The adaptive potential of plant populations in response to extreme climate events.

Abstract:

:The frequency and magnitude of extreme climate events are increasing with global change, yet we lack predictions and empirical evidence for the ability of wild populations to persist and adapt in response to these events. Here, we used Fisher's Fundamental Theorem of Natural Selection to evaluate the adaptive potential of Lasthenia fremontii, a herbaceous winter annual that is endemic to seasonally flooded wetlands in California, to alternative flooding regimes that occur during El Niño Southern Oscillation (ENSO) events. The results indicate that populations may exhibit greater adaptive potential in response to dry years than wet years, and that the relative performance of populations will change across climate scenarios. More generally, our findings show that extreme climate events can substantially change the potential for populations to adapt to climate change by modulating the expression of standing genetic variation and mean fitness.

journal_name

Ecol Lett

journal_title

Ecology letters

authors

Torres-Martínez L,McCarten N,Emery NC

doi

10.1111/ele.13244

subject

Has Abstract

pub_date

2019-05-01 00:00:00

pages

866-874

issue

5

eissn

1461-023X

issn

1461-0248

journal_volume

22

pub_type

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