EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
6/05/2017 | 9:30 AM - 9:45 AM | PATTERNS OF MACROINVERTEBRATE DIVERSITY ASSOCIATED WITH PERIPHYTIC ALGAE ON LEAF DEBRIS UNDER CONTRASTING LIGHT AND NUTRIENT CONDITIONS | 306A
PATTERNS OF MACROINVERTEBRATE DIVERSITY ASSOCIATED WITH PERIPHYTIC ALGAE ON LEAF DEBRIS UNDER CONTRASTING LIGHT AND NUTRIENT CONDITIONS
Forested temperate headwater streams are supported energetically by the breakdown of leaf debris by heterotrophic microbes and macroinvertebrate shredders. Recent work, however, has indicated algae on leaf debris may contribute to leaf breakdown and shredder nutrition. It is therefore likely that leaf-associated algae may be involved in other aspects of trophic dynamics in headwater streams. We performed a manipulative light experiment in six streams (three low and three high nutrient concentrations) by exposing red maple leaf packs (Acer rubrum) to either ambient or shaded light conditions for four weeks (n=5/light treatment/stream) in winter 2017 to examine the relationship between macroinvertebrate diversity and algal colonization. Macroinvertebrate functional and taxonomic diversity, algal biomass (chlorophyll-a), and leaf stoichiometry (C:N:P) were measured for each leaf pack. Chlorophyll-a averaged (±SE) 0.79±0.29, 0.31±0.05, 1.74±0.54, and 0.65±0.26 mg/m2 on low nutrient-ambient, low nutrient-shaded, high nutrient-ambient, and high nutrient-shaded leaf packs, respectively. Results regarding macroinvertebrate diversity in relation to algal biomass will be discussed.
- C25 Food Webs
- C03 Invertebrates
- C31 Organic Matter Processing
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Presenters/Authors
Rebecca Eckert
(), University of Maryland, reckert@umd.edu;
ASHA DISCLOSURE:
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Nonfinancial -
William Lamp
(), University of Maryland, lamp@umd.edu;
ASHA DISCLOSURE:
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Nonfinancial -