Exploring how cyanobacterial traits affect nutrient loading thresholds in shallow lakes : A modelling approach
| Autor: | Annette B.G. Janssen, Wolf M. Mooij, Manqi Chang, Hans W. Paerl, Sven Teurlincx, Jan H. Janse |
|---|---|
| Přispěvatelé: | Aquatic Ecology (AqE), AKWA |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Aquatic Ecology and Water Quality Management lcsh:Hydraulic engineering regime shift Light limitation Geography Planning and Development Critical nutrient loading 010501 environmental sciences Aquatic Science 01 natural sciences Biochemistry Algal bloom alternative stable state Regime shift Nutrient lcsh:Water supply for domestic and industrial purposes Alternative stable state Ecosystem model lcsh:TC1-978 Harmful algal blooms resilience critical nutrient loading 0105 earth and related environmental sciences Water Science and Technology PCLake lcsh:TD201-500 nutrient limitation WIMEK Resilience Ecology 010604 marine biology & hydrobiology Hysteresis national light limitation Aquatische Ecologie en Waterkwaliteitsbeheer harmful algal blooms hysteresis Nutrient limitation Environmental science Water Systems and Global Change Water quality Plan_S-Compliant_OA Eutrophication |
| Zdroj: | Water (Switzerland) 12 (2020) 9 Water, 12(9):2467. Multidisciplinary Digital Publishing Institute (MDPI) Water (Switzerland), 12(9) Water Volume 12 Issue 9 Water, Vol 12, Iss 2467, p 2467 (2020) |
| ISSN: | 2073-4441 |
| Popis: | Globally, many shallow lakes have shifted from a clear macrophyte-dominated state to a turbid phytoplankton-dominated state due to eutrophication. Such shifts are often accompanied by toxic cyanobacterial blooms, with specialized traits including buoyancy regulation and nitrogen fixation. Previous work has focused on how these traits contribute to cyanobacterial competitiveness. Yet, little is known on how these traits affect the value of nutrient loading thresholds of shallow lakes. These thresholds are defined as the nutrient loading at which lakes shift water quality state. Here, we used a modelling approach to estimate the effects of traits on nutrient loading thresholds. We incorporated cyanobacterial traits in the process-based ecosystem model PCLake+, known for its ability to determine nutrient loading thresholds. Four scenarios were simulated, including cyanobacteria without traits, with buoyancy regulation, with nitrogen fixation, and with both traits. Nutrient loading thresholds were obtained under N-limited, P-limited, and colimited conditions. Results show that cyanobacterial traits can impede lake restoration actions aimed at removing cyanobacterial blooms via nutrient loading reduction. However, these traits hardly affect the nutrient loading thresholds for clear lakes experiencing eutrophication. Our results provide references for nutrient loading thresholds and draw attention to cyanobacterial traits during the remediation of eutrophic water bodies. |
| Databáze: | OpenAIRE |
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