1
|
Martínez-Megías C, Rico A. Biodiversity impacts by multiple anthropogenic stressors in Mediterranean coastal wetlands. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 818:151712. [PMID: 34800444 DOI: 10.1016/j.scitotenv.2021.151712] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 10/01/2021] [Accepted: 11/12/2021] [Indexed: 06/13/2023]
Abstract
Mediterranean coastal wetlands are considered biodiversity hot-spots and contain a high number of endemic species. The biodiversity of these ecosystems is endangered by several pressures resulting from agricultural and urban expansion, climate change, and the alteration of their hydrological cycle. In this study we assess the state-of-the-art regarding the impact of several stressor groups on the biodiversity of Mediterranean coastal wetlands (i.e., lagoons, marshes, estuaries). Particularly, we describe the impacts of eutrophication, chemical pollution, invasive species, salinization, and temperature rise, and analyze the existing literature regarding the impact of multiple stressors on these ecosystems. Our study denotes a clear asymmetry both in terms of study areas and stressors evaluated. The majority of studies focus on lagoons and estuaries of the north-west parts of the Mediterranean basin, while the African and the Asian coast have been less represented. Eutrophication and chemical pollution were the most studied stressors compared to others like temperature rise or species invasions. Most studies evaluating these stressors individually show direct or indirect effects on the biodiversity of primary producers and invertebrate communities, and changes in species dominance patterns that contribute to a decline of endemic populations. The few available studies addressing stressor interactions have shown non-additive responses, which are important to define appropriate ecosystem management and restoration measures. Finally, we propose research needs to advance our understanding on the impacts of anthropogenic stressors on Mediterranean coastal wetlands and to guide future interventions to protect biodiversity.
Collapse
Affiliation(s)
- Claudia Martínez-Megías
- IMDEA Water Institute, Science and Technology Campus of the University of Alcalá, Avenida Punto Com 2, 28805 Alcalá de Henares, Madrid, Spain; University of Alcalá, Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Ctra. Madrid-Barcelona KM 33.600, 28871 Alcalá de Henares, Madrid, Spain
| | - Andreu Rico
- IMDEA Water Institute, Science and Technology Campus of the University of Alcalá, Avenida Punto Com 2, 28805 Alcalá de Henares, Madrid, Spain; Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, c/ Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain.
| |
Collapse
|
2
|
Cai Y, Liang J, Zhang P, Wang Q, Wu Y, Ding Y, Wang H, Fu C, Sun J. Review on strategies of close-to-natural wetland restoration and a brief case plan for a typical wetland in northern China. CHEMOSPHERE 2021; 285:131534. [PMID: 34329151 DOI: 10.1016/j.chemosphere.2021.131534] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Revised: 07/03/2021] [Accepted: 07/09/2021] [Indexed: 06/13/2023]
Abstract
Wetlands play an important role in sustaining ecosystems on the earth, which regulate water resources, adjust local climate and produce food for human beings, etc. However, wetlands are facing huge challenges due to human activities and other natural evolution, such as area shrinkage, function weakening and biodiversity decrease, and so on, therefore, some wetlands need to be urgently restored. In this study, the main technology components of close-to-natural restoration of wetlands were summarized. The ecological water requirement and water resource allocation can be optimized for the water balance between social, economy and ecology, which is a key prerequisite for maintaining wetland ecosystem. The pollution of wetland sediments and soils can be assessed by various indicators to provide the scientific basis for natural restoration of wetland base, and suitable strategies should be taken according to the actual conditions of wetland bases. The hydrological connectivity in wetlands and with related water system can be numerically simulated to make the optimal plan for improvement of hydrological connectivity. The ecological restoration of wetlands with the synergetic function of plants, animals and microorganisms was summarized, to improve the quality of wetland water environment and maintain the ecosystem stability. Based on the wetland close-to-natural restoration strategies, a brief ecological restoration plan for a typical wetland, Zaozhadian Wetland, near Xiong'an New Area in the north China was proposed from water resource guarantee, base pollution management, hydrological connectivity improvement and biological restoration. The close-to-natural restoration shows more effective, sustainable and long-lasting and thus a practical prospect.
Collapse
Affiliation(s)
- Yajing Cai
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China
| | - Jinsong Liang
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China
| | - Panyue Zhang
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; School of Environmental Chemical Engineering, Chongqing Three Gorges University, Chongqing, 404632, China.
| | - Qingyan Wang
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China
| | - Yan Wu
- School of Environmental Chemical Engineering, Chongqing Three Gorges University, Chongqing, 404632, China
| | - Yiran Ding
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China
| | - Hongjie Wang
- Xiong'an Institute of Eco-Environment, Hebei University, Baoding, 071002, China
| | - Chuan Fu
- School of Environmental Chemical Engineering, Chongqing Three Gorges University, Chongqing, 404632, China
| | - Jiajun Sun
- Beijing Engineering Research Center of Process Pollution Control, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| |
Collapse
|
3
|
Bermúdez M, Vilas C, Quintana R, González-Fernández D, Cózar A, Díez-Minguito M. Unravelling spatio-temporal patterns of suspended microplastic concentration in the Natura 2000 Guadalquivir estuary (SW Spain): Observations and model simulations. MARINE POLLUTION BULLETIN 2021; 170:112622. [PMID: 34146860 DOI: 10.1016/j.marpolbul.2021.112622] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 06/02/2021] [Accepted: 06/07/2021] [Indexed: 06/12/2023]
Abstract
Microplastics (MPs) patterns in a weakly-stratified estuary were investigated using a combined approach of observations and modeling. The study was conducted in the Guadalquivir River Estuary, which is of high environmental value, yet significantly altered by human activities. The study aims to contribute to understanding and quantifying the land-ocean transport of MPs. Mean concentrations of MPs in the estuary were 0.041itemsm-3, with maximum values up to 0.20itemsm-3, in agreement with the range reported in other estuaries. Polyethylene floating MPs were predominant. Relationships between increases in MP concentration and local rainfall events were identified in the middle estuary when there were no significant discharges from the head dam. Modeling results mimicked observations and revealed the effects of tidal straining, density-driven, and river flow-induced circulation on the net transport. Convergence of transports favors the MPs trapping in the vicinity of Doñana National Park, overlapping the location of the Estuarine Turbidity Maximum.
