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New Research out in Nature – Size and Age of Plants Impact Their Productivity More Than Climate, UA Study Shows

UA professor Brian Enquist and postdoctoral researcher Sean Michaletz, along with collaborators Dongliang Cheng from Fujian Normal University in China and Drew Kerkhoff from Kenyon College in Gambier, Ohio, have combined a new mathematical theory with data from more than 1,000 forests across the world to show that climate has a relatively minor direct effect on net primary productivity, or the amount of […]

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Interesting paper on intraspecific trait variation and range shifts

Angert AL, SN Sheth, and JR Paul. 2011. Incorporating population variation in thermal performance into geographic range shift predictions. Integrative and Comparative Biology,  “Therefore, species-level projections of distribution might overestimate the species’ ability to persist at any given location. However, current approaches to modeling distributions often do not consider variation among populations. Here, we estimated genetically-based differences in thermal performance curves for growth among 12 populations of the scarlet monkeyflower, Mimulus cardinalis, a perennial herb of western North America. We inferred the maximum relative growth rate (RGRmax), temperature optimum (Topt), and temperature breadth (Tbreadth) for each population. We used these data to test for tradeoffs in thermal performance, generate mechanistic population-level projections of distribution under current and future climates” 

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