Habitat associations of riverine fishes among rocky shoals

Baynes, Anna Y.; Freeman, Mary C.; McKay, S. Kyle; Wenger, Seth J.

doi:10.1111/eff.12690

Cited by 3 publications

(3 citation statements)

References 46 publications

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“…Baynes et al. (2023) report a range of habitat specialization among fishes in Conasauga River shoals, however two of the three species they describe as generalists show declines in our analysis (i.e. Notropis xaenocephalus and Cyprinella callistia ).…”

Section: Discussioncontrasting

confidence: 55%

“…For example, fluvial specialist species may be more prone to declines than habitat generalists (Freeman & Marcinek, 2006;Kanno & Vokoun, 2010). Baynes et al (2023) report a range of habitat specialization among fishes in Conasauga River shoals, however two of the three species they describe as generalists show declines in our analysis (i.e. Notropis xaenocephalus and Cyprinella callistia).…”

Section: Discussionmentioning

confidence: 63%

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Life‐history connections to long‐term fish population trends in a species‐rich temperate river

Nagy,

Freeman,

Irwin

et al. 2024

Ecology of Freshwater Fish

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Fishes exhibit a diverse range of traits encompassing life‐history strategies, feeding behaviours and spawning behaviours. These traits mediate fish population responses to changing environmental conditions such as those caused by anthropogenic stressors. The Conasauga River, located in northwestern Georgia and southeastern Tennessee, USA, hosts a diverse assemblage of over 75 species of freshwater fish, some of which are locally or regionally endemic, and many of which are imperilled. Annual monitoring data have shown population declines in multiple fish species of conservation concern in the Conasauga River since at least the 1990s, raising the possibility that other taxa could be declining as well. We quantified temporal changes in fish communities at six shoal sites sampled annually in most years from 1996 to 2022, and asked whether species traits hypothesized to underlie population vulnerability to environmental alteration were correlated with species‐specific trends for 32 taxa. We estimated that total counts of fish in annual samples declined by ~2% per year, although declines were uneven among species and generally greater for less abundant taxa. Tests for species traits corresponding to temporal population trends provided evidence that crevice‐spawning minnows and smaller‐bodied taxa had steeper declines compared with broadcast spawners and larger, longer‐lived, more fecund taxa. Lower abundance, reliance on a particular habitat feature, and life‐history traits that may limit population resilience to disturbance may all prove useful for identifying riverine fishes at particular risk of future population decline.

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Section: Discussioncontrasting

confidence: 55%

Section: Discussionmentioning

confidence: 63%

Life‐history connections to long‐term fish population trends in a species‐rich temperate river

Nagy,

Freeman,

Irwin

et al. 2024

Ecology of Freshwater Fish

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show abstract

“…Boudreault et al (2021) used probability density functions to study Atlantic salmon in the Sainte Marguerite River (Quebec, Canada). Baynes et al (2023) used generalized linear multiple regression models to study fish species in the Conasauga River in Georgia, United States. Furthermore, the WUA parameter is also usually used to evaluate the habitat of fish.…”

mentioning

confidence: 99%

The impact of floods triggered by natural dam breakage on the adaptability of downstream river fish—the 2018 baige outburst flood in the upper reaches of the Yangtze river in China

Xie,

Jiang,

Wen

et al. 2024

Front. Earth Sci.

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Outburst floods can affect the survival adaptability of fish. Although the survival adaptability of many fish species under low steady-flow conditions has been studied, research on the survival adaptability of fish species under large outburst flood conditions is lacking. This paper takes the 2018 Baige landslide dam as an example. A breach model was developed to calculate the outburst discharge of the landslide dam. The outburst flood hydrograph is simulated with the breach model, which shows that the difference between the peak discharge of the dam break simulation results and the measured data is 0.13×104 m3/s. In addition, the simulated hydrographs are the same as the measured hydrographs. Furthermore, a two-dimensional fish habitat model was used to analyse the adaptability of Schizothorax to survival during the breaching process. For the survival adaptability of Schizothorax, we observed that as the flow rate increased the weighted usable area (WUA) decreased, which indicated a decrease in the adaptability of Schizothorax survival. In contrast, as the flow rate decreased and the WUA increased, the survival adaptability of Schizothorax improved. In addition, the WUA of Schizothorax changed with the substrate of the riverbed; the smaller the channel suitability index (CSI) the greater the WUA. This study revealed the impact of outburst floods triggered by landslide dam failure on the survival adaptability of Schizothorax, and a method for assessing the impact of outburst floods on fish habitat adaptability is provided.

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Justicia americana exhibits stem density–aboveground biomass relationships and variability in elemental composition and isotopic signature across tissue types and land use gradients

Wood,

Huff

2024

Botany

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Riverine macrophytes are increasingly understood to influence both the physical and chemical dynamics of rivers by creating biogeochemical hotspots and stabilizing benthic sediments. They contribute carbon and nutrients to both aquatic and adjacent terrestrial ecosystems through senescence and herbivory. Here we report the relationships between Justicia americana biomass, stem length and stem density, and % carbon (%C), % nitrogen (%N), C:N, δ15N and δ13C relationships between tissues types (roots, stems, and leaves). Additionally, we report the effects of land use on the plant’s tissue. We found that 1) J. americana stem density and dry biomass were positively correlated (P<0.001); 2) δ13C and % N were significantly different in leaf and root tissue; 3) δ13C and δ15N were both positively correlated across tissue types; 4) Leaf C:N was less than ½ of root and stem tissue; 5) % C in leaf tissue was positively correlated (P<0.05) with forest cover and negatively correlated with urbanization and watershed area; and 6) provide evidence that J. americana utilizes a C3 photosynthetic pathway. Overall, this study provides novel insight into the ecology of J. americana by elucidating the nutritional quality of different plant tissues and stoichiometric changes in the plant in response to land use.

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Habitat associations of riverine fishes among rocky shoals

Cited by 3 publications

References 46 publications

Life‐history connections to long‐term fish population trends in a species‐rich temperate river

Life‐history connections to long‐term fish population trends in a species‐rich temperate river

The impact of floods triggered by natural dam breakage on the adaptability of downstream river fish—the 2018 baige outburst flood in the upper reaches of the Yangtze river in China

Justicia americana exhibits stem density–aboveground biomass relationships and variability in elemental composition and isotopic signature across tissue types and land use gradients

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