Collapse
Affiliation(s)
- María Bermúdez
- Andalusian Institute for Earth System Research (IISTA), Dept. Structural Mechanics and Hydraulics Engineering, University of Granada, Avenida del Mediterráneo s/n, Edificio CEAMA, Granada E-18006, Spain
| | - César Vilas
- Instituto de Investigación y Formación Agraria Pesquera (IFAPA), Centro El Toruño, Camino Tiro de Pichón s/n, El Puerto de Santa María E-11500, Spain
| | - Rocío Quintana
- University of Cádiz and European University of the Seas (SEA-EU), Instituto Universitario de Investigación Marina (INMAR), Departamento de Biología, Puerto Real E-11510, Spain
| | - Daniel González-Fernández
- University of Cádiz and European University of the Seas (SEA-EU), Instituto Universitario de Investigación Marina (INMAR), Departamento de Biología, Puerto Real E-11510, Spain
| | - Andrés Cózar
- University of Cádiz and European University of the Seas (SEA-EU), Instituto Universitario de Investigación Marina (INMAR), Departamento de Biología, Puerto Real E-11510, Spain
| | - Manuel Díez-Minguito
- Andalusian Institute for Earth System Research (IISTA), Dept. Structural Mechanics and Hydraulics Engineering, University of Granada, Avenida del Mediterráneo s/n, Edificio CEAMA, Granada E-18006, Spain.
| |
Collapse
|
4
|
Anthropogenic Modifications to Estuaries Facilitate the Invasion of Non-Native Species. Processes (Basel) 2021. [DOI: 10.3390/pr9050740] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
New observations of non-indigenous species (NIS) in coastal waters, such as the Gulf of Cadiz (Spain) have increased since 1980 and more or less exponentially in the last five years. Ballast water has become the most significant pathway for unintentional introductions of NIS into marine ecosystems. For example, the marine larvae of crustacean decapods that inhabit the water column could be transported in ballast water. Although elevated concentrations of metals are toxic to many marine organisms, some of them have evolved effective detoxification, or avoidance mechanisms making it possible to consider they have a superior ability to withstand exposures to these toxicants. In this text, we try to reinforce the hypothesis that anthropogenic modifications (such as chemical alterations and modified environments) benefit NIS with broad environmental tolerances. Taking these risks into account, a reinforcement of efficient Ballast Water Management Systems to respond to today’s challenging environmental conditions is discussed.
Collapse
|
5
|
Bououarour O, El Kamcha R, Boutoumit S, Pouzet P, Maanan M, Bazairi H. Effects of the Zostera noltei meadows on benthic macrofauna in North Atlantic coastal ecosystems of Morocco: spatial and seasonal patterns. Biologia (Bratisl) 2021. [DOI: 10.1007/s11756-021-00718-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
6
|
Mena F, González-Ortegón E, Solano K, Araújo CVM. The effect of the insecticide diazinon on the osmoregulation and the avoidance response of the white leg shrimp (Penaeus vannamei) is salinity dependent. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 206:111364. [PMID: 32980654 DOI: 10.1016/j.ecoenv.2020.111364] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 09/09/2020] [Accepted: 09/14/2020] [Indexed: 06/11/2023]
Abstract
Diazinon is one of the insecticides that represent a high risk for Costa Rican estuarine environments due to its widespread use in pineapple plantations. In estuaries, organisms are frequently submitted to stress caused by natural factors (e.g., continuous changes in salinity levels) and, additionally, to stress due to contamination. Therefore, the driving question of this study was: will organisms be more susceptible to suffer the deleterious effects caused by diazinon because of the stress resulting from the salinity changes? The estuarine shrimp Penaeus vannamei was used as the model organism and two responses were measured: osmoregulation (the physiological effect after a forced and continuous 24 h-exposure) and avoidance [the behavioural effect after a short (3 h) non-forced, multi-compartmented exposure]. Juveniles were exposed to diazinon (0.1, 1, 10 and 100 μg/L) at three different salinities (10, 20 and 30). Disruption in the capacity to regulate the haemolymph osmotic pressure was observed at a salinity of 30 in individuals exposed to diazinon and methanol (used as vehicle). At that salinity, the ability of shrimps to detect and avoid the highest diazinon concentrations was impaired. P. vannamei juveniles inhabit environments with a high variation in salinity, but with an optimum osmotic point close to a salinity of 20; therefore, the higher the salinity, the greater the vulnerability of shrimps to the effects of diazinon. From an ecological point of view, this combined effect of salinity and contamination might also limit the spatial distribution of the organisms.
