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Impacts of changed litter inputs on soil CO2 efflux in three forest types in central south China

Science Bulletin 2013年第7期58卷 750-757页

作者： YAN WenDe CHEN XiaoYong TIAN DaLun PENG YuanYing WANG GuangJun ZHENG Wei National Engineering Laboratory for Applied Forest Ecological Technology in Southern China Natural Sciences Division College of DuPage College of Arts and Sciences Governors State UniversityUniversity Park College of Life Science and Technology Central South University of Forestry and Technology

Climate change is expected to cause the alteration of litter production in forests,which may result in substantial changes in soil CO2 efflux (FCO2) process as litter represents a major pathway of carbon from vegetation to the *** this study,we conducted an aboveground litter manipulation experiment to examine the influence of litter addition and exclusion on soil FCO2 in Camphor tree,Masson pine,and mixed Camphor tree and Masson pine forests in central south *** input manipulation included three treatments:non-litter input (litter exclusion),double litter input (litter addition),and natural litter input (control).On average,litter exclusion significantly reduced soil FCO2 rate by approximately 39%,24% and 22% in Camphor tree forests,the Mixed forests,and Masson pine forests,*** a yearly basis,double litter addition significantly increased soil CO2 by 12% in the Mixed forests (P=0.02) but not in both Camphor tree and Masson pine forests (P>0.05),when compared with their corresponding control ***,litter addition increased soil FCO2 rates in the months of June-August in Camphor tree and Masson pine forests,coinciding with high soil temperature of summer *** exclusion reduced soil FCO2 more than litter addition increased it in the study *** of soil respiration to litter input treatments varied with forest *** input treatments did not alter the seasonal patterns of soil temperature and soil water *** results indicated that changes in aboveground litter as a result of global climate change and/or forest management have a great potential to alter soil respiration and soil carbon balance in forest ecosystems.

关键词： soil respiration litter exclusion litter addition subtropical forests soil environmental factors

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Considerable impacts of litter inputs on soil nematode community composition in a young Acacia crassicapa plantation

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Soil Ecology Letters 2021年第2期3卷 145-155页

作者： CANCAN ZHAO YIN LI CHENLU ZHANG Yuan Miao Mengzhou Liu Wanlin Zhuang Yuanhu Shao Weixin Zhang Shenglei Fu International Joint Research Laboratory for Global Change Ecology Laboratory of Biodiversity Conservation and Ecological RestorationSchool of Life SciencesHenan UniversityKaifeng 475004China Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions Ministry of EducationCollege of Environment and PlanningHenan UniversityKaifeng 475004China Henan Key Laboratory of Integrated Air Pollution Control and Ecological Security Kaifeng 475004China

Aboveground litter inputs and root exudates provide basal resources for soil communities,however,their relative contributions to soil food web are still not well ***,we conducted a field manipulative experiment to differentiate the effects of litter inputs and living root on nematode community composition of surface and subsoils in a young Acacia crassicapa plantation in southern *** results showed that both litter addition and root presence significantly enhanced soil nematode abundance by 17.3%and 35.3%,*** addition altered nematode trophic group composition,decreased fungivore to bacterivore ratio,and enhanced maturity index and structure index,which led to a bacterial-based energy channel and a more complex food web ***,root presence had a limited impact on the nematode community composition and ecological *** nematodes surface assembly,soil depth did not affect nematode trophic group composition or ecological *** findings highlight the importance of litter inputs in shaping soil nematode community structure and regulating soil energy channel.

关键词： litter addition Root exudates Nematode community composition Soil depth Nematode ecological index

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Impacts of changed litter inputs on soil CO_2 efflux in three forest types in central south China

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Science China(Technological Sciences) 2013年第3期56卷 750-757页

作者： YAN WenDe CHEN XiaoYong TIAN DaLun PENG YuanYing WANG GuangJun ZHENG Wei National Engineering Laboratory for Applied Forest Ecological Technology in Southern China College of Life Science and Technology Central South University of Forestry and Technology College of Arts and Sciences Governors State UniversityUniversity Park Natural Sciences Division College of DuPage

Climate change is expected to cause the alteration of litter production in forests, which may result in substantial changes in soil CO2 effiux （FCO2） process as litter represents a major pathway of carbon from vegetation to the soils. In this study, we conducted an aboveground litter manipulation experiment to examine the influence of litter addition and exclusion on soil FCO2 in Camphor tree, Masson pine, and mixed Camphor tree and Masson pine forests in central south China. litter input manipulation included three treatments： nonqitter input （litter exclusion）, double litter input （litter addition）, and natural litter input （control）. On average, litter exclusion significantly reduced soil FCO2 rate by approximately 39%, 24% and 22% in Camphor tree forests, the Mixed forests, and Masson pine forests, respectively. On a yearly basis, double litter addition significantly increased soil CO2 by 12% in the Mixed forests （P=0.02） but not in both Camphor tree and Masson pine forests （P〉0.05）, when compared with their corre- sponding control treatments. However, litter addition increased soil FCO2 rates in the months of June-August in Camphor tree and Masson pine forests, coinciding with high soil temperature of summer conditions. litter exclusion reduced soil FCO2 more than litter addition increased it in the study sites. Responses of soil respiration to litter input treatments varied with forest types. litter input treatments did not alter the seasonal patterns of soil temperature and soil water content. Our results indicated that changes in aboveground litter as a result of global climate change and/or forest management have a great potential to alter soil respiration and soil carbon balance in forest ecosystems.

关键词： soil respiration litter exclusion litter addition subtropical forests soil environmental factors

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