Results 11 to 20 of about 1,483,665 (111)
Shuitu Baochi Xuebao, 2023 为探究河套灌区沈乌灌域在深度节水改造前后地下水环境的演变规律,针对地下水埋深、矿化度以及二者关系,通过区域布井、定位长期监测方式,采用经典地统计学理论,分析地下水埋深和矿化度的时空变化规律。结果表明:(1)深度节水改造后,沈乌灌域地下水埋深呈增大趋势,平均地下水埋深由节水改造前1.83 m增大到节水改造后3.36 m,增长率为83.9%。灌域中心和南部埋深偏大,局部产生漏斗,最大埋深至9.37 m,灌域北部埋深变化为0.6 m以下。(2)节水改造工程实施,使地下水矿化度显著增高,由节水改造前的1 296
杨舒雅 +7 more
doaj
Shuitu Baochi Xuebao, 2021 地表水和地下水是水资源主要组成部分，研究干旱区地表水和地下水相互转化过程，对水资源的合理开发利用与评价具有重要的理论意义。选取艾比湖流域地表水和地下水为研究对象，分析其稳定同位素组成特征和分布规律，探讨不同水体间补给关系。结果表明：（1）艾比湖流域大气降水δ2H和δ18O表现出显著的季节变化特征，全年表现为冬季贫化夏季富集的现象。（2）湖水δ2H和δ18O值明显高于河水，反映湖水强烈的蒸发浓缩作用。博尔塔拉河和精河水的δ2H和δ18O值从上游到下游总体趋于富集，在山区、绿洲和平原表现出不同的同位素组成 ...
郝帅 +5 more
doaj
Shuitu Baochi Xuebao, 2021 研究干旱缺水地区地下水位（埋深）时空动态特征及对土地利用变化的响应，对于加强农业地区土地利用和地下水资源管理具有重要意义。以呼图壁县平原灌区为研究区，基于地统计学和GIS结合技术，应用普通克里金插值拟合研究区2000年、2010年及2018年地下水埋深时空分布，并且利用同期遥感数据解译生成了土地利用类型图，叠加分析不同时期地下水埋深变化与对应时期的土地利用类型转移之间的响应关系。结果表明：呼图壁县地下水埋深的空间变化主要是由地形地貌、气候等结构性自然因素引起的，空间相关性逐年增强，空间异质性逐渐减弱 ...
胡鑫 +4 more
doaj
Wildlife Letters, EarlyView.Climate change drives shifts in suitable habitats for Eurasian lynx and its prey (hare, roe deer) in Mohe, Daxing'anling Mountains. Under RCP scenarios, moderate warming (RCP4.5) promotes substantial habitat expansion, while high‐emission conditions (RCP8.5) lead to strong expansion in the 2050s but slower gains and partial contraction by the 2070s ...
Binglian Liu +5 more
wiley +1 more source
Wildlife Letters, EarlyView.Using radiotelemetry, we found that the movement and home range of the endangered Sacalia bealei varied significantly across reproductive classes and seasons, with males exhibiting greater movement than females during wet and mating seasons. The species exhibits strong aquatic dependence, favoring deep pools interspaced among riffle‐pool sequences ...
Wing Sing Chan +3 more
wiley +1 more source
Shuitu Baochi Xuebao, 2021 干旱荒漠地区地下水补给是地表植被水分消耗的主要补给源，地下水埋深与植被指数（NDVI）关系密切。针对植被指数与地下水埋深响应关系研究的不足，分析了基于河套灌区解放闸灌域植被指数（NDVI）与地下水埋深（H）的定量关系。采用2016年3—9月的10个时相的landsat8遥感影像数据与同时期的57眼地下水埋深观测数据，经NDVI遥感提取与地下水埋深（H）的地统计分析，建立NDVI与H的时空相关关系，并做显著性检验与密切程度的划分，进一步分析不同地下水埋深分区下H与NDVI的关系。结果表明 ...
郑倩 +6 more
doaj
Zhejiang Daxue xuebao. Lixue ban, 2003 油气的运移、聚集与地下水动力场的形成与演化密切相关.随着沉积盆地的形成与演化,地下水动力场也有形成、发展和消亡的过程.讨论鄂尔多斯盆地地下水动力场的形成与演化,推断其油气的分布规律:大气水下渗——向心流处为水区,天然气离心流区为气区,越流天然气漏失区对应于气水共存过渡区.
JINAi-min(金爱民) +5 more
doaj +1 more source
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Flowers with deep corollas are frequently associated with nectar robbing, a behaviour that often reduces pollen transfer and seed production. Robbing scars, however, may further affect plant reproductive success through rainwater entry into corolla tubes.
Wu Sun +6 more
wiley +1 more source
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Oxygen supply capacity (α) is a physiological trait hypothesized to shape the metabolic niche and biogeography of aquatic breathers, yet how natural selection targets α remains unclear.
Na Zhang +6 more
wiley +1 more source
Herbivory enhances cadmium foraging in the invasive hyperaccumulating plant Phytolacca americana
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Biological invasions and heavy metal pollution are two pervasive environmental challenges threatening global ecosystems. While the elemental defence hypothesis posits that certain plants accumulate heavy metals to deter herbivores, it remains unclear whether invasive ...
Jingge Kuang +5 more
wiley +1 more source