S2 and S3) and streams downstream of the Iguaçu River Falls (S4 and S5). The indicator species analysis also indicated a distinction between the groups of streams, that were significantly different (Hotelling's T2 = 234.36, p ˂ 0.0001). The number of endemic species in the streams upstream of the Falls (15 spp.) evidences a significant effect of isolation promoted by the Iguaçu River Falls, and confirms the role of this barrier in the vicariant processes and endemism typical of this basin. These results emphasize the importance of conserving these ecosystems, once the extinction of species in this region means the irreversible loss of them.
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Giam X, Hadiaty RK, Tan HH, Parenti LR, Wowor D, Sauri S, Chong KY, Yeo DCJ, Wilcove DS. Mitigating the impact of oil-palm monoculture on freshwater fishes in Southeast Asia. CONSERVATION BIOLOGY : THE JOURNAL OF THE SOCIETY FOR CONSERVATION BIOLOGY 2015; 29:1357-1367. [PMID: 25800305 DOI: 10.1111/cobi.12483] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Accepted: 12/14/2014] [Indexed: 06/04/2023]
Abstract
Anthropogenic land-cover change is driving biodiversity loss worldwide. At the epicenter of this crisis lies Southeast Asia, where biodiversity-rich forests are being converted to oil-palm monocultures. As demand for palm oil increases, there is an urgent need to find strategies that maintain biodiversity in plantations. Previous studies found that retaining forest patches within plantations benefited some terrestrial taxa but not others. However, no study has focused on aquatic taxa such as fishes, despite their importance to human well-being. We assessed the efficacy of forested riparian reserves in conserving freshwater fish biodiversity in oil-palm monoculture by sampling stream fish communities in an oil-palm plantation in Central Kalimantan, Indonesia. Forested riparian reserves maintained preconversion local fish species richness and functional diversity. In contrast, local and total species richness, biomass, and functional diversity declined markedly in streams without riparian reserves. Mechanistically, riparian reserves appeared to increase local species richness by increasing leaf litter cover and maintaining coarse substrate. The loss of fishes specializing in leaf litter and coarse substrate decreased functional diversity and altered community composition in oil-palm plantation streams that lacked riparian reserves. Thus, a land-sharing strategy that incorporates the retention of forested riparian reserves may maintain the ecological integrity of fish communities in oil-palm plantations. We urge policy makers and growers to make retention of riparian reserves in oil-palm plantations standard practice, and we encourage palm-oil purchasers to source only palm oil from plantations that employ this practice.
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Affiliation(s)
- Xingli Giam
- Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ, 08544, U.S.A
- Lee Kong Chian Natural History Museum, National University of Singapore, S117546, Singapore
| | - Renny K Hadiaty
- Museum Zoologicum Bogoriense, Research Center for Biology, Indonesian Institute of Sciences, Cibinong, 16911, Indonesia
| | - Heok Hui Tan
- Lee Kong Chian Natural History Museum, National University of Singapore, S117546, Singapore
| | - Lynne R Parenti
- Division of Fishes, Department of Vertebrate Zoology, National Museum of Natural History, P.O. Box 37012, MRC 159, Smithsonian Institution, Washington, D.C., 20013, U.S.A
| | - Daisy Wowor
- Museum Zoologicum Bogoriense, Research Center for Biology, Indonesian Institute of Sciences, Cibinong, 16911, Indonesia
| | - Sopian Sauri
- Museum Zoologicum Bogoriense, Research Center for Biology, Indonesian Institute of Sciences, Cibinong, 16911, Indonesia
| | - Kwek Yan Chong
- Department of Biological Sciences, National University of Singapore, S117543, Singapore
| | - Darren C J Yeo
- Department of Biological Sciences, National University of Singapore, S117543, Singapore
| | - David S Wilcove
- Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ, 08544, U.S.A
- Woodrow Wilson School of Public and International Affairs, Princeton University, Princeton, NJ, 08544, U.S.A
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dos Santos FB, Esteves KE. A Fish-Based Index of Biotic Integrity for the Assessment of Streams Located in a Sugarcane-Dominated Landscape in Southeastern Brazil. ENVIRONMENTAL MANAGEMENT 2015; 56:532-548. [PMID: 25924789 DOI: 10.1007/s00267-015-0516-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Accepted: 04/15/2015] [Indexed: 06/04/2023]
Abstract
A multimetric, fish-based Index of Biotic Integrity (IBI) was developed and tested to assess the ecological status of streams with different riparian conditions in the Piracicaba River Basin. Nine streams with three categories of riparian zone preservation were selected: native forest (NF) with preserved forest, secondary forest (SF) with forest in an advanced state of regeneration and surrounded by sugarcane plantations, and sugarcane (SC) without riparian vegetation and surrounded by SC crops. A continuous scoring system was employed, and candidate metrics were tested for range, responsiveness, and redundancy, resulting in the selection of eight metrics to compose the index. The final IBI score was positively correlated with an Environmental Index both in the dry (Spearman's rho = 0.76; P = 0.01) and rainy seasons (Spearman's rho = 0.66; P = 0.04), suggesting that this IBI is a suitable tool for the assessment of the biological conditions of these streams. The highest IBI values were observed in the rainy season at the NF and SF sites, with significant differences between the NF and SC sites (Kruskal-Wallis test: P = 0.03). The results indicated some variability in the biological integrity at SF and SC sites, suggesting a relationship with the intensity of the management of this crop. Patterns were consistent with other studies that have shown the effects of agriculture on the environmental quality of streams, which indicate the importance of the riparian zone to the maintenance of ecosystem integrity and supports the use of the IBI for biological monitoring in similar regions.
