Effects of Introduced Small Wood in a Degraded Stream on Fish Community and Functional Diversity

2018 ◽  
Vol 17 (1) ◽  
pp. 74-94 ◽  
Author(s):  
Ken A. Sterling ◽  
Melvin L. Warren
Keyword(s):  
Functional Diversity ◽  
Fish Community ◽  
Small Wood

scholarly journals Functional Diversity of the Fish Community Associated to Soft-Bottoms in the Lagoon of La Paz B.C.S., México

2020 ◽  
Vol 10 (04) ◽  
pp. 233-244
Author(s):  
Hernandez-Villasana Carlos Samuel ◽  
Barjau-González Emelio ◽  
López-Vivas Juan Manuel ◽  
Armenta-Quintana José Angel ◽  
Suárez-Villavicencio Jaime
Keyword(s):  
Functional Diversity ◽  
Fish Community ◽  
La Paz ◽  
Soft Bottoms

Environmental drivers of fish functional diversity and composition in the Lower Colorado River Basin

2010 ◽  
Vol 67 (11) ◽  
pp. 1791-1807 ◽  
Author(s):  
Thomas K. Pool ◽  
Julian D. Olden ◽  
Joanna B. Whittier ◽  
Craig P. Paukert
Keyword(s):  
Life History ◽  
River Basin ◽  
Functional Diversity ◽  
Native Species ◽  
Fish Community ◽  
Colorado River ◽  
Colorado River Basin ◽  
Environmental Drivers ◽  
Lower Colorado River Basin ◽  
Lower Colorado River

Freshwater conservation efforts require an understanding of how natural and anthropogenic factors shape the present-day biogeography of native and non-native species. This knowledge need is especially acute for imperiled native fishes in the highly modified Lower Colorado River Basin (LCRB), USA. In the present study we employed both a taxonomic and functional approach to explore how natural and human-related environmental drivers shape landscape-scale patterns of fish community composition in the LCRB. Our results showed that hydrologic alteration, watershed land use, and regional climate explained 30.3% and 44.7% of the total variation in fish community taxonomic and functional composition, respectively. Watersheds with greater dam densities and upstream storage capacity supported higher non-native functional diversity, suggesting that dams have provided additional “niche opportunities” for non-native equilibrium life-history strategists by introducing new reservoir habitat and modifying downstream flow and thermal regimes. By contrast, watersheds characterized by greater upstream land protection, lower dam densities, and higher variation in spring and summer precipitation supported fish communities with a strong complement of native species (opportunistic–periodic strategists). In conclusion, our study highlights the utility of a life-history approach to better understand the patterns and processes by which fish communities vary along environmental gradients.

scholarly journals Functional diversity in a marine fish community

2009 ◽  
Vol 66 (5) ◽  
pp. 791-796 ◽  
Author(s):  
Dian J. Gifford ◽  
Jeremy S. Collie ◽  
John H. Steele
Keyword(s):  
Functional Diversity ◽  
Marine Fish ◽  
Fish Community ◽  
Food Limitation ◽  
Fishing Effort ◽  
Individual Species ◽  
Fish Community Structure ◽  
Nutrient Input ◽  
State Budget ◽  
External Stresses

Abstract Gifford, D. J., Collie, J. S., and Steele, J. H. 2009. Functional diversity in a marine fish community. – ICES Journal of Marine Science, 66: 791–796. Calculations of fluxes in an end-to-end foodweb linear steady-state budget model are used to estimate constraints on the Georges Bank fish community that operate through decade-scale changes in nutrient input and fishing effort. The effects of these constraints are described in terms of fish functional groups and species diversity, and compensatory responses in fish community structure are considered. It is concluded that the overall fish community, rather than individual species, is resilient to external stresses imposed by combined fishing pressure and food limitation.

scholarly journals How fish traits and functional diversity respond to environmental changes and species invasion in the largest river in Southeastern China

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e11824
Author(s):  
Li Lin ◽  
Weide Deng ◽  
Xiaoxia Huang ◽  
Yang Liu ◽  
Liangliang Huang ◽  
...  
Keyword(s):  
Community Structure ◽  
Environmental Factors ◽  
Freshwater Fish ◽  
Functional Diversity ◽  
Community Assembly ◽  
Fish Community ◽  
Fish Community Structure ◽  
Species Invasion ◽  
Southeastern China ◽  
Functional Richness

