Results 31 to 40 of about 1,026,937 (161)
通过野外调查和对2000年TM影像的解译,分析了研究区土地沙漠化的分布格局与发展态势,以及土地沙漠化造成的负面影响。从气候因子的时空分布与变化和人地关系两大方面,探讨了研究区土地沙漠化发生、发展的原因。结果表明,沙漠化土地在空间分布上,与春季风蚀气候因子分布范围不一致;沙漠化在发展的速率上,与三大气候因子的动态变化不一致。结论指出:近50年来,气候因子的时空变化不是研究区土地沙漠化的主要原因;人畜压力与环境容量严重失衡,研究区人地关系的管理上屡有失误,落后的生产、生活方式转变缓慢 ...
刘树林 王涛
doaj +2 more sources
The underappreciated roles of fog and dew on vegetation and biocrusts
Summary Fog and dew represent minor components of ecosystem water budgets in most ecosystems. However, fog and dew can play an essential role in ecosystem dynamics and are particularly important for water‐limited systems. In addition to serving as direct water inputs, fog and dew can influence microclimate and water redistribution, thereby promoting ...
Lixin Wang, Yue Li, Mengyun Sun, Na Qiao
wiley +1 more source
Tracking with GPS and accelerometers shows that great evening bats in subtropical China use two overwintering strategies: some remain in continuous hibernation, while others switch between torpor and activity as temperatures change. This behavioral flexibility, shaped by climate, underscores the importance of protecting diverse roosting habitats for ...
Zhiqiang Wang +7 more
wiley +1 more source
目的土地利用是人类活动影响气候变化的重要路径,探究土地利用变化对区域气候的影响机理与效应是全球可持续发展调控的关键科学问题。方法基于RegCM 4.7区域气候模型,输出分辨率为50 km,模拟2009—2018年中国地区土地利用变化背景下的区域气候演变过程,并从地表热量平衡和低层环流场探讨气温和降水的变化机理。结果1)研究区土地利用变化对气温影响更为显著;2)不同土地类型变化的气候效应不同,农用地转为林地后引起夏季气温的升高和降水增加,而林地转为农用地则引起降温,农用地转为建设用地引起气温升高 ...
胡嫚莉, 赵子龙, 李鑫
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Read the free Plain Language Summary for this article on the Journal blog. Abstract Ecological communities are stressed by rapid and complex anthropogenic changes, threatening the persistence of biotic interactions and ecosystem functioning. Plant–pollinator communities, for instance, undergo structural transformations as a result of land‐use change ...
Erliang Gao +8 more
wiley +1 more source
天气变化对人们身体健康的影响已被人们关注。我省地区处中纬度西风带,冷暖空气活动频繁,气象要素变异梯度大,对人们身体健康的影响很大。尿路感染是最常见的疾病,在气候变化后容易发生,尤其是女性病人。本文就气候变化对尿路感染的影响进行分析 ...
李巧玲 +4 more
doaj
A link between increased temperature and avian body condition in a logged tropical forest
Abstract The combined effects of anthropogenic disturbances, such as logging and climate change, remain poorly understood; yet, they are the main threats to tropical biodiversity. Most tropical African countries lack long‐term climate data, so climate impacts on biodiversity cannot be assessed.
Moreen Uwimbabazi +7 more
wiley +1 more source
利用洮河流域气象观测资料和水资源定位观测资料,分析气候变化特征、水资源变化特征及其二者的关系,建立水资源气候模式。分析表明:洮河流域降水量年际变化呈下降趋势,降水量变化曲线线性拟合倾向率在-14.5~-4.6 mm/10 a之间,降水量递减以夏季降水量递减为主。气温年际变化趋势呈显著上升趋势,气温变化曲线线性拟合倾向率在0.12~0.59℃/10 a之间,增温率以冬季最大,年际变化趋势从20世纪70年代之后持续上升。年干燥指数变化呈显著上升趋势,年干燥指数变化曲线线性拟合倾向率在0.05~0.12/10
姚玉璧 +3 more
doaj
植被覆盖是旱区生态环境状况的重要表征和直接反馈。气候变化和人类活动干扰加剧的背景下,亟需明确植被覆盖的变化状况和归因,但当前研究缺乏对各驱动因子贡献率的量化。为此,选取新疆玛纳斯河流域为研究区域,基于1982—2015年NDVI和气候数据,在分析植被时空变化格局的基础上,量化了气候变化和人类活动的贡献率。1982—2015年,流域年均NDVI值呈东高西低、北高南低的空间分布格局。34年间NDVI呈显著上升趋势(+0.60%/10 a),但存在年际变异;1995年发生突变,1982 ...
白旭阳 +5 more
doaj
Representation of obligate groundwater‐dwelling copepod diversity in European protected areas
Abstract Groundwaters sustain diverse surface ecosystems and are populated by metazoan species, mostly invertebrates, that provide fundamental ecological functions and are often of prominent conservation value due to narrow endemism and high phylogenetic rarity.
Francesco Cerasoli +7 more
wiley +1 more source

