Results 31 to 40 of about 600 (110)
Carbon Sequestration and Blance in Casuarina equisetifolia Plantation Ecosystem on Coastal Sand [PDF]
, 2008 随着大气温室气体含量上升，全球气候变暖，森林作为固定二氧化碳的绿色植物主体，其CO2吸收和储存功能越来越受到人们的关注。森林现有植物中碳储量和森林生态系统中碳循环是评价森林CO2吸收功能的主要尺度。随着近年来天然林资源的减少，人工林面积不断增加，人工林在森林生态系统中占有越来越重要的地位，中国现有人工林保存面积已达到5300多万公顷，但目前有关人工林生态系统碳吸存与碳平衡的研究不多，特别是我国南亚热带地区人工林生态系统碳循环研究，这就限制了对我国南亚热带人工林生态系统碳汇源的准确评估。 有鉴如此 ...
叶功富
core
World Medical &Health Policy, Volume 17, Issue 4, Page 823-830, December 2025.ABSTRACT Sepsis is a leading cause of mortality in the United States, with over 350,000 deaths annually, yet the contribution of neighborhood‐level social determinants of health (SDoH) remains underexplored. We conducted a retrospective analysis of 4.4 million hospitalized patients with sepsis, identified using ICD‐10 codes, leveraging de‐identified ...
Ahad Khaleghi Ardabili +3 more
wiley +1 more source
Shuitu Baochi Xuebao, 2003 采用机会成本法、市场价格替代法等手段对重庆四面山地区典型亚热带常绿阔叶林生态系统 的涵养水源、保持土壤、净化空气、固定CO2、休闲游憩等生态系统功能进行了初步估 算.最后得出该地区森林生态系统的涵养水源价值为1.035亿元、保持土壤价值为0.279 7亿元、固定CO2价值为0.837 9亿元、净化空气价值为0.687 0亿元、休闲游憩价值为1.90 0 4亿元.该地区森林生态系统服务功能的总价值为4.74亿元 .
饶良懿, 朱金兆
doaj
, 2003 本文为武夷山自然保护区生物多样性GEF项目内容之一,调查了保护区内不同海拔高度的代表性森林生态系统的物种多样性。亮叶水青冈林是山地的代表性森林生态系统之一。应用Shannon—Wiener多样性指数、Pielou均匀度、Simpson指数和PIE对武夷山亮叶水青冈群落高等植物进行了物种多样性研究。结果表明该群落的Shannon—Wiener指数值为1.2973,Pielou均匀度为34.71％,Simpson指数为2.4777,PIE为0.5964,群落的乔木层物种多样性较高,各项多样性指数分别为2 ...
何建源 +8 more
core
Finding floral and faunal species richness optima among active fire regimes
Conservation Biology, Volume 39, Issue 6, December 2025.Abstract Changing fire regimes have important implications for biodiversity and challenge traditional conservation approaches that rely on historical conditions as proxies for ecological integrity. This historical‐centric approach becomes increasingly tenuous under climate change, necessitating direct tests of environmental impacts on biodiversity.
Zachary L. Steel +8 more
wiley +1 more source
Ecological Compensation Evaluation of Yongding South Industrial Park in Fujian Province [PDF]
, 2013 运用生态系统服务功能价值法以及生态恢复成本法对福建省永定工业园南部园区开发的生态补偿费用进行了估算,以生态系统服务功能价值损失为上限、生态恢复成本为下限,经发展阶段系数、林地补偿系数、贴现率调整,得到生态补偿费用的下限为4 987.50万元/A,上限为56 760.25万元/A,指出通过利益相关者的协商博弈确定最终的生态补偿标准。Ecosystem services value assessment method and ecological restoration cost assessment ...
刘花台, 汪新, 王燕云
core
Conservation Biology, Volume 39, Issue 6, December 2025.Abstract Identifying refugia from emerging threats is vital to ensure the persistence of rare and threatened species, but modeling habitat distribution for these species is challenging and the role of people in refuge management is rarely considered. Myrtle rust is an emerging infectious disease that represents a grave threat to the rare wetland tree ...
Sarah M. Herbert +7 more
wiley +1 more source
A Review on Litter Decomposition in Forest Ecosystem [PDF]
, 2006 杨玉盛为通讯作者。[中文文摘]系统评述森林凋落物的分解过程、凋落物分解及养分释放的影响因素、分解研究的方法等。森林凋落物的分解既有物理过程,又有生物化学过程,一般由淋溶、自然粉碎、代谢作用等共同完成。凋落物分解过程先后出现分解速率较快和较慢2个阶段,元素迁移一般呈现淋溶-富集-释放的模式。凋落物分解主要受气候、凋落物性质、微生物和土壤动物的影响,气候是最基本的影响因素,常用实际蒸散(actualevapotranspiration简称AET)作为指标。凋落物分解速率呈明显的气候地带性,与温度 ...
杨玉盛(福建师范大学地理科学学院) +4 more
core +4 more sources
, 2008 以不同发育阶段木麻黄人工林为研究对象,测定了凋落物各组分含量的月动态和季节动态。结果表明:幼龄林、中龄林、成熟林向林地输入的凋落物量分别为4.84t·hm-2、9.25t·hm-2和13.33t·hm-2。不同发育阶段各组分所占比例及凋落量变化较大,成熟林分别是中龄林和幼龄林的1.44倍和2.75倍。凋落物的碳素含量季节变化为:冬季>秋季>夏季>春季。国家“十一五”科技支撑计划项目(2006BAD03A14-01);; 福建省重大科技专项(2006NZ0001 ...
卢昌义 +4 more
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Biodiversity characteristics of large forest plots in Qinghai area of Qilian Mountain National Park [PDF]
[Objective] Long-term monitoring of plant community dynamics in large forest plots helps reveal the spatial patterns and underlying mechanisms that sustain species diversity.
DU Yangong +3 more
core +1 more source