Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/aaacbc |
Effect of drought on productivity in a Costa Rican tropical dry forest | |
Castro, S. M.1; Sanchez-Azofeifa, G. A.1; Sato, H.2 | |
2018-04-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2018 |
卷号 | 13期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada |
英文摘要 | Climate models predict that precipitation patterns in tropical dry forests (TDFs) will change, with an overall reduction in rainfall amount and intensification of dry intervals, leading to greater susceptibility to drought. In this paper, we explore the effect of drought on phenology and carbon dynamics of a secondary TDF located in the Santa Rosa National Park (SRNP), Costa Rica. Through the use of optical sensors and an eddy covariance flux tower, seasonal phenology and carbon fluxes were monitored over a four-year period (2013-2016). Over this time frame, annual precipitation varied considerably. Total precipitation amounts for the 2013-2016 seasons equaled 1591.8 mm (+14.4 mm SD), 1112.9 mm (+9.9 mm SD), 600.8 mm (+7.6 mm SD), and 1762.2 mm (+13.9 mm SD), respectively. The 2014 and 2015 (ENSO) seasonal precipitation amounts represent a 30% and 63% reduction in precipitation, respectively, and were designated as drought seasons. Phenology was affected by precipitation patterns and availability. The onset of green-up was closely associated with pre-seasonal rains. Drought events lead to seasonal NDVI minimums and changes in phenologic cycle length. Carbon fluxes, assimilation, and photosynthetic light use efficiency were negatively affected by drought. Seasonal minimums in photosynthetic rates and light use efficiency were observed during drought events, and gross primary productivity was reduced by 13% and 42% during drought seasons 2014 and 2015, respectively. However, all four growth seasons were net carbon sinks. Results from this study contribute towards a deeper understanding of the impact of drought on TDF phenology and carbon dynamics. |
英文关键词 | tropical dry forest eddy covariance drought gross primary productivity phenology |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000427615400001 |
WOS关键词 | NET ECOSYSTEM EXCHANGE ; CARBON-DIOXIDE ; RAIN-FORESTS ; PHENOLOGY ; DECOMPOSITION ; RESPIRATION ; SEASONALITY ; SUCCESSION ; MODEL ; CO2 |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/35391 |
专题 | 气候变化 |
作者单位 | 1.Univ Alberta, Dept Earth & Atmospher Sci, Edmonton, AB, Canada; 2.Univ Toronto, Dept Earth Sci, Toronto, ON, Canada |
推荐引用方式 GB/T 7714 | Castro, S. M.,Sanchez-Azofeifa, G. A.,Sato, H.. Effect of drought on productivity in a Costa Rican tropical dry forest[J]. ENVIRONMENTAL RESEARCH LETTERS,2018,13(4). |
APA | Castro, S. M.,Sanchez-Azofeifa, G. A.,&Sato, H..(2018).Effect of drought on productivity in a Costa Rican tropical dry forest.ENVIRONMENTAL RESEARCH LETTERS,13(4). |
MLA | Castro, S. M.,et al."Effect of drought on productivity in a Costa Rican tropical dry forest".ENVIRONMENTAL RESEARCH LETTERS 13.4(2018). |
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