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Šigutová H, Pyszko P, Bílková E, Prieložná V, Dolný A. Sum or mean in calculation of qualitative scoring methods using the Dragonfly Biotic Index, and an alternative approach facilitating conservation prioritization. Sci Rep 2024; 14:11356. [PMID: 38762626 PMCID: PMC11102514 DOI: 10.1038/s41598-024-62017-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 05/13/2024] [Indexed: 05/20/2024] Open
Abstract
Qualitative scoring methods are tools for rapid freshwater health assessments. Total score is often calculated as the sum or mean of the values of the species involved, with minor nuances in interpretation, but with significant implications. We used the Dragonfly Biotic Index (DBI) calculated on Central European odonate species to demonstrate these implications. Each species within a community has a score ranging from 0 (widespread generalists) to 9 (sensitive specialists). A total score is calculated as the sum of the scores of all species (DBIsum) or is calculated by dividing by species richness (DBImean). Despite this duality, there has been little debate on either approach. Using simulated scenarios (high vs low richness, presence or absence of high- or low-scoring species), we tested the implications of DBIsum and DBImean and suggested a total score calculation for conservation prioritization based on permutation. This algorithm shows the percentile of a community compared to a set of randomly assembled communities of the same species richness. We also present the 'dragDBI' package for the statistical software R, a tool for more automated DBI-based environmental health assessments. Our permutational calculation is applicable to other macroinvertebrate-based scoring methods, such as the Biological Monitoring Working Party and the Average Score Per Taxon.
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Affiliation(s)
- Hana Šigutová
- Department of Zoology, Faculty of Science, Palacký University, Olomouc, Czech Republic
| | - Petr Pyszko
- Department of Biology and Ecology, Faculty of Science, University of Ostrava, Chittussiho 10, 710 00, Ostrava, Czech Republic
| | - Eva Bílková
- Department of Biology and Ecology, Faculty of Science, University of Ostrava, Chittussiho 10, 710 00, Ostrava, Czech Republic
| | - Veronika Prieložná
- Department of Biology and Ecology, Faculty of Science, University of Ostrava, Chittussiho 10, 710 00, Ostrava, Czech Republic
| | - Aleš Dolný
- Department of Biology and Ecology, Faculty of Science, University of Ostrava, Chittussiho 10, 710 00, Ostrava, Czech Republic.
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Darshetkar A, Patwardhan A, Koparde P. A comparison of four sampling techniques for assessing species richness of adult odonates at riverbanks. JOURNAL OF THREATENED TAXA 2023. [DOI: 10.11609/jott.7259.15.1.22471-22478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Members of the insect order Odonata are known as good ecological indicators. Many are sensitive to habitat modifications and are easily monitored for use in environmental assessment studies. Rapid assessments rely on efficient sampling techniques. However, there is limited information available on sampling techniques for adult odonates, and protocols require evaluation. To do this, we standardized counting methods during sampling of odonates from August to November 2016 at the Mula River, Pune, India. We used four counting techniques; full-width belt transect (FWBT), full-circle point count (FCPC), half-width belt transect (HWBT), and half-circle point count (HCPC). For HWBT and HCPC areas facing the river were sampled, and for each technique we took multiple temporal replicates. We compared species detected per unit time, species detected per unit area, new species detected per unit time, and new species detected per unit area. Additionally, we compared species estimates. With HCPC we detected the maximum number of species and new species per unit area, whereas FWBT returned maximum coverage of recorded species. We recommend our proposed techniques be considered in the future across various habitats to decide the most suitable sampling strategy for the different habitats or situations.
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Petrovičová K, Langraf V, David S, Krumpálová Z, Schlarmannová J. Distinct Odonata assemblage variations in lentic reservoirs in Slovakia (Central Europe). Biologia (Bratisl) 2021. [DOI: 10.1007/s11756-021-00864-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Structuring of Dragonfly Communities (Insecta: Odonata) in Eastern Amazon: Effects of Environmental and Spatial Factors in Preserved and Altered Streams. INSECTS 2019; 10:insects10100322. [PMID: 31569784 PMCID: PMC6835646 DOI: 10.3390/insects10100322] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 08/26/2019] [Accepted: 08/29/2019] [Indexed: 11/18/2022]
Abstract
The evaluation of the effects of environmental factors on natural communities has been one of the principal approaches in ecology; although, over the past decade, increasing importance has been given to spatial factors. In this context, we evaluated the relative importance of environmental and spatial factors for the structuring of the local odonate communities in preserved and altered streams. Adult Odonata were sampled in 98 streams in eastern Amazonia, Brazil. The physical features of each stream were evaluated and spatial variables were generated. Only environmental factors accounted for the variation in the Odonata community. The same pattern was observed in the suborder Zygoptera. For Anisoptera, environmental factors alone affect the variation in the community, considering all the environments together, and the altered areas on their own. As the two Odonata suborders presented distinct responses to environmental factors, this partitioning may contribute to an improvement in the precision of studies in biomonitoring. We thus suggest that studies would have a greater explanatory potential if additional variables are included, related to biotic interactions (e.g., competition). This will require further investigation on a finer scale of environmental variation to determine how the Odonata fauna of Amazonian streams behaves under this analytical perspective.