Background Freshwater fish populations are facing multiple stressors, including climate change, species invasion, and anthropogenic interference. Temporal studies of fish functional diversity and community assembly rules based on trait-environment relationships provide insights into fish community structure in riverine ecosystems. Methods Fish samples were collected in 2015 in the Min River, the largest freshwater riverine system in Southeastern China. Fish functional diversity was compared with the background investigation in 1979. Changes in functional richness, functional evenness, functional divergence, and functional beta diversity were analyzed. Relationships between functional diversity and environmental factors were modeled by random forest regression. Correlations between fish functional traits and environmental factors were detected by fourth-corner combined with RLQ analysis. Results Functional richness was significantly reduced in 2015 compared with 1979. Functional beta diversity in 2015 was significantly higher than that in 1979, with functional nestedness being the driving component. Reduction of functional richness and domination of functional nestedness is associated with species loss. Trait convergence was the dominant mechanism driving the temporal changes of functional diversity. Precipitation, temperature, species invasion, and human population were the most significant factors driving fish functional diversity. Higher precipitation, higher temperature, and presence of invasive species were significantly associated with higher swimming factor and higher relative eye diameter, while the opposite environmental conditions were significantly associated with higher pectoral fin length and eurytopic water flow preference. Conclusions Environmental filtering is the dominant temporal assembly mechanism shaping fish community structure. This work contributes to the understanding of temporal freshwater fish community assembly and the associations between fish functional structure and local environmental conditions, which will be informative for future freshwater fish conservation.

Biological invasions undermine the functional diversity of fish community in a large subtropical river

2018 ◽  
Vol 20 (10) ◽  
pp. 2981-2996 ◽  
Author(s):  
Fangmin Shuai ◽  
Sovan Lek ◽  
Xinhui Li ◽  
Tian Zhao
Keyword(s):  
Biological Invasions ◽  
Functional Diversity ◽  
Fish Community

scholarly journals Functional diversity of the Barents Sea fish community

2014 ◽  
Vol 495 ◽  
pp. 205-218 ◽  
Author(s):  
MA Wiedmann ◽  
M Aschan ◽  
G Certain ◽  
A Dolgov ◽  
M Greenacre ◽  
...  
Keyword(s):  
Functional Diversity ◽  
Fish Community ◽  
Barents Sea ◽  
The Barents Sea ◽  
Sea Fish

Dominance determines fish community biomass in a temperate seagrass ecosystem

2019 ◽  
Author(s):  
Aaron Matthius Eger ◽  
Rebecca J. Best ◽  
Julia Kathleen Baum
Keyword(s):  
Species Richness ◽  
Ecosystem Function ◽  
Fish Community ◽  
Prey Capture ◽  
Fish Communities ◽  
Functional Trait ◽  
Ecosystem Functions ◽  
Community Biomass ◽  
Ecosystem Valuation ◽  
Species Abundances

Biodiversity and ecosystem function are often correlated, but there are multiple hypotheses about the mechanisms underlying this relationship. Ecosystem functions such as primary or secondary production may be maximized by species richness, evenness in species abundances, or the presence or dominance of species with certain traits. Here, we combined surveys of natural fish communities (conducted in July and August, 2016) with morphological trait data to examine relationships between diversity and ecosystem function (quantified as fish community biomass) across 14 subtidal eelgrass meadows in the Northeast Pacific (54° N 130° W). We employed both taxonomic and functional trait measures of diversity to investigate if ecosystem function is driven by species diversity (complementarity hypothesis) or by the presence or dominance of species with particular trait values (selection or dominance hypotheses). After controlling for environmental variation, we found that fish community biomass is maximized when taxonomic richness and functional evenness is low, and in communities dominated by species with particular trait values – those associated with benthic habitats and prey capture. While previous work on fish communities has found that species richness is positively correlated with ecosystem function, our results instead highlight the capacity for regionally prevalent and locally dominant species to drive ecosystem function in moderately diverse communities. We discuss these alternate links between community composition and ecosystem function and consider their divergent implications for ecosystem valuation and conservation prioritization.

Fish community structure, habitat complexity, and soundscape characteristics of patch reefs in a tropical, back-reef system

2019 ◽  
Vol 609 ◽  
pp. 33-48 ◽  
Author(s):  
RP Lyon ◽  
DB Eggleston ◽  
DR Bohnenstiehl ◽  
CA Layman ◽  
SW Ricci ◽  
...  
Keyword(s):  
Community Structure ◽  
Habitat Complexity ◽  
Fish Community ◽  
Back Reef ◽  
Fish Community Structure ◽  
Patch Reefs ◽  
Reef System
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