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Effects of seasonal variation on soil microbial community structure and enzyme activity in a Masson pine forest in Southwest China

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Journal of Mountain Science 2020年第6期17卷 1398-1409页

作者： LUO Song-ping HE Bing-hui ZENG Qing-ping LI Nan-jie YANG Lei College of Resources and Environment Southwest UniversityChongqing 400715China Technology Consulting Research Center of Soil and Water Conservation of Guizhou Province Guiyang 550002China Chongqing Engineering Technology Research Center for Information Management in Development Chongqing Technology and Business UniversityChongqing 400067China State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China

Soil microbial communities and enzyme activities play key roles in soil *** are sensitive to changes in environmental factors,including seasonal temperature,precipitation variations and soil *** understand the interactive mechanisms of seasonal changes that affect soil microbial communities and enzyme activities in a subtropical masson pine(Pinus massoniana)forest,we investigated the soil microbial community structure and enzyme activities to identify the effect of seasonal changes on the soil microbial community for two years in Jinyun Mountain National Nature Reserve,Chongqing,*** soil microbial community structure was investigated using phospholipid fatty acids(PLFAs).The results indicated that a total of 36 different PLFAs were identified,and 16:0 was found in the highest proportions in the four seasons,moreover,the total PLFAs abundance were highest in spring and lowest in *** and actinomycetes were the dominant types in the study *** changes also had a significant(Pseasonal shifts in soil community composition and enzyme activities were relatively more sensitive to soil moisture and temperature,but the microbial community structure and enzyme activity were not correlated with soil pH in the study *** study highlights how the seasonal variations affect the microbial community and function(enzyme activity)to better understand and predict microbial responses to future climate regimes in subtropical area.

关键词： PLFA analysis Soil microorganisms soil enzymes seasonal shifts Soil moisture Soil temperature

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Effects of seasonal variations on soil microbial community composition of two typical zonal vegetation types in the Wuyi Mountains

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Journal of Mountain Science 2016年第6期13卷 1056-1065页

作者： WU Ze-yan LIN Wen-xiong LI Jian-ju LIU Jin-fu LI Bai-lian WU Lin-kun FANG Chang-xun ZHANG Zhi-xing Life Sciences College of Fujian Agriculture and Forestry University Fuzhou 350002 China Ecological Complexity and Modeling Laboratory University of California Riverside Riverside CA92507 USA Forestry College of Fujian Agriculture and Forestry University Fuzhou 350002 China Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring School of Life Sciences Fujian Agriculture and Forestry University Fuzhou 350002 China Key Laboratory of Crop Ecology and Molecular Physiology (Fujian Agriculture and Forestry University) Fujian Province University Fuzhou 350002 China

seasonal shifts play an important role in soil microbial community composition. This study examined the hypothesis that soil microbial community structure would vary with seasonal shifts in the Wuyi Mountains in Southeast China, and that two representative tree species （Castanopisi carlesii and Cunninghamia lanceolata） may have different soil microbial community composition. Phospholipids fatty acid analysis （PLFA） of seasonal shifts and was used to assess the effect vegetation types on soil microbial community structure. A total of 22 different PLFAs were identified from all the soil samples. The bacterial PLFAs accounted for 62.37% of the total PLFAs, followed by fungi （28.94%）, and the minimum was actinomycetes （6.41%）. Overall, the level of PLFAs in C. carlesii soil was greater than those in C. lanceolata soil, and significant differences were observed in some seasons. The amounts of total, bacteria, actinomycic and fungal PLFAs significantly changed with the seasons and followed a sequence order （summer 〉 autumn 〉 spring 〉 winter）. The bacteria/fungi PLFAs and G （＋）/G （-） PLFAs of two vegetation types also changed with the seasons and the ratios in summer and autumn were higher than those in spring and winter. The correlation analysis of microbial PLFAs and soil physicochemical properties showed that the total, bacteria, fungal, actinomycic, G （＋） and G （-） PLFAs were significantly positive correlation with TOC, TN, TP, TK and moisture content. We concluded that the seasonal shifts and vegetation types affect soil microbial community composition by changing the soil physicochemical properties.

关键词： seasonal shifts Soil microbes Community composition Castanopisi carlesii Cunninghamia lanceolata

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