Collapse
Affiliation(s)
- Freylan Mena
- Instituto Regional de Estudios en Sustancias Tóxicas (IRET), Universidad Nacional, 86-3000, Heredia, Costa Rica.
| | - Enrique González-Ortegón
- Department of Ecology and Coastal Management, Institute of Marine Sciences of Andalucía (CSIC), 11510, Puerto Real, Cádiz, Spain
| | - Karla Solano
- Instituto Regional de Estudios en Sustancias Tóxicas (IRET), Universidad Nacional, 86-3000, Heredia, Costa Rica
| | - Cristiano V M Araújo
- Department of Ecology and Coastal Management, Institute of Marine Sciences of Andalucía (CSIC), 11510, Puerto Real, Cádiz, Spain
| |
Collapse
|
7
|
Araújo CVM, Laissaoui A, Silva DCVR, Ramos-Rodríguez E, González-Ortegón E, Espíndola ELG, Baldó F, Mena F, Parra G, Blasco J, López-Doval J, Sendra M, Banni M, Islam MA, Moreno-Garrido I. Not Only Toxic but Repellent: What Can Organisms' Responses Tell Us about Contamination and What Are the Ecological Consequences When They Flee from an Environment? TOXICS 2020; 8:E118. [PMID: 33322739 PMCID: PMC7768353 DOI: 10.3390/toxics8040118] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 12/02/2020] [Accepted: 12/10/2020] [Indexed: 01/04/2023]
Abstract
The ability of aquatic organisms to sense the surrounding environment chemically and interpret such signals correctly is crucial for their ecological niche and survival. Although it is an oversimplification of the ecological interactions, we could consider that a significant part of the decisions taken by organisms are, to some extent, chemically driven. Accordingly, chemical contamination might interfere in the way organisms behave and interact with the environment. Just as any environmental factor, contamination can make a habitat less attractive or even unsuitable to accommodate life, conditioning to some degree the decision of organisms to stay in, or move from, an ecosystem. If we consider that contamination is not always spatially homogeneous and that many organisms can avoid it, the ability of contaminants to repel organisms should also be of concern. Thus, in this critical review, we have discussed the dual role of contamination: toxicity (disruption of the physiological and behavioral homeostasis) vs. repellency (contamination-driven changes in spatial distribution/habitat selection). The discussion is centered on methodologies (forced exposure against non-forced multi-compartmented exposure systems) and conceptual improvements (individual stress due to the toxic effects caused by a continuous exposure against contamination-driven spatial distribution). Finally, we propose an approach in which Stress and Landscape Ecology could be integrated with each other to improve our understanding of the threat contaminants represent to aquatic ecosystems.
Collapse
Affiliation(s)
- Cristiano V. M. Araújo
- Department of Ecology and Coastal Management, Institute of Marine Sciences of Andalusia (CSIC), Puerto Real, 11519 Cadiz, Spain; (E.G.-O.); (J.B.); (I.M.-G.)
| | - Abdelmourhit Laissaoui
- National Centre for Nuclear Energy, Science and Technology, BP 1381, Rabat RP 10001, Morocco;
| | - Daniel C. V. R. Silva
- Institute of Xingu Studies, Federal University of Southern and Southeastern Pará, São Félix do Xingu, PA 68507-590, Brazil;
| | - Eloisa Ramos-Rodríguez
- Department of Ecology and Institute of Water Research, University of Granada, 18010 Granada, Spain;
| | - Enrique González-Ortegón
- Department of Ecology and Coastal Management, Institute of Marine Sciences of Andalusia (CSIC), Puerto Real, 11519 Cadiz, Spain; (E.G.-O.); (J.B.); (I.M.-G.)
| | - Evaldo L. G. Espíndola
- NEEA/CRHEA/SHS, São Carlos Engineering School, University of São Paulo, Av. Trabalhador São Carlense, 400, São Carlos, SP 13.560-970, Brazil;
| | - Francisco Baldó
- Instituto Español de Oceanografía (IEO), Centro Oceanográfico de Cádiz, 11006 Cádiz, Spain;
| | - Freylan Mena
- Regional Institute for Studies on Toxic Substances (IRET), Universidad Nacional, 86-3000 Heredia, Costa Rica;
| | - Gema Parra
- Animal Biology, Plant Biology and Ecology Department, University of Jaén, 23071 Jaén, Spain;
| | - Julián Blasco
- Department of Ecology and Coastal Management, Institute of Marine Sciences of Andalusia (CSIC), Puerto Real, 11519 Cadiz, Spain; (E.G.-O.); (J.B.); (I.M.-G.)
| | - Julio López-Doval
- Catalan Institute for Water Research (ICRA), Scientific and Technological Park of the University of Girona, H2O Building, C/Emili Grahit, 101, 17003 Girona, Spain;
- Faculty of Sciences, University of Girona, Campus de Montilivi, 17003 Girona, Spain
| | - Marta Sendra
- Institute of Marine Research (IIM), National Research Council (CSIC), Eduardo Cabello 6, 36208 Vigo, Spain;
| | - Mohamed Banni
- Laboratory of Biochemistry and Environmental Toxicology, Higher Institute of Agronomy, 1349-017 Chott-Mariem, Tunisia;
| | - Mohammed Ariful Islam
- Department of Aquatic Resource Management, Faculty of Fisheries, Sylhet Agricultural University, Sylhet 3100, Bangladesh;
| | - Ignacio Moreno-Garrido
- Department of Ecology and Coastal Management, Institute of Marine Sciences of Andalusia (CSIC), Puerto Real, 11519 Cadiz, Spain; (E.G.-O.); (J.B.); (I.M.-G.)
