Results 21 to 30 of about 1,173 (154)
Shuitu Baochi Xuebao, 2006 生态系统服务价值的研究是目前生态学研究的热点之一。本文应用Costanza生态系统服务价值计算公式，采用谢高地等人的中国陆地生态系统单位面积生态服务价值表，分析了1988-2004年武汉市土地利用的时空变化，并计算由此导致的生态系统服务价值及其结构的时空变化，结果发现：①1988～2004年，武汉市土地利用变化的热点地区和总ESV变化的热点地区都主要集中在城郊区。②1988-2004年，武汉市总ESV增加了，但生态系统服务价值结构变化较大，生态系统提供某些单项服务的功能相对减弱。③1988-2004年 ...
闵捷, 高魏, 李晓云, 张安录
doaj +2 more sources
Shuitu Baochi Xuebao, 2023 陕西汉江流域是"南水北调"中线工程的主要水源地,属于国家重点生态功能区。研究流域内景观格局的时空变化特征、生态系统服务价值和景观生态风险的相关性,对保持流域内生态系统稳定性、保障流域生态安全具有指导意义。基于2000年、2005年、2010年、2015年、2020年陕西汉江流域5期土地利用数据,采用景观格局指数计算、生态系统服务价值评估、景观生态风险评估等方法,研究景观格局变化下生态系统服务价值、景观生态风险的时空演变机制及空间相关关系。结果表明:(1)2000—2020年 ...
孟晓璐, 张艳芳
doaj
Study on Urban Landscape Ecological Risk Measurement and the Influencing Factors in the Yellow River Delta [PDF]
[Objective] The Yellow River Delta, a typical ecological fragile area, faces prominent landscape ecological risk (LER) due to multiple factors. Systematic understanding of landscape risk is crucial for optimizing landscape patterns and effectively ...
LI Huilin +4 more
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Spatio-temporal Variation of Ecological Service Values in Lijiang River Basin During 2000—2020
Shuitu baochi tongbao, 2022 [Objective] The spatio-temporal variation pattern and change law of ecological service value (ESV) in the Lijiang River basin during 2000—2020 were determined in order to provide a spatial governance method for optimizing land use structure and achieving
Zhang Junmin, Rong Cheng, Dong Guosong
doaj +1 more source
On allegations of invasive species denialism
Conservation Biology, Volume 33, Issue 4, Page 797-802, August 2019., 2019 Abstract Science denialism retards evidenced‐based policy and practice and should be challenged. It has been a particular concern for mitigating global environmental issues, such as anthropogenic climate change. But allegations of science denialism must also be well founded and evidential or they risk eroding public trust in science and scientists ...
David Munro +2 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2015 以浙江省6大重点水库为研究对象，采用市场价值法、影子工程法和成果参照法等方法对水库生产与供给、娱乐文化和环境调节3大功能类别的9个子服务功能进行分析与价值评估.结果表明，浙江省6大重点水库的生态服务功能总价值为4.1132×1010元• a-1，其中直接价值为2.0228 × 1010元• a-1，间接价值为2.0904 × 1010元• a-1.各水库生态系统服务功能单位面积价值量均值为58.22元• m-2 • a-1，且皎口-周公宅水库>湖山湖水库>汤浦水库>新安江水库>珊溪水库>长潭水库 ...
SUNZuolei(孙作雷) +3 more
doaj +1 more source
Dynamic Evolution of Regional Ecological Services Based on TM Remote Sensing [PDF]
, 2012 针对传统评估区域生态系统服务价值空间异质性的问题,本研究将TM遥感影像与价值评估法相结合,测算出针对研究区域的当量因子表,并建立了只需遥感影像数据即可快速并较为精准地动态计算区域生态系统服务价值的多元回归模型。文章以北京市永定河、厦门市和青海省不同尺度为例,对该方法评估区域生态系统服务价值的可行性和准确性进行了讨论,以期为生态综合管理提供定量化参考依据。This paper discussed the dynamic evaluating of regional ecological services ...
刘俊国 +9 more
core
Ecological cumulative effects of surface mining areas in semi-arid grasslands: Evaluation model and application [PDF]
The research objectives are to reveal the eco-environmental quality of surface mining areas in semi-arid grasslands, separate the ecological cumulative effects of anthropogenic activities and examine their evolving trends.
He REN +4 more
core +1 more source
Ecological Service Function Evaluation of Urban Greening Shrubs in Guanzhong Region, Shaanxi Province [PDF]
, 2023 [Objective] The landscapes and ecological service functions were comprehensively evaluated in order to provide scientific guidance for the selection of urban greening shrub species. [Methods] Several indexes including landscape service functions (such as
Gai Shuaizi +5 more
core +1 more source
Policy &Internet, Volume 18, Issue 1, March 2026.ABSTRACT This article investigates how TikTok Shop reproduces the e‐commerce model of Douyin Shop against a backdrop of divergent regulatory challenges and geopolitical distrust. One of the strategic changes we observe in TikTok Shop is the shift of consumer goods suppliers from local merchants to China‐based sellers.
Shuaishuai Wang, Jing Meng, Yitong Li
wiley +1 more source