Strong responses from weakly interacting species.

Abstract:

:The impact of species loss from competitive communities partly depends on how populations of the surviving species respond. Predicting the response should be straightforward using models that describe population growth as a function of competitor densities; but these models require accurate estimates of interaction strengths. Here, we quantified how well we could predict responses to competitor removal in a community of annual plants, using a combination of observation and experiment. It was straightforward to fit models to multi-species communities, which passed standard diagnostic tests and provided apparently sensible estimates of interaction strengths. However, the models consistently underpredicted the response to competitor removal, by a factor of at least 50%. We argue that this poor predictive ability is likely to be general in plant communities due to 'the ghost of competition present' that confines species to parts of the environment in which they compete best.

journal_name

Ecol Lett

journal_title

Ecology letters

authors

Tuck SL,Porter J,Rees M,Turnbull LA

doi

10.1111/ele.13163

subject

Has Abstract

pub_date

2018-12-01 00:00:00

pages

1845-1852

issue

12

eissn

1461-023X

issn

1461-0248

journal_volume

21

pub_type

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