Results 11 to 20 of about 11,737 (164)
Zhejiang Daxue xuebao. Lixue ban, 2019 闪电事件时空变化研究对于防灾减灾和资源利用具有重要意义。采用2 481 个站点的闪电日数数据诊断 1961—2016 年我国闪电事件的时空演变特征。结果表明：在时间上，1961—2016 年我国年均单站闪电日数整体呈减少趋势，西北西部和西藏地区年均单站闪电日数呈分段变化特征。全国、东北、北方、西北东部和东南地区年均单站闪电日数大致呈2~4 a 的周期变化。西北西部、西藏和西南地区分别呈2，4 和6 a，3 和8 a 与2~6 a 的显著周期变化。年均单站闪电日数突变集中发生在20 世纪80 年代末至90
KONGFeng(孔锋) +4 more
doaj +1 more source
Spatial and temporal variations of river water and sea-ice melted water in the western Arctic Ocean [PDF]
, 2015 北冰洋淡水组分的结构及其时空变化不仅显著影响北冰洋的生态系，而且对全球深海热盐环流和全球气候变化起着重要作用。本研究以白令海峡、楚科奇海陆架区和加拿大海盆等3个区域为研究对象，利用中国第1、2、3、4、5次北极科学考察在西北冰洋获得的海水δ18O数据，结合美国国家航空航天局发布的北冰洋δ18O数据，借助海水δ18O和盐度的质量平衡，定量研究淡水组分中河水和海冰融化水的贡献，揭示不同来源淡水组分在白令海峡、楚科奇海域及加拿大海盆的分布特征 ...
潘红
core
Characteristics of macrobenthic communities in the estuary of Dagujia River and its adjacent water areas in Yantai, Shandong [PDF]
, 2016 为了解烟台大沽夹河河口及邻近海域大型底栖动物群落特征及受干扰情况,于2012年9月在上述区域设置12个采样点进行大型底栖动物群落调查和分析。对采集的生物样品进行物种鉴定、计数和称重,利用生物统计软件PRIMER计算优势度指数(Y)、Shannon-Wiener多样性指数(H')、Margalef丰富度指数(D)和Pielou均匀度指数(J),并进行等级聚类(CLUSTER)、非度量多维标度排序(non-metric multi-dimensional scaling,MDS)及丰度/生物量曲线 ...
周政权 +4 more
core +1 more source
Spatial and Temporal Changes and Prediction of Habitat Quality in Key Ecological Function Area of Hu'nan Province [PDF]
, 2022 [Objective] Land use change and habitat quality in Nanyue key ecological function area of Hu'nan Province were studied to reveal the relationship between forest land reduction and habitat quality caused by human activities, in order to promote the ...
Deng Chuxiong +5 more
core +1 more source
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Plant phenology is crucial for understanding plant growth and climate feedback. It affects canopy structure, surface albedo, and carbon and water fluxes. While the influence of environmental factors on phenology is well‐documented, the role of plant intrinsic factors ...
Yunpeng Luo +8 more
wiley +1 more source
Spatial and temporal distribution of microphytobenthic composition and primary production and their controlling factors in subtropical intertidal areas [PDF]
, 2016 作为近岸潮间带中最主要的初级生产者，底栖微藻是滩涂初级生产力的主要贡献者。对底栖微藻初级生产力及其调控机制的研究，主要集中于中纬度温带地区，而对亚热带生态系统的研究则较少。本论文针对“亚热带潮间带底栖微藻初级生产力及其调控因子”这一科学问题，于2014年5月至2016年3月，分别于厦门湾、漳江河口区及漳江口红树林保护区，应用显微镜、高效液相色谱及红外气体分析仪，研究了潮间带不同类型的光滩底栖微藻种类组成、光合色素组成及初级生产力的时空分布特征，同时探讨了影响底栖微藻群落组成和初级生产力分布变化的环境因子，
王源勇
core
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Decomposition is the transformation of dead organic matter into its inorganic constituents. In most biomes, decomposition rates can be accurately predicted with simple mathematical models, but these models have long under‐predicted decomposition in globally extensive ...
Heather L. Throop +8 more
wiley +1 more source
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Organic phosphorus mineralization is a critical process in the phosphorus cycle, governing phosphorus bioavailability for plants. The PhoD gene, which encodes the key enzyme alkaline phosphatase, serves as a valuable biomarker for this process.
Sandhya Mishra +3 more
wiley +1 more source
Temporal and Spatial Characteristics of Soil Erosion in Typical Counties of Black Soil Region Based on RUSLE [PDF]
, 2023 [Objective] The spatiotemporal characteristics of soil erosion were analyzed in order to provide a reference for soil erosion control and evaluation of soil and water conservation benefits.
Fu Bin +6 more
core +1 more source
Strengthening community‐based fisheries monitoring programs with Indigenous perspectives
Conservation Biology, EarlyView.Abstract Community‐based monitoring (CBM) programs are increasingly recognized as essential for adaptive environmental stewardship. Yet, the CBM literature often highlights successful cases and privileges evaluations by external experts over those of community members themselves.
Kanwaljeet Dewan +2 more
wiley +1 more source