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Media type:
E-Article
Title:
Transient LTRE analysis reveals the demographic and trait‐mediated processes that buffer population growth
Contributor:
Maldonado‐Chaparro, Adriana A.;
Blumstein, Daniel T.;
Armitage, Kenneth B.;
Childs, Dylan Z.
imprint:
Wiley, 2018
Published in:Ecology Letters
Language:
English
DOI:
10.1111/ele.13148
ISSN:
1461-0248;
1461-023X
Origination:
Footnote:
Description:
<jats:title>Abstract</jats:title><jats:p>Temporal variation in environmental conditions affects population growth directly via its impact on vital rates, and indirectly through induced variation in demographic structure and phenotypic trait distributions. We currently know very little about how these processes jointly mediate population responses to their environment. To address this gap, we develop a general transient life table response experiment (<jats:styled-content style="fixed-case">LTRE</jats:styled-content>) which partitions the contributions to population growth arising from variation in (1) survival and reproduction, (2) demographic structure, (3) trait values and (4) climatic drivers. We apply the <jats:styled-content style="fixed-case">LTRE</jats:styled-content> to a population of yellow‐bellied marmots (<jats:italic>Marmota flaviventer</jats:italic>) to demonstrate the impact of demographic and trait‐mediated processes. Our analysis provides a new perspective on demographic buffering, which may be a more subtle phenomena than is currently assumed. The new <jats:styled-content style="fixed-case">LTRE</jats:styled-content> framework presents opportunities to improve our understanding of how trait variation influences population dynamics and adaptation in stochastic environments.</jats:p>