Local and regional effects structuring aquatic insect assemblages at multiple spatial scales in a Mainland-Island region of the Atlantic Forest

Siegloch, Ana Emília; Silva, Aurea Luiza Lemes da; Silva, Pedro Giovâni da; Hernández, Malva Isabel Medina

doi:10.1007/s10750-017-3277-1

Cited by 13 publications

(13 citation statements)

References 53 publications

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“…These patterns are similar to our findings for taxon richness. However, the contribution of a component increased when the diversity partitioning was performed using the Shannon-Wiener index (Siegloch et al 2018), as we observed in our study. Unlike taxon richness, these findings indicate that the relative abundance of stream macroinvertebrates responds more than taxon richness to small-scale factors.…”

Section: Discussionsupporting

confidence: 79%

“…Surber samples). In a field study in Brazilian headwater streams, Siegloch et al (2018) found that sampling site, followed by ecoregion, was the spatial scales that mostly contributed to the total family richness in aquatic insects metacommunities. These patterns are similar to our findings for taxon richness.…”

Section: Discussionmentioning

confidence: 99%

“…Based on their approach, b diversity can be decomposed into two components: the species (SCBD) and local contribution to the beta diversity (LCBD). SCBD describes to which extent each species singularly affects the variation in b diversity within the community and has been tested in relation to various speciesspecific measure of ecological niche and habitat occupancy (Heino and Grönroos 2017;Siegloch et al 2018). By contrast, LCBD is a comparative indicator of the ecological uniqueness of sites.…”

Section: Introductionmentioning

confidence: 99%

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Contribution of beta diversity in shaping stream macroinvertebrate communities among hydro-ecoregions

Bo¹,

Doretto

Levrino

et al. 2020

Aquat Ecol

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Rivers are heterogeneous and patchy-structured systems in which regional biodiversity of aquatic communities typically varies as a function of local habitat conditions and spatial gradients. Understanding which environmental and spatial constraints shape the diversity and composition of benthic communities is therefore a pivotal challenge for basic and applied research in river ecology. In this study, benthic invertebrates were collected from 27 sites across three hydro-ecoregions with the aim of investigating patterns in α- and β diversity. We first assessed the contribution to regional biodiversity of different and nested spatial scales, ranging from micro-habitat to hydro-ecoregion. Then, we tested differences in α diversity, taxonomic composition and ecological uniqueness among hydro-ecoregions. Variance partitioning analysis was used to evaluate the mechanistic effects of environmental and spatial variables on the composition of macroinvertebrate communities. Macroinvertebrate diversity was significantly affected by all the spatial scales, with a differential contribution according to the type of metric. Sampling site was the spatial scale that mostly contributed to the total richness, while the micro-habitat level explained the largest proportion of variance in Shannon–Wiener index. We found significant differences in the taxonomic composition, with 39 invertebrate families significantly associated with one or two hydro-ecoregions. However, effects of environmental and spatial controls were context dependent, indicating that the mechanisms that promote beta diversity probably differ among hydro-ecoregions. Evidence for species sorting, due to natural areas and stream order, was observed for macroinvertebrate communities in alpine streams, while spatial and land-use variables played a weak role in other geographical contexts.

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Section: Discussionsupporting

confidence: 79%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Contribution of beta diversity in shaping stream macroinvertebrate communities among hydro-ecoregions

Bo¹,

Doretto

Levrino

et al. 2020

Aquat Ecol

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“…Second, the insular condition of the study region might have prevented the occurrence of more taxa. The richness of insect groups is related to spatial isolation in islands (Dennis et al, 2008), and the effects of increasing distances on dispersal limitation of many aquatic insects have been described in the literature (Ligeiro et al, 2010;Siegloch et al, 2018). In the study region, the original Atlantic Forest vegetation has been largely fragmented (Klein et al, 2006;Bisheimer et al, 2013), increasing dispersal limitation and contributing to reduced richness of aquatic insects like odonates.…”

