globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13912
Scopus记录号: 2-s2.0-85042149713
论文题名:
Increased resource use efficiency amplifies positive response of aquatic primary production to experimental warming
作者: Hood J.M.; Benstead J.P.; Cross W.F.; Huryn A.D.; Johnson P.W.; Gíslason G.M.; Junker J.R.; Nelson D.; Ólafsson J.S.; Tran C.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期:3
起始页码: 1069
结束页码: 1084
语种: 英语
英文关键词: climate change ; ecosystem respiration ; gross primary production ; headwater streams ; nutrient cycling ; nutrient use efficiency ; stream metabolism ; temperature
Scopus关键词: climate change ; experimental study ; global warming ; headwater ; metabolism ; net primary production ; nutrient cycling ; resource use ; respiration ; water temperature
英文摘要: Climate warming is affecting the structure and function of river ecosystems, including their role in transforming and transporting carbon (C), nitrogen (N), and phosphorus (P). Predicting how river ecosystems respond to warming has been hindered by a dearth of information about how otherwise well-studied physiological responses to temperature scale from organismal to ecosystem levels. We conducted an ecosystem-level temperature manipulation to quantify how coupling of stream ecosystem metabolism and nutrient uptake responded to a realistic warming scenario. A ~3.3°C increase in mean water temperature altered coupling of C, N, and P fluxes in ways inconsistent with single-species laboratory experiments. Net primary production tripled during the year of experimental warming, while whole-stream N and P uptake rates did not change, resulting in 289% and 281% increases in autotrophic dissolved inorganic N and P use efficiency (UE), respectively. Increased ecosystem production was a product of unexpectedly large increases in mass-specific net primary production and autotroph biomass, supported by (i) combined increases in resource availability (via N mineralization and N2 fixation) and (ii) elevated resource use efficiency, the latter associated with changes in community structure. These large changes in C and nutrient cycling could not have been predicted from the physiological effects of temperature alone. Our experiment provides clear ecosystem-level evidence that warming can shift the balance between C and nutrient cycling in rivers, demonstrating that warming will alter the important role of in-stream processes in C, N, and P transformations. Moreover, our results reveal a key role for nutrient supply and use efficiency in mediating responses of primary producers to climate warming. © 2017 John Wiley & Sons Ltd
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110507
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

Files in This Item:

There are no files associated with this item.


作者单位: Aquatic Ecology Laboratory, Department of Evolution, Ecology, and Organismal Biology, The Ohio State University, Columbus, OH, United States; Department of Ecology, Montana State University, Bozeman, MT, United States; Department of Biological Sciences, University of Alabama, Tuscaloosa, AL, United States; Department of Civil, Construction, and Environmental Engineering, University of Alabama, Tuscaloosa, AL, United States; Institute of Life and Environmental Sciences, University of Iceland, Reykjavík, Iceland; Marine and Freshwater Research Institute, Reykjavík, Iceland; NEON Project, Battelle Ecology Inc., Boulder, CO, United States

Recommended Citation:
Hood J.M.,Benstead J.P.,Cross W.F.,et al. Increased resource use efficiency amplifies positive response of aquatic primary production to experimental warming[J]. Global Change Biology,2018-01-01,24(3)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Hood J.M.]'s Articles
[Benstead J.P.]'s Articles
[Cross W.F.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Hood J.M.]'s Articles
[Benstead J.P.]'s Articles
[Cross W.F.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Hood J.M.]‘s Articles
[Benstead J.P.]‘s Articles
[Cross W.F.]‘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.