Species differentiation on a dynamic landscape: shifts in metapopulation genetic structure using the chronology of the Hawaiian Archipelago

Evolutionary Biology
By: , and 

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Abstract

Species formation during adaptive radiation often occurs in the context of a changing environment. The establishment and arrangement of populations, in space and time, sets up ecological and genetic processes that dictate the rate and pattern of differentiation. Here, we focus on how a dynamic habitat can affect genetic structure, and ultimately, differentiation among populations. We make use of the chronology and geographical history provided by the Hawaiian archipelago to examine the initial stages of population establishment and genetic divergence. We use data from a set of 6 spider lineages that differ in habitat affinities, some preferring low elevation habitats with a longer history of connection, others being more specialized for high elevation and/or wet forest, some with more general habitat affinities. We show that habitat preferences associated with lineages are important in ecological and genetic structuring. Lineages that have more restricted habitat preferences are subject to repeated episodes of isolation and fragmentation as a result of lava flows and vegetation succession. The initial dynamic set up by the landscape translates over time into discrete lineages. Further work is needed to understand how genetic changes interact with a changing set of ecological interactions amongst a shifting mosaic of landscapes to achieve species formation.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Species differentiation on a dynamic landscape: shifts in metapopulation genetic structure using the chronology of the Hawaiian Archipelago
Series title Evolutionary Biology
DOI 10.1007/s11692-012-9184-5
Volume 39
Issue 2
Year Published 2012
Language English
Publisher Plenum Press
Publisher location New York, NY
Contributing office(s) Western Ecological Research Center
Description 15 p.
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Evolutionary Biology
First page 192
Last page 206
Country United States
State Hawai'i