DOI: 10.1111/gcb.14473
Scopus记录号: 2-s2.0-85056770609
论文题名: Delayed herbivory by migratory geese increases summer-long CO2 uptake in coastal western Alaska
作者: Leffler A.J. ; Beard K.H. ; Kelsey K.C. ; Choi R.T. ; Schmutz J.A. ; Welker J.M.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2019
卷: 25, 期: 1 起始页码: 277
结束页码: 289
语种: 英语
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
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 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117552
Appears in Collections: 气候变化与战略
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Recommended Citation:
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]. Global Change Biology,2019-01-01,25(1)