| |
Collapse
|
8
|
Scanes E, Scanes PR, Ross PM. Climate change rapidly warms and acidifies Australian estuaries. Nat Commun 2020; 11:1803. [PMID: 32286277 PMCID: PMC7156424 DOI: 10.1038/s41467-020-15550-z] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Accepted: 03/05/2020] [Indexed: 11/09/2022] Open
Abstract
Climate change is impacting ecosystems worldwide. Estuaries are diverse and important aquatic ecosystems; and yet until now we have lacked information on the response of estuaries to climate change. Here we present data from a twelve-year monitoring program, involving 6200 observations of 166 estuaries along >1100 kilometres of the Australian coastline encompassing all estuary morphologies. Estuary temperatures increased by 2.16 °C on average over 12 years, at a rate of 0.2 °C year-1, with waters acidifying at a rate of 0.09 pH units and freshening at 0.086 PSU year-1. The response of estuaries to climate change is dependent on their morphology. Lagoons and rivers are warming and acidifying at the fastest rate because of shallow average depths and limited oceanic exchange. The changes measured are an order of magnitude faster than predicted by global ocean and atmospheric models, indicating that existing global models may not be useful to predict change in estuaries.
Collapse
Affiliation(s)
- Elliot Scanes
- School of Life and Environmental Sciences, the University of Sydney, Sydney, NSW, Australia.
| | - Peter R Scanes
- Estuaries and Catchments Science, New South Wales Department of Planning, Industry and Environment, Sydney, NSW, Australia
| | - Pauline M Ross
- School of Life and Environmental Sciences, the University of Sydney, Sydney, NSW, Australia
| |
Collapse
|
9
|
Qiu D, Yan J, Ma X, Gao F, Wang F, Wen L, Bai J, Cui B. How vegetation influence the macrobenthos distribution in different saltmarsh zones along coastal topographic gradients. MARINE ENVIRONMENTAL RESEARCH 2019; 151:104767. [PMID: 31416599 DOI: 10.1016/j.marenvres.2019.104767] [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: 06/12/2019] [Revised: 08/01/2019] [Accepted: 08/04/2019] [Indexed: 06/10/2023]
Abstract
Macrobenthos are a key constituent of coastal salt marsh ecosystems and have often been used as sensitive indicators of the environment quality. In this study, field investigations in vegetated regions and adjacent bare patches of low, middle and high marshes were conducted to explore whether and how vegetation influence the macrobenthos distribution in different saltmarsh zones along coastal topographic gradients. Results showed that vegetation positively or negatively influenced macrobenthos mainly by changing their environment in different saltmarsh zones, as there were different degrees of physical stresses and food supply for the macrobenthos from the low to the high marsh. In the low marsh, no major differences in macrobenthos indices between the bare and vegetated sediments were found, yet density and biomass of the molluscs were higher in the bare patches. In the middle marsh, vegetation promoted the biomass and diversity indices but not the density and species richness of the macrobenthos, and vegetation was beneficial for some types of crustaceans but was detrimental for some types of polychaetes. In the high marsh, vegetation promoted the biomass, density, and species richness of the macrobenthos compared to those of adjacent bare patches. Coastal topographic gradients also had effects on macrobenthos distribution consistently with different habitat preferences and ecological niches, and the low marsh had the highest species richness, Shannon diversity, Pielou evenness and Margalef richness. This study also provided scientific implications for the management and restoration of the ecosystems in different intertidal saltmarsh zones.
Collapse
Affiliation(s)
- Dongdong Qiu
- School of Environment, State Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing, 100875, China
| | - Jiaguo Yan
- School of Environment, State Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing, 100875, China
| | - Xu Ma
- School of Environment, State Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing, 100875, China
| | - Fang Gao
- School of Environment, State Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing, 100875, China
| | - Fangfang Wang
- School of Environment, State Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing, 100875, China
| | - Lijia Wen
- School of Environment, State Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing, 100875, China
| | - Junhong Bai
- School of Environment, State Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing, 100875, China
| | - Baoshan Cui
- School of Environment, State Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing, 100875, China.
| |
Collapse
|
10
|
Donázar-Aramendía I, Sánchez-Moyano JE, García-Asencio I, Miró JM, Megina C, García-Gómez JC. Human pressures on two estuaries of the Iberian Peninsula are reflected in food web structure. Sci Rep 2019; 9:11495. [PMID: 31395902 PMCID: PMC6687818 DOI: 10.1038/s41598-019-47793-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Accepted: 07/23/2019] [Indexed: 11/09/2022] Open
Abstract
As a result of the increased urban and agricultural development in coastal environments, estuaries are among the most modified and threatened aquatic ecosystems. This study used stable isotopes to examine the effects of human impacts by contrasting the food web structures of two Iberian estuaries exposed to different degrees of human pressure. More complex feeding pathways were found in the more altered estuary (Guadalquivir). Greater spread among species along the carbon axis suggests that the primary consumers exploit organic matter with various origins, whereas different nitrogen signals of the secondary consumers suggest that they feed on different suites of prey. In contrast, the similar isotopic signals of secondary consumers in the relatively little influenced estuary (Guadiana) suggests similarity in diet composition and feeding on the same organic matter sources. Understanding trophic interactions in estuaries is vital for defining proper management and conservation, and the preliminary data provided here are one step in this direction.
