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首页> 外文期刊>Ecology letters >Beyond nitrogen: phosphorus - estimating the minimum niche dimensionality for resource competition between phytoplankton
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Beyond nitrogen: phosphorus - estimating the minimum niche dimensionality for resource competition between phytoplankton

机译：超越氮：磷 - 估计浮游植物之间资源竞争的最低利基维度

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摘要

The niche dimensionality required for coexistence is often discussed in terms of the number of limiting resources. N and P limitation are benchmarks for studying phytoplankton interactions. However, it is generally agreed that limitation by small numbers of resources cannot explain the high phytoplankton diversity observed in nature. Here, we parameterised resource competition models using experimental data for six phytoplankton species grown in monoculture with nine potential limiting resources. We tested predicted species biomass from these models against observations in two-species experimental mixtures. Uptake rates were similar across species, following the classic Redfield ratio. Model accuracy levelled out at around three to five resources suggesting the minimum dimensionality of this system. The models included the resources Fe, Mg, Na and S. Models including only N and P always performed poorly. These results suggest that high-dimensional information about resource limitation despite stoichiometric constraints may be needed to accurately predict community assembly.
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