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Estimating and mapping forest biomass in northeast China using joint forest resources inventory and remote sensing data

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Journal of Forestry Research 2018年第3期29卷 789-803页

作者： Xinchuang Wang Shidong Wang limin dai Henan Polytechnic University Jiaozuo 454000People’s Republic of China State Key Laboratory of Forest and Soil Ecology Institute of Applied EcologyChinese Academy of SciencesShenyang 110164People’s Republic of China

Being able to accurately estimate and map forest biomass at large scales is important for a better understanding of the terrestrial carbon cycle and for improving the effectiveness of forest management. In this study, forest plot sample data, forest resources inventory(FRI) data, and SPOT Vegetation(SPOT-VGT) normalized difference vegetation index(NDVI) data were used to estimate total forest biomass and spatial distribution of forest biomass in northeast China(with 1 km resolution). Total forest biomass at both county and provincial scales was estimated using FRI data of 11 different forest types obtained by sampling 1156 forest plots, and newly-created volume to biomass conversion models. The biomass density at the county scale and SPOT-VGT NDVI data were used to estimate the spatial distribution of forest biomass. The results suggest that the total forest biomass was 2.4 Pg(1 Pg = 10g), with an average of 77.2 Mg ha, during the study period. Forests having greater biomass density were located in the middle mountain ranges in the study area. Human activities affected forest biomass at different elevations, slopes and aspects. The results suggest that the volume to biomass conversion models that could be developed using more plot samples and more detailed forest type classifications would be better suited for the study area and would provide more accurate biomass estimates. Use of both FRI and remote sensing data allowed the down-scaling of regional forest biomass statistics to forest cover pixels to produce a relatively fineresolution biomass map.

关键词： Forest biomass Biomass density Spatial distribution Human disturbance Remote sensing

Effects of management regimes on carbon sequestration under the Natural Forest Protection Program in northeast China

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Journal of Forestry Research 2018年第5期29卷 1187-1194页

作者： Linhai Jiang Wei Zhao Bernard J.Lewis Yawei Wei limin dai State Key Laboratory of Forest and Soil Ecology Institute of Applied Ecology Chinese Academy of SciencesShenyang 110164 People's Republic of China University of Chinese Academy of Sciences Beijing 100101People's Republic of China Department and Research Center of the State Post Bereau Beijing 100000 People's Republic of China Dalian Institute of Software and Service Outsourcing Dalian 106000 People's Republic of China Shenyang Agricultural University Shenyang 110000People's Republic of China

Carbon sinks constitute an important element within the complex phenomenon of global climate change,and forest ecosystems are important global carbon *** Natural Forest Protection Program（NFPP） is an ecological program in China that was established after catastrophic flooding in the country in *** goals of the NFPP are to curb the deterioration of the ecological environment,strengthen the protection and restoration of habitat to increase biodiversity,and rehabilitate natural forests to support sustainable development in forest *** study looked at changes in carbon sequestration in a forested area of northeast China after the inception of the *** program divides China＇s natural forests into three classes—commercial and two types of noneconomic forests—that are subject to management regimes prescribing varying levels of timber harvest,afforestation,and *** the 18-year period from 1998 to 2015,the total amount of carbon sequestration increased at an average annual rate of 0.04 MT *** trend reflects a transformation of forest management practices after implementation of the NFPP that resulted in prohibited and/or restricted logging and tighter regulation of allowable harvest levels for specific *** documenting this trend,guidelines for more effective implementation of forestry programs such as the NFPP in other countries in the future are also suggested.

关键词： Natural Forest Protection Program(NFPP) Carbon sequestration San Chazi Forestry Bureau China forestry

大别山南坡森林植物群落物种多样性及其与海拔因子的关系

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生态学报 2024年第12期44卷 5307-5317页

作者：童跃伟屈利利符庆响陈雨蓓项小燕朱卫东齐光代力民安庆师范大学生命科学学院安庆246133 皖西南生物多样性研究与生态保护安徽省重点实验室安庆246133 岳西古井园自然保护区管理中心安庆246670 平顶山学院平顶山467000 中国科学院沈阳应用生态研究所沈阳110016

大别山地区植物资源丰富,区系组成复杂且起源古老,为连接华东、华北和华中三大植物区系的纽带,也是我国重要的生物多样性保护和水源涵养生态功能区。采用样方法,在大别山南坡的多枝尖、庵基坪和麒麟沟3个地区,沿着不同海拔高度选取了具... 详细信息