Collapse
Affiliation(s)
- I Donázar-Aramendía
- Laboratorio Biología Marina, Seville Aquarium R + D + I Biological Research Area., Dpto. Zoología, Facultad de Biología, Universidad de Sevilla, Avd. Reina Mercedes 6, 41012, Sevilla, Spain.
| | - J E Sánchez-Moyano
- Dpto. Zoología, Facultad de Biología, Universidad de Sevilla, Avd. Reina Mercedes 6, 41012, Sevilla, Spain
| | - I García-Asencio
- Dpto. Zoología, Facultad de Biología, Universidad de Sevilla, Avd. Reina Mercedes 6, 41012, Sevilla, Spain
| | - J M Miró
- Laboratorio Biología Marina, Seville Aquarium R + D + I Biological Research Area., Dpto. Zoología, Facultad de Biología, Universidad de Sevilla, Avd. Reina Mercedes 6, 41012, Sevilla, Spain
| | - C Megina
- Biodiversidad y Ecología Acuática, Seville Aquarium R + D + I Biological Research Area, Facultad de Biología, Universidad de Sevilla, Avd. Reina Mercedes 6, 41012, Sevilla, Spain
| | - J C García-Gómez
- Laboratorio Biología Marina, Seville Aquarium R + D + I Biological Research Area., Dpto. Zoología, Facultad de Biología, Universidad de Sevilla, Avd. Reina Mercedes 6, 41012, Sevilla, Spain
| |
Collapse
|
11
|
González-Ortegón E, Laiz I, Sánchez-Quiles D, Cobelo-Garcia A, Tovar-Sánchez A. Trace metal characterization and fluxes from the Guadiana, Tinto-Odiel and Guadalquivir estuaries to the Gulf of Cadiz. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 650:2454-2466. [PMID: 30293001 DOI: 10.1016/j.scitotenv.2018.09.290] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2018] [Revised: 09/21/2018] [Accepted: 09/22/2018] [Indexed: 06/08/2023]
Abstract
Metals transported into the coastal zone by the South Iberian rivers are key to understand the biogeochemical cycles and distribution of trace elements in the Gulf of Cadiz (GoC hereinafter) and the exchange with the Mediterranean Sea. Previous studies carried out in the 80s have suggested that metal enrichment in the Alboran Sea (Western Mediterranean) is related with fluvial inputs from acid mine drainage from the Tinto and Odiel rivers. The present study evaluates the contribution of dissolved trace metal concentrations (i.e. Cd, Co, Cu, Fe, Mo, Ni, Pb, V, Zn) from the three main rivers discharging into the GoC (i.e. Guadiana, Tinto-Odiel and Guadalquivir rivers). Our results show that the metal composition of water discharged from each river is impacted by the activities developed in the course of the rivers, which clearly influence the GoC coastal surface waters composition. Metal fluxes from the Guadalquivir river are quantitatively higher than those from the Tinto-Odiel (e.g. up to 73% and 19% higher for Ni and Cu, respectively). Although the metal concentrations spatial distributions in the GoC are dominated by the circulation pattern between the Atlantic and the Mediterranean Sea, the concentrations within the GoC continental shelf could be explained by a greater contribution from the Guadalquivir estuary (e.g. 80.5%, 54.6%, 56.5% and 56.6% for Ni, Cu, Mo, and V respectively).
Collapse
Affiliation(s)
- E González-Ortegón
- Instituto de Ciencias Marinas de Andalucía (ICMAN-CSIC), Campus Universitario Río San Pedro, 11510 Puerto Real, Cádiz, Spain; Campus de Excelencia Internacional del Mar (CEIMAR), Spain.
| | - I Laiz
- Dept. of Applied Physics, University of Cadiz, Campus Universitario Río San Pedro, 11510 Puerto Real, Cádiz, Spain
| | - D Sánchez-Quiles
- Instituto de Ciencias Marinas de Andalucía (ICMAN-CSIC), Campus Universitario Río San Pedro, 11510 Puerto Real, Cádiz, Spain
| | - A Cobelo-Garcia
- Instituto de Investigaciones Marinas (IIM-CSIC), Vigo, Spain
| | - A Tovar-Sánchez
- Instituto de Ciencias Marinas de Andalucía (ICMAN-CSIC), Campus Universitario Río San Pedro, 11510 Puerto Real, Cádiz, Spain
| |
Collapse
|
12
|
Venâncio C, Castro BB, Ribeiro R, Antunes SC, Abrantes N, Soares AMVM, Lopes I. Sensitivity of freshwater species under single and multigenerational exposure to seawater intrusion. Philos Trans R Soc Lond B Biol Sci 2018; 374:20180252. [PMID: 30509925 PMCID: PMC6283950 DOI: 10.1098/rstb.2018.0252] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/25/2018] [Indexed: 01/01/2023] Open
Abstract
Salinization of coastal freshwater ecosystems is already occurring in some regions of the world. This phenomenon raises serious concerns on the protection of coastal freshwater ecosystems, since many of them support and shelter a large number of species and are considered hotspots of biodiversity. This work intended to assess the adverse effects that salinization, caused by the intrusion of seawater (SW), may pose to freshwater organisms. In this study, three specific goals were addressed: (i) to assess if sodium chloride (NaCl) may be used as a surrogate of natural SW at early-stages of risk assessment; (ii) to identify the most sensitive freshwater species to salinity NaCl; and (iii) to determine if increased tolerance to salinity may be acquired after multigenerational exposure to low levels of salinization (induced with NaCl). A total of 12 standard monospecific bioassays were carried out by exposing organisms from different taxonomic groups (Cyanobacteria: one species, Tracheophyta: two species, Rotifera: one species, Arthropoda: two species and Mollusca: one species) to a series of concentrations of NaCl (ranging from 0.95 to 22.8 mS cm-1) or dilutions of SW (ranging from 1.70 to 52.3 mS cm-1). In general, NaCl exerted similar or higher toxicity than SW, both at lethal and sublethal levels, suggesting that it may be proposed as a protective surrogate of SW for first tiers of salinization risk assessment. Among all tested species, the cyanobacterium Cylindrospermopsis raciborskii, the daphnid Daphnia longispina and the rotifer Brachionus plicatilis were the most sensitive taxa to salinization (EC50 ≤ 4.38 mS cm-1). Given their position at the basis of the food web, it is suggested that small increments of salinity may be enough to induce structural changes in freshwater communities or induce changes in trophic relations. No clear evidences of increased tolerance after multigenerational exposure to low levels of salinity were found.This article is part of the theme issue 'Salt in freshwaters: causes, ecological consequences and future prospects'.
