Journal
WATER RESEARCH
Volume 219, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2022.118573
Keywords
organic nutrients; C; N; P; phytoplankton; cyanobacteria
Funding
- National Science Foundation [DBI RCN 0639229, MSB 1137327, 1137353]
- Great Lakes Restoration Initiative via a National Park Service Cooperative Agreement [P17AC00246]
- NSF [1638554]
- NOAA Office for Coastal Management [NA18NOS4200151]
- Federal Coastal ZoneManagement Act
- United States Geological Survey (USGS) [G21AC10038]
- NERC Centre for Doctoral Training in Freshwater Biosciences and Sustainability [GW4 FRESH CDT]
- H2020 European Research and Innovation action Grant Agreement (DRYvER) [869226]
- Royal Dutch Academy of Science (KNAW)
- German Science Foundation [DFG GR1540/37-1]
- USGS [G21AP10582]
- Division Of Environmental Biology
- Direct For Biological Sciences [1638554] Funding Source: National Science Foundation
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This review investigates the role of carbon, nitrogen, and phosphorus as critical macroelements in freshwater systems. It explores the various mechanisms through which phytoplankton can utilize the organic nutrient pool, highlighting the influence of naturally- and anthropogenically-derived organic nutrients on phytoplankton community structure. The review also discusses knowledge gaps in phytoplankton physiology and the potential challenges of nutrient management in an organically dynamic and anthropogenically modified world.
Carbon, nitrogen, and phosphorus are critical macroelements in freshwater systems. Historically, researchers and managers have focused on inorganic forms, based on the premise that the organic pool was not available for direct uptake by phytoplankton. We now know that phytoplankton can tap the organic nutrient pool through a number of mechanisms including direct uptake, enzymatic hydrolysis, mixotrophy, and through symbiotic relationships with microbial communities. In this review, we explore these mechanisms considering current and projected future anthropogenically-driven changes to freshwater systems. In particular, we focus on how naturally- and anthropogenically- derived organic nutrients can influence phytoplankton community structure. We also synthesize knowledge gaps regarding phytoplankton physiology and the potential challenges of nutrient management in an organically dynamic and anthropogenically modified world. Our review provides a basis for exploring these topics and suggests several avenues for future work on the relation between organic nutrients and eutrophication and their ecological implications in freshwater systems.
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