2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/21/2019 | 2:15 PM - 2:30 PM | THE IMPACT OF GENOTYPIC VS. ENVIRONMENTAL VARIATION IN LEAF LITTER ON AQUATIC COMMUNITY ASSEMBLAGE AND DECOMPOSITION | 151 ABC
THE IMPACT OF GENOTYPIC VS. ENVIRONMENTAL VARIATION IN LEAF LITTER ON AQUATIC COMMUNITY ASSEMBLAGE AND DECOMPOSITION
The genotype of a foundation species can affect the survival and abundance of other species. For example, studies have shown intraspecific genetic variation in cottonwoods produces community- and ecosystem-level effects; however, it is unknown exactly how these extended phenotypes will respond to changed environmental conditions. Because Cottonwood litter forms an important energy link between terrestrial and aquatic systems, we sought to quantify the extent to which variation in leaf litter traits, aquatic litter decomposition rates, and aquatic invertebrate community assemblage is due to genetic vs. environmental effects. We collected litter from Populus fremontii growing in common gardens planted across an elevational gradient and placed it in a mid-range stream to measure decomposition rates and colonization by aquatic invertebrates. We found that leaf litter traits and decomposition were strongly affected by an interaction between population and garden, while aquatic invertebrate communities were strongly influenced by garden effect. Our results indicate that genotype by environment interactions can have a major influence on the extended phenotypic effects of a foundation tree species, shifting our ability to predict the ecological roles particular genotypes or source populations will play when planted into new environments.
- Decomposition
- Genetics
- Riparian
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Presenters/Authors
Joann Jeplawy
(), Northern Arizona University, jrj295@nau.edu;
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Jane Marks
(), Northern Arizona University, jane.marks@nau.edu;
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Thomas Whitham
(), Northern Arizona University, Thomas.Whitham@nau.edu;
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Gerard Allan
(), Northern Arizona University, gery.allan@nau.edu;
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Rebecca Best
(), Northern Arizona University, rebecca.best@nau.edu;
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