Collapse
Affiliation(s)
- C Venâncio
- Department of Biology and CESAM, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - B B Castro
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Braga, Portugal
| | - R Ribeiro
- CFE-Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal
| | - S C Antunes
- Department of Biology, Faculty of Sciences and CIIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - N Abrantes
- Department of Environment and Centre for Environmental and Marine Studies (CESAM), University of Aveiro, 3810-193 Aveiro, Portugal
| | - A M V M Soares
- Department of Biology and CESAM, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - I Lopes
- Department of Biology and CESAM, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| |
Collapse
|
13
|
Levesque B, Cachot J, Boët P, Lepage M, Mazella N, Martin C, Gourves PY, Legeay A. Seasonal variations of contamination and exoskeletal malformations in the white shrimps Palaemon longirostris in the Gironde estuary, France. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:22689-22701. [PMID: 29851016 DOI: 10.1007/s11356-018-2241-6] [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: 06/19/2017] [Accepted: 05/06/2018] [Indexed: 06/08/2023]
Abstract
Since the end of the 1980s, white shrimps (Palaemon longirostris) from the Gironde estuary have exhibited exoskeletal malformations, mainly involving cephalothorax, rostrum, scaphocerites and uropods. An 8-month study was carried out in 2015. Each month, 200 individuals were sampled and examined for exoskeletal malformations. Temporal variations in malformation frequency were noted, particularly during the breeding period, along with decreases in the size of non-deformed shrimps related to the appearance of juveniles in breeding sites, and high mortality among deformed shrimps. A significant increase in proportions of deformed shrimp was observed, relating particularly to the size (and therefore the age) of individuals. No significant difference was found between shrimp proportions with different numbers of malformations (one to four) for a fixed size class, nor was there any variation in proportions within different size classes for a fixed number of malformations. This would appear to indicate that the number of malformations is acquired and new malformations do not seem to appear during the life cycle, except for the smallest (youngest) shrimps. The malformation spectrum showed no significant differences between the biggest and smallest individuals for the different malformation associations, except for those involving cephalothorax, rostrum and uropods. This would suggest that some malformation associations lead to a higher mortality rate in shrimps subjected to them, due to greater impairment of feeding and/or swimming behaviour. Multiple component analysis of the different types of malformation showed correlations between exoskeletal pieces (rostrum and cephalothorax) and appendixes (scaphocerites and uropods). Regarding metal contamination in shrimp, no significant difference was highlighted between deformed and non-deformed shrimps. Organic pollutants were not measured in tissues. Certain herbicides such as metolachlore and chlortoluron were detected at high concentrations in the Gironde estuary during the breeding period corresponding to the higher occurrence of exoskeletal malformations.
Collapse
Affiliation(s)
| | - Jérôme Cachot
- Université de Bordeaux, EPOC UMR 5805, 33400, Talence, France
| | - Philippe Boët
- Irstea, UR EABX, av.de Verdun, 33612, Cestas, France
| | - Mario Lepage
- Irstea, UR EABX, av.de Verdun, 33612, Cestas, France
| | | | | | - Pierres-Yves Gourves
- UMR CNRS 5805 EPOC-OASU Station Marine d'Arcachon Université de Bordeaux Place du Docteur Bertrand Peyneau, 33120, Arcachon Cedex, France
| | - Alexia Legeay
- UMR CNRS 5805 EPOC-OASU Station Marine d'Arcachon Université de Bordeaux Place du Docteur Bertrand Peyneau, 33120, Arcachon Cedex, France
| |
Collapse
|
14
|
González-Ortegón E, Amaral V, Baldó F, Sánchez-Leal RF, Bellanco MJ, Jiménez MP, Forja J, Vilas C, Tovar-Sanchez A. Sources and coastal distribution of dissolved organic matter in the Gulf of Cadiz. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 630:1583-1595. [PMID: 29554775 DOI: 10.1016/j.scitotenv.2018.02.293] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 02/23/2018] [Accepted: 02/25/2018] [Indexed: 06/08/2023]
Abstract
Dissolved organic matter (DOM) is a major component of the organic matter pool, playing a key role in the global ocean functioning. However, studies on DOM in waters of many ocean regions, such as the Gulf of Cadiz (GoC), are poorly known. Advanced aquatic sensors enable autonomous for long-term deployments in situ collection of high frequency DOM data using fluorescent dissolved organic matter (FDOM) as a proxy. The present study evaluates the relevance of FDOM, the estuarine influence and the environmental factors that determine its spatial distribution in the GoC. Our results suggest that the GoC water mass, under the estuarine influence of three main rivers, is receiving large amounts of DOM transported mainly by Guadalquivir and Guadiana rivers and much less from Tinto-Odiel. Salinity is the main factor explaining the FDOM variability within the Guadalquivir and Guadiana rivers and in the inner shelf of the GoC. In the outer shelf of the GoC, plankton-produced DOM could explain the persistent spatial pattern of FDOM, playing an important role in the dynamics of FDOM from the North area of the GoC through the persistent low-salinity Eastern North Atlantic Central Water. The oceanographic dynamics and the spatial pattern of FDOM concentration in the continental shelf of the GoC suggest a net transport of FDOM through the GCC (Gulf of Cadiz Current) to the Mediterranean Sea.
