Biogeographic classification of streams using fish community– and trait–environment relationships

Troia, Matthew J.; McManamay, Ryan A.

doi:10.1111/ddi.13001

Cited by 15 publications

(6 citation statements)

References 72 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We would therefore recommend that conservation practices within the Chao Phraya catchment ensure representative sites from each of these two strongly supported optimal clusters are included in order to protect the two distinct communities. Being able to separate the sites into clusters is fundamental to identify areas of conservation priority 49 , 50 . The four-cluster solution indicates a fine-scale sub-structuring of the North East cluster, whereas the South-West cluster remains a single cluster (Fig.…”

Section: Discussionmentioning

confidence: 99%

Mapping biodiversity hotspots of fish communities in subtropical streams through environmental DNA

Blackman

Osathanunkul

Brantschen

et al. 2021

Sci Rep

View full text Add to dashboard Cite

Large tropical and subtropical rivers are among the most biodiverse ecosystems worldwide, but also suffer from high anthropogenic pressures. These rivers are hitherto subject to little or no routine biomonitoring, which would be essential for identification of conservation areas of high importance. Here, we use a single environmental DNA multi-site sampling campaign across the 200,000 km2 Chao Phraya river basin, Thailand, to provide key information on fish diversity. We found a total of 108 fish taxa and identified key biodiversity patterns within the river network. By using hierarchical clustering, we grouped the fish communities of all sites across the catchment into distinct clusters. The clusters not only accurately matched the topology of the river network, but also revealed distinct groups of sites enabling informed conservation measures. Our study reveals novel opportunities of large-scale monitoring via eDNA to identify relevant areas within whole river catchments for conservation and habitat protection.

show abstract

Section: Discussionmentioning

confidence: 99%

Mapping biodiversity hotspots of fish communities in subtropical streams through environmental DNA

Blackman

Osathanunkul

Brantschen

et al. 2021

Sci Rep

View full text Add to dashboard Cite

show abstract

“…For each functional categorization, an among-sites matrix was constructed with the Bray-Curtis similarity index. Log 10 -transformed catchment size was included as a covariate because species differences in trophic guilds, tolerances, and habitat preferences are expected to change with increasing stream size [45], but subbasin was not included as a covariate since analysis of functional guilds generalizes species' identity to their traits, which allows for community comparisons between areas that are geographically distant [46]. PRIMER-E version 7 software [45] was used for all analyses.…”

Section: Discussionmentioning

confidence: 99%

Impact of Dams on Stream Fish Diversity: A Different Result

et al. 2023

View full text Add to dashboard Cite

Impoundments can drastically change the physical and biological characteristics of fluvial systems. Changes in the physical characteristics, such as reductions in flow, increased sediment deposition, and increased surface area, often influence the system’s biological components, including plant, macroinvertebrate, and fish assemblages. In addition to having direct effects on impounded waterbodies, impoundments can also have wide-ranging effects at the watershed scale, particularly on upstream tributary streams. The purpose of this study was to assess the magnitude of these effects. We analyzed historical data from 26 streams distributed across five sub-basins in the Bluff Hills region of the Yazoo Basin, MS, USA. All five major tributary rivers in this region are impounded by large (11,240–26,143 hectares) reservoirs for flood control. We compared fish assemblages in streams located upstream and downstream of the four reservoirs using PERMANOVA, and contrary to expectations, we found no significant differences between the upstream and downstream assemblages. We explore several possible explanations for this discrepancy and suggest that stream assemblage response to impoundment may be nuanced by the regional species pool, the history of stream conditions in the watershed, and the resistance of the streams to periodic disturbances.

show abstract

“…Choosing appropriate functional traits can provide valuable insights into the relationships between environmental changes, fish functional diversity, and ecosystems (Troia & McManamay, 2020 ; Villéger et al, 2017 ). As habitat alteration and fragmentation associated with low‐head dams can potentially affect habitat guilds and trophic structures of fish assemblages in headwater streams (Fencl et al, 2017 ; Helms et al, 2011 ; Smith et al, 2017 ), we estimated the functional diversity of each community by measuring the most commonly available traits of fish species related to feeding, locomotion, and habitat preferences (Albouy et al, 2011 ).…”

Section: Methodsmentioning

confidence: 99%

Low‐head dams induce biotic homogenization/differentiation of fish assemblages in subtropical streams

Zhang

Wang

et al. 2022

Ecology and Evolution

View full text Add to dashboard Cite

Extensive distribution of widespread species and the loss of native species driven by anthropogenic disturbances modify community similarity, resulting in a decrease or increase in community distinctiveness. Data from four basins in the Wannan Mountains, China, were used to evaluate the effects of low‐head dams on patterns of fish faunal homogenization and differentiation based on abundance data. We aimed to examine the spatial changes in taxonomic and functional similarities of fish assemblages driven by low‐head dams and to examine whether the changes in the similarity of fish assemblages differed between taxonomic and functional components. We found that low‐head dams significantly decreased the mean taxonomic similarity but increased the mean functional similarity of fish assemblages in impoundments using abundance‐based approaches, suggesting that taxonomic differentiation accompanied functional homogenization in stream fish assemblages. These results show the importance of population abundance in structuring fish faunal homogenization and differentiation at small scales, especially when the major differences among assemblages are in species abundance ranks rather than species identities. Additionally, we also found only a weak positive correlation between changes in mean taxonomic and functional similarities, and partial pairs exhibited considerable variation in patterns of fish faunal homogenization and differentiation for taxonomic and functional components. In conclusion, this study highlighted that the observed taxonomic differentiation of current fish assemblages (short‐term phenomenon) is probably an early warning sign of further homogenization in regions where native species are completely predominated and that changes in taxonomic similarity cannot be used to predict changes in functional similarity.

show abstract

Biogeographic classification of streams using fish community– and trait–environment relationships

Cited by 15 publications

References 72 publications

Mapping biodiversity hotspots of fish communities in subtropical streams through environmental DNA

Mapping biodiversity hotspots of fish communities in subtropical streams through environmental DNA

Impact of Dams on Stream Fish Diversity: A Different Result

Low‐head dams induce biotic homogenization/differentiation of fish assemblages in subtropical streams

Contact Info

Product

Resources

About