Results 51 to 60 of about 8,624 (160)
Spatiotemporal evolution and driving forces of the externality value in rice production: a study of 30 provinces in China from 2000—2021 [PDF]
Research on the indirect value of rice production has primarily focused on ecosystem service functions, with less emphasis on externalities. This article conducts an innovative evaluation of the externality value of rice production and its significant ...
Luo, Lizhuang, Wu, Sibin, Zhou, Rongji
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Atomic‐scale understanding of interstitial‐strengthened high‐entropy alloys
Rare Metals, Volume 44, Issue 9, Page 6002-6014, September 2025.Graphic abstract Abstract Interstitial alloying has emerged as a powerful strategy to tune microstructure and microproperties of high‐entropy alloys (HEAs) due to the strong interaction of interstitials with constituent elements and crystal defects, which enables the development of advanced alloys with superior mechanical and functional properties. The
Qiang Yu, Shi Qiu, Zeng‐Bao Jiao
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Shuitu Baochi Xuebao, 2005 分析水电工程建设前后流域水质时空特征对于研究水电工程对流域水生生态系统以及河岸带生态系统的影响具有重要意义。以澜沧江流域中段为研究区域,通过对10多年的多个断面水质监测资料分析,研究了以铜、铅、锌、镉为代表的金属元素以及氮磷等水质指标的时空分布特征。结果表明:建坝后金属元素的空间分异性比建坝前要明显,但在库区分异性不大;运用ATU(急性毒性度)能更好地反映金属元素指标变化情况,建坝后ATU值小于建坝前,沿干流逐渐减小,时间分异性比建坝前要弱。氮和磷浓度库区比非库区要高,最大值一般出现在大坝出水不远的断面,
姚维科 杨志峰 刘卓 崔保山 董世魁 刘杰
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Shuitu Baochi Xuebao, 2001 湿地土壤养分是时空连续的变异体,不论尺度大小均具有高度的空间异质性.湿地土壤养分变量属于区域化变量,同时具有随机性和结构性,仅运用经典的Fister统计方法已经不能满足土壤空间异质性研究的需要.地统计学是近几十年发展起来的一门新的空间分析方法,其变异函数则适合于定量研究区域化变量空间结构变异特征,能够全面反映区域化变量的结构性.作者在前人的工作基础上意欲用地统计学的区域化变量理论和变异函数对湿地土壤养分的空间异质性进行定量研究,并对其研究方法进行了构想.＃
白军红 余国营 张玉霞
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New Phytologist, Volume 247, Issue 2, Page 504-517, July 2025.Summary Repetitive DNA is a feature of all organisms, ranging from archaea and plants to humans. DNA repeats can be seen both in coding and in noncoding regions of the genome. Due to the recurring nature of the sequences, simple DNA repeats tend to be more prone to errors during replication and repair, resulting in variability in their unit length ...
Sridevi Sureshkumar +3 more
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Ecological Analysis of Bird Communites in Xiamen(Amoy) Intertidal Zone during Spring. [PDF]
, 1999 Sampling investigation in Xiamen intertidal zone during spring indicated that waders were the main components of intertidal avian communities and 44.4% of the components of intertidal avian communities were composed by shorebirds (charadriiformes).Among ...
宋晓军, 陈小麟
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China's Eco‐Civilisation, Climate Leviathan, and Hobbesian Energy Transition
Antipode, Volume 57, Issue 3, Page 830-861, May 2025.Abstract Scholars have hitherto tended to theorise China's ecological civilisation project either as a form of environmental authoritarianism or as a vision of eco‐socialism. This paper contributes to the conversation by conducting a textual analysis of Chinese scholarly discussions on eco‐civilisation.
David Chen
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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
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Shuitu Baochi Xuebao, 2020 为研究小流域尺度下土壤有机碳的变异规律，运用地统计学方法对研究区0—10，10—20，20—40 cm土壤有机碳含量的空间变异性进行了研究。结果表明：流域内不同土层有机碳含量属于中等强度变异，具有强烈的空间自相关性；土壤有机碳含量在0，135°方向上空间变异程度明显，空间分布的各向异性显著；克里格插值结果显示流域内阴坡土壤有机碳含量明显高于阳坡，高海拔区域土壤有机碳含量高于低海拔区域；不同土层间，土壤有机碳含量均表现为青海云杉 > 灌丛 > 草地，表明不同植被类型对土壤有机碳含量和分布有着重要影响 ...
芦倩, 李毅, 刘贤德, 赵维俊
doaj
Landscape Ecology and the Application to Landscape Ecology Planning of Scenery District — Take the Wuyishan Scenery District for Example [PDF]
, 2007 景观生态规划是应用景观生态学原理及其它相关学科的知识，通过研究景观格局与生态过程以及人类活动与景观的相互作用，在景观生态分析、综合及评价的基础上，提出景观最优利用方案、对策及建议。本文系统阐述了景观生态学的基本概念、重要理论和原则，重点介绍了景观生态学中常用的景观指数数量分析方法，并以福建武夷山风景名胜区景观生态规划作为景观生态学应用研究的实例。首先，运用景观分类生态原则和群落生态原则，建立了武夷山名胜区景观二级分类系统，并在此基础上对各景观类型的生态特征进行了计算和分析 ...
陈靓
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