气候变化领域集成服务门户(CCPortal): Delayed herbivory by migratory geese increases summer-long CO2 uptake in coastal western Alaska

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DOI	10.1111/gcb.14473
	Delayed herbivory by migratory geese increases summer-long CO2 uptake in coastal western Alaska
	Leffler A.J.; Beard K.H.; Kelsey K.C.; Choi R.T.; Schmutz J.A.; Welker J.M.
发表日期	2019
ISSN	13541013
起始页码	277
结束页码	289
卷号	25 期号:1
英文摘要	The advancement of spring and the differential ability of organisms to respond to changes in plant phenology may lead to “phenological mismatches” as a result of climate change. One potential for considerable mismatch is between migratory birds and food availability in northern breeding ranges, and these mismatches may have consequences for ecosystem function. We conducted a three-year experiment to examine the consequences for CO2 exchange of advanced spring green-up and altered timing of grazing by migratory Pacific black brant in a coastal wetland in western Alaska. Experimental treatments represent the variation in green-up and timing of peak grazing intensity that currently exists in the system. Delayed grazing resulted in greater net ecosystem exchange (NEE) and gross primary productivity (GPP), while early grazing reduced CO2 uptake with the potential of causing net ecosystem carbon (C) loss in late spring and early summer. Conversely, advancing the growing season only influenced ecosystem respiration (ER), resulting in a small increase in ER with no concomitant impact on GPP or NEE. The experimental treatment that represents the most likely future, with green-up advancing more rapidly than arrival of migratory geese, results in NEE changing by 1.2 µmol m−2 s−1 toward a greater CO2 sink in spring and summer. Increased sink strength, however, may be mitigated by early arrival of migratory geese, which would reduce CO2 uptake. Importantly, while the direct effect of climate warming on phenology of green-up has a minimal influence on NEE, the indirect effect of climate warming manifest through changes in the timing of peak grazing can have a significant impact on C balance in northern coastal wetlands. Furthermore, processes influencing the timing of goose migration in the winter range can significantly influence ecosystem function in summer habitats. © 2018 John Wiley & Sons Ltd
英文关键词	Arctic; ecosystem respiration; greenhouse gas emission; herbivory; net ecosystem exchange; Pacific black brant; phenological mismatch; subarctic
scopus关键词	carbon dioxide; carbon emission; greenhouse gas; herbivory; migratory species; net ecosystem exchange; phenology; respiration; waterfowl; Alaska; United States; Anser; Aves; carbon dioxide; Alaska; animal; carbon cycle; climate change; goose; herbivory; metabolism; physiology; population migration; season; Alaska; Animal Migration; Animals; Carbon Cycle; Carbon Dioxide; Climate Change; Geese; Herbivory; Seasons
来源期刊	Global Change Biology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/176543
作者单位	Department of Natural Resource Management, South Dakota State University, Brookings, SD, United States; Department of Wildland Resources, Utah State University and the Ecology Center, Logan, UT, United States; Department of Biological Sciences, University of Alaska-Anchorage, Anchorage, AK, United States; U.S. Geological Survey Alaska Science Center, Anchorage, AK, United States; UArctic, Ecology and Genetics Research Unit, University of Oulu, Oulu, Finland
推荐引用方式 GB/T 7714	Leffler A.J.,Beard K.H.,Kelsey K.C.,et al. Delayed herbivory by migratory geese increases summer-long CO2 uptake in coastal western Alaska[J],2019,25(1).
APA	Leffler A.J.,Beard K.H.,Kelsey K.C.,Choi R.T.,Schmutz J.A.,&Welker J.M..(2019).Delayed herbivory by migratory geese increases summer-long CO2 uptake in coastal western Alaska.Global Change Biology,25(1).
MLA	Leffler A.J.,et al."Delayed herbivory by migratory geese increases summer-long CO2 uptake in coastal western Alaska".Global Change Biology 25.1(2019).