2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/24/2021 | 2:00 PM - 3:30 PM | BIOASSAYS FOR TESTING EFFECTS OF CLIMATE CHANGE ON THE BASE OF ARCTIC FRESHWATER FOOD WEBS | Virtual Platform
BIOASSAYS FOR TESTING EFFECTS OF CLIMATE CHANGE ON THE BASE OF ARCTIC FRESHWATER FOOD WEBS
Climate change is one of the most important threats to aquatic biodiversity, and is expected to cause changes in mean water temperatures, catchment properties and water quality in Arctic freshwaters. Climate-driven changes in inputs of nutrients and organic matter from the catchment are expected to affect community composition and ecosystem processes such as productivity. However, to date, there is limited mechanistic knowledge of how these multiple stressors affect both quantity and quality of primary producers, as well as the transfer of energy and nutrients to grazers.
In this talk, we present details of combined bioassays that are designed to assess the effect of temperature, N:P ratios and organic carbon increase (“browning”) on the energy transfer in Arctic lake food webs. We describe a combination of different setups with batch-cultures of benthic and pelagic organisms (zooplankton, collectors, grazers and scrapers) and present approaches, challenges, and preliminary findings. The results of the bioassays will be used to validate climate-driven ecological predictions about basal resources in Arctic freshwater food webs, providing new insights into the response of primary producers and grazers to such stressors.
- Arctic Freshwater
- Food webs
- Energy flows
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Presenters/Authors
Fernando Chaguaceda
(), Swedish University of Agricultural Sciences, fernando.chaguaceda@slu.se;
ASHA DISCLOSURE:
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