期刊
ECOLOGICAL MODELLING
卷 361, 期 -, 页码 184-196出版社
ELSEVIER
DOI: 10.1016/j.ecolmodel.2017.06.020
关键词
Shannon entropy; Plankton foodwebs; Species-traits; Ecological selection; Ecosystem modelling
类别
资金
- Spanish government [CGL2013-41256-P, CTM2014-54926-R]
- NSF from United States government [1434007]
- French Laboratory of Excellence project TULIP [ANR-10-LABX-41, ANR-11-IDEX-0002-02]
- BIOSTASES - European Research Council under European Union's Horizon research and innovation programme [666971]
- Region Midi- Pyrenees project [CNRS 121090]
- Spanish government
- Directorate For Geosciences
- Division Of Ocean Sciences [1434007] Funding Source: National Science Foundation
The effect of biodiversity on ecosystem functioning is one of the major questions of ecology. However, the role of phytoplankton functional diversity in ecosystem productivity and stability under fluctuating (i.e. non-equilibrium) environments remains largely unknown. Here we use a marine ecosystem model to study the effect of phytoplankton functional diversity on both ecosystem productivity and its stability for seasonally variable nutrient supply and temperature. Functional diversity ranges from low to high along these two environmental axes independently. Changes in diversity are obtained by varying the range of uptake strategies and thermal preferences of the species present in the community. Species can range from resource gleaners to opportunists, and from cold to warm thermal preferences. The phytoplankton communities self-assemble as a result of species selection by resource competition (nutrients) and environmental filtering (temperature). Both processes lead to species asynchrony but their effect on productivity and stability differ. We find that the diversity of temperature niches has a strong and direct positive effect on productivity and stability due to species complementarity, while the diversity of uptake strategies has a weak and indirect positive effect due to sampling probability. These results show that more functionally diverse phytoplankton communities lead to higher and more stable ecosystem productivity but the positive effect of biodiversity on ecosystem functioning depends critically on the type of environmental gradient. (C) 2017 The Authors. Published by Elsevier B.V.
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