2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/23/2019 | 12:00 PM - 12:15 PM | ANALYSIS OF FOOD WEB TOPOLOGY ALONG A HEADWATER STREAM GRADIENT AND IMPLICATIONS FOR COMMUNITY RESILIENCE | 250 AB
ANALYSIS OF FOOD WEB TOPOLOGY ALONG A HEADWATER STREAM GRADIENT AND IMPLICATIONS FOR COMMUNITY RESILIENCE
Understanding the structure and functionality of food webs is a key component of effective ecosystem management. Conceptualizing and quantifying aspects of food web topology is vital to identifying trends in community structuring and aiding in future predictive abilities. Headwater streams play a direct role in the integrity of downstream systems, affecting nutrient transport, primary production, and fisheries. Using long-term data collected from headwater streams at the H.J. Andrews Experimental Forest, I constructed food webs using the Cheddar package and WebBuilder function in R. These tools allow users to quantify web attributes such as connectance and generality, and therefore compare food webs along spatial and environmental gradients. Comparisons of communities without a top predator (Oncorhynchus clarkii clarkii) were made with more diverse webs in the river network to identify the influence that Cutthroat Trout plays in the structural complexity and stability of stream food webs. Finally, a non-metric multidimensional scaling analysis was preformed to assess the overall similarities and dissimilarities of all food webs in the headwater network. Implications of structural heterogeneity to community stability are covered, and preliminary results are presented from a subset of the food web data analyzed.
- Network
- Landscape
- Spatial
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Presenters/Authors
Lauren Zatkos
(), Oregon State University, lauren.zatkos@oregonstate.edu;
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