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Mendes TP, Oliveira-Junior JMB, Cabette HSR, Batista JD, Juen L. Congruence and the Biomonitoring of Aquatic Ecosystems: Are Odonate Larvae or Adults the Most Effective for the Evaluation of Impacts. NEOTROPICAL ENTOMOLOGY 2017; 46:631-641. [PMID: 28303462 DOI: 10.1007/s13744-017-0503-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Accepted: 02/20/2017] [Indexed: 06/06/2023]
Abstract
Odonata have been widely used as indicators for the biomonitoring of terrestrial and aquatic habitats due to their sensitivity to environmental impacts. We aimed to determine whether the larval or adult phases of these insects were the best predictors of variation in habitat parameters and the loss of environmental integrity. Specimens were collected during three seasons (dry, rainy, and ebb) from 12 points in the Suiá-missu River basin, at the headwaters of the Xingu River in Mato Grosso, Brazil. The Protest analysis indicated a high degree of congruence between the assemblages of larvae and adults in streams with varying degrees of habitat integrity (R = 0.832, p < 0.001, m 2 = 0.307). When the congruence with environmental factors was analyzed, a significant association was found only for the larval phase (R = 0.318, p = 0.03, m 2 = 0.888). When the suborders were analyzed separately, congruence was confirmed for anisopteran adults (R = 0.338, p = 0.031, m 2 = 0.885) and larvae (R = 0.417, p = 0.003, m 2 = 0.826) and for the zygopteran adults (R = 0.345, p = 0.027, m 2 = 0.881) and larvae (R = 0.405, p = 0.011, m 2 = 0.836). These results indicate that both larvae and adults respond systematically to environmental impacts. We suggest that either life phase can be used for biomonitoring, given their effectiveness for the interpretation of disturbance in terrestrial and aquatic habitats. These findings further reinforce the effectiveness of this insect order for the detection of modifications to the environment, showing that they are good indicators of environmental conditions.
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Affiliation(s)
- T P Mendes
- Ecology and Conservation Lab, Graduate Program in Zoology, Univ Federal do Pará-UFPA, Museu Paraense Emilio Goeldi-MPEG, Belém, PA, Brasil.
| | - J M B Oliveira-Junior
- Ecology and Conservation Lab, Graduate Program in Zoology, Univ Federal do Pará-UFPA, Museu Paraense Emilio Goeldi-MPEG, Belém, PA, Brasil
| | - H S R Cabette
- Entomology Lab, Dept of Biology, Univ do Estado de Mato Grosso-UNEMAT, Nova Xavantina, MT, Brasil
| | - J D Batista
- Entomology Lab, Dept of Biology, Univ do Estado de Mato Grosso-UNEMAT, Nova Xavantina, MT, Brasil
| | - L Juen
- Ecology and Conservation Lab, Graduate Program in Zoology, Univ Federal do Pará-UFPA, Museu Paraense Emilio Goeldi-MPEG, Belém, PA, Brasil
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Samways MJ, Pryke JS. Large-scale ecological networks do work in an ecologically complex biodiversity hotspot. AMBIO 2016; 45:161-72. [PMID: 26377111 PMCID: PMC4752566 DOI: 10.1007/s13280-015-0697-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Revised: 09/01/2015] [Accepted: 09/02/2015] [Indexed: 06/05/2023]
Abstract
Landscape-scale ecological networks (ENs) are interconnected conservation corridors of high-quality habitat used to mitigate the adverse effects of landscape fragmentation and to connect with protected areas. The effectiveness of ENs for biodiversity conservation and ecosystem function has been challenged. Here we show how an extensive system of ENs of remnant historic land was put in place at a large spatial scale (>0.5 million ha) in a plantation forestry context in a global biodiversity hotspot in southern Africa. These ENs can maintain indigenous and historic compositional and functional biodiversity, even in an area prone to the challenging effects of El Niño. Furthermore, ENs increase the effective size of local protected areas. Socio-ecological solutions and financial viability are also integrated as part of practical implementation of ENs. By adopting a retrospective analytical approach, biodiversity is maintained while also having productive forestry, making this a powerful agro-ecological approach on a large conservation-significant scale.