大别山地区植物资源丰富,区系组成复杂且起源古老,为连接华东、华北和华中三大植物区系的纽带,也是我国重要的生物多样性保护和水源涵养生态功能区。采用样方法,在大别山南坡的多枝尖、庵基坪和麒麟沟3个地区,沿着不同海拔高度选取了具有代表性的森林植物群落进行研究,从不同植物群落类型和层次的物种多样性、均匀度和丰富度及其与海拔因子的关系等方面,对大别山南坡的森林植物群落物种多样性进行综合分析。结果表明:1.共记录有植物108科270属449种,划分为20个森林植物群落类型;2.森林植物群落各层次物种丰富度表现为草本>乔木>灌木;Shannon-Wiener多样性指数和Simpson多样性指数呈现出乔木>灌木>草本;Pielou均匀度指数变化较为复杂;3.森林植物群落各层次的物种丰富度随海拔升高而下降;Shannon-Wiener指数和Simpson指数也表现为随着海拔升高而下降,但草本层在1400m之后有上升的趋势。Pielou指数在乔木层中表现为随着海拔的升高而下降,在草本层中表现为先下降后出现上升,在灌木层中则随着海拔的升高而上升,但其波动更为剧烈。本研究对大别山南坡森林植被大范围的采样观测研究,能够全面的展现大别山南坡森林植物的种类分布、空间组成等整体概况及其与海拔因子的关系,能为以后大别山南坡生物多样性的保护提供较为全面真实的数据,从而为大别山地区生物多样性的保护和可持续利用提供理论依据和实践意义。

关键词：大别山森林植物群落物种丰富度物种多样性指数海拔

维普期刊数据库博看期刊

糖尿病周围神经病变疲劳轨迹的潜在类别及影响因素研究

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现代临床护理 2024年第5期23卷 24-32页

作者：蔡冬青戴莉敏丁慧敏杨群江苏大学附属人民医院江苏镇江212002

目的探讨糖尿病周围神经病变(diabetic peripheral neuropathy,DPN)患者疲劳轨迹的潜在类别,并分析其影响因素。方法采用便利抽样法,选取2021年6月—2022年6月于江苏省某三级甲等综合医院内分泌科住院的426例糖尿病周围神经病变患者... 详细信息

目的探讨糖尿病周围神经病变(diabetic peripheral neuropathy,DPN)患者疲劳轨迹的潜在类别,并分析其影响因素。方法采用便利抽样法,选取2021年6月—2022年6月于江苏省某三级甲等综合医院内分泌科住院的426例糖尿病周围神经病变患者作为调查对象。在患者出院时(T1)收集患者的一般资料及疾病相关资料,并采用中文版多维度疲劳量表、匹兹堡睡眠质量指数量表、社会支持评定量表、疼痛数字评分表和恐动症Tampa评分表对患者进行调查,在患者出院3个月(T2)、6个月(T3)、12个月(T4)继续采用中文版多维度疲劳量表评估患者的疲劳程度。使用增长混合模型识别其疲劳轨迹的潜在类别,并采用Logstic回归分析患者疲劳的影响因素。结果 414例患者完成研究。识别出糖尿病周围神经病变患者疲劳轨迹被分为3种:显著升高组(19.6%)、缓慢升高组(47.8%)、疲劳下降组(32.6%)。Logistic回归分析显示,年龄、睡眠、社会支持、共病个数、体质量指数(body mass index,BMI)、疼痛和运动恐惧是糖尿病周围神经病变患者疲劳轨迹潜在类别的影响因素。结论糖尿病周围神经病变患者疲劳轨迹存在3种潜在类别,年龄、睡眠障碍、社会支持、共病个数、BMI、疼痛评分、运动恐惧是患者疲劳潜类别的影响因素。

关键词：糖尿病周围神经病变疲劳轨迹潜在类别

Land Use Effects on Soil Organic Carbon, Microbial Biomass and Microbial Activity in Changbai Mountains of Northeast China

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Chinese Geographical Science 2014年第3期24卷 297-306页

作者： FANG Xiangmin WANG Qingli ZHOU Wangming ZHAO Wei WEI Yawei NIU Lijun dai limin State Key Laboratory of Forest and Soil Ecology Institute of Applied EcologyChinese Academy of Sciences University of Chinese Academy of Sciences Changbai Mountains Academy of Sciences

