منابع مشابه
Several origins of floral oil in the Angelonieae, a southern hemisphere disjunct clade of Plantaginaceae.
UNLABELLED • PREMISE OF THE STUDY Over the past 75 Myr, successive groups of plants have entered the "oil bee pollination niche," meaning that they depend on oil-collecting bees for their pollination. The highly dissimilar numbers of plant species and bee species involved in these mutualisms imply evolutionary host switching, asymmetric mutual dependencies, and uncoupled diversification. Amon...
متن کاملFinal warming of the Southern Hemisphere polar
6 The final warming date of the polar vortex is a key component of 7 Southern Hemisphere stratospheric and tropospheric variability in spring 8 and summer. We examine the effect of external forcings on Southern 9 Hemisphere final warming date, and the sensitivity of any projected changes 10 to model representation of the stratosphere. Final warming date is cal11 culated using a temperature-base...
متن کاملBiogeographic analysis of the woody plants of the Southern Appalachians: Implications for the origins of a regional flora.
PREMISE OF THE STUDY We investigated the origins of 252 Southern Appalachian woody species representing 158 clades to analyze larger patterns of biogeographic connectivity around the northern hemisphere. We tested biogeographic hypotheses regarding the timing of species disjunctions to eastern Asia and among areas of North America. METHODS We delimited species into biogeographically informati...
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ژورنال
عنوان ژورنال: Science
سال: 2015
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.347.6217.39-b