Thermal traits of freshwater macroinvertebrates vary with feeding group and phylogeny

Functional traits of organisms, especially feeding traits, influence how organisms mediate ecosystem processes. As climate change, landscape modification and industrial waste heat release continue to increase water temperatures, shifts in the composition of feeding traits within aquatic macroinverte...

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Bibliographic Details
Published in:Freshwater biology 2022-11, Vol.67 (11), p.1994-2003
Main Authors: Tomczyk, Nathan J., Rosemond, Amy D., Rogers, Phoenix A., Cummins, Carolyn S.
Format: Article
Language:English
Subjects:
Aquatic ecosystems
Aquatic insects
Climate change
critical thermal maxima
Evaluation
Feeding
Freshwater
Heat transfer
Herbivores
Industrial wastes
Inland water environment
Insects
Low temperature
Macroinvertebrates
Maxima
Office equipment
Phylogenetics
Phylogeny
Predators
Shredding
temperature preference
Temperature preferences
temperature sensitivity
upper lethal temperature
Variation
Water purification
Water temperature
Zoobenthos
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Summary:Functional traits of organisms, especially feeding traits, influence how organisms mediate ecosystem processes. As climate change, landscape modification and industrial waste heat release continue to increase water temperatures, shifts in the composition of feeding traits within aquatic macroinvertebrate communities may alter ecosystem processes. However, it is unclear whether thermal traits of macroinvertebrates vary systematically across functional feeding groups (FFGs; i.e., categories based on feeding ecology such as herbivores, shredders, predators, etc.) or phylogeny. We used previously published datasets on hundreds of macroinvertebrate taxa to evaluate how thermal traits differed across FFGs. We also examined the strength of phylogenetic signal in both FFG and thermal traits, using a new phylogeny of insect taxa. Then, we tested whether phylogenetic patterns offered a plausible explanation for differences in thermal traits among FFGs by comparing phylogenetic and non‐phylogenetic regressions. Shredders tended to have lower temperature preferences, optima and maxima (three of five of the thermal traits evaluated) than other FFGs. Patterns for other FFGs differed by thermal trait, but predators, collector‐gatherers and filterers had some of the highest thermal trait values. FFG explained 40% of the variation in critical thermal maximum, but
ISSN:0046-5070
1365-2427
DOI:10.1111/fwb.13992