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Spatial patterns nitrogen transfer models of ectomycorrhizal networks in a Mongolian scotch pine plantation

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Journal of Forestry Research 2018年第2期29卷 337-344页

作者： Yanbin Liu Hongmei Chen pu mou College of Life Science Beijing Normal UniversityBeijing 100875People’s Republic of China Institute of Forestry Science Heilongjiang Academy of ForestryHarbin 150081People’s Republic of China Institute of Biology University of LeipzigJohannisallee 2104103 LeipzigGermany State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing 100875People’s Republic of China

Ectomycorrhizal(EM)networks provide a variety of services to plants and ecosystems include nutrient uptake and transfer,seedling survival,internal cycling of nutrients,plant competition,and so *** deeply their structure and function in ecosystems,we investigated the spatial patterns and nitrogen(N)transfer of EM networks usingN labelling technique in a Mongolian scotch pine(Pinus sylvestris *** Litv.)plantation in Northeastern *** August 2011,four plots(20 × 20 m)were set up in the plantation.125 ml 5 at.%0.15 mol/LNHNOsolution was injected into soil at the center of each *** and 2,6,30 and 215 days after theN application,needles(current year)of each pine were sampled along four 12 m sampling *** total N andN concentrations were *** observed needle N andN concentrations increased significantly over time afterN application,up to 31 and0.42%,*** was no correlation between needle N concentration andN/N ratio(R2=0.40,n=5,P=0.156),while excess needle N concentration and excess needleN/N ratio were positively correlated across different time intervals(R~2=0.89,n=4,P\0.05),but deceased with time interval ***/N ratio increased with time,but it was not correlated with ***/N ratio was negative with distance before and 6th day and 30th day,positive with distance at 2nd day,but the trend was considerably weaker,their slop were close to *** results demonstrated that EM networks were ubiquitous and uniformly distributed in the Mongolian scotch pine plantation and a random *** found N transfer efficiency was very high,absorbed N by EM network was transferred as wide as possible,we observed N uptake of plant had strong bias forN andN,namely N *** the structure and function of EM networks in ecosystems may lead to a deeper understanding of ecological stability and evolution,and thus provide new theoretical approaches to improve conservation practices for the ma

关键词： Ectomycorrhizal networks Spatial patterns Nitrogen transfer Mongolian scotch pine plantation Stable isotope 15N labelling

Nutrient Composition and Distance from Point Placement to the Plant Affect Rice Growth

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Pedosphere 2018年第1期28卷 124-134页

作者： HU Fengqin WANG Huoyan mou pu ZHOU Jianmin State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Ministry of Education Key Laboratory for Biodiversity Sciences and Ecological Engineering College of Life Sciences Beijing Normal University

Point placement of urea is an efficient technology to improve urea use efficiency in transplanted rice(Oryza sativa L.), but it is largely unknown how nutrient composition in the point placement and the distance from placement site to the plant influence rice root distribution and growth, nutrient uptake, and rice grain yield. A controlled greenhouse experiment was conducted using both N-and P-deficient soil with point placement of N only or N and P together(N + P) at a distance close to or far from the plant,in comparison to an N-spilt application and a no-N control. Both nutrient composition and distance significantly affected rice root growth. Compared with the N point placement, the N + P point placement led to smaller root length and mass densities, higher specific root length(SRL) around the placement site, smaller root system, higher straw mass and grain yield, and higher N and P uptake. The difference between the N + P and N point placements was greater when close to the plant than when far from the plant. It is suggested that higher SRL around the placement site is essential for improving nutrient uptake and rice grain yield, and simultaneous point placement of N and P has a synergistic effect on rice growth.

