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Effects of root dominate over aboveground litter on soil microbial biomass in global forest ecosystems

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forest ecosystems 2021年第3期8卷 504-512页

作者： Yanli Jing Peng Tian Qingkui Wang Weibin Li Zhaolin Sun Hong Yang Huitong Experimental Station of forest Ecology CAS Key Laboratory of Forest Ecology and ManagementInstitute of Applied EcologyChinese Academy of SciencesShenyang 110016China School of forestry&Landscape Architecture Anhui Agricultural UniversityHefei 230036China State Key Laboratory of Grassland Agro-ecosystems/Key Laboratory of Grassland Livestock Industry Innovation Ministry of Agriculture/College of Pastoral Agriculture Science and TechnologyLanzhou UniversityLanzhou 730020China Institute of Applied Ecology Chinese Academy of SciencesShenyang 110016China

Background:Inputs of above-and belowground litter into forest soils are changing at an unprecedented rate due to continuing human disturbances and climate *** drive the soil carbon(C)cycle,but the roles of above-and belowground litter in regulating the soil microbial community have not been evaluated at a global ***:Here,we conducted a meta-analysis based on 68 aboveground litter removal and root exclusion studies across forest ecosystems to quantify the roles of above-and belowground litter on soil microbial community and compare their relative ***:Aboveground litter removal significantly declined soil microbial biomass by 4.9%but root exclusion inhibited it stronger,up to 11.7%.Moreover,the aboveground litter removal significantly raised fungi by 10.1%without altering bacteria,leading to a 46.7%increase in the fungi-to-bacteria(F/B)***,root exclusion significantly decreased the fungi by 26.2%but increased the bacteria by 5.7%,causing a 13.3%decrease in the F/B ***,root exclusion significantly inhibited arbuscular mycorrhizal fungi,ectomycorrhizal fungi,and actinomycetes by 22.9%,43.8%,and 7.9%,*** negative effects of aboveground litter removal on microbial biomass increased with mean annual temperature and precipitation,whereas that of root exclusion on microbial biomass did not change with climatic factors but amplified with treatment *** importantly,greater effects of root exclusion on microbial biomass than aboveground litter removal were consistent across diverse forest biomes(expect boreal forests)and ***:These data provide a global evidence that root litter inputs exert a larger control on microbial biomass than aboveground litter inputs in forest *** study also highlights that changes in above-and belowground litter inputs could alter soil C stability differently by shifting the microbial community structure in the opposite direction.T

关键词： forest ecosystems soil microorganisms Fungi Litter Root Carbon input Meta-analysis

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A survey of remote sensing-based aboveground biomass estimation methods in forest ecosystems

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International Journal of Digital Earth 2016年第1期9卷 63-105页

作者： Dengsheng Lu Qi Chen Guangxing Wang Lijuan Liu Guiying Li Emilio Moran Zhejiang Provincial Key Laboratory of Carbon Cycling in forest ecosystems and Carbon Sequestration School of Environmental&Resource SciencesZhejiang A&F UniversityLin’AnChina Center for Global Change and Earth Observations Michigan State UniversityEast LansingMIUSA Department of Geography University of Hawaii at MānoaHonoluluHIUSA Department of Geography and Environmental Resources Southern Illinois University at CarbondaleCarbondaleILUSA

Remote sensing-based methods of aboveground biomass(AGB)estimation in forest ecosystems have gained increased attention,and substantial research has been conducted in the past three *** paper provides a survey of current biomass estimation methods using remote sensing data and discusses four critical issues–collection of field-based biomass reference data,extraction and selection of suitable variables from remote sensing data,identification of proper algorithms to develop biomass estimation models,and uncertainty analysis to refine the estimation ***,we discuss the impacts of scales on biomass estimation performance and describe a general biomass estimation *** optical sensor and radar data have been primary sources for AGB estimation,data saturation is an important factor resulting in estimation *** Detection and Ranging(lidar)can remove data saturation,but limited availability of lidar data prevents its extensive *** literature survey has indicated the limitations of using single-sensor data for biomass estimation and the importance of integrating multi-sensor/scale remote sensing data to produce accurate estimates over large *** research is needed to extract a vertical vegetation structure(*** height)from interferometry synthetic aperture radar(InSAR)or optical stereo images to incorporate it into horizontal structures(*** cover)in biomass estimation modeling.

