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Seasonal variations in temperature sensitivity of soil respiration in a larch forest in the Northern Daxing’an Mountains in Northeast China

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Journal of Forestry Research 2022年第3期33卷 1061-1070页

作者： Lin Yang Qiuliang Zhang Zhongtao Ma Huijun Jin Xiaoli Chang Sergey S.Marchenko Valentin V.Spektor College of Forestry and Da Xing’anling Forest Ecosystem Research Station of Inner Mongolia Autonomous Region Inner Mongolia Agricultural UniversityHohhot010019People’s Republic of China Research-Station of Permafrost Geo-Environment Ministry of EducationInstitute of Cold Regions Science and Engineering and School of Civil EngineeringNortheast Forestry UniversityHarbin150040People’s Republic of China State Key Laboratory of Frozen soils Engineering Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou730000People’s Republic of China Geophysical Institute University of Alaska FairbanksFairbanksAK99775USA Laboratory of General Geocryology Melnikov Permafrost InstituteSiberia BranchRussian Academy of SciencesYakutskRussia677010

Temperature sensitivity of respiration of forest soils is important for its responses to climate warming and for the accurate assessment of soil carbon budget. The sensitivity of temperature (T_(i)) to soil respiration rate (R_(s)), and Q_(10) defined by e^(10(lnRs−lna)/Ti) has been used extensively for indicating the sensitivity of soil respiration. The soil respiration under a larch (Larix gmelinii) forest in the northern Daxing’an Mountains, Northeast China was observed in situ from April to September, 2019 using the dynamic chamber method. Air temperatures (T_(air)), soil surface temperatures (T_(0cm)), soil temperatures at depths of 5 and 10 cm (T_(5cm) and T_(10cm), respectively), and soil-surface water vapor concentrations were monitored at the same time. The results show a significant monthly variability in soil respiration rate in the growing season (April–September). The Q_(10) at the surface and at depths of 5 and 10 cm was estimated at 5.6, 6.3, and 7.2, respectively. The Q_(10@10 cm) over the period of surface soil thawing (Q_(10@10 cm, thaw) = 36.89) were significantly higher than that of the growing season (Q_(10@10 cm, growth )= 3.82). Furthermore, the Rs in the early stage of near-surface soil thawing and in the middle of the growing season is more sensitive to changes in soil temperatures. soil temperature is thus the dominant factor for season variations in soil respiration, but rainfall is the main controller for short-term fluctuations in respiration. Thus, the higher sensitivity of soil respiration to temperature (Q_(10)) is found in the middle part of the growing season. The monthly and seasonal Q_(10) values better reflect the responsiveness of soil respiration to changes in hydrometeorology and ground freeze-thaw processes. This study may help assess the stability of the soil carbon pool and strength of carbon fluxes in the larch forested permafrost regions in the northern Daxing’an Mountains.

关键词： soil respiration Dynamic chamber method Ground thawing Major growth period soil temperature

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Response of soil respiration to environmental and photosynthetic factors in different subalpine forest-cover types in a loess alpine hilly region

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Journal of Forestry Research 2022年第2期33卷 653-665页

作者： Yuanhang Li Sha Lin Qi Chen Xinyao Ma Shuaijun Wang Kangning He School of soil and Water Conservation Key Laboratory of State Forestry Administration On Soil and Water ConservationBeijing Forestry UniversityBeijing 100083People’s Republic of China Beijing Engineering Research Center of soil and Water Conservation Beijing Forestry UniversityBeijing 100083People’s Republic of China Engineering Research Center of Forestry Ecological Engineering Ministry of EducationBeijing Forestry UniversityBeijing 100083People’s Republic of China North China Power Engineering Co. Ltd.of China Power Engineering Consulting GroupChangchun 130021People’s Republic of China Power China Huadong Engineering Corporation Limited Hangzhou 311122People’s Republic of China

