نتایج جستجو برای: gymnosperms

تعداد نتایج: 875  

2016
Ziyu Ma Brody Sandel Jens‐Christian Svenning

How fast does biodiversity respond to climate change? The relationship of past and current climate with phylogenetic assemblage structure helps us to understand this question. Studies of angiosperm tree diversity in North America have already suggested effects of current water-energy balance and tropical niche conservatism. However, the role of glacial-interglacial climate variability remains t...

2015
Daniel Uddenberg Shirin Akhter Prashanth Ramachandran Jens F. Sundström Annelie Carlsbecker

Conifers, Ginkgo, cycads and gnetophytes comprise the four groups of extant gymnosperms holding a unique position of sharing common ancestry with the angiosperms. Comparative studies of gymnosperms and angiosperms are the key to a better understanding of ancient seed plant morphologies, how they have shifted over evolution to shape modern day species, and how the genes governing these morpholog...

Journal: :The American Naturalist 1907

Journal: :American Midland Naturalist 1935

Journal: :The American Naturalist 1907

Journal: :Current Biology 2011
Charles C. Davis Hanno Schaefer

Living gymnosperms represent the survivors of ancient seed plant lineages whose fossil record reaches back 270 million years. Two recent studies find that recent pulses of extinction and speciation have shaped today's gymnosperm diversity, contradicting the widespread assumption that gymnosperms have remained largely unchanged for tens of millions of years.

Journal: :International Journal of Current Research and Academic Review 2017

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