Landscape-scale drivers of fish faunal homogenization and differentiation in the eastern United States

Peoples, Brandon K.; Davis, Amy; Midway, Stephen R.; Olden, Julian D.; Stoczynski, Lauren

doi:10.1007/s10750-019-04162-4

Cited by 22 publications

(26 citation statements)

References 77 publications

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“…In the sole paper addressing simultaneously taxonomic, functional and phylogenetic facets of biodiversity, Jia et al (2020) suggested that the homogenization of functional and phylogenetic components were strongest for the ichthyofauna of Yellow River, China. They demonstrated that despite increases in alpha diversity, beta diversity decreased over time (in agreement with Peoples et al, 2020), which reinforces that biodiversity should be used cautiously as an indicator of environmental wealth (Vellend, 2020). Related to the abovementioned idea, Simões et al (2020) emphasized the complexity of the BH phenomenon, given that taxonomic and functional diversity of Northeast and South Brazilian cladocerans may lead to different conclusions.…”

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confidence: 64%

“…In a large scale, Peoples et al (2020) reported the clearest evidence for BH across the eastern US, with an estimated fish faunal homogenization of 34% mean increase in pairwise community similarity. Their study comprised the longer time spam considering they used fauna dataset estimated before European settlements in America.…”

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confidence: 99%

“…Past investigations of BH have largely focused on reconstructed species pools from published lists of native, extinct, and/or nonnative species, thus limiting comparisons to be made between some ''historical'' baseline and the present day (Rosenblad & Sax, 2017). In this special issue, Jia et al (2020) used data from a 50-year period; Brito et al 2020and Lindholm et al (2020) examined data over a 70-year period; Kirk et al (2020) leveraged historical data starting in the 1890's; and Peoples et al (2020) used an estimation of original fish fauna in North America before European colonization. One paper examined patterns of community composition before and after major dam construction , and other 5 papers used data from c. 10-20 years, coinciding with popularization of longterm ecological programs and standard ecological assessments.…”

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Preface: aquatic homogenocene—understanding the era of biological re-shuffling in aquatic ecosystems

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Preface: aquatic homogenocene—understanding the era of biological re-shuffling in aquatic ecosystems

2020

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“…Our results evidenced the complexity and overwhelming invasion potential of the exotic species U. arrecta -the tropical tanner grass -on the native communities of macrophytes in a subtropical tidal river. A pattern of local increase in species richness and decrease in regional biodiversity is common as a result of biotic homogenization phenomenon driven by invasive species (e.g., Vellend 2010;Peoples et al 2020). Even so, previous papers considered variation within a watershed as a 'local-scale' analysis, and variation amongst watersheds as a 'regional scale' analysis (see Daga et al 2020;Peoples et al 2020).…”

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The invasive tropical tanner grass decreases diversity of the native aquatic macrophyte community at two scales in a subtropical tidal river

2021

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The tropical tanner grass, Urochloa arrecta, is one of the worst aquatic plant invaders in Brazilian freshwater ecosystems. This study aimed to compare beds of macrophytes dominated and without U. arrecta in the Guaraguaçu River, a subtropical tidal river in South Brazil, to analyze effects that this invasive grass has on the biodiversity of native macrophytes at two spatial scales. We compared macrophyte beds dominated by tanner grass to macrophyte beds without, considering species richness, composition, and beta diversity at two scales of variation: among-beds and within-beds. We expected that beds dominated by tanner grass would have lower biodiversity, thus promoting macrophyte biotic homogenization. Our results confirmed our hypotheses, highlighting the lower species richness in beds dominated by tanner grass. Species composition differed among beds. In general, nestedness among beds dominated by U. arrecta was more related to variation in species composition. Beds dominated by tanner grass had lower turnover and higher nestedness within beds. This study indicates a prominent sign of biotic homogenization promoted by U. arrecta, and highlights the degree of biotic homogenization among and within beds.

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“…(Olden & Poff, 2004; Scott & Helfman, 2001). Stream fish communities across the eastern U.S.A. have experienced significant homogenisation due to non‐native species introductions, and this process is correlated with numerous natural and anthropogenic factors (Peoples et al., 2020). Habitat alterations to rivers caused by dams can facilitate establishment of non‐native species (Clavero & Hermoso, 2011) and contribute to taxonomic homogenisation of riverine fish communities (Poff et al., 2007).…”

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Landscape features and study design affect elements of metacommunity structure for stream fishes across the eastern U.S.A.

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Metacommunity ecology includes connectivity in the investigation of local and regional processes to understand community assembly. The elements of metacommunity structure (EMS) framework classifies metacommunities into categorical archetypes based on patterns of three metrics indexing β diversity: coherence, turnover, and boundary clumping. Although the EMS framework is most commonly used to classify metacommunity types, an elements‐based approach of examining how factors affect each specific continuous EMS variable could provide a more mechanistic understanding of how metacommunities are structured at the landscape scale. Moreover, few studies have sought to quantify how methodological issues such as number and spacing of local communities affect observed outcomes of EMS‐based analyses. Using a large dataset of stream fish occurrences in the eastern U.S.A., we used mixed effects models to investigate how (1) landscape‐scale variables and (2) methodological issues such as number and location of sampling sites affect coherence, turnover, and boundary clumping individually; as well as (3) how landscape‐scale variables influence overall metacommunity patterns derived from the EMS framework. Coherence, turnover, and boundary clumping were related to temperature, density of dams, developed land use, and γ diversity. Interestingly, distance among sampled sites in metacommunities negatively affected turnover, and the number of sampling sites positively affected all three variables. Elevation affected overall observed metacommunity patterns, with metacommunities transitioning from Clementsian to clumped species loss patterns with increasing elevation. Our results suggest that metacommunity structure is affected by both natural and anthropogenic landscape‐scale variables. Observed metacommunity properties are also influenced by sampling density and site location within the catchment. Accounting for important natural, anthropogenic, and methodological issues will be critical for improving the inferential power of metacommunity analyses to begin understanding which landscape‐scale variables should be the focus of conservation and management of fish communities at a catchment scale.

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Landscape-scale drivers of fish faunal homogenization and differentiation in the eastern United States

Cited by 22 publications

References 77 publications

Preface: aquatic homogenocene—understanding the era of biological re-shuffling in aquatic ecosystems

Preface: aquatic homogenocene—understanding the era of biological re-shuffling in aquatic ecosystems

The invasive tropical tanner grass decreases diversity of the native aquatic macrophyte community at two scales in a subtropical tidal river

Landscape features and study design affect elements of metacommunity structure for stream fishes across the eastern U.S.A.

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