2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/21/2018 | 12:00 PM - 12:15 PM | ESTIMATING QUALITATIVE FOOD WEB STRUCTURE FROM BIOMONITORING AND LITERATURE-BASED DIET DATA TO DETECT CHANGES IN ECOSYSTEM FUNCTION | 420 A
ESTIMATING QUALITATIVE FOOD WEB STRUCTURE FROM BIOMONITORING AND LITERATURE-BASED DIET DATA TO DETECT CHANGES IN ECOSYSTEM FUNCTION
Ecosystem function is an increasingly important component in bioassessment but many types of function are too intensive to be incorporated into routine biomonitoring schemes. Using food webs to assess interspecific interactions or community stability requires large samples for extensive gut analysis or processing using molecular techniques. Estimating food webs using a combination of direct sampling and literature data may work as a feasible alternative. This approach was attempted using seasonal invertebrate biomonitoring data collected from six sites on the Ogeechee River with jab nets. For each sample a 200 (±20%) invertebrate subsample was taken and identified to lowest feasible taxonomic level, generally genus. Samples demonstrated considerable variability in community structure by site and season, with lower species richness and evenness in the spring. Taxon specific feeding interactions were identified from the literature and used to construct qualitative sample food webs. Food webs were then assessed for differences in structural properties such as number of links, linkage density, prey-predator ratios, mean food chain length and connectance. Changes in these properties may affect the resilience of communities to human impacts and may therefore be important for biomonitoring and management.
- Food Webs
- Function
- Monitoring
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Presenters/Authors
Julien Buchbinder
(), Georgia Southern University, jb19126@georgiasouthern.edu;
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Checo Colón-Gaud
(), Georgia Southern University, jccolongaud@georgiasouthern.edu;
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Stephen Vives
(), Georgia Southern University, svives@georgiasouthern.edu;
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