干旱和湿润地区森林土壤微生物群落对降水改变的不同响应  

Differential Responses of Microbial Communities to Precipitation Changes in Forest Soils Between Arid and Humid Areas

作　　者：陈晓琳 吴福忠 岳楷 倪祥银 CHEN Xiaolin;WU Fuzhong;YUE Kai;NI Xiangyin(School of Geographical Sciences,Fujian Normal University,Fuzhou 350117,China;Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education,Fujian Normal University,Fuzhou 350117,China;Fujian Sanming Forest Ecosystem National Observation and Research Station,Sanming 365002,Fujian,China)

机构地区：[1]福建师范大学地理科学学院,福州350117 [2]福建师范大学湿润亚热带生态地理过程教育部重点实验室,福州350117 [3]福建三明森林生态系统国家野外科学观测研究站,福建三明365002

出　　处：《亚热带资源与环境学报》2022年第4期1-8,共8页Journal of Subtropical Resources and Environment

基　　金：国家自然科学基金优青项目(32022056);国家自然科学基金青年项目(32101519);国家自然科学基金面上项目(32171641)。

摘　　要：通过整合已发表的关于降水改变(增加降水或减少降水)条件下森林土壤磷脂脂肪酸(PLFAs)的配对数据,分析了增加降水和减少降水对全球森林土壤微生物群落的影响,探究了干旱地区和湿润地区森林土壤微生物群落对降水改变的响应。结果表明:增加降水分别使真菌、细菌和总的PLFAs显著增加了22%、33%和30%;减少降水分别使真菌和总的PLFAs显著降低了18%和8%。增加降水和减少降水均没有显著改变真菌/细菌比值。增加降水对湿润地区森林土壤PLFAs的影响大于干旱地区,减少降水对干旱地区森林土壤PLFAs的影响大于湿润地区。此外,总的PLFAs对降水改变的响应还受降水改变的强度、气候和土壤因子的影响,这些因素的影响程度在干旱地区和湿润地区表现出明显的差异。区分干旱地区和湿润地区有利于更准确地评估森林土壤微生物群落对降水改变的响应。This study compiled paired observations of PLFAs under increased or decreased precipitation conditions to assess the effects of precipitation changes on the soil microbial community evaluated by PLFAs across global forests.It also assessed the responses of microbial communities to precipitation changes under dry and wet conditions.The results showed that an increase in precipitation had triggered the fungal,bacterial,and total PLFAs raised largely by 22%,33%,and 30%,respectively.On the contrary,a decrease in precipitation has significantly reduced the fungal and total PLFAs by 18%and 8%,respectively.However,the ratio of fungal to bacterial PLFAs was not changed under both increased and decreased precipitation patterns.Moreover,the effect of increased precipitation on PLFAs was greater in humid areas than in arid areas,whereas the effect of decreased precipitation on PLFAs was greater in arid areas than in humid areas.In addition,the responses of the microbial community to precipitation changes were controlled by the intensity of precipitation change,climate,and edaphic factors,but the degree of influence varied greatly between arid and humid areas.Distinguishing arid and humid areas is conductive to assess the response of microbial communities in forest soils to precipitation change more accurately.

关 键 词：降水改变 干旱地区 湿润地区 森林土壤 磷脂脂肪酸(PLFAs) 

分 类 号：S154.36[农业科学—土壤学]