关键词： N use efficiency nutrient uptake phosphate rice yield root growth urea

Elusive cats in our backyards:persistence of the North Chinese leopard(Panthera pardus japonensis)in a human-dominated landscape in central China

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Integrative Zoology 2021年第1期16卷 67-83页

作者： Haitao YANG Bing XIE Guojing ZHAO Yinan GONG pu mou Jianping GE Limin FENG National Forestry and Grassland Administration Amur Tiger and Amur Leopard Monitoring and Research Center Northeast Tiger and Leopard Biodiversity National Observation and Research StationMinistry of Education Key Laboratory for Biodiversity Science and EngineeringCollege of Life SciencesBeijing Normal UniversityBeijingChina Behavioural Ecology Group Section for Ecology and EvolutionDepartment of BiologyUniversity of CopenhagenDenmark

The North Chinese leopard(Panthera pardus japonensis),the least-known big cat,disappeared in most historical range for decades,following the development of modern ***,we have scarce knowledge about the status of this big cat so far,apart from anecdotal *** this study,we investigated density,distribution,and habitat use of the leopard,the apex predator,in a complex forest landscape in the Loess *** used a camera-trapping network to obtain population estimates for leopards over 2 years through spatially explicit capture-recapture *** results,based on maximum likelihood and Bayesian/MCMC methods,reveal that the largest wild population of the leopard was found widely distributed in remnant forests in central Loess *** population is increasing in our study area,and the density of leopards(1.70(SE=0.48)−2.40(SE=0.67)/100 km^(2))is higher than other areas of *** to the analysis of 2 seasonal occupancy models,prey species drive partially the leopard habitat use,predicting that the big cat thrives from the recovery of prey ***,human disturbances,especially oil wells,seem to have negative impacts on the habitat use of ***,it is necessary to have joint efforts by the government and researchers to improve human disturbances management and prey species population density,as well as strengthen the investment in research on the North Chinese leopard,which could all further strengthen protection ability and ensure the long-term survival of this species.

关键词： habitat use North Chinese leopard occupancy population size spatially explicit capture-recapture

Evaluation of regeneration potential of Pinus koraiensis in mixed pine-hardwood forests in the Xiao Xing'an mountains,China

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Journal of Forestry Research 2012年第4期23卷 543-551页

作者： LI Yun-bin mou pu WANG Tian-ming GE Jianping College of Life Sciences Beijing Normal UniversityBeijing100875 China

Large scale harvest of Korean pine （Pinus koraiensis） seeds as a food product in the mixed Korean pine-hardwood forest of northeastern China poses a serious threat to the sustainability and restoration of this endangered regional ecosystem. Seed collection over past decades greatly reduced the seed bank and subsequent seedling and sapling re- cruitment, and impacting a wide array of granivorous animals that rely on the pine seeds. We surveyed Korean pine seeds, including solid seeds （SS）, insect consumed seeds （ICS） and other （animal） consumed （OCS） kernels, of the seed bank （forest floor and the top 10 cm of mineral soil）, the seedlings and saplings from 1 m： sample plots in five forest types in Liangshui Nature Reserve （LNR） of the southern Xiao Xing＇an moun- tains in northeastern China to provide accurate information for assessing the Korean pine regeneration potential. The average number of pine seeds in the seed bank were 11.2 seeds/m2, 9.1 seeds/m2, 4.6 seeds/m2, 1.1 seeds/m2, and 0.2 seeds/m2 in Korean pine-basswood forest, mixed Korean pine-hardwood forest, mixed conifer-hardwood forest, white birch forests, and oak forests, respectively. In the first three forest types, percentages of SS （potentially viable seeds） were 11.2%, 3.5% and 27.8%, respectively. The percentages of ICS （not viable seeds） were consistent at around 35%. The higher but variable percentages of OCS （not viable seeds） indicated high seed predation in these forests. Com- pared with other studies, we recorded higher percentages of seed damage, probably due to our survey approach and the increased depth of seed bank sampled in our study. Depletion of pine seeds in the seed bank greatly reduced seedling and sapling recruitment. Densities of pine seed- lings varied from about 180 trees/ha in the mixed Korean pine-hardwood forest to about 5,400 trees/ha in the mixed conifer-hardwood forests and showed a high degree of spatial variation. Saplings were rare in the mixed Korean pine-hardwood fore

