Results 61 to 70 of about 11,089 (155)
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
core +2 more sources
International Journal of Applied Linguistics, Volume 36, Issue 2, Page 979-994, May 2026.ABSTRACT Previous research has established the relationships between motivation, anxiety, teachers’ support, and self‐regulated learning (SRL) in English‐as‐a‐foreign‐language (EFL) learning. Most of the studies, however, have taken a variable‐centered approach in addressing the variable correlations, while learners’ characteristics and variable links ...
Yuhong Jiao, Barry Bai, Jing Li
wiley +1 more source
耦合生态系统服务供求关系的生态安全格局动态分析——以闽三角城市群为例 [PDF]
, 2018 实现分区管理是缓解城市群生态安全空间差异的有利途径。基于供求理论构建了生态系统服务供求关系动态模型框架,并利用供给与需求的象限区划表征闽三角城市群生态安全格局;在不同的尺度变换上,运用价值单量修正模型、INVEST生境质量模型、景观指数模型、生态韧性模型、熵权法等方法综合测度城市群生态系统服务供求水平,实现生态安全格局的分区化;引入环境库兹涅茨曲线理论解析区域生态安全格局现状和成因;数据分析借助Arc GIS可视化表示。研究发现:(1)闽三角城市群存在50%区域属于生态安全高供给失衡区,其中70 ...
曹文志, 王飞飞, 黄智洵
core
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Piezocatalytic technology utilizes mechanical strain or stress‐induced piezoelectric phenomena to produce robust internal electric fields, markedly improving the separation efficiency of e−‐h+ pairs. This method has emerged as a focal point in catalysis by removing reliance on conventional light or electrical energy via its mechanical‐to ...
Yue Zhou +5 more
wiley +1 more source
Functional Ecology, Volume 40, Issue 4, Page 983-1000, April 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Organic phosphorus mineralization is a critical process in the phosphorus cycle, governing phosphorus bioavailability for plants. The PhoD gene, which encodes the key enzyme alkaline phosphatase, serves as a valuable biomarker for this process.
Sandhya Mishra +3 more
wiley +1 more source
Shuitu Baochi Xuebao, 2007 采用地统计学的变异函数分析方法，定量研究了14年生水曲柳人工林表层土壤（0～10cm）养分的空间异质性特征。结果表明：（1）土壤有效磷、全钾和速效钾变异函数曲线的理论模型符合指数模型，土壤pH值符合球状模型，土壤全氮、水解氮和全磷的理论模型符合指数模型或球状模型；（2）土壤养分各项指标的空间变异主要是由结构性因素引起，且空间自相关程度均属中等以上（空间结构比均在25％以上）；（3）土壤pH值的空间自相关范围最大（2．27～4．46m），土壤全磷的自相关范围（0.73～0．97m）小于全钾和全氮（分别为1．
孙志虎, 王庆成
doaj +2 more sources
Conservation Biology, Volume 40, Issue 2, April 2026.Abstract The Natura 2000 (N2K) network of protected areas is one of the main tools for area‐based conservation in the European Union (EU), yet its role in preserving plant biodiversity requires better understanding. We examined data kept in the European Vegetation Archive from over 1.2 million vegetation plots and obtained over 14.2 million plant ...
Michele Di Musciano +41 more
wiley +1 more source
The Spatio-temporal Evolution of NDVI in the Three Gorges Reservoir Area Driven by the Synergistic Effect of two Factors over the Past 21 Years [PDF]
[Objective] To clarify the spatio-temporal characteristics of vegetation evolution in the Three Gorges Reservoir Area, and to quantitatively analyze the relationships between vegetation and key determinants, including climate, terrain, and human ...
LI Cheng +5 more
core +1 more source
Shuitu Baochi Xuebao, 2003 利用地统计学和地理信息系统相结合的方法研究了沈阳市郊耕地1991个样本0～20cm耕层土壤交换性铁含量的空间异质性特征，绘制了交换性铁含量的空间分布图，结果表明，土壤交换性铁含量基本符合正态分布，变异函数的最佳理论模型为球状模型，交换性铁含量具有中等的空间相关性（Co与Co C比值为41.3%，空间自相关距离为34.9km），Kriging内插图显示出交换性铁具有较强的空间质异性，其空间异质性主要受成土母质，成土过程和土壤类型等结构性因子的影响。
姜勇 张玉革 等
doaj +2 more sources
Shuitu Baochi Xuebao, 2007 用经典统计分析和地统计学的方法，对中国生态系统研究网络（CERN）临泽站新设置的农田生态系统综合观测场土壤性状的空间分布特性进行研究。结果表明，除pH外，土壤有机碳、全N、速效养分和电导率的变异性均超过20％，有机碳和全N的空间相关距离为13．8m和12．6m，表现出较高的空间异质性。克里格插值结果同样显示土壤各性状在研究的尺度上有明显的空间变异格局。相对误差为10％时采集124个土样才可达到95％的置信水平。作为生态网络长期监测样地，必须按空间异质性对观测场地进行采样分区、匀地过渡 ...
王芳, 苏永中
doaj