Results 11 to 20 of about 16,001 (188)
Floristic analysis of the seed plants from Yandang Mountain of Yueqing, Zhejiang(浙江乐清雁荡山种子植物区系分析)
Zhejiang Daxue xuebao. Lixue ban, 2018 在文献查阅、野外调查和标本鉴定的基础上，对浙江乐清雁荡山种子植物区系特征进行了统计分析，得到：(1)区域内共有野生种子植物732种（含种下类群），隶属147科、433属；科、属水平显示出多样性，含1个种的科和属分别占总科数和总属数的41.5%和67.9%. (2)科的分布区类型中，热带成分有64科，占总科数的42.9%，温带成分共36科，占24.6%；属的分布区类型中，热带成分和温带地理成分分别占总属数的49.1% 和50.9%，泛热带分布及其变型所占比例最大，为24.1%.
CHENWeijie(陈伟杰) +3 more
doaj +1 more source
Haiyang yu huzhao赤潮暴发不仅会导致水体中积聚过量微藻细胞，还常常伴随出现氮磷等富营养化污染因子超标的问题。随着生态环境治理要求的提升，有害赤潮治理不仅需要高效除藻来控制灾害，还需要同时净化水体中的其他污染物质，对受污染水环境进行综合治理。该研究面向有害赤潮综合治理需求，以现有改性粘土法为基础，探究了在粘土中引入尿素合铁材料制备功能性赤潮治理材料的方法可行性，实验测试了新制备尿素合铁改性粘土(ferric carbamide complex-modified clay, FMC)的除藻降磷效果 ...
张 博闻 +4 more
doaj +1 more source
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
He jishu海产品中的210Po是人体内照射剂量的主要来源，准确测定海洋生物中210Po的比活度尤为重要。本文建立了海洋生物中210Po的压力罐消解-α能谱检测方法。该方法以209Po为产额示踪剂，海洋生物样品经压力罐消解处理后，在盐酸体系中用镍片自沉积方法分离210Po，使用α能谱仪进行测量。在本方法测定条件下，标准物质的测定结果与标准值一致，相对标准偏差为9.0%，全程放化回收率为92.9%~98.6%，方法检出限为0.18 Bq·kg-1。该方法操作简便高效、环境友好、回收率高且测定结果准确可靠 ...
林 静 +3 more
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Noteworthy plants of Carex Linn. (Cyperaceae) from China(中国薹草属（莎草科）植物资料增补)
Zhejiang Daxue xuebao. Lixue ban, 2011 报道了作者在查阅、整理和鉴定法国巴黎自然历史博物馆显花植物标本馆中采自中国的薹草属Carex标本时，发现的9个新异名.其中C. schkuhriana归并于C. dimorpholepis，C. sinomairei归并于C. fedia，C. trappistarum归并于C. heterolepis，C. paucimascula和C. neokukenthaliana归并于C. lanceolata，C. dunniana归并于C. ligulata，C.
ZHAOYin-jia(赵银佳) +4 more
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Study on the seasonal dynamics of small mammals in Jinhua City(金华城区小型兽类数量季节消长的研究)
Zhejiang Daxue xuebao. Lixue ban, 2002 自1997年1月至1999年12月,选择金华城区的居民区、宾馆、粮库和工厂等4种生境5个调查点,每月以夹夜法对小型兽类数量的季节消长进行研究.结果表明,金华城区褐家鼠(Rattus norvegicus)的捕获率为0.58%、黑线姬鼠(Apodemus agrarius)0.26%、臭鼩鼱(Suncus murinus)0.24%、黄胸鼠(Rattus flavipectus)0.12%、小家鼠(Mus musculus)0.05%;捕获率的季节消长呈现以6月和9月为高峰的双峰型曲线 ...
BAOYi-xin(鲍毅新) +3 more
doaj +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
Haiyang yu huzhao安氏新银鱼是我国重要的小型经济鱼类物种，具有较高的经济价值。但目前缺乏一种快速、经济有效的性别鉴定方法，极大地阻碍了其性别决定分子机制、性染色体演化历程的研究和水产育种与养殖技术方面的生产实践。本研究通过比较安氏新银鱼雌性与雄性的全基因组重测序数据，发现雌雄之间存在一个显著差异的基因组区域(chr02: 2 798 574~5 434 239 bp)。基于测序深度差异分析筛选得到3个雌性特异性片段，长度分别为10 bp、167 bp和53 bp。在长为167 bp的雌性特异性位点附近设计引物 ...
王 心悦 +4 more
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Wildlife Letters, EarlyView.Human‐caused leopard deaths in Sri Lanka averaged 9.65 ± 4.5 records year−1 over 17 years (2008–2024; n = 164), with records highly clustered in the central highland mosaic ecosystem. Mortality was dominated by adult males and driven primarily by snaring in plantation landscapes, and indicating an increase approximately 0.7–0.8 deaths per year.
Sanjaya Weerakkody +11 more
wiley +1 more source
Wildlife Letters, EarlyView.We used spatially explicit capture‐recapture to estimate jaguar densities in a private reserve in the Colombian Llanos and quantified land cover change in and around the reserve from 2014 to 2024. Densities increased 22% since 2014, while disturbed land cover increased by 39%–54% around the reserve depending on buffer distance. Our study indicates that
Valeria Boron +7 more
wiley +1 more source