Land use changes are known to alter soil organic carbon （SOC） and microbial properties, however, information about how conversion of natural forest to agricultural land use as well as plantations affects SOC and microbial properties in the Changbai Moun- tains of Northeast China is meager. Soil carbon content, microbial biomass carbon （MBC）, basal respiration and soil carbon mineraliza- tion were studied in five selected types of land use： natural old-growth broad-leaved Korean pine mixed forest （NF）; spruce plantation （SP） established following clear-cutting of NF; cropland （CL）; ginseng farmland （GF） previously under NF; and a five-year Mongolian oak young forest （YF） reforested on an abandoned GF, in the Changbai Mountains of Northeast China in 2011. Results showed that SOC content was significantly lower in SP, CL, GF, and YF than in NF. MBC ranged from 304.4 mg/kg in CL to 1350.3 mg/kg in NF, which was significantly higher in the soil of NF than any soil of the other four land use types. The SOC and MBC contents were higher in SP soil than in CL, GF, and YF soils, yielding a significant difference between SP and CL. The value of basal respiration was also higher in NF than in SP, CL, GF, and YF. Simultaneously, higher values of the metabolic quotient were detected in CL, GF, and YF soils, indicat- ing low substrate utilization of the soil microbial community compared with that in NF and SP soil. The values of cumulative mineral- ized carbon and potentially mineralized carbon （Co） in NF were significantly higher than those in CL and GF, while no significant dif- ference was observed between NF and SP. In addition, YF had higher values of Co and C mineralization rate compared with GF. The results indicate that conversion from NF into agricultural land （CL and GF） uses and plantation may lead to a reduction in soil nutrients （SOC and MBC） and substrate utilization efficiency of the microbial community. By contrast, soils below SP were more conducive to the preserv

关键词： land use soil organic carbon (SOC) microbial biomass carbon (MBC) carbon mineralization basal respiration ChangbaiMountains

Biomass Carbon Storage and Its Sequestration Potential of Afforestation under Natural Forest Protection Program in China

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Chinese Geographical Science 2014年第4期24卷 406-413页

作者： ZHOU Wangming Bernard Joseph LEWIS WU Shengnan YU Dapao ZHOU Li WEI Yawei dai limin State Key Laboratory of Forest and Soil Ecology Institute of Applied Ecology Chinese Academy of Sciences University of Chinese Academy of Sciences Shenyang Agriculture University

Based on the data from China′s Seventh Forest Inventory for the period of 2004–2008, area and stand volume of different types and age-classes of plantation were used to establish the relationship between biomass density and age of planted forests in different regions of the country. Combined with the plantation area in the first-stage of the Natural Forest Protection(NFP) program(1998–2010), this study calculated the biomass carbon storage of the afforestation in the first-stage of the program. On this basis, the carbon sequestration potential of these forests was estimated for the second stage of the program(2011–2020). Biomass carbon storage of plantation established in the first stage of the program was 33.67 Tg C, which was majority accounted by protection forests(30.26 Tg C). There was a significant difference among carbon storage in different regions, which depended on the relationship of biomass carbon density, forest age and plantation area. Under the natural growth, the carbon storage was forecasted to increase annually from 2011 to 2020, reaching 96.03 Tg C at the end of the second-stage of the program in 2020. The annual growth of the carbon storage was forecasted to be 6.24 Tg C/yr, which suggested that NFP program has a significant potential for enhancing carbon sequestration in plantation forests under its domain.

关键词： Natural Forest Protection (NFP) program afforestation carbon storage carbon sequestration China

A statistical analysis of spatiotemporal variations and determinant factors of forest carbon storage under China's Natural Forest Protection Program

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Journal of Forestry Research 2018年第2期29卷 410-419页

作者： Shengnan Wu Jiaqi Li Wangming Zhou Bernard Joseph Lewis Dapao Yu Li Zhou Linhai Jiang limin dai Institute of Applied Ecology Chinese Academy of SciencesShenyang 110016People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China School of Environmental Science and Technology Dalian University of TechnologyDalian 116024People’s Republic of China

The Natural Forest Protection Program(NFPP)is one of the key ecological forestry programs in *** not only facilitates the improvement of forest ecological quality in NFPP areas,but also plays a significant role in increasing the carbon storage of forest *** program covers 17 provinces,autonomous regions,and municipalities with correspondingly diverse forest resources and environments,ecological features,engineering measures and forest management regimes,all of which affect regional carbon *** this study,volume of timber harvest,tending area,pest-infested forest,firedamaged forest,reforestation,and average annual precipitation,and temperature were evaluated as factors that influence carbon *** developed a vector autoregression model for these seven indicators and we studied the dominant factors of carbon storage in the areas covered by *** harvest was the dominant factorinfluencing carbon storage in the Yellow and Yangtze River *** contributed most to carbon storage in the state-owned forest region in *** state-owned forest regions of Heilongjiang and Jilin Provinces,the dominant factors were forest fires and forest cultivation,*** the enhancement of carbon sequestration capacity,a longer rotation period and a smaller timber harvest are recommended for the Yellow and Yangtze River *** should be planted in stateowned forests in *** fires should be prevented in state-owned forests in Heilongjiang,and greater forest tending efforts should be made in the state-owned forests in Jilin.