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Affiliation(s)
- Michael J Samways
- Department of Conservation Ecology and Entomology, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa.
| | - James S Pryke
- Department of Conservation Ecology and Entomology, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa.
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de Oliveira-Junior JMB, Shimano Y, Gardner TA, Hughes RM, de Marco Júnior P, Juen L. Neotropical dragonflies (Insecta: Odonata) as indicators of ecological condition of small streams in the eastern Amazon. AUSTRAL ECOL 2015. [DOI: 10.1111/aec.12242] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- José Max Barbosa de Oliveira-Junior
- Programa de Pós-Graduação em Ecologia e Conservação; Universidade do Estado de Mato Grosso; Br 158, Km 655 CEP: 78690-000 Nova Xavantina Mato Grosso Brazil
- Programa de Pós-Graduação em Zoologia; Laboratório de Ecologia e Conservação; Universidade Federal do Pará/Museu Paraense Emílio Goeldi; Rua Augusto Correia, N° 1, Bairro Guamá CEP: 66075-110 Belém Pará Brazil
| | - Yulie Shimano
- Programa de Pós-Graduação em Zoologia; Laboratório de Ecologia e Conservação; Universidade Federal do Pará/Museu Paraense Emílio Goeldi; Rua Augusto Correia, N° 1, Bairro Guamá CEP: 66075-110 Belém Pará Brazil
| | | | - Robert M. Hughes
- Amnis Opes Institute and Department of Fisheries and Wildlife; Oregon State University; Corvallis Oregon USA
| | - Paulo de Marco Júnior
- Laboratório de Ecologia Teórica e Síntese; Departamento de Ecologia; Universidade Federal de Goiás; Goiânia Goiás Brazil
| | - Leandro Juen
- Instituto de Ciências Biológicas; Laboratório de Ecologia e Conservação; Instituto de Ciências Biológicas; Universidade Federal do Pará; Belém Pará Brazil
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Species composition, distribution and habitat types of Odonata in the iSimangaliso Wetland Park, KwaZulu-Natal, South Africa and the associated conservation implications. PLoS One 2014; 9:e92588. [PMID: 24662948 PMCID: PMC3963920 DOI: 10.1371/journal.pone.0092588] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2013] [Accepted: 02/23/2014] [Indexed: 11/19/2022] Open
Abstract
Maputaland–Pondoland–Albany, South Africa has been identified as a biodiversity hotspot and centre for endemism. Odonata make good indicators of freshwater ecosystem health. Consequently we compiled a list of Odonata species recorded to date in the iSimangaliso Wetland Park. We then detailed important species in terms of endemism, conservation status, and potential as indicator species. Finally, we compared Odonata assemblages of different sites sampled within the park to illustrate habitat importance. Species identified during two formal surveys and incidental observations made during the study period were combined with an existing database to compile an accurate and up to date species list for the iSimangaliso Wetland Park. Data from this study were then analyzed to determine which water bodies had the most similar species composition. The Dragonfly Biotic Index (DBI) value of each study area was also determined. We recorded 68 odonate species in the iSimangaliso Wetland Park, adding 13 species to the Ezemvelo KwaZulu-Natal Wildlife database for the area. This brings the total number of Odonata species for the iSimangaliso Wetland Park to 86. Eight species are red-listed, 12 are restricted in South Africa to the coastal plains of northern KwaZulu-Natal, and the remainder occurs widely across the southern African savanna. Analyses indicate that species odonate assemblages were most similar in water bodies with comparable habitats. iSimangaliso Wetland Park is identified as an important area for Odonata diversity and endemism, a trend also reflected by the DBI values. Shifts in the existing species assemblages would indicate changes within the ecosystem and thus this species account provides necessary baseline data for the area. Species Conservation efforts should thus target water bodies of varying habitat types to protect greater species diversity.
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