A5046301135- Arctic and Antarctic ice dynamics
- Isotope Analysis in Ecology
- Marine animal studies overview
- Geological formations and processes
- Animal Vocal Communication and Behavior
- Marine Biology and Ecology Research
- Environmental DNA in Biodiversity Studies
- Marine Bivalve and Aquaculture Studies
- Marine and coastal ecosystems
- Avian ecology and behavior
- Aeolian processes and effects
American University
2024
Natural History Museum
2023
University of Maryland Center for Environmental Science
2020-2021
An assessment of the production, distribution and fate highly branched isoprenoid (HBI) biomarkers produced by sea ice pelagic diatoms is necessary to interpret their detection proportions in northern Bering Chukchi Seas. HBIs measured surface sediments collected from 2012 2017 were used determine seasonality relative patterns. A northward gradient increasing algae deposition was observed with localized occurrences elevated IP25 (sympagic HBI) concentrations 68–70°N consistently strong...
Abstract Sea ice primary production is considered a valuable energy source for Arctic marine food webs, yet the extent remains unclear through existing methods. Here we quantify algal carbon signatures using unique lipid biomarkers in over 2300 samples from 155 species including invertebrates, fish, seabirds, and mammals collected across shelves. Ice were present within 96% of organisms investigated, year-round January to December, suggesting continuous utilization this resource despite its...
Understanding changes at the base of marine food web in rapidly transforming Arctic is essential for predicting and evaluating ecosystem dynamics. The northern Bering Sea experienced record low sea ice 2018, followed by second lowest 2019, highlighting urgency issue this region. In study, we investigated diet clam Macoma calcarea Pacific using DNA metabarcoding, employing 18S rbcL markers to identify dietary components. Our findings revealed a strong dependence on pelagic diatoms,...
We studied ice algae utilization by benthic fauna from the northern Bering and Chukchi Seas using highly branched isoprenoid (HBI) biomarkers. assessed whether various food acquisition strategies influence observed HBI signatures. The proportion of phytoplankton to algae-sourced HBIs was determined through H-Print approach that is presumed reflect percentage sea organic carbon (iPOC) incorporated into tissues, relative carbon. Cluster analysis separated 3 groups based on location feeding...
The expected reduction of ice algae with declining sea may prove to be detrimental the Pacific Arctic ecosystem. Benthic organisms that rely on organic carbon (iPOC) sustain benthic predators such as walrus (Odobenus rosmarus divergens). ability track trophic transfer iPOC is critical understanding its value in food web, but prior methods have lacked required source specificity. We analyzed H-Print index, based biomarkers versus phytoplankton contributions marine predators, livers collected...