soil respiration(Rs)is important for transport-ing or fixing carbon dioxide from the atmosphere,and even diminutive variations can profoundly influence the carbon ***,the R_(s) dynamics in a loess alpine hilly region with representative sensitivity to climate change and fragile ecology remains poorly *** study investigated the correlation and degree of control between R_(s) and its photosynthetic and environmental factors in five subalpine forest cover *** examined the correlations between R_(s) and variables temperature(T_(10)) and soil moisture content at 10 cm depth(W_(10)),net photosynthetic rate(P_(n))and soil properties to establish multiple models,and the variables were measured for diurnal and monthly vari-ations from September 2018 to August *** results showed that soil physical factors are not the main drivers of R_(s) dynamics at the diel scale;however,the trend in the monthly variation in R_(s) was consistent with that of T_(10)and P_(n).Further,R_(s) was significantly affected by pH,providing further evidence that coniferous forest leaves contribute to soil acidification,thus reducing R_(s).Significant exponential and linear correlations were established between R_(s) and T_(10)and W_(10),respectively,and R_(s) was positively correlated with P_(n).Accordingly,we established a two-factor model and a three-factor model,and the correlation coefficients(R_(2))was improved to different degrees compared with models based only on T_(10) and W_(10).Moreover,temperature sensitivity(Q_(10))was the highest in the secondary forest and lowest in the Larix principis-rupprechtii *** findings suggest that the control of R_(s) by the environment(moisture and tempera-ture)and photosynthesis,which are interactive or comple-mentary effects,may influence spatial and temporal homeo-stasis in the region and showed that the models appropriately described the dynamic variation in R_(s) and the carbon cycle in different forest *** add

关键词： Loess alpine hilly region soil respiration Environmental factor Photosynthesis factor Q_(10) Two-factor model Three-factor model

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Response of soil respiration to short-term changes in precipitation and nitrogen addition in a desert steppe

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Journal of Arid Land 2023年第9期15卷 1084-1106页

作者： MA Jinpeng PANG Danbo HE Wenqiang ZHANG Yaqi WU Mengyao LI Xuebin CHEN Lin College of Forestry and Prataculture Ningxia UniversityYinchuan 750021China College of Ecological Environment Ningxia UniversityYinchuan 750021China Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in Northwest China Ningxia UniversityYinchuan 750021China

Changes in precipitation and nitrogen(N)addition may significantly affect the processes of soil carbon(C)cycle in terrestrial ecosystems,such as soil ***,relatively few studies have investigated the effects of changes in precipitation and N addition on soil respiration in the upper soil layer in desert *** this study,we conducted a control experiment that involved a field simulation from July 2020 to December 2021 in a desert steppe in Yanchi County,***,we measured soil parameters including soil temperature,soil moisture,total nitrogen(TN),soil organic carbon(SOC),soil microbial biomass carbon(SMBC),soil microbial biomass nitrogen(SMBN),and contents of soil microorganisms including bacteria,fungi,actinomyces,and protozoa,and determined the components of soil respiration including soil respiration with litter(RS+L),soil respiration without litter(RS),and litter respiration(RL)under short-term changes in precipitation(control,increased precipitation by 30%,and decreased precipitation by 30%)and N addition(0.0 and 10.0 g/(m^(2)·a))*** results indicated that short-term changes in precipitation and N addition had substantial positive effects on the contents of TN,SOC,and SMBC,as well as the contents of soil actinomyces and *** addition,N addition significantly enhanced the rates of RS+L and RS by 4.8%and 8.0%(P0.05).The mean RL/RS+L value observed under all treatments was 27.63%,which suggested that RL is an important component of soil respiration in the desert steppe *** results also showed that short-term changes in precipitation and N add

关键词： soil respiration litter respiration nitrogen deposition soil carbon soil microorganisms climate change desert steppe ecosystems

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Aboveground net primary productivity and soil respiration display different responses to precipitation changes in desert grassland

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Journal of Plant Ecology 2022年第1期15卷 57-70页

作者： Lihua Zhang Junfeng Wang Ruifeng Zhao Yafei Guo Lianyi Hao College of Geography and Environment Science Northwest Normal University967 Anning East RoadLanzhou 730070China

Precipitation(PPT)changes affect both aboveground vegetation dynamics and belowground carbon cycling processes,particularly in arid and semiarid ***,it remains unclear how extreme PPT variation can affect soil carbon sequestration potential.A 3-year PPT manipulation experiment with five levels(±40%,±20%and ambient PPT)was conducted in a desert grassland of western Loess *** net primary productivity(ANPP)and soil respiration(Rs)were measured to examine whether the responses of ANPP and Rs to PPT changes displayed a double asymmetry *** ANPP was more sensitive to extreme drought than extreme wet treatments in wet and dry years,which displayed a negative asymmetric *** change in ANPP was mainly due to the direct effect of PPT change,and plant density variation also exerted some influence in the dry *** contrast,Rs displayed a positive asymmetry response to PPT change in dry *** may be ascribed to enhanced autotrophic respiration due to the enhanced positive responses of plant growth and ANPP to wet treatments as well as stronger birch effect of rainfall events on heterotrophic *** saturating response of Rs to extreme drought(−40%PPT treatment)was also found in the dry ***,the response of Rs to PPT change displayed a negative asymmetry model in wet *** contrasting models for ANPP and Rs in response to altered PPT regime suggest that extreme wet or dry treatments may increase soil C pools effluxes toward debt in this desert grassland.