关键词： Pinus koraiensis seed bank pine regeneration seed predation

Soil carbon dynamics in a Pinus massoniana plantation following clear-cutting and slash removal

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Journal of Plant Ecology 2016年第1期9卷 20-29页

作者： Yuan Wen Jamie LSchuler Shirong Liu pu mou Hui Wang Haolong Yu Jingxin Wang College of Life Sciences Beijing Normal UniversityNo.19 Xin Jie Kou Wai StreetBeijing 100875China Key Laboratory of Forest Ecology and Environment China’s State Forestry AdministrationInstitute of Forest EcologyEnvironment and ProtectionChinese Academy of ForestryNo.2 DongxiaofuBeijing 100091China Division of Forestry and Natural Resources West Virginia UniversityPO Box 6215MorgantownWV 26506-6125USA The Experimental Center of Tropical Forestry Chinese Academy of ForestryGuangxi Youyiguan Forest Ecosystem Research StationPingxiangGuangxi 532600China

Aims Slash removal is a common practice to prepare recently harvested sites for ***,little is known about its impact on soil carbon(C)dynamics in subtropical *** study evaluates the effects of burning versus manual slash removal site preparation treatments on soil organic carbon(SOC),soil respiration and soil microbial community structure in a Pinus massoniana plantation in southern *** Three areas within a mature *** plantation were *** months following harvesting,slash on one-half of each area was burned(BURN),whereas slash was manually removed(MANR)on the other *** removal treatments were also compared with adjacent uncut plantation areas(UNCUT).Soil samples,and soil respiration measurements were used to characterize soil properties and microbial communities following slash removal *** Findings Mean soil respiration rates from the MANR and BURN treatments were 26%and 17%lower,respectively,than the UNCUT treatment over 1 *** MANR and BURN treatment resulted in soils with 27%and 9%reduction in total phospholipid fatty acids(PLFAs)and 18%and 10%reduction in bacterial PLFAs,respectively,compared with the UNCUT ***,no significant differences existed between slash removal treatments with respect to soil chemical properties,SOC chemical compositions,soil respiration and microbial communities;although PLFA patterns were notably different for the burned *** factors affecting C dynamics and microbial communities were not sensitive to the differences imparted to the ecosystem due to manual slash removal or *** results suggested that low-intensity burning after clear-cutting might have no significant effect on soil C pool and its dynamics compared with manual slash removal in subtropical plantations.

关键词： plantation management soil organic carbon chemical composition soil respiration soil microbial community fire

Estimating abundance and density of Amur tigers along the Sino- Russian border

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Integrative Zoology 2016年第4期11卷 322-332页

作者： Wenhong XIAO Limin FENG pu mou Dale GMIQUELLE Mark HEBBLEWHITE Joshua FGOLDBERG Hugh SROBINSON Xiaodan ZHAO Bo ZHOU Tianming WANG Jianping GE State Key Laboratory of Earth Surface Processes and Resource Ecology Ministry of Education Key Laboratory for Biodiversity Science and Engineeringand College of Life SciencesBeijing Normal UniversityBeijingChina Wildlife Biology Program Department of Ecosystem and Conservation SciencesCollege of Forestry and ConservationUniversity of MontanaMissoulaMontanaUSA Wildlife Conservation Society BronxNew YorkUSA Department of Ecology Far Eastern Federal UniversityAyaksRusski IslandVladivostokRussia Evolution Ecology and Organismal Biology ProgramDepartment of BiologyUniversity of CaliforniaRiversideCaliforniaUSA Panthera New YorkNYUSA

