Results 11 to 20 of about 3,323 (101)
Between conflict and coexistence: Wildlife in rubber‐dominated landscapes 冲突与共存之间:橡胶林主导景观中的野生动物
Integrative Conservation, Volume 2, Issue 4, Page 240-254, December 2023., 2023 Natural habitat loss forces some wildlife species to increasingly extend their habitats into farmlands. Rubber‐dominated landscapes surrounding protected areas have the potential to facilitate coexistence between people and some wildlife species if young plants are better protected and plantation management is made more wildlife‐friendly.
Franziska K. Harich‐Wloka +5 more
wiley +1 more source
Journal of Diabetes, Volume 15, Issue 4, Page 289-298, April 2023., 2023 Highlights This long‐term longitudinal study demonstrates the association between alcohol consumption and health outcomes in patients with abnormal glucose metabolism including type 2 diabetes mellitus and prediabetes. Occasional drinking (less than once a week) reduces the risk of all‐cause mortality, while heavy alcohol consumption (≥30 g/day for men
Mengzhao Cui +7 more
wiley +1 more source
Key n‐Gram Extractions and Analyses of Different Registers Based on Attention Network
Journal of Applied Mathematics, Volume 2021, Issue 1, 2021., 2021 Key n -gram extraction can be seen as extracting n‐grams which can distinguish different registers. Keyword (as n = 1, 1‐gram is the keyword) extraction models are generally carried out from two aspects, the feature extraction and the model design.
Haiyan Wu +5 more
wiley +1 more source
Integrative Conservation, Volume 3, Issue 3, Page 168-182, September 2024.Using long‐term field data, we examined the impact of severe droughts on the health, reproductive success, and behavior of the critically endangered Verreaux's sifaka (Propithecus verreauxi) in Madagascar's seasonally dry tropical forest. Despite reduced availability of high‐quality foods, sifaka exhibited stable body condition and reproductive success,
Carrie C. Veilleux +2 more
wiley +1 more source
土壤氮浓度对油松天然林新生枝叶碳氮磷化学计量及其内稳态的影响
Shuitu Baochi Xuebao, 2023 为了解油松(Pinus tabuliformis)天然林新生枝叶碳(C)、氮(N)、磷(P)化学计量特征对土壤氮浓度改变的响应及其林龄差异,揭示不同龄级油松新生枝叶N、P元素内稳态对短期氮添加的响应。以关帝山林区孝文山林场Ⅴ~Ⅶ龄级油松天然次生林为研究对象,采用野外原位氮添加试验的方法,设置对照(N0,0)、低氮(N1,5 g/m2)、中氮(N2,10 g/m2)和高氮(N3,15 g/m2)4个施氮水平,形成不同土壤N浓度梯度,分析不同N浓度新生枝和叶C、N、P计量指标和内稳态指数。油松枝叶C、N ...
闫鑫泽 +7 more
doaj
Shuitu Baochi Xuebao, 2007 黄土高原地区水资源缺乏，水资源，特别是土壤水资源的适度开发和合理利用势在必行。在黄土丘陵半干旱区的上黄生态试验站对多年生人工柠条林林冠截留，地表径流，土壤水分和植物生长等进行了定位观测，对林地土壤水分补给和消耗动态变化规律进行分析。结果表明，人工柠条林次降雨林冠截留随降水量增加而逐渐增加，地表径流与林外降雨量为直线关系。影响土壤水分补给的主要因素为天然降水，其次为林冠截留。土壤水分补给量与降雨量为线性关系；降水对土壤水分的影响程度随深度的增加而减弱，土壤水分最大入渗深度为170～270cm ...
郭忠升, 邵明安
doaj +2 more sources
野生动物学报, 1985 由东北林学院野生动物系40余名师生组成的野外调查队,于1984年12月间在桃山林业局管辖区内,进行为期20余天的野外考察工作。这次考察是受黑龙江省林业厅、桃山林业局的委托,为进行狩猎场的规划、提供了科学的猎捕依据。桃山狩猎场是由国务院批准的我国第一个对外开放的综合性狩猎场。位于黑龙江省伊春市西南部,小兴安岭的南部边缘。具有得天独厚的自然条件,野生动物资源极为丰富。根据文献记载,结合本次实地考察 ...
程骞
doaj
Zhejiang Daxue xuebao. Lixue ban, 2014 群落组成是影响森林演替方向的主要因素之一.浙江省地处我国东部，属典型亚热带气候，全省植被类型多样，物种组成丰富.为了更好地了解浙江省自然保护区内落叶阔叶林群落结构，于2012年在浙江清凉峰自然保护区(QLF)、浙江天目山自然保护区(TMS)、浙江龙王山自然保护区(LWS)、浙江九龙山自然保护区(JLS)、浙江大盘山自然保护区(DPS)5个自然保护区内选取并建立了 12个30 m×30 m不同落叶阔叶群落样地，对样地中胸径(DBH)≥1 cm的木本个体进行了坐标定位和每木调查.结果表明 ...
WONGDongming(翁东明) +7 more
doaj +1 more source
Shuitu Baochi Xuebao, 1996 通过研究１０年生人工马尾松林生态系统１９９３～１９９４年的水文活动及其伴随着这些活动矿质元素的迁移过程。结果表明：就２年的平均值来看，林内蒸发量占全年天然降雨量的４．０％，林冠截留占２０．８％，地表径流占２７．８％；穿透雨和树干茎流分别占７６．５％和２．７％。其中以穿透雨中Ｋ，Ｐ，Ｃａ，Ｍｇ，Ｚｎ，Ｃｕ，Ｆｅ，Ｍｎ元素的浓度最高，次为地表径流，最低为天然降雨。流域收入大于支出，矿质量盈余８．５２８ｋｇ／ｈｍ２。
李飞, 王英芳, 陈永瑞
doaj
Shuitu Baochi Xuebao, 2011 对福建省建瓯市山地红壤的天然林、人工林、次生林、园地和耕地5种典型土地利用方式的不同土层(0-10 cm、10-20 cm)土壤团聚体颗粒有机碳进行研究。结果表明:林地、桔园在大团聚体中表现随着粒径增大颗粒有机碳贮量增加的趋势。天然林转变为其他土地利用方式后,土壤团聚体颗粒有机碳贮量平均下降了74.35%,土壤颗粒有机碳损失发生在各个粒级团聚体中。亚热带山地红壤内林地转变为农地会导致土壤及其团聚体颗粒有机碳含量下降,颗粒有机碳可作为表达土地利用变化敏感性指标。
毛艳玲, 杨玉盛, 崔纪超
doaj