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Affiliation(s)
- Fernanda Bastos dos Santos
- Postgraduate Course in Aquaculture and Fisheries, Fisheries Institute, Secretaria da Agricultura e Abastecimento do Estado de São Paulo, São Paulo, Brazil
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Teresa FB, Casatti L, Cianciaruso MV. Functional differentiation between fish assemblages from forested and deforested streams. NEOTROPICAL ICHTHYOLOGY 2015. [DOI: 10.1590/1982-0224-20130229] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We tested the hypothesis that streams in deforested areas shelter different fish communities to nearby forested areas, and that these disparities are due to environmental parameters that limit or benefit different species according to their functional traits. We compared the community composition of three south east Brazilian streams flanked by riparian forest with three nearby streams in deforested areas. The following functional traits were considered: diet, habitat use, water flow preference, size, and hypoxia tolerance. Differentiation between forested and deforested streams corresponded with the different contributions of three functional groups. Species reported in the literature to be hypoxia tolerant, and exhibiting a variable combination of the other traits prevailed in deforested streams, although we did not find substantial differences in oxygen levels between forested and deforested streams. In forested streams, benthic species associated with a high water flow and an insectivorous diet were dominant. Changes in streams induced by deforestation which are associated with habitat availability, food resources, and physicochemical conditions appear to restrict the occurrence of specialized species and instead benefit tolerant generalists.
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36
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Augusto FG, Tassoni Filho M, Ferreira A, Pereira AL, Camargo PBD, Martinelli LA. Land use change in the Atlantic Forest affects carbon and nitrogen sources of streams as revealed by the isotopic composition of terrestrial invertebrates. BIOTA NEOTROPICA 2015. [DOI: 10.1590/1676-06032015018814] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Terrestrial invertebrates link terrestrial systems to aquatic ones, making vegetal material produced in the watershed available to aquatic food webs. In this study, using carbon and nitrogen stable isotopes, we evaluated the importance of introduced C4 grasses as a source of carbon in aquatic food webs of headwater streams of the coastal Atlantic Forest located on the north coast of the State of São Paulo, in the southeastern region of Brazil. Terrestrial invertebrates were collected in two streams: one where the main land cover was pristine montane Atlantic Forest (forest stream) and another where the main land cover was introduced C4 forage grasses for livestock (pasture stream). The average δ13C of terrestrial invertebrates collected in the forest stream (−26.3±2.1‰) was significantly (p<0.01) smaller than the average δ13C of terrestrial invertebrates collected in the pasture stream (−15.7±4.7‰), denoting a larger contribution of C4grasses to terrestrial invertebrates of the pasture stream. The average δ15N of terrestrial invertebrates of the forest stream (4.1±2.4‰) was significantly (p<0.01) lower than the average δ15N of terrestrial invertebrates of the pasture stream (9.5±2.7‰). The relative contribution of C3 and C4 plants to terrestrial invertebrates was estimated using SIAR. In the forest stream, the C3 contribution was on average 0.75 (0.72 minimum to 0.79 maximum), and the C4 contribution was on average 0.25 (0.21 minimum to 0.28 maximum). In the pasture stream, the C3contribution decreased to 0.20 (0.14 minimum to 0.26 maximum), and the C4 contribution increased to 0.80 (0.74 minimum to 0.86 maximum). These results have several implications for the ecosystem functioning as well as for recent changes in environmental policies of Brazil. The lower nutritional value of C4 grasses may not only decrease invertebrate performance, but also alter the stoichiometry of several components of the aquatic food webs with potential consequence for the whole ecosystem functioning. On the public policy side, recent changes in the Brazilian Forest Act, a series of laws that regulate land cover at the property level, reduced the width of the forested riparian area with potentially dangerous consequences for aquatic ecosystems.
