生态学杂志2024，Vol.43Issue(11)：3341-3349,9.DOI:10.13292/j.1000-4890.202411.011
西双版纳热带季节雨林土壤含水量的时空格局及其与降水的关联
Spatial-temporal pattern of soil water content and its response to precipitation in a tropical seasonal rain-forest in Xishuangbanna
摘要
Abstract
To understand the spatial-temporal dynamics of soil water content under precipitation fluctuations espe-cially extreme precipitations in tropical seasonal rainforest,we analyzed 15 years(2006-2020)data of soil water content at different depths(up to 110 cm)and precipitations in a tropical seasonal rainforest of Xishuangbanna.We found that the annual average soil water content remained stable over the 15 years with a relatively low interannual coefficient of variation(CV).But we detected a pattern of obvious seasonal dynamic because CV of the rainy sea-son was significantly higher than that of the dry season.In addition,soil water content generally followed a"C"shape pattern along the soil vertical profile.Specifically,soil water contents in both shallow and deep depths were significantly higher than that in middle depths.In recent years,extreme precipitation events occurred frequently in Xishuangbanna,with increasing precipitation fluctuation.However,changes of soil water content did not follow the trend of precipitation but rather remained relatively stable through the spatio-temporal dynamic balance of soil water loss and recharge across seasons and soil depths.Our results highlight that the tropical seasonal rainforest in Xishuangbanna could maintain soil water content under fluctuation of precipitations,even extreme ones.Xishuang-banna tropical seasonal rainforest shows a strong ability to regulate soil water content and therefore to conserve water resources.This study provides empirical support for understanding the important ecological functions of tropical sea-sonal rainforests.关键词
土壤水分/降水/热带森林/水源涵养/气候变化Key words
soil water content/precipitation/tropical forest/water conservation/climate change引用本文复制引用
李嘉媛,刘露露,杨斌,罗艳,白林忠,卢华正,宋亮..西双版纳热带季节雨林土壤含水量的时空格局及其与降水的关联[J].生态学杂志,2024,43(11):3341-3349,9.基金项目
国家自然科学基金项目(32171529和32171557)、云南省基础研究专项项目(202403AC00028)、云南省"兴滇英才支持计划"青年人才项目(YNWR-QNBJ-2020-066)和中国科学院西双版纳热带植物园"十四五"科技创新规划项目(E32KFF7B01)资助. （32171529和32171557）
