Results 21 to 30 of about 1,607,879 (159)
Evaluating protected areas’ coverage of threats to terrestrial biodiversity
Abstract Protected areas (PAs) are vital for biodiversity conservation and have expanded globally. However, increasing pressures on biodiversity make it difficult to achieve conservation goals. Using threat probability maps based on the International Union for Conservation of Nature Red List and the World Database of Protected Areas, we analyzed the ...
Katherine Pulido‐Chadid +2 more
wiley +1 more source
Abstract Forest cover is positively associated with fish biomass and fisheries yield in the Amazon River floodplain, and many species enter flooded forests to feed, spawn, or seek refuge from predation. Floating macrophyte beds, known as floating meadows, in Amazon floodplains support high fish diversity and serve as nursery habitat for many fishes of ...
Sam Grinstead +6 more
wiley +1 more source
Abstract Large old trees are important ecological entities in human settlements, providing cultural values and ecological services that are threatened by current and future changes in global climate, land use and disturbance regimes. Some studies suggest incorporating social and cultural significance into the conservation of large old trees.
Zhuo Cheng +5 more
wiley +1 more source
Hydro‐Insurgency: Weaponization of Water Resources and Infrastructure in Northeast Syria
ABSTRACT This article examines the strategic weaponization of water resources by Turkey‐backed armed groups in Northeast Syria (NES) within the broader context of the Syrian civil war. As the conflict evolved, water infrastructure—dams, rivers, and irrigation systems—became central to warfare, governance, and foreign agendas. The article introduces the
Farhad Hassan Abdullah Mamshai
wiley +1 more source
为揭示排土场复垦区不同土地利用类型土壤的水源涵养功能,采用野外实地双环入渗试验和室内理化分析方法,系统地研究了海州露天煤矿排土场复垦区不同土地利用类型(乔木林地、灌木林地、农用地、荒草地)土壤入渗特性及其影响因素。结果表明:不同土地利用类型下的土壤初始入渗率、稳定入渗率和累计入渗量均表现为乔木林地>灌木林地>农用地>荒草地;不同土地利用类型下土壤入渗过程的拟合优度存在差异,G-P综合模型、Kastiakov模型、Horton模型的平均拟合优度依次为0.926,0.908,0.905。G ...
吕 刚 +4 more
doaj
This study assessed the potential impacts of climate and land‐use change on soil fungal diversity across four North American biomes. We found that climate change typically caused both diversity losses and gains, particularly in coniferous forests and among arbuscular mycorrhizal fungi, whereas land‐use change mainly reduced diversity, especially in ...
Wenqi Luo +5 more
wiley +1 more source
为揭示滇中尖山河小流域不同土地利用类型的侵蚀特性,以滇中尖山河小流域4种不同土地利用类型(坡耕地、裸地、林地、园地)不同土层(0-10,10-20,20-30 cm)土壤为研究对象,通过对土壤抗蚀性15个指标的测定与分析,研究了不同土地利用类型对土壤抗蚀性的影响。结果表明:不同土地利用类型中坡耕地、裸地>5 mm土壤水稳性团聚体显著低于林地、园地,>5 mm水稳性团聚体含量表现为裸地(12.72%)大于坡耕地(8.93%),且坡耕地>0.25 mm团聚体随土层深度的增加而降低 ...
张华渝, 王克勤, 宋娅丽
doaj
运用遥感和地理信息系统技术,提取了小江流域1987,1995年和2000年土地利用空间数据,分析了1987~2000年间小江流域土地利用类型变化的幅度、速度以及类型之间相互转移,并应用马尔柯夫概率模型对小江流域2015年土地利用格局进行了预测。结果表明:13年来小江流域耕地、林地以及城乡工矿用地面积均显著增加,其中耕地增加最为显著,由1987年的345.1km^2增加到2000年的398.7km^2。小江流域土地利用变化速度很快,年均变化速度达0.49%;对单一土地利用类型来说 ...
贾松伟, 韦方强, 崔鹏
doaj +2 more sources
Abstract Primates, 69% of which are threatened with extinction, are the third most specious order of mammals. We used primates as model taxa to examine the umbrella effects of primates on ecosystem services and the protection of other vertebrates and seed plants in Yunnan Province, China.
Yin Yang +21 more
wiley +1 more source
以阜康市为例,在遥感和地理信息系统技术的支持下,利用土地利用类型结构的分形模型,计算了阜康市各土地利用类型斑块的分维数和稳定性指数。结果表明:阜康市各土地利用类型斑块的面积-周长双对数关系显著,即阜康市土地利用类型空间分形结构客观存在;各土地利用类型图斑的分维数存在差异,分维数最大的是城乡工矿居民用地,为1.4096,最小的是耕地,为1.0986;在各土地利用类型的稳定性指数中,耕地的稳定性指数最高,为0.4014,城乡工矿居民用地的稳定性指数最低,为0.0904;各土地利用类型的平均分维数为1 ...
卢磊 +5 more
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