Results 1 to 10 of about 18,289 (114)
Shuitu Baochi Xuebao, 2021 为了阐明灌丛沙堆发育对土壤碳（C）、氮（N）、磷（P）生态化学计量特征的影响，以吉兰泰荒漠区不同演化阶段白刺（Nitraria tangutorun）灌丛沙堆为研究对象，研究0—100 cm土层土壤C：N：P化学计量特征在不同演化阶段的变化规律和垂直分布规律。结果表明：（1）白刺灌丛沙堆土壤有机碳（SOC）、全氮（TN）和全磷（TP）随演化阶段（雏形阶段→发育阶段→稳定阶段→衰亡阶段）的变化呈先增后减的变化趋势。演化阶段对白刺灌丛沙堆SOC影响显著（P0.05），其SOC、TN、TP均值含量在0—100
魏亚娟 +5 more
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Shuitu Baochi Xuebao, 2021 为探讨植被类型及生长季阶段对土壤碳氮磷生态化学计量特征的影响，揭示黄土丘陵区陆地生态系统养分限制及循环规律。以黄土丘陵区典型荒草地（Grassland）、苜蓿（Medicago Sativa）地、沙棘（Hippophae rhamnoides）灌木地、文冠果（Xanthoceras sorbifolium）林地、云杉（Picea asperata）林地为研究对象，分析其0—60 cm土壤有机碳（SOC）、全氮（TN）、全磷（TP）含量及化学计量比特征在植被类型间及生长季阶段内的差异。结果表明：（1 ...
刘帅楠 +5 more
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Shuitu Baochi Xuebao, 2006 基于遥感和生态学的方法．对1988～2001年辽河三角洲湿地类型及面积变化所引起的最小、最适和最大生态环境需水量变化和各类湿地的单位面积生态环境需水量进行了分析。结果表明，1988～2001年辽河三角洲湿地变化引起的生态环境需水总量的变化不到3％，但面积变化对各类湿地生态环境需水量的影响却相当明显；各类湿地单位面积生态环境需水量的总排序为河流-沟渠〉湖泊-坑塘-水库=养殖用地〉水田〉苇田〉潮上带高滩。研究成果可为辽河三角洲水资源规划中湿地生态保护、区域农业结构调整所引起的生态环境需水量计算提供科学依据 ...
李加林, 赵寒冰, 刘闯, 曹云刚
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黄土丘陵区油松人工林植物器官—凋落物—土壤化学计量特征的季节变化
Shuitu Baochi Xuebao, 2022 为了解黄土丘陵区油松人工林植物器官—凋落物—土壤的化学计量特征随季节的变化规律，通过时空替代法、野外调查取样与室内试验的手段，以陕西省延安市安塞区纸坊沟流域中林龄油松（Pinus tabuliformis）人工林为对象，分析了4—10月油松不同器官—凋落物—土壤的碳（C）、氮（N）、磷（P）生态化学计量学特征。结果表明：（1）从4—10月，叶片C、P含量逐渐上升，在10月最高，叶片的N含量和N：P及枝的N、P含量均先减小后增大，且均在8月最低，而枝的C：N及C：P和细根的C：P、N：P均先增大后减小 ...
王亚娟 +5 more
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Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Permafrost thaw is reshaping nutrient dynamics in boreal forests, but its impacts on tree nutrient limitation and functional strategies remain poorly understood. Clarifying these responses is crucial for predicting the response of boreal forests to climate change.
Qiyue Fu +9 more
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凋落物双倍添加和移除对米槠林土壤水解酶活性及其化学计量比的影响
Shuitu Baochi Xuebao, 2021 土壤酶与土壤养分紧密相关，并能够活化土壤中营养元素从而改善土壤环境质量，为更加深入了解全球气候变化背景下森林凋落物数量的变化及其酶化学计量比的影响，以亚热带米槠林为研究对象设计随机区组试验，设置3种凋落物处理（移除凋落物（NRNL）、添加双倍凋落物（NRDL）、保留凋落物（CK）），通过测定土壤微生物生物量碳、氮和水解酶活性（β—葡萄糖苷酶（βG）、纤维素水解酶（CBH）、β—N—乙酰氨基葡萄糖苷酶（NAG）、亮氨酸氨基肽酶（LAP）、酸性磷酸酶（AP ...
陆宇明 +5 more
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Comprehensive framework for assessing and optimizing existing research networks
Conservation Biology, EarlyView.Abstract Conservation, monitoring, and research networks, or collections of ecological research sites unified under a common mission of data collection or a research mission, are essential infrastructure for understanding large landscapes. However, most networks developed opportunistically over decades rather than through systematic design, creating ...
Alyson East +2 more
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Changes in the transformative potential of action proposals in Finnish Red Lists from 1986 to 2019
Conservation Biology, EarlyView.Abstract Red lists provide critical knowledge regarding biodiversity decline, especially in Finland, where broad assessments have been made regularly since the 1980s. They deliver information on the threat status of species and ecosystems, propose actions to guide conservation policy, and have the potential to spur transformative change.
Anni Arponen +4 more
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Shuitu Baochi Xuebao, 2023 为阐明三峡库区坡耕地典型香榧套种模式对土壤碳(C)、氮(N)、磷(P)含量及其生态化学计量特征的影响,在重庆市云阳县宝坪镇香榧种植基地内,选取香榧纯林(TG)、香榧-黄精(TGP)、香榧-大豆(TGG)3种套种模式为研究对象,分析不同模式及土层深度下土壤C、N、P含量及其生态化学计量特征。结果表明:不同模式的土壤C含量无显著差异,N、P含量均表现为TGG(0.80,0.53 g/kg)>TGP(0.71,0.40 g/kg)>TG(0.56,0.39 g/kg),且与TG相比,TGG的N ...
陈胜伦 +6 more
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Psychometric framework for coexistence with large carnivores
Conservation Biology, EarlyView.Abstract Human–carnivore coexistence is essential for biodiversity conservation, yet measuring the attitudes and behaviors that support it remains methodologically challenging. We developed psychometric scales to assess willingness to coexist with carnivores and the underlying beliefs of this coexistence through an iterative expert elicitation process ...
Benjamin Ghasemi +14 more
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