As an apex predator the Amur tiger(Panthera tigris altaica)could play a pivotal role in maintaining the integrity of forest ecosystems in Northeast *** to habitat loss and harvest over the past century,tigers rapidly declined in China and are now restricted to the Russian Far East and bordering habitat in nearby *** facilitate restoration of the tiger in its historical range,reliable estimates of population size are essential to assess effectiveness of conservation *** we used camera trap data collected in Hunchun National Nature Reserve from April to June 2013 and 2014 to estimate tiger density and abundance using both maximum likelihood and Bayesian spatially explicit capture-recapture(SECR)methods.A minimum of 8 individuals were detected in both sample periods and the documentation of marking behavior and reproduction suggests the presence of a resident *** Bayesian SECR modeling within the 11400 km2 state space,density estimates were 0.33 and 0.40 individuals/100 km^(2) in 2013 and 2014,respectively,corresponding to an estimated abundance of 38 and 45 animals for this transboundary Sino-Russian *** a maximum likelihood framework,we estimated densities of 0.30 and 0.24 individuals/100 km^(2) corresponding to abundances of 34 and 27,in 2013 and 2014,*** density estimates are comparable to other published estimates for resident Amur tiger populations in the Russian Far *** study reveals promising signs of tiger recovery in Northeast China,and demonstrates the importance of connectivity between the Russian and Chinese populations for recovering tigers in Northeast China.

关键词： Amur tiger camera traps density individual identification spatial capture-recapture

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翠菊根系养分捕获形态塑性及其生理机制

植物生态学报 2012年第11期36卷 1172-1183页

作者：董佳牟溥北京师范大学生命科学学院生物多样性与生态工程教育部重点实验室北京100875

为验证以下3个假设:1)NO3–和NH4+及其不同供给方式显著影响根系生长;2)NO3–和NH4+以及不同供给方式对根内激素含量影响显著;3)根构型(1级根长、单位2级根上1级侧根密度(分枝强度)和1级根在2级根上的根间距)与根内激素(生长素(IAA)、... 详细信息

为验证以下3个假设:1)NO3–和NH4+及其不同供给方式显著影响根系生长;2)NO3–和NH4+以及不同供给方式对根内激素含量影响显著;3)根构型(1级根长、单位2级根上1级侧根密度(分枝强度)和1级根在2级根上的根间距)与根内激素(生长素(IAA)、脱落酸(ABA)和细胞分裂素(玉米素核苷+玉米素)(CK(ZR+Z))含量显著相关,采用营养液培养方法,使实验植物翠菊(Callistephus chinensis)在两种氮肥(NO3–和NH4+)、不同施氮浓度(NO3–:0.2、1.0和18.0mmol·L–1;NH4+:0.2、4.0和20.0mmol·L–1),以及脉冲和稳定两种施用方式处理下生长。在处理35天后收获植物,测定根系生物量、根系构型指标(根系1级根长、单位2级根上1级侧根数和1级根在2级根上的根间距)和根系中激素含量(IAA、ABA和CK(ZR+Z))。结果显示:1)实验处理对根生物量和根系中IAA、ABA和CK(ZR+Z)含量均有不同程度的显著影响:施用NH4+使根生物量和根内IAA含量显著低于施用NO3–;高浓度NO3–和NH4+处理亦使根生物量和IAA降低;相对于稳定处理,脉冲施氮显著降低根生物量和根内IAA含量;NO3–使根内CK(ZR+Z)含量显著高于施用NH4+,且与施氮浓度及施氮方式无关;NO3–处理下,高浓度使根内ABA含量提高,且脉冲处理使ABA含量升高。NH4+处理下,高浓度使根内ABA含量降低,而施氮方式对其没有显著影响。2)根构型因素与根内激素关系各异:各激素与1级根间距无显著关系;IAA和CK(ZR+Z)与1级根长和侧根密度有显著回归关系。3)根构型因素与根生物量的关系是根生物量与1级根长和侧根密度有显著正回归关系,与1级根间距无显著回归关系。实验结果表明翠菊根生长的"反常"可能是由于其对脉冲高浓度NH4+耐受阈值低所致。该研究通过实验建立了氮养分种类/供应方式通过改变激素、影响根构型而影响根生长的联系,进一步探究了植物根养分捕获塑性机制。

