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The effects of functional diversity on biomass production, variability, and resilience of ecosystem functions in a tritrophic system.

Abstract：

:Diverse communities can adjust their trait composition to altered environmental conditions, which may strongly influence their dynamics. Previous studies of trait-based models mainly considered only one or two trophic levels, whereas most natural system are at least tritrophic. Therefore, we investigated how the addition of trait variation to each trophic level influences population and community dynamics in a tritrophic model. Examining the phase relationships between species of adjacent trophic levels informs about the strength of top-down or bottom-up control in non-steady-state situations. Phase relationships within a trophic level highlight compensatory dynamical patterns between functionally different species, which are responsible for dampening the community temporal variability. Furthermore, even without trait variation, our tritrophic model always exhibits regions with two alternative states with either weak or strong nutrient exploitation, and correspondingly low or high biomass production at the top level. However, adding trait variation increased the basin of attraction of the high-production state, and decreased the likelihood of a critical transition from the high- to the low-production state with no apparent early warning signals. Hence, our study shows that trait variation enhances resource use efficiency, production, stability, and resilience of entire food webs.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Ceulemans R,Gaedke U,Klauschies T,Guill C

doi

10.1038/s41598-019-43974-1

subject

Has Abstract

pub_date

2019-05-17 00:00:00

pages

7541

issue

1

issn

2045-2322

pii

10.1038/s41598-019-43974-1

journal_volume

9

pub_type

杂志文章

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