Collapse
Affiliation(s)
- E González-Ortegón
- Instituto de Ciencias Marinas de Andalucía (CSIC), Campus Universitario Río San Pedro, 11519 Puerto Real, Cádiz, Spain; CEI-MAR International Campus of Excellence of the Sea, Spain.
| | - V Amaral
- Departamento de Química-Física, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Campus Río San Pedro s/n, Puerto Real, Cádiz 11510, Spain; Ecología Funcional de Sistemas Acuáticos, Centro Universitario Regional Este, Universidad de la República, Rocha, Uruguay
| | - F Baldó
- Instituto Español de Oceanografía, Centro Oceanográfico de Cádiz, Puerto Pesquero, Muelle de Levante s/n, 11006 Cádiz, Spain
| | - Ricardo F Sánchez-Leal
- Instituto Español de Oceanografía, Centro Oceanográfico de Cádiz, Puerto Pesquero, Muelle de Levante s/n, 11006 Cádiz, Spain
| | - María J Bellanco
- Instituto Español de Oceanografía, Centro Oceanográfico de Cádiz, Puerto Pesquero, Muelle de Levante s/n, 11006 Cádiz, Spain
| | - María P Jiménez
- Instituto Español de Oceanografía, Centro Oceanográfico de Cádiz, Puerto Pesquero, Muelle de Levante s/n, 11006 Cádiz, Spain
| | - J Forja
- Departamento de Química-Física, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Campus Río San Pedro s/n, Puerto Real, Cádiz 11510, Spain
| | - César Vilas
- IFAPA Centro El Toruño, Camino Tiro de Pichón s/n, 11500 El Puerto de Santa María, Spain
| | - A Tovar-Sanchez
- Instituto de Ciencias Marinas de Andalucía (CSIC), Campus Universitario Río San Pedro, 11519 Puerto Real, Cádiz, Spain
| |
Collapse
|
15
|
Pezy JP, Baffreau A, Dauvin JC. What are the factors driving long-term changes of the suprabenthos in the Seine estuary? MARINE POLLUTION BULLETIN 2017; 118:307-318. [PMID: 28298248 DOI: 10.1016/j.marpolbul.2017.03.008] [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: 12/09/2016] [Revised: 03/02/2017] [Accepted: 03/06/2017] [Indexed: 06/06/2023]
Abstract
A Before/During/After Control-Impact approach is used to assess the effects of Port 2000 on the suprabenthos in the North Channel (NC) of the Seine estuary during the period from September 2001 to October 2015. Since the beginning of Port 2000 construction (2002-2005), the NC is affected by an increase of salinity (marine influence) and input of sand. The suprabenthos changes are mainly characterised by an increase in species richness in the upper part of the NC and a decrease in species density and biomass of the dominant mysid species over time. Multiple stressors (natural and anthropogenic) have been operating simultaneously (hydrological changes, construction of Port 2000, supplementary dredging) rendering the interpretation of the biological changes difficult. Thus, the present results evidenced a combination of changes in the Seine Estuary not only attributed to the impact of the Port 2000 construction.
Collapse
Affiliation(s)
- Jean-Philippe Pezy
- Normandie Univer., UNICAEN, UNIROUEN, Laboratoire Morphodynamique Continentale et Côtière, CNRS UMR 6143M2C, 24 rue des Tilleuls, F-14000 Caen, France.
