气候变化领域集成服务门户(CCPortal): Nitrogen-fixing trees inhibit growth of regenerating Costa Rican rainforests

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DOI	10.1073/pnas.1707094114
	Nitrogen-fixing trees inhibit growth of regenerating Costa Rican rainforests
	Taylor B.N.; Chazdon R.L.; Bachelot B.; Menge D.N.L.
发表日期	2017
ISSN	0027-8424
起始页码	8817
结束页码	8822
卷号	114 期号:33
英文摘要	More than half of the world’s tropical forests are currently recovering from human land use, and this regenerating biomass now represents the largest carbon (C)-capturing potential on Earth. How quickly these forests regenerate is now a central concern for both conservation and global climate-modeling efforts. Symbiotic nitrogen-fixing trees are thought to provide much of the nitrogen (N) required to fuel tropical secondary regrowth and therefore to drive the rate of forest regeneration, yet we have a poor understanding of how these N fixers influence the trees around them. Do they promote forest growth, as expected if the new N they fix facilitates neighboring trees? Or do they suppress growth, as expected if competitive inhibition of their neighbors is strong? Using 17 consecutive years of data from tropical rainforest plots in Costa Rica that range from 10 y since abandonment to old-growth forest, we assessed how N fixers influenced the growth of forest stands and the demographic rates of neighboring trees. Surprisingly, we found no evidence that N fixers facilitate biomass regeneration in these forests. At the hectare scale, plots with more N-fixing trees grew slower. At the individual scale, N fixers inhibited their neighbors even more strongly than did nonfixing trees. These results provide strong evidence that N-fixing trees do not always serve the facilitative role to neighboring trees during tropical forest regeneration that is expected given their N inputs into these systems. © 2017, National Academy of Sciences. All rights reserved.
英文关键词	Growth; Neighborhood crowding; Nitrogen fixation; Succession; Tropical forest
语种	英语
scopus关键词	nitrogen; Article; biomass; Costa Rican; forest stand; growth rate; nitrogen fixation; priority journal; regeneration; tree; tropical rain forest; Costa Rica; growth, development and aging; nitrogen fixation; physiology; rain forest; tree; Costa Rica; Nitrogen Fixation; Rainforest; Trees
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159058
作者单位	Taylor, B.N., Department of Ecology, Evolution, and Environmental Biology, Columbia University, New York, NY 10027, United States; Chazdon, R.L., Department of Ecology and Evolutionary Biology, University of Connecticut, Storrs, CT 06269, United States; Bachelot, B., Department of BioScience, Rice University, Houston, TX 77096, United States; Menge, D.N.L., Department of Ecology, Evolution, and Environmental Biology, Columbia University, New York, NY 10027, United States
推荐引用方式 GB/T 7714	Taylor B.N.,Chazdon R.L.,Bachelot B.,et al. Nitrogen-fixing trees inhibit growth of regenerating Costa Rican rainforests[J],2017,114(33).
APA	Taylor B.N.,Chazdon R.L.,Bachelot B.,&Menge D.N.L..(2017).Nitrogen-fixing trees inhibit growth of regenerating Costa Rican rainforests.Proceedings of the National Academy of Sciences of the United States of America,114(33).
MLA	Taylor B.N.,et al."Nitrogen-fixing trees inhibit growth of regenerating Costa Rican rainforests".Proceedings of the National Academy of Sciences of the United States of America 114.33(2017).