DOI: 10.1002/2014GB004934
Scopus记录号: 2-s2.0-84920994554
论文题名: Sensitivity of tropical forest aboveground productivity to climate anomalies in SW Costa Rica
作者: Hofhansl F ; , Kobler J ; , Ofner J ; , Drage S ; , Pölz E ; -M ; , Wanek W
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2014
卷: 28, 期: 12 起始页码: 1437
结束页码: 1454
语种: 英语
英文关键词: aboveground net primary production
; canopy production
; Costa Rica
; El Niño-Southern Oscillation
; lowland rainforest
; wood production
Scopus关键词: aboveground biomass
; carbon sequestration
; climate change
; disturbance
; El Nino-Southern Oscillation
; global climate
; lowland environment
; net primary production
; seasonal variation
; sensitivity analysis
; soil fertility
; topography
; tropical forest
; Costa Rica
英文摘要: The productivity of tropical forests is driven by climate (precipitation, temperature, and light) and soil fertility (geology and topography). While large-scale drivers of tropical productivity are well established, knowledge on the sensitivity of tropical lowland net primary production to climate anomalies remains scarce. We here analyze seven consecutive years of monthly recorded tropical forest aboveground net primary production (ANPP) in response to a recent El Niño-Southern Oscillation (ENSO) anomaly. The ENSO transition period resulted in increased temperatures and decreased precipitation during the El Niño dry period, causing a decrease in ANPP. However, the subsequent La Niña wet period caused strong increases in ANPP such that drought-induced reductions were overcompensated. Most strikingly, the climatic controls differed between canopy production (CP) and wood production (WP). Whereas CP showed strong seasonal variation but was not affected by ENSO, WP decreased significantly in response to a 3C increase in annual maximum temperatures during the El Niño period but subsequently recovered to above predrought levels during the La Niña period. Moreover, the climate sensitivity of tropical forest ANPP components was affected by local topography (water availability) and disturbance history (species composition). Our results suggest that projected increases in temperature and dry season length could impact tropical carbon sequestration by shifting ANPP partitioning toward decreased WP, thus decreasing the carbon storage of highly productive lowland forests. We conclude that the impact of climate anomalies on tropical forest productivity is strongly related to local site characteristics and will therefore likely prevent uniform responses of tropical lowland forests to projected global changes. Key Points We study the climate sensitivity of tropical forest aboveground productivityPartitioning of ANPP components may shift in response to climate extremesLocal site characteristics determine the response to climate anomalies ©2014. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77525
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Microbiology and Ecosystem Science, University of Vienna, Austria; Department of Ecosystem Research and Environmental Information Management, Environment Agency, Austria; Department of Biomedical Imaging and Image-guided Therapy, Computational Image Analysis and Radiology Laboratory, Medical University of Vienna, Austria
Recommended Citation:
Hofhansl F,, Kobler J,, Ofner J,et al. Sensitivity of tropical forest aboveground productivity to climate anomalies in SW Costa Rica[J]. Global Biogeochemical Cycles,2014-01-01,28(12)