A Tale of Two Sylamores: Understanding Relationships Among Land Use, Nutrients, and Aquatic Communities Across a Subsidy-Stress Gradient

Braund, Danielle; Feltmann, Andrew; Gavrielides, George; Lang, Katherine; Main, Jennifer R; Mogilevski, Anastasia; Mosbey, Justin; Zemun, Relić, R.R., Poljoprivredni fakultet, Beograd; Rezac, Calvin; Trejo, Brianna K.; Adams, Ginny L.; Adams, Sally

doi:10.54119/jaas.2019.7316

Arkansas Academy of Science

2019

DOI: 10.54119/jaas.2019.7316

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A Tale of Two Sylamores: Understanding Relationships Among Land Use, Nutrients, and Aquatic Communities Across a Subsidy-Stress Gradient

Danielle Braund

Andrew Feltmann

George Gavrielides

et al.

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Taxonomic and functional homogenization of fish assemblages in an Ozark river associated with pasture land use and constructed water bodies

Morrill,

Main,

Davenport

et al. 2024

Ecology of Freshwater Fish

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Comparisons between contemporary and historic surveys are useful in assessing how fish assemblages respond to anthropogenic stressors. When these stressors degrade aquatic environments, assemblages often experience biotic homogenization. The Strawberry River flows through the Ozarks of northern Arkansas and has been subject to both pasture land use conversion and constructed waterbodies which can degrade aquatic environments and alter fish assemblages. We investigated how fish assemblages in the Strawberry River have changed over a 35‐year time span in response to pasture land use and constructed waterbodies. We found evidence of both taxonomic and functional homogenization of fish assemblages from the mid‐1980s to 2019. This shift towards homogenization was primarily driven by increases in both site occurrence and abundance of generalist centrarchid species (associated with land use practices) and headwater specialist species (likely related to increased intermittency upstream). We created a composite variable using principal component analysis that represented pasture land use and constructed water body metrics because of their close relationship with each other. We found evidence of early functional differentiation associated with this composite variable; however, we found that over time fish assemblages ultimately experienced greater levels of homogenization associated with this same variable. This pattern of biotic homogenization associated with species additions suggests the Strawberry River is at a tipping point along a subsidy stress gradient, and in the future, we expect to see losses of specialist endemic species if conservation actions are not taken.

show abstract

Taxonomic and functional homogenization of fish assemblages in an Ozark river associated with pasture land use and constructed water bodies

Morrill,

Main,

Davenport

et al. 2024

Ecology of Freshwater Fish

View full text Add to dashboard Cite

show abstract

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A Tale of Two Sylamores: Understanding Relationships Among Land Use, Nutrients, and Aquatic Communities Across a Subsidy-Stress Gradient

Cited by 1 publication

References 0 publications

Taxonomic and functional homogenization of fish assemblages in an Ozark river associated with pasture land use and constructed water bodies

Taxonomic and functional homogenization of fish assemblages in an Ozark river associated with pasture land use and constructed water bodies

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