Results 131 to 140 of about 17,222 (205)
, 2000 萼花臂尾轮虫（Ｂｒａｃｈｉｏｎｕｓ ｃａｌｙｃｉｆｌｏｒｕｓ Ｐａｌｌａｓ）休眠卵在不同萌发条件下累积萌发率的结果显示：保存在休眠卵形成的原液中，温度为２０℃－３０℃时萌发率均较高，３０℃时用过滤湖水萌发时的萌发率最高（６５％）；保存在无机培养液中的休眠卵，用曝气自来水萌发时最高，用湖水次之，无机液萌发效果较差２０℃和２５℃时三种萌发液中的萌发率接近；母体投喂小球藻形成的休眠卵的累积萌发率高于投喂混合藻组，且以过滤湖水为孵化液时效果较佳；累积萌发率与光照时间的长短并无直接关系（Ｐ＞０．０５ ...
杨家新,黄祥飞
core
Policy Studies Journal, EarlyView.ABSTRACT The social construction of target populations (SCTP) framework emphasizes the ways in which target populations' levels of political power and deservingness shape the allocation of policy benefits, but less attention has been devoted to the conditions under which the same target population may be considered deserving in one policy context but ...
Elizabeth Bell +3 more
wiley +1 more source
Ecological Studies of Marine Virus and its Viral Lysate [PDF]
, 2015 病毒是海洋生态系统中数量最多、多样性最为丰富的一类生命形式，具有极为重要的生态地位。为了深入认识海洋浮游病毒及其裂解浮游细菌释放的裂解产物的生态效应，本论文首先研究了西太平洋典型寡营养海区的浮游病毒对浮游细菌的致死效应；接着研究病毒裂解产物如何在不同营养水平（寡营养和富营养）特征的海洋水体中影响浮游细菌的生长、群落组成等生态特性。此外，本论文以海洋生态系统中一类生态地位非常重要的浮游细菌-玫瑰杆菌（Roseobacter）为研究对象，对其裂解性病毒进行了分离纯化和鉴定 ...
纪建达
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The Inclusion Trade‐Off: Comparing the Design and Functionality of Collaborative Governance Forums
Policy Studies Journal, EarlyView.ABSTRACT Environmental challenges require collaboration across jurisdictions, often through forums or intermediary spaces for repeated interaction. A persistent forum design question concerns inclusion criteria, or which actors should be included.
Adam Wiechman +3 more
wiley +1 more source
Unpacking Welfare Deservingness Theory: Evidence From the Perceived Deservingness of Gig Workers
Policy Studies Journal, EarlyView.ABSTRACT The theory of welfare deservingness provides valuable insights into the social legitimacy of welfare programs and the principles underlying policy design. In examining the question of who deserves what and why, established deservingness criteria emphasize that individuals demonstrating motivation to work (“reciprocity”) are typically perceived
Juhyun Bae
wiley +1 more source
野生动物学报, 2014 由于人类活动、自然气候变化、动物自身等因素,导致中国特有的野生麋鹿种群于19世纪初叶在本土上灭绝。20世纪90年代,通过人类的保护活动,开始将麋鹿在原生地恢复野生种群。野生麋鹿走过了引种扩群、半散养行为再塑、放归自然3个阶段。经过14 a的艰辛努力,人们有计划地实施麋鹿野生放归和自由走出围栏形成野生种群,取得了较好的业绩。目前,中国已拥有大丰野生麋鹿群、石首野生麋鹿群、洞庭湖野生麋鹿群3大野生种群,麋鹿在野外经历了3个繁殖周期,野生麋鹿子三代(F3)已变为现实。截至2012年 ...
丁玉华 任义军 温华军 李鹏飞 高大立 常 青
doaj
恩斯特·迈尔是20世纪著名的生物学家,也是罕有的一位对生物学及其相关领域有着深入而全面了解的科学思想大师。他曾在鸟类学、系统分类学、进化生物学以及生物学史学和生物学哲学等许多方面做出巨大贡献,包括发现诸多新物种以及提出生物学物种概念;并在1930-1940年代的进化论综合进程中担任主要设计者 ...
程路明
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ABCA12 Frameshift Deletion in Domestic Cats With Ichthyosis Fetalis
Veterinary Dermatology, EarlyView.ABSTRACT Background Ichthyosis fetalis (IF), also known as harlequin ichthyosis, is a rare and often fatal autosomal recessive congenital skin disorder. It is characterized by thickened, hard skin plaques and deep skin fissures that limit mobility and cause malformations of the eyes, lips and ears.
Jeanna M. Blake +2 more
wiley +1 more source
Genomic responses to increased temperature and pollinator selection in Brassica rapa L.
New Phytologist, Volume 250, Issue 2, Page 1231-1247, April 2026.Summary Rapid environmental change reshapes both abiotic stress and biotic interactions, yet it remains unclear how these combined forces structure plants' genomic adaptation. In particular, the joint influence of temperature and pollinator identity, two ecological axes undergoing simultaneous global shifts, has rarely been quantified at genomic ...
Yanqian Ding, Florian P. Schiestl
wiley +1 more source