Nitrogen fixation does not axiomatically lead to phosphorus limitation in aquatic ecosystems
| Autor: | Jan J. Kuiper, Jeroen J. M. de Klein, Luuk P. A. van Gerven, Wolf M. Mooij, Hans W. Paerl, Jan H. Janse |
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| Přispěvatelé: | Aquatic Ecology (AqE) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Aquatic Ecology and Water Quality Management media_common.quotation_subject chemistry.chemical_element 010603 evolutionary biology 01 natural sciences Competition (biology) Nutrient Ecosystem model Phytoplankton Ecosystem Ecology Evolution Behavior and Systematics media_common WIMEK Ecology R 010604 marine biology & hydrobiology Phosphorus Aquatic ecosystem Aquatische Ecologie en Waterkwaliteitsbeheer PE&RC eutrophication chemistry nitrogen fixation international Environmental science Eutrophication |
| Zdroj: | Oikos 128 (2019) 4 Oikos, 128(4), 563-570 Oikos, 128(4), 563-570. John Wiley and Sons Ltd |
| ISSN: | 0030-1299 |
| Popis: | A long-standing debate in ecology deals with the role of nitrogen and phosphorus in management and restoration of aquatic ecosystems. It has been argued that nutrient reduction strategies to combat blooms of phytoplankton or floating plants should solely focus on phosphorus (P). The underlying argument is that reducing nitrogen (N) inputs is ineffective because N2-fixing species will compensate for N deficits, thus perpetuating P limitation of primary production. A mechanistic understanding of this principle is, however, incomplete. Here, we use resource competition theory, a complex dynamic ecosystem model and a 32-year field data set on eutrophic, floating-plant dominated ecosystems to show that the growth of non-N2-fixing species can become N limited under high P and low N inputs, even in the presence of N2 fixing species. N2-fixers typically require higher P concentrations than non-N2-fixers to persist. Hence, the N2 fixers cannot deplete the P concentration enough for the non-N2-fixing community to become P limited because they would be outcompeted. These findings provide a testable mechanistic basis for the need to consider the reduction of both N and P inputs to most effectively restore nutrient over-enriched aquatic ecosystems. This article is protected by copyright. All rights reserved. |
| Databáze: | OpenAIRE |
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