Results 21 to 30 of about 8,221 (164)

Ecological Studies on Mangrove Molluscs based on Typical Mangrove Communities [PDF]

open access: yes, 2013
本文基于典型红树植物群落,对中国大陆红树林软体动物的种类和数量组成 进行较长时间、连续和同步的多尺度定量和定性研究。于2007年4月至2010 年1月,选取海南(东寨港、文昌清澜港、万宁石梅湾)、广东(湛江特呈岛、 廉江高桥)、广西(防城港)和福建(九龙江口)13个有代表性的红树植物群落, 开展软体动物季节性定量和定性调查,其中海南东寨港、广东湛江特呈岛和廉江 高桥3个地点(共7个红树植物群落)的调查时间持续3年,其余地点除万宁石 梅湾(持续5个季度)外,均持续9个季度。此外 ...
刘毅
core  

Mistimed surveys lead to underestimated migratory bird impacts from wind farms

open access: yesJournal of Applied Ecology, Volume 63, Issue 4, April 2026.
Current guidance and approaches to surveying migratory birds at windfarm developments in Australia are insufficient. Evidence‐based alignment with seasonal presence is needed to improve biodiversity assessment standards, ensuring renewable energy expansion proceeds in a way that better safeguards migratory species and supports global biodiversity and ...
Xu Shi   +7 more
wiley   +1 more source

贺兰山西坡阿拉善黄鼠消化道形态的季节变化

open access: yes野生动物学报, 2018
为探讨阿拉善黄鼠(Spermophilus alaschanicus)的消化道特征对贺兰山荒漠环境的适应,对野生环境中阿拉善黄鼠消化道各项指标进行了测定。实验分别测定了不同季节胃、小肠、大肠、盲肠的长度、鲜重及净鲜重。结果表明阿拉善黄鼠消化道的总鲜重和总长度有显著季节差异,秋季较高,夏季次之,春季最低; 胃和盲肠鲜重以及盲肠净鲜重有显著季节差异,以秋季最重,春夏较轻; 小肠和盲肠的长度有显著季节差异,两者秋季最长,小肠夏季居中,春季最短,而盲肠春季居中,夏季最短 ...
王志勇 刘 鹏 燕永彬 滕丽微 高 惠孙玉姣 王继飞 刘振生
doaj  

Seasonal and intra-seasonal dynamics of sea surface pCO2 on the mid-shelf of the East China Sea: buoy-based time series observations [PDF]

open access: yes, 2015
近岸水体在全球海洋碳循环中扮演重要角色,但由于其地处海陆交界以及受人为活动的扰动,近岸水体的碳循环过程复杂且多变,这种复杂的变化过程也反映在海水二氧化碳分压(pCO2)随时间的剧烈波动上。鉴于近岸水体海表pCO2的时间变异性,特别需要长期高频的时间序列观测,以甄别其在不同时间尺度的变化规律和调控机制,并且为一些难以通过船载观测捕捉到的短期剧烈变化事件(如台风)提供研究的机会。 本研究主要基于浮标观测,该浮标观测点位于东海中部陆架(124.5°E31°N),水深约60m ...
吴瀛旭
core  

A Novel Topical Emollient Plus for Canine Atopic Dermatitis: A Clinical Trial Assessing Efficacy and User Acceptance

open access: yesVeterinary Dermatology, Volume 37, Issue 2, Page 293-305, April 2026.
Background: Canine atopic dermatitis (cAD) is a common, chronic skin condition characterised by epidermal barrier dysfunction, immune dysregulation and cutaneous dysbiosis. While “emollient plus” formulations are widely used in human atopic dermatitis, their role in cAD remains underexplored. Hypothesis/Objectives: To evaluate the clinical efficacy and
Beatriz Fernandes   +8 more
wiley   +1 more source

乐清湾湿地鸟类多样性特征及季节变动

open access: yes野生动物学报, 2017
在2015 ~2016年间,分四季调查了乐清湾湿地鸟类资源状况。共调查到鸟类195种,分属16目46科,其中春季11目34科114种9 998只,夏季14目37科98种5 449只,秋季15目42科112种6 569只,冬季11目35科119种7 552只,不同季节鸟类物种数和个体数量差异较大。从丰富度指数看,冬季最高(13.21),夏季最低(8.89)。从多样性指数看,春季最高(4.57),秋季最低(3.95)。从相似度指数看,春季和冬季之间最高(57.82%),春季与夏季之间最低(33.33 ...
孔 强 敖展雄 杨秋花 宫莉霞 鲁庆彬
doaj  

长江上游圆口铜鱼的食性分析 [PDF]

open access: yes, 2012
2010年春季(4—5月)、夏季(8月)和秋季(10月)在长江上游合江江段采用三层流刺网以3h为间隔昼夜24h连续采集圆口铜鱼样本,对其食物组成、昼夜摄食节律及季节摄食节律等进行分析和研究。结果显示圆口铜鱼的食谱较广,其食物种类包括软体动物、甲壳动物、鱼类、水生昆虫、寡毛类和植物碎片等,其中以淡水壳菜的相对优势度最高,说明圆口铜鱼是以肉食性为主的杂食性鱼类;平均饱满指数和平均充塞度的昼夜变化显示其昼夜摄食节律在春季表现为白昼型,而在夏季和秋季为晨昏型。摄食率随季节变化逐渐降低,春季摄食率最高,达93 ...
但胜国, 刘飞, 曹文宣, 王剑伟
core  

Efficacy of Der f 2/Zen 1‐LAMP1 Plasmid‐Based Vaccine Immunotherapy in Dogs With Atopic Dermatitis: A Proof‐of‐Concept Study

open access: yesVeterinary Dermatology, Volume 37, Issue 2, Page 306-318, April 2026.
Background: DNA‐based vaccination rapidly induces strong cellular and humoral immune responses, which may be enhanced by inclusion of lysosomal‐associated membrane protein‐1 (LAMP). Objectives: This proof‐of‐concept study evaluated the efficacy and safety of a Der f 2/Zen 1‐LAMP‐based DNA vaccine immunotherapy in client‐owned dogs with nonseasonal AD ...
Petra Bizikova   +6 more
wiley   +1 more source

Study on Nutrient Dynamics and Ecological Process in a Subtropical Reservoir [PDF]

open access: yes, 2016
由于梯级电站大量开发,河流湖库化和富营养化问题突出,但有关库区营养盐动态和生态过程缺乏系统性研究。本文以九龙江北溪西陂水库为研究对象,开展入库河流和水库的综合观测,从时、日、月、季节多个时间尺度捕捉营养盐和生态参数的变化,分析水库营养盐和浮游植物的季节转换模式、暴雨事件生态响应过程和机制,总结季风气候条件下亚热带不同水库营养盐和生态特征。主要研究结论如下: (1)西陂水库营养盐在干湿季节过渡期,NH4-N、DRP的相对富集和水温升高导致叶绿素a出现峰值。水库汇水与水面面积比值高达7285 ...
莫琼利
core  

Life Stage‐Specific Genetic Diversity and Landscape Characteristics Collectively Influence Genetic Recovery in Pometia pinnata Population 生活史阶段特异的遗传多样性与景观特征对番龙眼种群遗传恢复的协同影响

open access: yesIntegrative Conservation, Volume 5, Issue 1, Page 137-149, March 2026.
Pometia pinnata demonstrated life‐stage‐specific genetic responses to landscape features, with asymmetric gene flow patterns and population recovery following historical bottlenecks, revealing complex topographic and demographic influences on forest genetic structure.
Madhuparna Chatterjee   +5 more
wiley   +1 more source

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