关键词： aboveground biomass forest ecosystems parametric vs.nonparametric algorithms remote sensing uncertainty

Detecting climate change effects on forest ecosystems in Southwestern Romania using Landsat TM NDVI data

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Journal of Geographical Sciences 2014年第5期24卷 815-832页

作者： Remus PRAVALIE Igor SIRODOEV Daniel PEPTENATU Bucharest University- Faculty of Geography 14-12 Nicolae Balcescu Str. Romania Institute of Ecology and Geography Moldavian Academy of Sciences Republic of Moldova Bucharest University- Interdisciplinary Center for Advanced Research on Territorial Dynamics 3-12 Regina Elisabeta Str. Bucharest Romania

Nowadays, Southwestern Romania faces a large-scale aridization of the climate, revealed by the rise of temperatures and the decline of the amount of precipitations, with negative effects visible, among others, in the desiccation of forest vegetation. The present study means to identify the changes that occurred, quality-wise, in the past two decades （1990-2011） in forest vegetation in Southwestern Romania, and to establish the link between those changes and extant thermal stress in the region, whose particular features are high average annual and seasonal temperatures. In order to capture the evolution in time of cli- mate aridization, a first step consisted in using climate data, the temperature and precipitation parameters from three weather stations; these parameters were analyzed both individually and as aridity indexes （De Martonne and UNEP）. In order to quantify the changes in forest vegetation, NDVI indexes were used and analyzed, starting off from Landsat satellite images, acquired at three distinct moments in time, 1990, 2000 and 2011. In order to identify the link between the changes of NDVI index values and regional thermal stress, a yardstick of climate changes, statistical correlations were established between the peak values of average annual temperatures, represented in space, and negative changes in the NDVI index, as revealed by the change-detection analysis. The results obtained indicated there is an obvious （statistically significant） connection between thermal stress and the desiccation （degradation） of forest species in the analyzed area, with false acacia （Robinia Pseudoacacia） the main species to be impacted.

关键词： thermal stress forest ecosystems NDVI index change detection analysis

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forest ecosystems 2016年第4期 329-329页

a SpringerOpen Journal *** and Scope forest ecosystems is an international Open Access journal publishing scientific communications from any discipline that can provide interesting contributions about the structure and dynamics of"natural"and"domesticated"forest ecosystems,and their services to *** welcome innovative science as well as application

关键词： forest ecosystems

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forest ecosystems 2015年第4期2卷 F0003-F0003页

Aims and Scopeforest ecosystems is an international Open Access journal publishing scientific communications from any discipline that can provide interesting contributions about the structure and dynamics of ＂natural＂ and ＂domesticated＂ forest ecosystems, and their services to people. We welcome innovative science as well as application oriented work that will enhance understanding of woody plant communities. Very specific studies are welcome if they are part of a thematic series that provides some holistic perspective that is of general interest.

关键词： forest ecosystems

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forest ecosystems 2019年第2期 178-178页

关键词： forest ecosystems

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forest ecosystems 2015年第2期 168-168页

关键词： forest ecosystems

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forest ecosystems 2017年第3期 251-251页

a SpringerOpen Journal *** and Scope forest ecosystems is an international Open Access journal publishing scientific communications from any discipline that can provide interesting contributions about the structure and dynamics of "natural" and "domesticated" forest ecosystems,and their services to people.

关键词： forest ecosystems

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forest ecosystems 2019年第3期 261-261页

a SpringOpen Journal *** Aims and Scope forest ecosystems is an international Open Access journal publishing scientific communications from any discipline that can provide interesting contributions about the structure and dynamics of "natural" and "domesticated" forest ecosystems, and their services to *** welcome innovative science as well as application oriented work that will enhance understanding of woody

关键词： forest ecosystems