Section: Inventory and Diversity Of Odonata In The Study Regionmentioning

confidence: 95%

Environmental drivers and composition of assemblages of immature odonates (Insecta) in a subtropical island in southern Brazil

et al. 2020

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Aim Describe the diversity of immature stages of Odonata (Insecta) in streams from a subtropical island in southern Brazil and investigate the influence of environmental variables on the composition of their assemblages. Methods Eleven low-order streams (1st to 3rd order) were sampled in two conservation units located in the island of Santa Catarina (southern Brazil) between 2010 and 2012. Immature specimens of Odonata were collected using a Surber sampler. The influence of water abiotic parameters and habitat structure (mesohabitats: riffle vs. pool areas, microhabitats: litter vs. stone substrates) on the composition of Odonata was tested through the seasons using ordination diagrams and redundancy analysis. Results Nine odonate genera from seven families were recorded in the study region. The genera Desmogomphus, Epigomphus (Gomphidae), Heteragrion (Heteragrionidae) and Perilestes (Perilestidae) have their first records described for the state of Santa Catarina. Additionally, biological notes are provided for other odonate genera concerning substrate use. The composition of Odonata communities changed over the seasons and they were influenced by water temperature and velocity. Additionally, odonate composition differed significantly between microhabitats (substrate type) and mesohabitats (riffle vs. pool areas) in the streams studied. Conclusions The lower genera richness of Odonata recorded in the island of Santa Catarina in relation to other Brazilian subtropical streams is probably associated with the insular condition of the study region. This study also demonstrated that substrate (organic and inorganic) and mesohabitat (riffle and pool) types were important drivers of the composition of the fauna of immature odonates, evidencing the role of climate and habitat structure in influencing subtropical stream insect communities.

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“…Some ecological processes and environmental factors are spatially structured; thus, spatial predictors should be taken into account when evaluating diversity patterns (da Silva & Hernández ; Siegloch et al . ). Spatial descriptors may represent missing environmental variables, biotic interactions, dispersal, or biogeographical events (Leibold et al .…”

Section: Introductionmentioning

confidence: 97%

Environmental drivers of species composition and functional diversity of dung beetles along the Atlantic Forest–Pampa transition zone

Silva

Cassenote

2019

Austral Ecology

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Human activities are causing a rapid loss of biodiversity, which impairs ecosystem functions and services. Therefore, understanding which processes shape how biodiversity is distributed along spatial and environmental gradients is a first step to guide conservation and management efforts. We aimed to determine the relative explanatory importance of biogeographic, environmental, landscape and spatial variables on assemblage dissimilarities and functional diversity of dung beetles along the Atlantic Forest-Pampa (i.e. forest-grassland) transition zone located in Southeast South America. We described each site according to their biogeographic position, environmental conditions, landscape features and spatial patterns. The compositional dissimilarity was partitioned into turnover and nestedness components of b-diversity. Mantel tests and generalised dissimilarity models were used to relate b-diversity and its components to biogeographic, environmental, landscape and spatial variables. Variation partitioning analysis was used to estimate the pure and shared variation in species composition and functional diversity explained by the four categories of predictors. Biome domain was the main factor causing dung beetle compositional dissimilarity, with a high species replacement between Atlantic Forest and Pampa. Biogeographic, environmental, landscape and spatial distances also affected the patterns of dung beetle dissimilarity and b-diversity components. The shared effects of the four sets of predictors explained most of the variation in dung beetle composition. A similar response pattern was found for dung beetle functional diversity, which excluded biogeographic effects. Only the pure effects of environmental and spatial predictors were significant for species composition and functional diversity. Our results indicate that dung beetle species composition and functional diversity are jointly driven by environmental, landscape and spatial predictors with higher pure environmental and spatial effects. The forest-grassland transition zone promotes a strong species and trait replacement highly influenced both by environmental filtering and dispersal limitation. Land cover configurationThe land cover conditions around sites (1 km radii circular sectors) were obtained from high-resolution satellite images

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Local and regional effects structuring aquatic insect assemblages at multiple spatial scales in a Mainland-Island region of the Atlantic Forest

Cited by 13 publications

References 53 publications

Contribution of beta diversity in shaping stream macroinvertebrate communities among hydro-ecoregions

Contribution of beta diversity in shaping stream macroinvertebrate communities among hydro-ecoregions

Environmental drivers and composition of assemblages of immature odonates (Insecta) in a subtropical island in southern Brazil

Environmental drivers of species composition and functional diversity of dung beetles along the Atlantic Forest–Pampa transition zone

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