关键词： Forest carbon storage Influencing factors Natural forest protection program Variance decomposition Vector autoregression(VAR) model

Spatiotemporal evidence of tree-growth resilience to climate variations for Yezo spruce(Picea jezoensis var. komarovii) on Changbai Mountain, Northeast China

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Journal of Forestry Research 2020年第3期31卷 927-936页

作者： Xuerui Gai Shoule Wang Li Zhou Jian Wu Wangming Zhou Jianhua Bi Linlin Cao limin dai Dapao Yu Key Laboratory of Forest Ecology and Management Institute of Applied EcologyChinese Academy of SciencesShenyang 110016People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi 830011People’s Republic of China Shenyang University Shenyang 110044People’s Republic of China

Global warming-induced changes in tree-growth resilience to climate variations have been widely reported for mid-and high-latitude regions around the world. Most studies have focused on the spatial variability of trees in radial growth-climate relationships on Changbai Mountain in Northeast China, but little is known about temporal changes in tree growth in response to climate. We explored the stability of effect of climate variables on radial growth of Yezo spruce [Picea jezoensis Carr. var. komarovii(***.) Cheng et ***] at 1200, 1400, and 1600 m above sea level, representing low, middle, and upper ranges of the spruce-fir mixed forest on Changbai Mountain. The results showed that the relation between tree growth and climate did not vary with altitude, but the stability of the tree-growth-climate relationship did vary with altitude as the climate changed. Radial growth of Yezo spruce at allthree elevations was influenced primarily by maximum temperature during May(Tmax5) and mean minimum temperature from January to March(Tmin1-3). More specifically, the relationship strengthened significantly at lower elevations, but weakened significantly at higher elevation, and fluctuated at mid elevations since *** in Tmin1-3 and decrease in Tmax5 were the main reasons for the decrease in the radial growth at three altitudes. The findings of this study clarified that the decrease in radial growth on Changbai Mountain is not a “divergence problem” of an unexpected decrease in tree growth in response to an increase in mean temperature and provides a reference for using tree-ring data to reconstruct climate patterns and/or predict the growth of trees under various climate change scenarios.

关键词： Altitudinal gradient Changbai Mountain Ring width Spatiotemporal stability Yezo spruce

The influence of land use change on the spatial–temporal variability of habitat quality between 1990 and 2010 in Northeast China

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Journal of Forestry Research 2019年第6期30卷 2227-2236页

作者： limin dai Shanlin Li Bernard J.Lewis Jian Wu Dapao Yu Wangming Zhou Li Zhou Shengnan Wu Key Laboratory of Forest Ecology and Management Institute of Applied EcologyChinese Academy of SciencesShenyang 110016People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China

Land use changes are a direct consequence of interactions between humans and *** the spatial and temporal changes in habitat quality brought about by land use change can provide a scientific basis for ecological protection and land *** on the analysis of land use change from 1990 to 2010 in Northeast China,we used the InVEST(integrated valuation of ecosystem services and trade-offs)module to evaluate habitat quality based on watershed *** results show that:(1)the main land use changes from 1990 to 2010 were the transition from grasslands and forest lands to agricultural lands,which led to a decrease in connectivity of landscape and an increase in fragmentation;(2)areas of high habitat quality were distributed north of the Greater Khingan Mountains,the region of the Lesser Khingan Mountains and east of the Changbai Mountains,while the central plain had low habitat quality;(3)agricultural lands had the largest effect on habitat degradation among all habitat *** these 2 decades,the contribution of agricultural lands to habitat degradation were 43.4%in 1990,44.6%in 2000 and 43.9%in 2010;and,(4)at a landscape scale,patch density and splitting index present noticeable negative correlations with habitat quality *** quality was significantly affected by landscape fragmentation and decreased connectivity.

关键词： InVEST model Habitat quality Land use change Landscape pattern