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37
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Rarity status of endemic and vulnerable fish species in a Brazilian Atlantic Forest protected area. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.ncon.2015.04.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Rivaes RP, Rodríguez-González PM, Ferreira MT, Pinheiro AN, Politti E, Egger G, García-Arias A, Francés F. Modeling the evolution of riparian woodlands facing climate change in three European rivers with contrasting flow regimes. PLoS One 2014; 9:e110200. [PMID: 25330151 PMCID: PMC4199630 DOI: 10.1371/journal.pone.0110200] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Accepted: 09/18/2014] [Indexed: 11/17/2022] Open
Abstract
Global circulation models forecasts indicate a future temperature and rainfall pattern modification worldwide. Such phenomena will become particularly evident in Europe where climate modifications could be more severe than the average change at the global level. As such, river flow regimes are expected to change, with resultant impacts on aquatic and riparian ecosystems. Riparian woodlands are among the most endangered ecosystems on earth and provide vital services to interconnected ecosystems and human societies. However, they have not been the object of many studies designed to spatially and temporally quantify how these ecosystems will react to climate change-induced flow regimes. Our goal was to assess the effects of climate-changed flow regimes on the existing riparian vegetation of three different European flow regimes. Cases studies were selected in the light of the most common watershed alimentation modes occurring across European regions, with the objective of appraising expected alterations in the riparian elements of fluvial systems due to climate change. Riparian vegetation modeling was performed using the CASiMiR-vegetation model, which bases its computation on the fluvial disturbance of the riparian patch mosaic. Modeling results show that riparian woodlands may undergo not only at least moderate changes for all flow regimes, but also some dramatic adjustments in specific areas of particular vegetation development stages. There are circumstances in which complete annihilation is feasible. Pluvial flow regimes, like the ones in southern European rivers, are those likely to experience more pronounced changes. Furthermore, regardless of the flow regime, younger and more water-dependent individuals are expected to be the most affected by climate change.
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Affiliation(s)
- Rui P Rivaes
- Forest Research Center, Instituto Superior de Agronomia, Universidade de Lisboa, Lisbon, Portugal
| | | | - Maria Teresa Ferreira
- Forest Research Center, Instituto Superior de Agronomia, Universidade de Lisboa, Lisbon, Portugal
| | - António N Pinheiro
- CEHIDRO, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - Emilio Politti
- Environmental Consulting Klagenfurt, Klagenfurt, Austria
| | - Gregory Egger
- Environmental Consulting Klagenfurt, Klagenfurt, Austria
| | - Alicia García-Arias
- Research Institute of Water and Environmental Engineering, Universitat Politècnica de València, Valencia, Spain
| | - Felix Francés
- Research Institute of Water and Environmental Engineering, Universitat Politècnica de València, Valencia, Spain
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39
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Leal CG, Junqueira NT, Alves CBM, Pompeu PS. Morphological Space Stability in Rivers under Different Disturbance Regimes. COPEIA 2014. [DOI: 10.1643/ce-12-096] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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40
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Daga VS, Gubiani ÉA, Cunico AM, Baumgartner G. Effects of abiotic variables on the distribution of fish assemblages in streams with different anthropogenic activities in southern Brazil. NEOTROPICAL ICHTHYOLOGY 2012. [DOI: 10.1590/s1679-62252012000300018] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Studies on fish assemblages in streams point out, that understanding the relationship between species and their environment is crucial for conservation. The present study aimed at evaluating the effects of changes in abiotic variables on the composition and structure of fish assemblages in Neotropical urban streams from southern Brazil with different levels of urbanization. The composition and structure of fish assemblages showed significant differences along the urbanization gradient observed in the streams. Tolerant and non-native species were found in more urbanized sites. A matrix correlation revealed a relationship between abiotic variables and the spatial pattern of structure and composition of fish assemblages. Abiotic variables, such as total phosphorus, dissolved oxygen, and conductivity, determined the distribution of fish assemblages. Streams without urban influence exhibited intrinsically low species richness, suggesting that they are highly susceptible to species loss and diversity reduction. Thus, changes in water quality or hydrological conditions induced by urbanization may intensify these impacts.
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Affiliation(s)
| | - Éder André Gubiani
- Universidade Estadual do Oeste do Paraná, Brazil; Universidade Estadual do Oeste do Paraná, Brazil
| | | | - Gilmar Baumgartner
- Universidade Estadual do Oeste do Paraná, Brazil; Universidade Estadual do Oeste do Paraná, Brazil
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