关键词： primary production plant growth soil respiration soil carbon balance extreme precipitation desert grassland asymmetry response

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The response of soil respiration to different N compounds addition in a saline-alkaline grassland of northern China

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Journal of Plant Ecology 2022年第5期15卷 897-910页

作者： Huajie Diao Xiaopeng Chen Ge Wang Qiushi Ning Shuya Hu Wei Sun Kuanhu Dong Changhui Wang College of Grassland Science Shanxi Agricultural UniversityTaigu 030801China State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China Shanxi Key Laboratory of Grassl and Ecological Protection and Native Grass Germplasm Innovation Shanxi Agricultural UniversityTaigu 030801China Youyu Loess Plateau Grassland Ecosystem Research Station Shanxi Agricultural UniversityTaigu 030801China Institute of Grassland Science Key Laboratory of Vegetation Ecology of the Ministry of EducationNortheast Normal UniversityChangchun 130024China

The increase in atmospheric nitrogen(N)deposition has profound effects on soil respiration(SR).However,the responses of SR to the addition of different N compounds,particularly in saline-alkaline grasslands remain unclear.A 3-year controlled field experiment was conducted to investigate the responses of SR to different N compounds(NH,NO,(NH),SO,and NH,HCO,)during the growing seasons in a saline-alkaline grassland located in the agro-pastoral ecotone of northern *** results demonstrated that SR showed a bimodal pattern and a significant interannual diference that was regulated by air or soil temperature and *** addition had a significant effect on SR,and the effect of N addition on SR varied yearly,which was related to seasonal *** mean SR across 3 years(2017-2019)was increased by 19.9%,13.0%and 16.6%with the addition of NH,NO,(NH,),SO,and NH,HCO3,*** highest effect of NH,NO3 addition on SR across 3 years was ascribed to the highest aboveground net primary production,belowground net primary production(BNPP)and soil NO,-***(C loss)was significantly increased while plant productivity(C input)did not significantly change under NH,HCO,addition,indicating a decrease in C *** addition,BNPP was the main direct factor influencing SR in this saline-alkaline grassland,and soil salinization(*** base cations and pH)indirectly affected SR through soil ***,NH,NO,addition overestimated the response of SR to N addition,and different N compounds should be considered,especially in saline-alkaline grassland.

关键词： nitrogen compounds soil respiration soil microorganism plant biomass saline-alkaline grassland

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Carbon inputs regulate the temperature sensitivity of soil respiration in temperate forests

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Journal of Arid Land 2022年第9期14卷 1055-1068页

作者： LIU Yulin LI Jiwei HAI Xuying WU Jianzhao DONG Lingbo PAN Yingjie SHANGGUAN Zhouping WANG Kaibo DENG Lei State Key Laboratory of soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water ConservationChinese Academy of Sciences and Ministry of Water ResourcesYangling 712100China University of Chinese Academy of Sciences Beijing 100049China Institute of soil and Water Conservation Northwest Agriculture and Forestry UniversityYangling 712100China State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi'an 710075China

Litter and root activities may alter the temperature sensitivity(Q_(10))of soil ***,existing studies have not provided a comprehensive understanding of the effects of litter and root carbon inputs on the Q_(10)of soil respiration in different *** this study,we used the trench method under in situ conditions to measure the total soil respiration(R_(total)),litter-removed soil respiration(R_(no-litter)),root-removed soil respiration(R_(no-root)),and the decomposition of soil organic matter(i.e.,both litter and root removal;R_(SOM))in different seasons of pioneer(Populus davidiana Dode)and climax(Quercus liaotungensis Mary)forests on the Loess Plateau,*** temperature,soil moisture,litter biomass,fine root biomass,litter carbon,and root carbon were analyzed to obtain the drive mechanism of the Q_(10)of soil respiration in the two *** results showed that the Q_(10)of soil respiration exhibited seasonality,and the Q_(10)of soil respiration was higher in *** litter enhanced the Q_(10)of soil respiration considerably more than the root *** temperature,soil moisture,fine root biomass,and litter carbon were the main factors used to predict the Q_(10)of different soil respiration *** findings indicated that factors affecting the Q_(10)of soil respiration highly depended on soil temperature and soil moisture as well as related litter and root traits in the two forests,which can improve our understanding of soil carbon–climate feedback in global *** results of this study can provide reference for exploring soil respiration under temperate forest restoration.

