Do fishes enjoy the view? A MaxEnt assessment of fish habitat suitability within scenic rivers

McGarvey, Daniel J.; Brown, Alexander L.; Chen, Elsa B.; Viverette, Catherine; Tuley, Philip A.; Latham, Olivia C.; Gibbs, Phillip M; Richins, Allyson E.; Deadwyler, Michelle C.; Lin, Baron; Kaseloo, Erik A.

doi:10.1016/j.biocon.2021.109357

Cited by 10 publications

(2 citation statements)

References 63 publications

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“…The correlations between the biological condition of rivers and the indicators of anthropogenic alterations showed that measures aimed at improving terrestrial and aquatic ecosystems (such as increased natural forest, where it existed, and freshwater protected areas) can be effective in improving the biological condition of rivers (see McGarvey et al, 2021 ). Indeed, up to now inland waters remain poorly represented in protected areas namely in Europe (EEA, 2020 ) and Australia and previous studies showed that the protection measures strictly focused on terrestrial systems confer little benefit to freshwater species (Chessman, 2013 ; Leal et al, 2020 ).…”

Section: Discussionmentioning

confidence: 99%

Fish and macroinvertebrate assemblages reveal extensive degradation of the world's rivers

Feio

Hughes

Serra

et al. 2022

Global Change Biology

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Rivers suffer from multiple stressors acting simultaneously on their biota, but the consequences are poorly quantified at the global scale. We evaluated the biological condition of rivers globally, including the largest proportion of countries from the Global South published to date. We gathered macroinvertebrate‐ and fish‐based assessments from 72,275 and 37,676 sites, respectively, from 64 study regions across six continents and 45 nations. Because assessments were based on differing methods, different systems were consolidated into a 3‐class system: Good, Impaired, or Severely Impaired, following common guidelines. The proportion of sites in each class by study area was calculated and each region was assigned a Köppen‐Geiger climate type, Human Footprint score (addressing landscape alterations), Human Development Index (HDI) score (addressing social welfare), % rivers with good ambient water quality, % protected freshwater key biodiversity areas; and % of forest area net change rate. We found that 50% of macroinvertebrate sites and 42% of fish sites were in Good condition, whereas 21% and 29% were Severely Impaired, respectively. The poorest biological conditions occurred in Arid and Equatorial climates and the best conditions occurred in Snow climates. Severely Impaired conditions were associated (Pearson correlation coefficient) with higher HDI scores, poorer physico‐chemical water quality, and lower proportions of protected freshwater areas. Good biological conditions were associated with good water quality and increased forested areas. It is essential to implement statutory bioassessment programs in Asian, African, and South American countries, and continue them in Oceania, Europe, and North America. There is a need to invest in assessments based on fish, as there is less information globally and fish were strong indicators of degradation. Our study highlights a need to increase the extent and number of protected river catchments, preserve and restore natural forested areas in the catchments, treat wastewater discharges, and improve river connectivity.

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Section: Discussionmentioning

confidence: 99%

Fish and macroinvertebrate assemblages reveal extensive degradation of the world's rivers

Feio

Hughes

Serra

et al. 2022

Global Change Biology

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“…We assigned species into FGs and assumed that species within the same FG would share more similar traits and, thus, be more likely to respond similarly to global change stressors. Although there is likely considerable within‐FG variation in species responses to global change, the value of this approach is that it can allow some generalization from predictions made from well‐sampled species to less sampled species (Hendrick & McGarvey, 2019; McGarvey et al, 2021; Woods & McGarvey, 2022).…”

Section: Methodsmentioning

confidence: 99%

Observed and projected functional reorganization of riverine fish assemblages from global change

Woods

Freeman

Krause

et al. 2023

Global Change Biology

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Climate and land‐use/land‐cover change (“global change”) are restructuring biodiversity, globally. Broadly, environmental conditions are expected to become warmer, potentially drier (particularly in arid regions), and more anthropogenically developed in the future, with spatiotemporally complex effects on ecological communities. We used functional traits to inform Chesapeake Bay Watershed fish responses to future climate and land‐use scenarios (2030, 2060, and 2090). We modeled the future habitat suitability of focal species representative of key trait axes (substrate, flow, temperature, reproduction, and trophic) and used functional and phylogenetic metrics to assess variable assemblage responses across physiographic regions and habitat sizes (headwaters through large rivers). Our focal species analysis projected future habitat suitability gains for carnivorous species with preferences for warm water, pool habitats, and fine or vegetated substrates. At the assemblage level, models projected decreasing habitat suitability for cold‐water, rheophilic, and lithophilic individuals but increasing suitability for carnivores in the future across all regions. Projected responses of functional and phylogenetic diversity and redundancy differed among regions. Lowland regions were projected to become less functionally and phylogenetically diverse and more redundant while upland regions (and smaller habitat sizes) were projected to become more diverse and less redundant. Next, we assessed how these model‐projected assemblage changes 2005–2030 related to observed time‐series trends (1999–2016). Halfway through the initial projecting period (2005–2030), we found observed trends broadly followed modeled patterns of increasing proportions of carnivorous and lithophilic individuals in lowland regions but showed opposing patterns for functional and phylogenetic metrics. Leveraging observed and predicted analyses simultaneously helps elucidate the instances and causes of discrepancies between model predictions and ongoing observed changes. Collectively, results highlight the complexity of global change impacts across broad landscapes that likely relate to differences in assemblages' intrinsic sensitivities and external exposure to stressors.

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Efficacy of species distribution models (SDMs) for ecological realms to ascertain biological conservation and practices

Rathore

Sharma

2023

Biodivers Conserv

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Do fishes enjoy the view? A MaxEnt assessment of fish habitat suitability within scenic rivers

Cited by 10 publications

References 63 publications

Fish and macroinvertebrate assemblages reveal extensive degradation of the world's rivers

Fish and macroinvertebrate assemblages reveal extensive degradation of the world's rivers

Observed and projected functional reorganization of riverine fish assemblages from global change

Efficacy of species distribution models (SDMs) for ecological realms to ascertain biological conservation and practices

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