globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13716
Global climate change will increase the abundance of symbiotic nitrogen-fixing trees in much of North America
Author: Liao W.; Menge D.N.L.; Lichstein J.W.; Ángeles-Pérez G.
Source Publication: Global Change Biology
ISSN: 13541013
Publishing Year: 2017
Language: 英语
Keyword: Actinorhizal ; Climate ; Precipitation ; Rhizobial ; Symbiotic nitrogen fixation ; Temperature
English Abstract: Symbiotic nitrogen (N)-fixing trees can drive N and carbon cycling and thus are critical components of future climate projections. Despite detailed understanding of how climate influences N-fixation enzyme activity and physiology, comparatively little is known about how climate influences N-fixing tree abundance. Here, we used forest inventory data from the USA and Mexico (>125,000 plots) along with climate data to address two questions: (1) How does the abundance distribution of N-fixing trees (rhizobial, actinorhizal, and both types together) vary with mean annual temperature (MAT) and precipitation (MAP)? (2) How will changing climate shift the abundance distribution of N-fixing trees? We found that rhizobial N-fixing trees were nearly absent below 15°C MAT, but above 15°C MAT, they increased in abundance as temperature rose. We found no evidence for a hump-shaped response to temperature throughout the range of our data. Rhizobial trees were more abundant in dry than in wet ecosystems. By contrast, actinorhizal trees peaked in abundance at 5-10°C MAT and were least abundant in areas with intermediate precipitation. Next, we used a climate-envelope approach to project how N-fixing tree relative abundance might change in the future. The climate-envelope projection showed that rhizobial N-fixing trees will likely become more abundant in many areas by 2080, particularly in the southern USA and western Mexico, due primarily to rising temperatures. Projections for actinorhizal N-fixing trees were more nuanced due to their nonmonotonic dependence on temperature and precipitation. Overall, the dominant trend is that warming will increase N-fixing tree abundance in much of the USA and Mexico, with large increases up to 40° North latitude. The quantitative link we provide between climate and N-fixing tree abundance can help improve the representation of symbiotic N fixation in Earth System Models. © 2017 John Wiley & Sons Ltd.
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Document Type: 期刊论文
Appears in Collections:影响、适应和脆弱性

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Affiliation: Department of Ecology, Evolution and Environmental Biology Columbia University New York, NY USA; Department of Ecology and Evolutionary Biology Princeton University Princeton, NJ USA; Department of Biology University of Florida Gainesville, FL USA; Colegio de Postgraduados Texcoco Mexico

Recommended Citation:
Liao W.,Menge D.N.L.,Lichstein J.W.,et al. Global climate change will increase the abundance of symbiotic nitrogen-fixing trees in much of North America[J]. Global Change Biology,2017-01-01
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