scholarly journals Different roles of elevational and local environmental factors on abundance-based beta diversity of the soil Enchytraeidae on the Changbai Mountain

2019 ◽  
Vol 9 (4) ◽  
pp. 2180-2188 ◽  
Author(s):  
Xiaoming Jiang ◽  
Jing Chen ◽  
Zhicai Xie
Keyword(s):  
Environmental Factors ◽  
Beta Diversity ◽  
Changbai Mountain

scholarly journals Taxonomic and phylogenetic beta diversity in headwater stream fish communities of the Paraná and Paraguai River basins

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Gabriel Nakamura ◽  
Wagner Vicentin ◽  
Yzel Rondon Súarez
Keyword(s):  
Environmental Factors ◽  
Beta Diversity ◽  
Environmental Gradients ◽  
Fish Communities ◽  
River Basins ◽  
Water Velocity ◽  
Headwater Stream ◽  
Stream Fish ◽  
Evolutionary Mechanisms ◽  
Species Sorting

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).

Mixed Evidence for Biotic Homogenization of Southern Appalachian Fish Communities

2021 ◽  
Author(s):  
Kelly N. Petersen ◽  
Mary C. Freeman ◽  
Joseph E Kirsch ◽  
William O McLarney ◽  
Mark C Scott ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Relative Abundance ◽  
Endemic Species ◽  
Beta Diversity ◽  
Anthropogenic Impacts ◽  
Fish Communities ◽  
Biotic Homogenization ◽  
Cosmopolitan Species ◽  
Southern Appalachian ◽  
Over Time

Anthropogenic impacts on the landscape can drive biotic homogenization, whereby distinct biological communities become more similar to one another over time. Land-use change in the Southern Appalachian region is expected to result in homogenization of the highly diverse freshwater fish communities as in-stream habitat alterations favor widespread cosmopolitan species at the expense of more narrowly distributed highland endemic species. We compiled four datasets spanning 25 years to (1) evaluate the effects of environmental factors on relative abundance and richness of highland endemic vs. cosmopolitan species in this region and (2) test for taxonomic homogenization, measured as a change in beta diversity over time. We found that several environmental factors differentially affected highland endemic and cosmopolitan species, with the proportion of forested land cover in a watershed most strongly predicting higher relative abundance and richness of highland endemic species. Our analysis of beta diversity change, however, shows mixed evidence of taxonomic homogenization, depending on how common species are weighted. Shifts in community composition, with or without homogenization, may warrant attention in biodiversity conservation planning.

Local environmental factors influence beta‐diversity patterns of tropical fish assemblages more than spatial factors

Ecology ◽  
2019 ◽  
Vol 101 (2) ◽  
Author(s):  
Edwin O. López‐Delgado ◽  
Kirk O. Winemiller ◽  
Francisco A. Villa‐Navarro
Keyword(s):  
Environmental Factors ◽  
Beta Diversity ◽  
Fish Assemblages ◽  
Tropical Fish ◽  
Spatial Factors ◽  
Diversity Patterns

scholarly journals How beta diversity and the underlying causes vary with sampling scales in the Changbai mountain forests

2017 ◽  
Vol 7 (23) ◽  
pp. 10116-10123 ◽  
Author(s):  
Lingzhao Tan ◽  
Chunyu Fan ◽  
Chunyu Zhang ◽  
Klaus von Gadow ◽  
Xiuhua Fan
Keyword(s):  
Beta Diversity ◽  
Changbai Mountain ◽  
Mountain Forests ◽  
Underlying Causes
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