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Abstract Detail

Ecological Section

Park, Daniel [1], Potter, Daniel [2].

The Perils and Pitfalls of Community Phylogenetics: A Reciprocal Test of Darwin's Naturalization Hypothesis in Mediterranean Climates.

Mediterranean climates habor many of planet’s most species-rich regions. They are also among the most invaded ecosystems in the world. Despite their ubiquity in these regions, however, not all alien species rise to the status of being invasive. Here, we investigate the sunflower subclades Astereae (daisies) and Cardueae (thistles) in the California Floristic Province and Mediterranean Basin to determine if invasives are on average more distantly related to natives than are non-invasive introduced taxa (i.e., Darwin’s Naturalization Hypothesis). To accomplish this goal, we sampled three genes from 350 taxa to assess this question using a global phylogeny of our two sunflower subclades. We find that contrary to Darwin’s predictions, close relatives make bad neighbors on both sides of the Atlantic. Moreover, we move beyond a simple phylogenetic framework and assess niche preferences for native and invasive species using ecological niche modeling approaches. Our results suggest that pre-adapted niches preferences may drive the phylogenetic patterns behind biological invasions in Mediterranean climates. Furthermore, our study highlights ways to avoid the perils and pitfalls that can affect common phylogenetic approaches currently applied in community ecology studies.

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1 - Harvard University, Organismal and Evolutionary Biology, 22 Divinity Ave. , Harvard University Herbarium, Cambridge, MA, 02138, USA
2 - University Of California Davis, Department Of Plant Sciences Mail Stop 2, One Shields Avenue, Davis, CA, 95616-8780, USA

Niche Modeling
invasive species
Community ecology.

Presentation Type: Oral Paper:Papers for Sections
Session: 35
Location: Salon 6/The Shaw Conference Centre
Date: Tuesday, July 28th, 2015
Time: 9:00 AM
Number: 35005
Abstract ID:1355
Candidate for Awards:None

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