关键词：翠菊施氮处理根构型根生物量根激素

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植物养分捕获的菌根塑性——外生菌根的塑性

植物生态学报 2010年第12期34卷 1472-1484页

作者：刘延滨牟溥北京师范大学生命科学学院北京100875 黑龙江省林业科学院林业科学研究所哈尔滨150081 地表过程与资源生态国家重点实验室北京100875

植物根资源捕获塑性是地下生态学研究的重点之一,在过去二三十年间有长足的进步。菌根塑性是根资源捕获塑性的重要方面,但由于研究手段的限制,目前仅有概念上的探讨。缺乏菌根塑性的根塑性研究至少是不全面的。菌根生物学的迅速发展,尤... 详细信息

植物根资源捕获塑性是地下生态学研究的重点之一,在过去二三十年间有长足的进步。菌根塑性是根资源捕获塑性的重要方面,但由于研究手段的限制,目前仅有概念上的探讨。缺乏菌根塑性的根塑性研究至少是不全面的。菌根生物学的迅速发展,尤其是分子生物学手段的介入,使对菌根塑性进行深入研究成为可能。该文对外生菌根塑性进行讨论,在简要介绍了外生菌根的生物学基本知识后,着重讨论了外生菌根形态塑性和生理塑性的定义与内涵。通过文献综述,分析讨论了外生菌根塑性的研究现状:很少有研究聚焦在菌根塑性本身,现有的材料多为其他研究的隐示或研究结果的引申,并多在形态塑性方面。外生菌根的生理塑性未见有直接的实验数据。该文还对外生菌根研究中发展的、可用于菌根塑性研究的方法进行了综述。由于外生菌根塑性的复杂性,对菌根塑性的研究会较植物根本身塑性的研究复杂得多,问题也会相对复杂,比如植物和外生菌根菌之间的营养需求关系、植物外生菌根塑性的生态意义、实验方法的缺陷等等。对今后外生菌根塑性研究的方向进行了探讨。

关键词：外生菌根塑性形态塑性菌根塑性生理塑性植物养分捕获

小兴安岭地区大型偶蹄类植物性可食资源质量的研究

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北京师范大学学报（自然科学版） 2014年第1期50卷 44-51页

作者：李云斌牟溥李硕北京师范大学生命科学学院北京100875

从食物链的角度来评价小兴安岭地区东北虎(Panthera tigris altaica)猎物的不同类别植物性可食资源品质的季节变化与所在生态系统的影响.6类植物性可食资源(灌木叶、灌木茎、蕨类、苔草、其他草本和根)样品分春、夏、秋3季分别采自随机... 详细信息

从食物链的角度来评价小兴安岭地区东北虎(Panthera tigris altaica)猎物的不同类别植物性可食资源品质的季节变化与所在生态系统的影响.6类植物性可食资源(灌木叶、灌木茎、蕨类、苔草、其他草本和根)样品分春、夏、秋3季分别采自随机分布于5种森林类型的样方.比较不同林型、季节及不同类别植物性可食资源的粗蛋白、粗纤维含量,得到这些植物性可食资源品质在不同森林生态系统中的分布和季节变化特点.研究发现:1)植物性可食资源的粗蛋白含量在不同森林类型、不同季节以及食物类别之间有显著差异,其中灌木叶、蕨类是粗蛋白含量最高植物性可食资源,且春季植物性可食资源粗蛋白平均含量最高,3个红松阔叶林型的可食资源粗蛋白平均含量最高;2)植物性可食资源的粗纤维含量仅在不同可食资源类别间差异显著,而季节与森林类型间差异不显著.在6类可食性资源中,灌木茎的粗纤维含量最高;灌木叶、蕨类粗纤维含量低且粗蛋白含量高而品质最高.

关键词：东北虎猎物大型草食动物食物品质粗纤维粗蛋白温带针阔混交林