关键词： litter biomass root carbon soil respiration temperate forests Loess Plateau

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Laboratory simulation of soil respiration response to environmental conditions in intertidal zones of Jiangsu Province,China

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Water Science and Engineering 2022年第2期15卷 134-140页

作者： Peng Wang Xia Shen Zu-lin Hua Xiao-dong Liu Yi-xin Ma Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education Hohai UniversityNanjing 210098China Yangtze Institute for Conservation and Development Hohai UniversityNanjing 210098China Key Laboratory of Ocean Space Resource Management Technology of Ministry of Natural Resources Hangzhou 310012China State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Nanjing Hydraulic Research InstituteNanjing 210029China

As major contributor to the blue carbon sink,intertidal zones play a crucial role in the global carbon *** recent years,more attention has been given to the carbon cycle in intertidal ***,due to highly variable and uncertain environmental conditions,it is difficult to clarify the quantitative relationship between soil respiration and environmental factors through in-situ *** this study,the response of soil respiration characteristics to variations in the temperature and water table was investigated using a monitoring apparatus of CO_(2)flux at the soil-air interface in the intertidal *** results showed that soil respiration flux was significantly correlated with temperature,and the correlation best fitted the DoseResp ***,the respiration flux was enhanced with the descent of water table,a relationship could be described by a quadratic *** effect of the water table on soil respiration became more pronounced with the rise of *** results provide significant clarification of the impact of human activities on the carbon cycle in bare intertidal zones and as well as support for numerical simulations of the carbon cycle in bare intertidal zones.

关键词： Intertidal zone Carbon flux soil respiration Human activities Water table

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Seasonal Changes in soil respiration with An Elevation Gradient in Abies nephrolepis(Trautv.)*** in North China

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Phyton-International Journal of Experimental Botany 2022年第7期91卷 1543-1556页

作者： Zhijie Tian Xueying Jia Tingting Liu Eryan Ma Lamei Xue Yanqiu Hu Qingrong Zheng Xinzhou Teachers University Xinzhou034000China School of Geography Science Taiyuan Normal UniversityTaiyuan030619China

soil respiration(Rs)plays an important role in regulating carbon cycle of terrestrial ecosystems and presents temporal and spatial *** nephrolepis is a tree species that prefers the cold and wet environment and is mainly distributed in Northeast Asia and East *** Rs variations of Abies nephrolepis forests communities are generally environmental-sensitive and can effectively reflect the adaptive responses of forest ecosystems to climate *** this study,the growing-seasonal variations of Rs,soil temperature,soil water content and soil properties of Abies nephrolepis forests were analyzed along an altitude gradient(2000,2100,2200 and 2300 m)over two years on Wutai Mountain in North *** the main results showed,soil respiration keeps the same change trend as soil temperature and reached peaks in July at 2000 m in 2019 and *** 26th July to 25th October in 2019 and 27th May to 23rd October in 2020,on the whole,the soil temperature independently explained 76.2%of Rs variations while the soil water content independently explained 26.8%.soil temperature and soil water content jointly explained 81.8%of Rs *** properties explained 61.8%and 69.6%of Rs variation in 2019 and 2020,*** organic carbon content and soil enzyme activity had the signifi-cant(Psoil respiration temperature sensitivity(Q10)and the soil organic carbon content increased by 12.4%and 10.4%,respectively,while invertase activity,cellulase activity and urease activity dropped by 41.2%,29.45%and 38.19%,*** results demonstrate that(1)soil temperature is the major factor affecting Rs variations in Abies nephrolepis forests;(2)weakened microbial carbon metabolism in high-altitude areas results in the accumulation of soil organic carbon;(3)with a higher Q10,forest ecosystems in high-altitude areas might be more easily affected

