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Abstract (from Marine Ecology Progress Series): Heterotrophic nanoflagellates (HNANs) play a pivotal role as consumers of picoplankton, remineralizers and carbon vectors, yet knowledge on how prey quantity and quality affect HNAN physiology remains limited. In a series of grazing experiments using an uncharacterized member of the HNAN assemblage, we found that growth (μ) and ingestion rate (IR) varied when offering heterotrophic bacteria (HB), Synechococcus spp. (Syn), Ostreococcus lucimarinus (Ost) or a combination of all 3 prey types. Highest average μ rates (1.8 d-1) were detected on HB at densities of ~106 cells ml-1 and maximum IR on Syn (485 pg C d-1) at ~106 cells ml-1. Independent of prey type, flagellate...
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The Southeast Climate Adaptation Science Center (SE CASC) promotes collaborative research, with a focus on training next-generation scientists through active engagement with stakeholders and agencies, to enhance landscape-level conservation and management of natural and cultural resources. The SE CASC is hosted by North Carolina State University (NCSU) with consortium partners Duke University, Auburn University, University of Florida, University of Tennessee, and University of South Carolina. University host NCSU connects the SE CASC to top scientists and stakeholders across the region to address the complexities of land management and conservation during rapid climate change, population growth, and urbanization....
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Abstract (from ScienceDirect): Harmful algal blooms (HABs) create issues both environmentally and economically in coastal regions, especially if algal growth is linked to the production of toxins which can affect ecosystems, wildlife, and humans. This study is the first to confirm near year-round presence and co-occurrence of microcystins (MCs) and domoic acid (DA) within the outskirts of the largest lagoonal US estuary, the Pamlico-Albemarle Sound System (PASS). Monthly sampling at a time-series location in Bogue Sound, located within the eastern part of the PASS, showed DA and MCs were commonly present and detected together 50% of the time based on an in situ toxin tracking approach over a 6-year time period (2015–2020)....
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