| | - Alexandrine Baffreau
- Normandie Univer., UNICAEN, UNIROUEN, Laboratoire Morphodynamique Continentale et Côtière, CNRS UMR 6143M2C, 24 rue des Tilleuls, F-14000 Caen, France
| | - Jean-Claude Dauvin
- Normandie Univer., UNICAEN, UNIROUEN, Laboratoire Morphodynamique Continentale et Côtière, CNRS UMR 6143M2C, 24 rue des Tilleuls, F-14000 Caen, France
| |
Collapse
|
16
|
González-Ortegón E, Palero F, Lejeusne C, Drake P, Cuesta JA. A salt bath will keep you going? Euryhalinity tests and genetic structure of caridean shrimps from Iberian rivers. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 540:11-19. [PMID: 26118862 DOI: 10.1016/j.scitotenv.2015.06.028] [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: 04/15/2015] [Revised: 06/05/2015] [Accepted: 06/06/2015] [Indexed: 06/04/2023]
Abstract
We assessed the role of euryhalinity and life-history traits on the population genetic structure of the four main caridean shrimp species from the Iberian Peninsula (Atyaephyra desmarestii, Dugastella valentina, Palaemon varians and Palaemon zariquieyi) able to complete their life cycle in freshwater/oligohaline habitats. Seawater exposure experiments indicated that A. desmarestii, D. valentina and P. zariquieyi are more sensitive to high salinity waters than P. varians and confirm the relationship between osmolality regulation and spatial distribution of species. The limited or no survival in seawater could explain the restricted distributions observed in D. valentina and P. zariquieyi, whereas the current A. desmarestii distribution could be due to either past river dynamics and/or human-mediated water transfers. Conversely, the high tolerance of P. varians to a large salinity range (euryhalinity) could explain its capacity to colonize geographically distant estuaries. In agreement with osmoregulation results, the phylogeography patterns of the cytochrome oxidase 1 (Cox 1) gene fragment revealed significant genetic differentiation among river systems whatever the species considered. Atyidae species presented higher nucleotide diversity levels than Palaemonidae species, while isolation-by-distance patterns were only found for the latter. Our results have important implications for the management and conservation of freshwater species, since the inter-catchment connectivity may affect the speciation processes.
Collapse
Affiliation(s)
| | - Ferran Palero
- INRA, Univ. Nice Sophia Antipolis, CNRS, UMR 1355-7254 Institut Sophia Agrobiotech, 06900 Sophia Antipolis, France
| | - Christophe Lejeusne
- Sorbonne Universités, UPMC University Paris 06, Laboratory "Adaptation and Diversity in the Marine Environment", Team "Diversity and Connectivity in Coastal Marine Landscapes", UMR 7144, Station Biologique de Roscoff, F-29680 Roscoff, France; Centre National de la Recherche Scientifique (CNRS), Laboratory "Adaptation and Diversity in the Marine Environment", Team "Diversity and Connectivity in Coastal Marine Landscapes", UMR 7144, Station Biologique de Roscoff, F-29680 Roscoff, France
| | - Pilar Drake
- Instituto de Ciencias Marinas de Andalucía (CSIC), Avda. República Saharaui, 2, 11519 Puerto Real, Cádiz, Spain
| | - Jose A Cuesta
- Instituto de Ciencias Marinas de Andalucía (CSIC), Avda. República Saharaui, 2, 11519 Puerto Real, Cádiz, Spain
| |
Collapse
|
17
|
González-Ortegón E, Walton MEM, Moghaddam B, Vilas C, Prieto A, Kennedy HA, Pedro Cañavate J, Le Vay L. Flow regime in a restored wetland determines trophic links and species composition in the aquatic macroinvertebrate community. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 503-504:241-250. [PMID: 25242150 DOI: 10.1016/j.scitotenv.2014.09.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Revised: 09/01/2014] [Accepted: 09/01/2014] [Indexed: 06/03/2023]
Abstract
In a restored wetland (South of Spain), where different flow regimes control water exchange with the adjacent Guadalquivir estuary, the native Palaemon varians coexists with an exotic counterpart species Palaemon macrodactylus. This controlled m\acrocosm offers an excellent opportunity to investigate how the effects of water management, through different flow regimes, and the presence of a non-native species affect the aquatic community and the trophic niche (by gut contents and C-N isotopic composition) of the native shrimp Palaemon varians. We found that increased water exchange rate (5% day(-1) in mixed ponds vs. 0.1% day(-1) in extensive ponds) modified the aquatic community of this wetland; while extensive ponds are dominated by isopods and amphipods with low presence of P. macrodactylus, mixed ponds presented high biomass of mysids, corixids, copepods and both shrimp species. An estuarine origin of nutrients and primary production might explain seasonal and spatial differences found among ponds of this wetland. A combined analysis of gut contents and isotopic composition of the native and the exotic species showed that: (1) native P. varians is mainly omnivorous (2) while the non-native P. macrodactylus is more zooplanktivorous and (3) a dietary overlap occurred when both species coexist at mixed ponds where a higher water exchange and high abundance of mysids and copepods diversifies the native species' diet. Thus differences in the trophic ecology of both species are clearly explained by water management. This experimental study is a valuable tool for integrated management between river basin and wetlands since it allows quantification of wetland community changes in response to the flow regime.
Collapse
Affiliation(s)
- E González-Ortegón
- School of Ocean Sciences, Bangor University, Menai Bridge LL59 5AB, UK; IFAPA Centro El Toruño, Camino Tiro de Pichón s/n, 11500 El Puerto de Santa María, Spain.
| | - M E M Walton
- School of Ocean Sciences, Bangor University, Menai Bridge LL59 5AB, UK
| | - B Moghaddam
- School of Ocean Sciences, Bangor University, Menai Bridge LL59 5AB, UK
| | - C Vilas
- IFAPA Centro El Toruño, Camino Tiro de Pichón s/n, 11500 El Puerto de Santa María, Spain
| | - A Prieto
- IFAPA Centro El Toruño, Camino Tiro de Pichón s/n, 11500 El Puerto de Santa María, Spain
| | - H A Kennedy
- School of Ocean Sciences, Bangor University, Menai Bridge LL59 5AB, UK
| | - J Pedro Cañavate
- IFAPA Centro El Toruño, Camino Tiro de Pichón s/n, 11500 El Puerto de Santa María, Spain
| | - L Le Vay
- School of Ocean Sciences, Bangor University, Menai Bridge LL59 5AB, UK
| |
Collapse
|