Results 11 to 20 of about 2,655 (159)
World Water Policy, Volume 9, Issue 3, Page 456-480, August 2023., 2023 Abstract Groundwater is a vital resource under threat in island communities. Karainagar, a 22 km2 island, is one of seven islands off the coast of Jaffna in Northern Sri Lanka, with its population of just about 11,000 persons, experiences seasonal water shortage, and salinity in groundwater as twin threats impacting on their lives.
Inthirakumaran Karthiga +3 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2015 基于浙江天目山国家级自然保护区常绿落叶阔叶混交林1 hm2样地调查数据，采用空间代替时间和点格局分析法，探究了交让木种群的结构特征、不同生长阶段的空间分布格局及其相互关系.结果表明：(1)交让木种群的径级结构大体呈倒J型，属增长型种群.(2)排除生境异质性影响，交让木幼苗、幼树、中树以及整个种群在1~3 m尺度上呈现微弱的均匀分布格局，其他尺度上呈现随机分布格局.(3)交让木中树与幼树之间基本呈微弱的负相关或无关联性；幼树与幼苗在小尺度区域内呈负相关，随空间尺度增大负相关性减弱至无关联性 ...
ZHAOMingshui(赵明水) +4 more
doaj +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2018 青海省宗教发展历史悠久，宗教旅游资源丰富，宗教场所的空间分布特征对青海省区域旅游格局有重要影响.对青海省宗教场所旅游资源进行了统计，分别从空间分布模式、差异性、密度等方面采用最邻近指数、地理集中指数、洛伦茨曲线、核密度方法对其空间格局特征进行了定量分析，并利用空间回归分析法探讨了其分布与海拔、坡度、交通、水系等因素的关系.结果表明：青海省宗教场所旅游资源呈“东多西少”的集聚分布态势，空间差异显著，旅游资源集中在青海省11%地区；空间分布密度呈由东向西辐射（型）的分布趋势；空间回归分析结果显示，在地势平坦、
ZHULitao(朱利涛) +3 more
doaj +1 more source
The Analysis of Transport Infrastructure and Industrial Agglomeration on the Basis of New Economic Geography Perspective [PDF]
, 2013 交通基础设施作为经济发展的先行资本一直以来都是经济学界研究的焦点。二十世纪九十年代以来快速兴起的新经济地理学，由于考虑经济活动的地理关联性，在传统分析框架之中引入了空间维度而使得分析更加贴近经济现实，也更具有说服力。新经济地理学的核心理论认为，运输成本的变化会改变向心力与离心力之间的平衡关系，从而会对产业的空间聚散产生显著影响。因此，作为运输成本实物载体的交通基础设施与产业空间分布之间的关系也成为当前研究的热点问题。 为此，本文以中国31个省市为主要研究对象，首先，从交通基础设施发展程度入手 ...
陈夏琳
core +3 more sources
Spatio-temporal Differentiation and Driving Factors of Farmland Ecosystem Carbon Source-Sink Effects in Guangdong Province [PDF]
, 2023 [Objective] The spatio-temporal differentiation and driving factors of farmland ecosystem carbon source-sink effects in Guangdong Province were analyzed in order to provide a valuable reference for the scientific and rational formulation of regional ...
Bin Jinyou, Tang Xiaobing
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Soil and Water Conservation and Ecological Benefits of Forest Ecosystem in New Urban Karst Areas of Central Guizhou Province [PDF]
, 2022 [Objective] Soil and water conservation and ecological benefits of forest ecosystem in the new urban karst areas of Guanshanhu District, Guiyang City in Central Guizhou Province were studied to scientifically evaluate the achievements of ecological ...
Dai Zhengjiao +6 more
core +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2014 基于浙江省天目山常绿阔叶林1 hm2样地调查数据，应用点格局方法分析了 3种优势种细叶青冈(Cyclobalanopsis gracilis) 、杉木(Cryptomeria fortunei)、短尾柯(Lithocarpus brevicaudatus)的空间分布格局，对比了优势种不同生长阶段（幼苗、幼树、中树、大树）的空间分布格局以及不同生长阶段之间的空间关联性.结果表明：(1)3个主要优势种并未受到明显的生境异质性的影响，总体呈现随机分布格局，其中短尾柯由于具有较高的根蘖率，导致在中树种群阶段于2~
SHENMingliang(申明亮) +5 more
doaj +1 more source
野生动物学报, 2021 为掌握喀斯特地区同域分布的小麂（Muntiacus reevesi）和毛冠鹿（Elaphodus cephalophus）共存的时空分化格局，利用公里网格布设的红外相机对贵州麻阳河国家级自然保护区内的这2种鹿类进行监测。于2019年2—8月，在151个网格位点分别获得1328张小麂和167张毛冠鹿的独立有效照片，总有效工作时长21234 d。结果表明：（1）在时间活动节律上，小麂与毛冠鹿均属晨昏活动型，均在7月活动强度最高，日和季节性活动节律上两者均无显著差异（P>005），仅日活动高峰有所不同。（2）
邹启先 1# 彭彩淳 2 +4 more
doaj
Spatiotemporal Characteristics of Vegetation Cover and Climate Driving Factors in Sichuan Province from 2000 to 2020 [PDF]
, 2022 [Objective] The vegetation change and important climate factors influencing fractional vegetation coverage (FVC) in Sichuan Province were analyzed in order to provide theoretical support for the sustainable development of natural resources in this area. [
Sun Mengxin +4 more
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Effects of Different Ecological Restoration Measures on Reconstruction of Slope Vegetation in Southeastern Xizang Autonomous Region [PDF]
, 2023 [Objective] The effects of environmental factors on the plant community of a slope during ecological restoration objective of Pai-Mo Highway in Qinghai-Xizang Plateau were analyzed in order to provide theoretical basis for ecological restoration plan of ...
Huang Mengyue +9 more
core +1 more source