Results 11 to 20 of about 9,608 (155)
Integrative Conservation, EarlyView.Urbanization may alter bird foraging. Austral Parakeets (Enicognathus ferrugineus) in Patagonia rely on introduced plants in urban areas, especially in winter, despite preferring natives in the wild. This seasonal reliance on introduced species highlights urbanization trade‐offs and underscores the need to manage green areas with native plants to ...
Rocío Bahía +2 more
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Shuitu Baochi Xuebao, 2005 用地统计学的方法,研究了黄灌沙区农田耕作层(030 cm)土壤的有机质、全氮、碱解氮、速效磷、速效钾、pH和电导率的空间变异规律。结果表明,农田耕作层土壤养分的空间异质性主要由随机性因子如土壤耕作措施,包括施肥、灌溉和作物轮作等造成,这与该区农田耕作层土壤是引黄灌溉改良的结果有关。土壤养分含量的变异函数均可很好地拟合成线性模型,块金值和基台值之比(C0/C0 C)均为1,说明随机性因子是导致该区土壤性状空间变异的主要因素,在整个尺度上具有恒定的变异,造成了土壤性状的相对均一。pH的变异函数为指数模型 ...
贾晓红 李新荣 周海燕 樊恒文 赵金龙 李元寿
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Spatia-l temporal variability of soil salt content before and after irrigation in the Yellow River Delta [PDF]
, 2013 分别采用传统统计学和地统计学方法,定量分析了灌溉前、后黄河三角洲田块尺度下不同深度土层含盐量的空间变异性并分析空间分布特征。结果表明:除灌溉前0~10 cm土层土壤含盐量呈强变异性外,其余各土层含盐量均表现为中等变异强度;灌溉前土壤盐分主要积聚在0~10 cm和40~60 cm土层,灌溉后主要积聚在40~60 cm土层;灌溉使得0~10 cm和10~20 cm土层土壤含盐量降低,脱盐效果较好;除灌溉后0~10 cm土层的土壤盐分含量呈现弱空间相关性之外,其它土层均呈现强空间相关性;灌溉后与灌溉前相比 ...
于君宝 +4 more
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Dynamic Simulation of Soil Moisture Under Typical Land Preparation in Semi-arid Loess Area Using HYDRUS-1D Model [PDF]
, 2023 [Objective] The dynamic characteristics of soil moisture under different land preparation measures were analyzed in order to provide a scientific basis for assessing the eco-hydrological benefits of slope land preparations and for promoting vegetation ...
Dong Hongxia, Wei Qiang, Zhang Qindi
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Integrative Conservation, EarlyView.We collated detections of the sun bear from new and previously published camera trap studies across its range. We then analysed these detections at two different spatial scales to assess the habitat associations and diel activity of this species. We found that the sun bear is tolerant to moderate habitat disturbances. ABSTRACT Degraded tropical forests,
Alexander Hendry +5 more
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土壤呼吸作用时空动态变化及其影响机制研究与展望. [PDF]
, 2009 测定不同陆地生态系统土壤呼吸速率及其时空波动,阐明其影响因子,对于全球碳素平衡预算和全球变化潜在效应估计是最为基本的数据。然而,有关土壤呼吸作用变异性及其影响因素的知识仍存在局限性,一些关键的过程和机制还有待阐明。该文综述了近年来土壤呼吸作用时空动态规律、影响机制和模拟方面的研究进展,指出环境因子和生物因子共同驱动着土壤呼吸作用的时间动态变化;土壤呼吸作用在不同时间尺度上还具有明显的空间异质性,这主要是植被覆盖、根系分布、主要的环境因素和土壤特性空间分布的异质性造成的 ...
周广胜., 韩广轩
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Justice in coexistence: Pastoralism and large carnivores on the Qinghai‐Tibet Plateau
People and Nature, EarlyView.Abstract The conflict between livestock husbandry and large carnivore conservation presents significant challenges in grassland ecosystems worldwide. Achieving sustainable coexistence among herders, livestock and large carnivores requires reconciling diverse perspectives and interests through equitable, inclusive and fair processes that address both ...
Yufang Gao, Yue Yu
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Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Decomposition is the transformation of dead organic matter into its inorganic constituents. In most biomes, decomposition rates can be accurately predicted with simple mathematical models, but these models have long under‐predicted decomposition in globally extensive ...
Heather L. Throop +8 more
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Shuitu Baochi Xuebao, 2006 利用地统计学方法，在两个尺度下对蘩顶山茶园土壤颗粒组成的空间变异性进行了研究。结果表明：（1）小尺度下土壤颗粒组成各粒级均具有强烈的空间相关性．其中粘粒的空间相关距最大．粗粉粒的空间相关距最小；土壤颗粒组成各粒级主要在东、东南和东北3个方向上具有较强的空间变异，除砂粒外的其它颗粒均在东南方向空间变异明显；各粒级的空间分布没有明显的规律可寻。（2）微尺度下只有粘粒具有强烈的空间相关性，砂粒具有中等空间相关性，其余粒级空间相关性很弱，粘粒空间相关距最小；除砂粒外的其它粒级在东南方向具有明显的空间变异 ...
冯娜娜 +4 more
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Shuitu Baochi Xuebao, 2023 喀斯特坡面伴随有大量直径＞25 cm的块石出露,为探明块石出露对土壤理化性质的影响,以坡面4个块石出露的农地和1个对照组为研究对象,分析土壤理化性质空间变异特征。结果表明:(1)在块石出露的农地中,土壤容重、黏粒、粉粒和砂粒的变化分别为0.87~1.42 g/cm3,25.70%~41.80%,38.11%~51.60%,13.76%~27.54%,土壤容重、黏粒和粉粒空间变异性均为弱且高于对照组,砂粒空间变异性为中等且低于对照组。(2)土壤全碳、全氮、全磷、全钾变化分别为9.82~23.13,0.94~
陈磊, 张卓栋, 李业桐
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