Results 21 to 30 of about 101,077 (157)
The need for carbon finance schemes to tackle overexploitation of tropical forest wildlife
Conservation Biology, Volume 39, Issue 1, February 2025.Abstract Defaunation of tropical forests, particularly from unsustainable hunting, has diminished populations of key seed dispersers for many tree species, driving shifts in forest community composition toward small‐fruited or wind‐dispersed trees with low wood density. Such shifts can reduce aboveground biomass, prompting calls for overexploitation to
Caroline E. Milson +3 more
wiley +1 more source
, 2015 本发明公开一种人工模拟降雨雾化的方法和装置，所述装置包括：水气两用喷头、高压导气管、空气压缩机和变频器，其中，所述水气两用喷头的进水口与降雨管路的供水端口连接，所述水气两用喷头的进气口与高压导气管的一端连接，所述高压导气管的另一端连接空气压缩机，所述空气压缩机与变频器相连。本发明在小雨强降雨的时候打开空气压缩机将带有压力的空气通过水气两用喷头与被降雨水混合，通过高压气体将被降雨水喷射，从而达到预设喷射角度和雾化效果，避免了现有人工降雨设备的不足。另外，通过调节变频器，可以根据雨强调整空气压缩机的输出气压，
李世海 +5 more
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Shuitu Baochi Xuebao, 2016 为揭示雨强对喀斯特坡耕地养分流失的影响，运用可调坡度、地下孔（裂）隙度试验钢槽装填土石模拟喀斯特裸露坡耕地，采用人工模拟降雨的方法研究不同雨强下喀斯特裸坡径流养分流失特征。结果表明：（1）雨强为15，30 mm/h时地表不产流，雨强50 mm/h时地表有产流；试验雨强下地下孔（裂）隙均有径流产生。（2）地表径流中全氮和全钾流失量均随雨强增大而增大，全磷流失量则先增大后减小；地下径流中全氮流失量随雨强增大呈先增大后减小趋势，全钾流失量与雨强正相关，全磷流失量与雨强关系不明显。（3）雨强为30，50 mm ...
靳 丽 +4 more
doaj
Review of Policy Research, Volume 41, Issue 6, Page 985-1016, November 2024.Abstract Sustaining agricultural production in arid and semi‐arid regions is of paramount importance to food security, geo‐political independence, and social stability. In this context, it is vital to understand the effectiveness of policies. In this article, we aim to answer the question of what role the state and its policies play for soil protection
Andreas Thiel +3 more
wiley +1 more source
Veterinary Dermatology, Volume 35, Issue 5, Page 500-507, October 2024.Abstract Background Canine atopic dermatitis (cAD) is a hereditary, generally pruritic and predominantly T‐cell‐driven inflammatory skin disease, involving an interplay between skin barrier abnormalities, allergen sensitisation and microbial dysbiosis.
L. Widorn +2 more
wiley +1 more source
Shuitu Baochi Xuebao, 2021 自然条件下降雨多以间歇形式出现，而坡面土壤侵蚀又是一个渐变发育的复杂过程。通过3个雨强（60，90，120 mm/h）、5个坡度（5°，10°，15°，20°，25°）下的15场室内模拟降雨，研究一、二次降雨条件下不同雨强、坡度及降雨量对红壤坡面径流和侵蚀过程的影响，探讨间歇降雨条件下坡面侵蚀发育过程及其主要影响因素的变化。结果表明：（1）二次降雨的产流时间相比一次降雨均提前，一次降雨径流总量受到雨强、坡度和降雨量的共同影响，15°坡度是径流总量变化的一个转折点，二次降雨时降雨量的作用减弱 ...
李霞 +6 more
doaj
Integrative Conservation, Volume 3, Issue 3, Page 230-243, September 2024.Tropical secondary forest at early sucessional stage had higher diamter growth rate and mortality rate, however, these forests also are more risked to droughts and high temperatures. Rising temperatures and more frequent droughts may decrease the carbon sink capacity of tropical forest ecosystems. Abstract Tropical forests are major carbon sinks on the
Sai Tun Tun Oo +11 more
wiley +1 more source
Shuitu Baochi Xuebao, 2011 弃土场是开发建设项目中最重要的水土流失来源之一。以辽宁省沈阳市某电厂剥离表土临时堆土为对象,研究棕壤地区开发建项目设弃土的流失规律。试验在沈阳农业大学水利学院综合试验基地的人工模拟降雨试验大厅内进行,共设5个雨强、5个坡度,雨强分别为0.38,0.64,1.05,1.24,1.50 mm/min,坡度分别设定为20°,25°,30°,35°,40°。研究结果表明,相同条件下,雨强越大坡面产流时间越短,坡面土壤水分入渗率随雨强的增加而增加,且雨强越大坡面初始入渗率越高;径流量随雨强的增加而增加 ...
苏芳莉 +4 more
doaj
Integrative Conservation, Volume 3, Issue 2, Page 87-103, June 2024.Some extinctions can be prevented if impediments to protection of threatened species are overcome. Policies and practices have failed endangered species and biodiversity conservation is fraught with impediments such as rhetorical adoption, policy dismantling, circumvention of legislative obligations, and deliberate ignorance of scientific evidence ...
Noel Preece +2 more
wiley +1 more source
, 2007 为揭示土壤养分随径流流失的内在机制,采取地下供水方式使土壤入渗强度降低和人工降雨的方法,进行了雨强对土壤养分流失影响的试验研究。结果表明:供试土壤中养分的流失量随降雨强度的增大而增大,而在土壤内部养分迁移量很小;幂函数模型与指数函数模型相比 ...
王全九, 樊军, 孔刚
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