globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13441
论文题名:
Global-change drivers of ecosystem functioning modulated by natural variability and saturating responses
作者: Flombaum P.; Yahdjian L.; Sala O.E.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
卷: 23, 期:2
起始页码: 503
结束页码: 511
语种: 英语
英文关键词: biodiversity loss ; climate change ; ecosystem sensitivity ; land-use change ; nitrogen deposition
英文摘要: Humans are altering global environment at an unprecedented rate through changes in biodiversity, climate, nitrogen cycle, and land use. To address their effects on ecosystem functioning, experiments most frequently explore one driver at a time and control as many confounding factors as possible. Yet, which driver exerts the largest influence on ecosystem functioning and whether their relative importance changes among systems remain unclear. We analyzed experiments in the Patagonian steppe that evaluated the aboveground net primary production (ANPP) response to manipulated gradients of species richness, precipitation, temperature, nitrogen fertilization (N), and grazing intensity. We compared the effect on ANPP relative to ambient conditions considering intensity and direction of manipulations for each driver. The ranking of responses to drivers with comparable manipulation intensity was as follows: biodiversity>grazing>precipitation>N. For a similar intensity of manipulation, the effect of biodiversity loss was 4.0, 3.6, and 1.5, times larger than N deposition, decreased precipitation, and increased grazing intensity. We interpreted our results considering two hypotheses. First, the response of ANPP to changes in precipitation and biodiversity is saturating, so we expected larger effects when the driver was reduced, relative to ambient conditions, than when it was increased. Experimental manipulations that reduced ambient levels had larger effects than those that increased them. Second, the sensitivity of ANPP to each driver is inversely related to the natural variability of the driver. In Patagonia, the ranking of natural variability of drivers is as follows: precipitation>grazing>temperature>biodiversity>N. So, in general, the ecosystem was most sensitive to drivers that varied the least. Comparable results from Cedar Creek (MN) support both hypotheses and suggest that sensitivity to drivers varies among ecosystem types. Given the importance of understanding ecosystem sensitivity to predict global-change impacts, it is necessary to design new experiments located in regions with contrasting natural variability and that include the full range of drivers. © 2016 John Wiley & Sons Ltd
资助项目: We would like to thank Cedar Creek Long Term Ecological Research for providing climatic data and G.A Gil for guidance. Financial support for this work was provided by UBACYT 20020150200261BA (PF), National Research Council of Argentina PIP 555/12 (LY), National Agency of Science and Technology PICT 2014-3026 (LY) PICT-2014-0887 (PF), National Research Council of France (AO2015-876370) (PF), and US National Science Foundation DEB-1235828 (OES).
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61065
Appears in Collections:影响、适应和脆弱性

Files in This Item:

There are no files associated with this item.


作者单位: Centro de Investigaciones del Mar y la Atmósfera, Consejo Nacional de Investigaciones Científicas y Técnicas, and Departamento de Ecología Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II piso 2, Ciudad Universitaria, Buenos Aires, Argentina; Facultad de Agronomía, Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura, and Cátedra de Ecología, Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas, Avenida San Martín 4453, Buenos Aires, Argentina; School of Life Sciences and School of Sustainability, Arizona State University, PO Box 874501, Tempe, AZ, United States

Recommended Citation:
Flombaum P.,Yahdjian L.,Sala O.E.. Global-change drivers of ecosystem functioning modulated by natural variability and saturating responses[J]. Global Change Biology,2017-01-01,23(2)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Flombaum P.]'s Articles
[Yahdjian L.]'s Articles
[Sala O.E.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Flombaum P.]'s Articles
[Yahdjian L.]'s Articles
[Sala O.E.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Flombaum P.]‘s Articles
[Yahdjian L.]‘s Articles
[Sala O.E.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.