Results 11 to 20 of about 613 (100)
Wildlife Letters, Volume 3, Issue 2, Page 73-83, June 2025.Blue sheep in Dhorpatan Hunting Reserve prefer alpine grasslands at 3800–4200 m on south‐facing slopes near water resources, favoring areas with low tree cover and dense ground cover, particularly rhododendrons, junipers, and Cyperaceae grasses. Their habitat significantly overlaps with livestock.
Amit Adhikari +4 more
wiley +1 more source
Understanding consumers to inform market interventions for Singapore's shark fin trade
People and Nature, Volume 6, Issue 2, Page 733-748, April 2024.Abstract Sharks, rays and their cartilaginous relatives (Class Chondrichthyes, herein ‘sharks’) are among the world's most threatened species groups, primarily due to overfishing, which in turn is driven by complex market forces including demand for fins.
Christina Choy +2 more
wiley +1 more source
Integrative Conservation, Volume 3, Issue 1, Page 76-86, March 2024.Jigme Dorji National Park is the exclusive refuge for the critically endangered Bhutan poppy in Bhutan and worldwide, confined to alpine screes in Tshophu, Tshophu base and Jichudrakey base in Soe gewog, Thimphu. The primary conservation threats to this species stem from harvesting, grazing and trampling by livestock, despite the majority of Bhutan ...
Pema Dendup +3 more
wiley +1 more source
Integrative Conservation, Volume 3, Issue 1, Page 22-35, March 2024.Rubber plantations that are larger in size and remotely located have a higher probability of being linked to forest loss and degradation. The global rubber price can act as a significant driver of both deforestation and degradation. Identifying high‐risk plantations and mitigating associated threats could help curb future forest loss due to rubber ...
H. Manjari Jayathilake +4 more
wiley +1 more source
Shuitu Baochi Xuebao, 2004 定量分析评价水蚀风蚀交错带土壤侵蚀的坡向差异对于土壤侵蚀防治具有重要意义。通过对黄土高原水蚀风蚀交错带六道沟流域一个典型峁坡不同坡向及坡位土壤剖面中137Cs含量的分析研究,表明研究区内梁峁地形的坡向侵蚀差异明显,各坡向平均侵蚀速率大小依次是北坡>东坡>南坡>西坡,南北坡侵蚀差异与黄土丘陵区其它区域相反,分析认为,这与该区域水蚀、风蚀叠加的特殊侵蚀外营力有关,并根据南北坡侵蚀速率的差值估算出该区域风蚀所占比例至少大于18%;峁坡各坡向不同坡位侵蚀差异明显,坡面下部侵蚀最严重,坡面上部和中部次之 ...
李勉 李占斌 刘普灵 崔灵周 李雅琦
doaj
Shuitu Baochi Xuebao, 2005 运用统计学方法,对黄土高原神木水蚀风蚀交错带退耕坡地土壤水分空间变异性及其影响因子进行研究. 结果表明(1)土壤水分含量在垂直剖面方向表现出随深度增加,土壤水分含量呈增加趋势,在100 cm土层内变异最大,在100 cm以下其变化的梯度基本趋于稳定;(2)土壤水分含量沿坡长方向(即坡顶到坡下)呈波浪状递增趋势,且在各坡位变异程度不一,呈现出变异程度为坡上＞坡中＞坡下的趋势;(3)土壤水分含量沿垂直于坡长方向表现为阴坡＞山脊＞阳坡的明显趋势,其变异程度表现为阳坡＞阴坡的趋势 ...
刘春利 邵明安 张兴昌 李世清
doaj +2 more sources
Shuitu Baochi Xuebao, 2023 探究不同人为管理措施坡耕地地表微地形变化特征,阐明地表微地形变化对渗流响应,以期为紫色土坡耕地水土流失的有效防治与人为管理措施的合理布设提供科学依据。以平整坡面、穴播坡面和垄作坡面为研究对象,基于室内人工模拟渗流试验,开展5°和15°紫色土坡面微地形变化特征研究。结果表明:(1)渗流试验前后平整坡面、垄作坡面和穴播坡面微地形半方差函数在0~135°和180°~315°方向上呈中心对称分布,随地表坡度的增加分布范围逐渐缩小,且具有明显的方向性。渗流条件下,平整坡面和穴播坡面微地形各向异性的变化趋势较为一致,
杨斐雄 +3 more
doaj
Shuitu Baochi Xuebao, 2008 研究了横断山区北段金沙江以东雀儿山至二郎山等山地土壤属性的坡向性分异规律。结果表明,山地迎风坡由于水分条件优于背风坡,其土壤的生物积累和盐基风化淋溶一般强于背风坡,主要表现在迎风坡土壤的有机质和全氮含量、表层土壤全磷含量、阳离子交换量和速效钾含量高于背风坡土壤;迎风坡土壤的pH、盐基饱和度和基带土壤的钙化及碱性化程度低于背风坡土壤。这种分异在水平方向上,二郎山最为显著,由此向西至雀儿山随季风势力的减弱而减小;在垂直方向上,一般在山麓基带土壤最为明显,沿山体向上至山脊,两坡间的差异逐渐减小甚至趋同 ...
PU, LIU, ZHANG, LONG, LU
doaj
Shuitu Baochi Xuebao, 2022 为探究不同立地条件下沙棘土壤水分分布特征和生长情况，采用样地试验，设置2种坡向（阴坡、阳坡）和3种坡位（坡顶、坡中、坡底）进行研究。研究表明：（1）各样地内的土壤水分季节变化可划分为消耗期（5—6月）、快速补充期（6—7月）和消退期（7—9月），天然降水对土壤含水率影响较大；（2）各样地内的土壤水分垂直分布为土壤水分显著变化层（Cv>0.2）、土壤水分次变化层（0.2>Cv>0.1）和土壤水分相对稳定层（Cv阳坡，不同坡位表现为坡底>坡中>坡顶。研究结果可为玛纳斯县前山地带沙棘造林提供参考和理论依据。
闵梓骁 +5 more
doaj
Shuitu Baochi Xuebao, 2019 选择内蒙古鄂尔多斯准格尔旗不同类型砒砂岩区，通过野外采样和室内分析试验，研究了土壤有机质和速效钾特征，并探讨不同土层、坡位和坡向以及植被丰富度等因子对其影响。结果表明：（1）整体上看，覆土区、覆沙区和裸露区有机质含量介于6.65~7.41 g/kg，处于低水平，速效钾含量介于74.61~137.38 mg/kg，处于中高水平。（2）覆土区地形因子对土壤有机质和速效钾的影响最明显，根据3个不同类型区坡向、坡位及坡向与坡位的交互作用对土壤有机质、速效钾呈现的显著或者极显著关系出现频数 ...
邢启鑫 +4 more
doaj