关键词： soil respiration Abies nephrolepis altitude soil respiration temperature sensitivity soil organic carbon

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Warming Stimulated soil respiration in a Subalpine Meadow in North China

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Wuhan University Journal of Natural Sciences 2023年第1期28卷 77-87页

作者： LUO Shuzheng ZHANG Jianhua ZHANG Hufang ZHENG Qingrong GAO Yongping LI Meihong Department of Biological Sciences Xinzhou Teachers UniversityXinzhou 034000ShanxiChina Department of Geography Xinzhou Teachers UniversityXinzhou 034000ShanxiChina Shanxi Provincial Wutai Mountain State Forestry Administration Xinzhou 034000ShanxiChina Shanxi Provincial Nature Reserve of Abies nephrolepis Xinzhou 034000ShanxiChina

In order to explore the response of soil respiration in grassland to global warming,we carried out a warming experiment with open top chambers(OTCs)in the subalpine meadow,Mount Wutai in north *** results showed in the subalpine meadow across 2500-2700 m above the sea level(ASL),with OTCs,soil respiration increased by 2.00μmol·m^(-2)·s^(-1)as soil temperature increased by 1.25℃on *** decreased soil moisture over the experiment periods except in October 2019 when snow melted in *** effect on soil respiration peaked at 178.31%in October *** control and warming treatment,based on exponential regression equations,soil temperature alone accounted for 85.3%and 61.2%of soil respiration variation,*** control treatment soil moisture alone explained 23.2%of soil respiration variation based on the power regression equation while in warming treatment they were not significantly correlated with each *** response of soil respiration to warming relied on altitudes as well as the time of the year,but was not inhibited by soil moisture,labile carbon pool,and available *** concluded soil temperature was the main factor influencing soil respiration,and global warming would stimulate soil respiration in the subalpine meadows of Mount Wutai in the *** analysis provided new data on characteristics and mechanisms of the response of soil respiration to warming,and helped to further understand the relationship between carbon cycle and climate change.

关键词： global warming soil respiration open top chambers(OTCs) the subalpine meadow Mount Wutai

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soil respiration in typical plant communities in the wetland surrounding the high-salinity Ebinur Lake

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Frontiers of Earth Science 2018年第3期12卷 611-624页

作者： Yanhong LI Mingliang ZHAO Fadong LI Xinjiang Normal University College of Geography and Tourism Urumqi 830054 China Key Laboratory of Xinjiang Uygur Autonomous Region Xinjiang Laboratory of Lake Environment and Resources in Arid Area Urumqi 830054 China Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China College of Resources and Environment University of Chinese Academy of Sciences Beijing 100190 China

soil respiration in wetlands surrounding lakes is a vital component of the soil carbon cycle in arid regions. However, information remains limited on the soil respiration around highly saline lakes during the plant growing season. Here, we aimed to evaluate diurnal and seasonal variation in soil respiration to elucidate the controlling factors in the wetland of Ebinur Lake, Xinjiang Uygur Autonomous Region, western China. We used a soil carbon flux automatic analyzer （LI-840A） to measure soil respiration rates during the growing season （April to November） in two fields covered by reeds and tamarisk and one field with no vegetation （bare soil） from 2015 to 2016. The results showed a single peak in the diurnal pattern of soil respiration from 11：00 to 17：00 for plots covered in reeds, tamarisk, and bare soil, with minimum values being detected from 03：00 to 07：00. During the growing season, the soil respiration of reeds and tamarisk peaked during the thriving period （4.16 and 3.75 μmol.m-2.s-1, respectively）, while that of bare soil peaked during the intermediate growth period （0.74 pmol-m-2-s-1）. The soil respiration in all three plots was lowest during the wintering period （0.08, 0.09, and -0.87 μmol.m-2.s-1, respectively）. Air temperature and relative humidity significantly influenced soil respiration. A significant linear relationship was detected between soil respiration and soil temperature for reeds, tamarisk, and bare soil. The average Q10 of reeds and tamarisk were larger than that of bare soil. However, soil moisture content was not the main factor controlling soil respiration. soil respiration was negatively correlated with soil pH and soil salinity in all three plot types. In contrast, soil respiration was positively correlated with organic carbon. Overall,CO2 emissions and greenhouse gases had a relatively weak effect on the wetlands surrounding the highly saline Ebinur Lake.

关键词： Ebinur Lake soil respiration high salinity soil temperature soil moisture

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