Results 31 to 40 of about 1,242,388 (165)
Functional Ecology, Volume 39, Issue 6, Page 1550-1566, June 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract Forests store substantial amounts of soil organic carbon (SOC), but SOC stocks differ strongly between forest ecosystems dominated by arbuscular mycorrhizal (AM) or ectomycorrhizal (EcM) fungi.
Mengxu Zhang +10 more
wiley +1 more source
Amazonian conservation across archipelagos of Indigenous territories
Conservation Biology, Volume 39, Issue 2, April 2025.Abstract Indigenous stewardship is essential to the conservation of biocultural diversity, yet conventional conservation models often treat Indigenous territories (ITs) as homogeneous or isolated units. We propose that archipelagos of Indigenous territories (AITs), clusters of ITs that span geographies but are connected through shared cultural or ...
Michael S. Esbach +3 more
wiley +1 more source
, 2010 草地生态系统在全球碳循环中扮演重要角色.中国草地约占中国陆地面积的1/3,但对其碳库大小、动态及其与气候变化的关系缺乏系统研究.基于341个样地调查的地上、地下生物量资料和1982~2006年的卫星遥感数据,利用地上生物量与遥感数据之间及地上生物量与地下生物量之间的关系,估算了中国北方草地生物量碳库及其空间分布,分析了过去25年生物量碳密度和碳库的时间动态及其与气候变化的关系.结果显示:(1)中国北方草地生物量碳库为557.5TgC,地上、地下生物量密度分别为39.5和244.6gC/m2 ...
方精云 +3 more
core
Dianci bileiqi, 2019 在中性点经消弧线圈接地方式的配电网发生单相接地故障时,对接地故障的处理、故障电流的控制、故障点的绝缘恢复、故障线路的查找等方面进行了分析,讨论了故障点对人身安全的影响;讨论了由于故障导致接地选线难的因素;讨论了故障发生后残流控制与故障恢复、弧光过电压及中性点位移电压的关系;讨论了配电网与消弧线圈接地方式在发展中存在的矛盾,认为目前该接地方式存在有严重的安全瓶颈、选线瓶颈与容量瓶颈,存在消弧困难和弧光接地过电压的问题,提出了中性点动态接地改造的重要性,并对其原理进行阐述。
张辉
doaj
Conservation Biology, Volume 39, Issue 2, April 2025.Abstract Emerging infectious diseases are increasingly recognized as a significant threat to global biodiversity conservation. Elucidating the relationship between pathogens and the host microbiome could lead to novel approaches for mitigating disease impacts.
Alexander S. Romer +25 more
wiley +1 more source
, 2008 生态信息的合理化表达对生态信息的传播、共享与分析，以及生态信息的发掘有着至关重要的作用。本文围绕生态信息合理化表达等相关问题，在系统分析、消化前人工作的基础上，依据不同的分类标准，对城市生态信息进行归纳分类。在此基础上，针对生态信息的特征，探索了文字、统计图表、地图、影像和虚拟现实等在生态信息表达中的地位和作用。其中，采用了统计图表方式对乌鲁木齐市的各行政区面积、土地利用覆盖变化信息、大气污染信息、水质监测信息等属性信息进行了表达。采用地图可视化表达方式，结合乌鲁木齐市遥感影像 ...
王晓飞
core
Dianci bileiqi, 2018 针对10 kV变电台区设备在临近线路遭受雷击后虽然台区避雷器动作但仍发生台区变压器损坏的现象,本文使用场路结合分析的方法,对不同接地方式下的台区雷电冲击过电压进行分析。利用电磁暂态分析软件ATP-EMTP建立了台区雷电冲击电路分析模型,提取了经台区接地引下线进入接地体的冲击电流波形;使用接地分析软件CDEGS建立了台区接地体的场分析模型,得到了台区接地体在冲击电流作用下不同位置的电位瞬态分布情况。文章通过提取台区变压器高压绕组承受冲击电压的幅值,阐明了台区避雷器保护失效的机理 ...
刘守豹 +3 more
doaj
A social network analysis of an epistemic community studying neoliberal conservation
Conservation Biology, Volume 39, Issue 2, April 2025.Abstract Researchers typically operate in epistemic communities: groups that share common approaches to research agendas and sociopolitical action and define areas of debate. Although productive in their own spheres, a lack of understanding among these communities can undermine scientific progress. Thus, analyzing epistemic communities is important for
Brittany Bunce +5 more
wiley +1 more source
, 2009 在中国科学院海伦农田生态系统国家野外科学观测研究站,应用田间定位试验研究了玉米地、休闲地、苜蓿地和裸地4种不同土地利用方式下农田黑土水分动态变化特征。结果表明:土壤剖面0-190 cm水分含量随深度的增加呈先增加后减小的趋势,不同土地利用方式下农田黑土表层0-30 cm的土壤含水量差异较明显,总体表现为裸地相对较高,其次为休闲地、苜蓿地和玉米地;研究时段内土壤水分的动态变化具有明显的季节性,一般可以划分为水分相对稳定期、水分消耗期和水分补给期3个时期;根据变异系数将土壤水分的垂直变化划分为活跃层 ...
韩晓增 +3 more
core
Uncovering Xi Jinping's Policy Agenda: Text As Data Approach
The Developing Economies, Volume 63, Issue 1, Page 9-46, March 2025.How many agendas has Xi Jinping put forth and promoted since taking office in 2012, and what are the types of agendas? How much of political attention has each agenda received, and how has the allocation of attention changed over time? We utilize a dataset of presidential statements, speeches, and reports from 2012 to 2022 and employed automated text ...
Jaehwan Lim, Asei Ito, Hongyong Zhang
wiley +1 more source