Results 1 to 10 of about 10,036 (104)
Shuitu Baochi Xuebao, 2007 以毛乌素沙地丘间低地不同年龄(2~4年)沙柳为研究对象,采用地统计学方法对各年龄沙柳表层(0~20cm)土壤水分与容重空间变异进行研究。结果表明:随着年龄的增长,表层土壤水分含量表现出增大的趋势,且各年龄沙柳表层土壤水分含量间表现出一定的差异性(P0.05)。
姚月锋, 蔡体久
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Shuitu Baochi Xuebao, 2020 通过泰森多边形加权变差系数法研究了黄河中游无定河流域黄土区降水和侵蚀产沙的空间变异规律，并用线性回归分析探究两者空间变异性的相关性。以黄河主要泥沙来源区之-的无定河流域为例，分析了该流域黄土区1959—2015年水土保持措施综合治理前后降水和侵蚀产沙的时空变异规律，所选用的降水特征为汛期降水（Pflood）和汛期降雨侵蚀力（Rflood），用产沙模数（SSY）表示该流域产沙量的多少。结果表明：（1）在水土流失治理前（1959—1970年），该地区降水特征与产沙模数在时间上的增减变化趋势-致 ...
张萍, 郑明国, 蔡强国, 马小晴
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Shuitu Baochi Xuebao, 2005 采用地统计学的方法，研究了科尔沁沙地沙质草场土壤含水量对干旱和降雨响应的空间变异规律。结果表明，干旱时沙质草场表层(0～20cm)、亚表层(20～40cm)土壤含水量可很好地拟合成球状模型和指数模型，在1～2．26m，1～6．63m的中等尺度范围内表现出很高的空间自相关性，空间自相关度分别为0．92，0．87．分维数均表现出较弱的空间依赖性．分别为1．99，1．94，两层土壤含水量变异特征差异小，土壤水分的空间变异性强，破碎化程度高。降雨后沙质草场土壤表层 ...
左小安 赵学勇 赵哈林 李玉霖 移小勇 黄刚
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Wildlife Letters, EarlyView.Using radiotelemetry, we found that the movement and home range of the endangered Sacalia bealei varied significantly across reproductive classes and seasons, with males exhibiting greater movement than females during wet and mating seasons. The species exhibits strong aquatic dependence, favoring deep pools interspaced among riffle‐pool sequences ...
Wing Sing Chan +3 more
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Shuitu Baochi Xuebao, 2007 采用地统计学的方法,研究了江西泰和退化红壤区不同模式重建森林在高温干旱季节土壤水分空间变异规律及其分布格局。结果表明,在该研究尺度下,湿地松纯林、枫香纯林、湿地松与枫香混交林0~20 cm,20~40cm土层含水量分布都符合正态分布,都可较好地拟合成球状模型,表现出明显的空间相关性和空间分布格局。3种重建模式样地0~20 cm,20~40 cm层土壤含水量变异函数的基台值、变程都较无林荒地明显增大,而且基台值和变程在0~20 cm,20~40 cm两土层间的差异明显大于无林荒地,说明植被恢复以后 ...
杜志勇 +3 more
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Wildlife Letters, EarlyView.Human‐caused leopard deaths in Sri Lanka averaged 9.65 ± 4.5 records year−1 over 17 years (2008–2024; n = 164), with records highly clustered in the central highland mosaic ecosystem. Mortality was dominated by adult males and driven primarily by snaring in plantation landscapes, and indicating an increase approximately 0.7–0.8 deaths per year.
Sanjaya Weerakkody +11 more
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Wildlife Letters, EarlyView.We used spatially explicit capture‐recapture to estimate jaguar densities in a private reserve in the Colombian Llanos and quantified land cover change in and around the reserve from 2014 to 2024. Densities increased 22% since 2014, while disturbed land cover increased by 39%–54% around the reserve depending on buffer distance. Our study indicates that
Valeria Boron +7 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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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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Organ‐specific ozone and nitrogen legacies strengthen substrate control over litter decomposition
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Elevated tropospheric ozone (O3) and nitrogen (N) deposition are concurrent atmospheric changes that strongly influence terrestrial carbon cycling, yet their combined effects on below‐ground decomposition remain poorly understood.
Xiaofan Hou +8 more
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