生态种的

1Niche construction can lead to stable coexistence of diverse genotypes in spatially structured population, which supports a stable polymorphism even without heterozygote superiority.(2)With habitat deterioration, niche construction accelerates the formation of steady polymorphism and hence impedes the harmful influences of environment on the population, which might embody a life-history strategy of organism under the unfavorable environment.(3)Niche construction results in the coexistence with alternative polymorphism through genotype-environment feedback and limited gene flow.(4)The niche-constructing organism is an active force to alter its environment and hence the direction of natural selection in order to better survival.(5)Spatial dynamics and distribution pattern of metapopulation are profoundly influenced by time-lagged niche construction.(6)Metapopulation size can reach a fixed level in the recency effect and equal weighting of time lag but is statistical stability in primacy effect, which implies the primacy effect is most remarkable.(7)The increment in the relative weightingof each generation\' niche construction and the length of time lag are significant factors for system destabilization.(8)Moderate capacity of positive niche construction benefits the metapopulation persistence.(9)The narrowing of niche breadth can decrease the metapopulation size and thereby increase the extinction risk.(10)The coupled function of time lag and niche construction make the system oscillation and generate the spiral wave, spiral-broken and circular wave in heterogeneous habitat.The spatial distributions of metapopulation and resource content are complementary due to a phase lag of their both frequencies.(12)Metapopulation persistence with niche construction depends not only on the balance between colonization and extinction, but also on the balance between the ability of niche construction and natural dissipation of habitat.(13)Metapopula-tion can survive under certain condition when the percent of suitable patches in habitat is lower than the ration of extinction to colonization.(14)Two thresholds exist in the process of transition of habitat quality dynamics from unsuitable to suitable, which include the intensity of niche construction and the initial condition of system.(15)Metapopulation size is positive correlated with the ability of positive niche construction, which means that organism or population who has strongly positive influences on their environment plays an important role to maintain the available habitat.

通过上述几个方面的研究，主要得出以下15条结论：(1)生态位构建可使空间结构种群，甚至是在没有杂合子优势的条件下，形成多种可能的稳定基因型分布模式；(2)随着环境的破坏与恶化，种群的生态位构建作用加速其较早形成稳定多态以阻碍环境对种群的不利影响，解释了有机体在不利环境下的一种生活史对策；(3)生态位构建作用通过基因型—环境反馈机制及有限的基因交流导致基因型多态的稳定共存；(4)有机体的生态位构建作用是一种积极的动力改变环境进而改变其自然选择的方向；(5)生态位构建的时滞作用对集合种群动态和空间分布产生深刻影响；(6)集合种群大小在时滞的崭新效应和等权重效应下达到一固定值，而在首位效应下达到统计稳定，表明首位效应的影响最显著；(7)首位效应下生态位构建相对权重的增量和时滞的长度是影响系统不稳定性动态的关键因素；(8)适中的生态位构建强度有利于集合种群的续存；(9)生态位宽度变窄会减少集合种群的数量从而增加其灭绝风险；(10)时滞和生态位构建的双重作用使系统产生周期振荡，并在异质性环境中产生稳定的螺旋波，破碎的螺旋波和环形波三种分布模式；(11)集合种群与资源含量的空间分布因为相滞而互补；(12)具有生态位构建的集合种群续存不仅取决于侵占率与灭绝率之间的平衡，而且依赖于生态位构建能力同其生境的自然消耗速率之间的妥协；(13)当生境中适合侵占的斑块比例小于其侵占率与灭绝率之比时，生态位构建作用促使集合种群在一定条件下续存：(14)生境斑块的状态从不适合到适合转变过程中存在生态位构建强度和系统初始条件这两个阈值；(15)集合种群的大小同正生态位构建能力正相关，意味着对环境具有较强正作用的有机体对维持有效生境起积极作用。

Plant of the orchid family because commercial value is high and those who cause hill civilian and lover is excessive collect with manage, the one; that makes the main reason that orchid species is in severe danger on the other hand, because factitious development is a mountainous area, if give birth to the fell trees of selva to wait formerly, the destruction that causes zoology environment; is belonged to plus plant of the orchid family, planted distributinging belt is narrow, reach its oneself is progenitive and not easy, to living the environment asks to compare other plant slashing, make it becomes world biology to protect one of centers that organize an attention.

兰科植物由于商业价值高而引起山民和爱好者的过度采集与经营，成为兰花物种濒危的主要原因之一；另一方面，由于人为的开发山区，如原生热带雨林的砍伐等，引起生态环境的破坏；再加上兰科植物属、种的分布带狭窄，及其自身繁殖不易，对生存环境要求比其他植物苛刻，就使它成为世界生物保护组织注重的中心之一。

The "letters and visits" system germing in the revolutionary base areas which was created by the CCP during the new democratic revolution was a manifestation of the ruling party\'s mass line. The establishment of new state power, the transformation of the CCP from a revolutionary party into a state-charged party means that the political environment has changed, and the state logic began running in the relationship between the party and people.

中华人民共和国的建立，不仅意味着中国共产党从革命的政党转化为执掌国家政权的党，而且意味着政治生态不可逆转的转换：一方面，政党的精神植入国家的肌体，赋予国家一种现代性的精神：另一方面，国家的逻辑开始运行并嵌入党民关系之中。

In this paper, preservation characteristics of the viviparous propagule of Kandelia candel and Aegiceras corniculatum, change of nutrient content and caloric values of several mangroves species during winter, cold resistance and salt resistance and the effects of supplemental calcium on the seedling of three mangrove species were studied, the main results showed as follows

本文进行了红树植物对低温和盐度的某些适应生理生态学研究，主要讨论胎生繁殖体的贮藏特性、不同盐度和低温下生理生态指标的变化和补充钙的效应，以及这些处理下，植物体中6种元素和热量的变动特性等。

The traceless education is based on understanding of the human personality, and focuses on students with social and psychological needs.

无痕教育是基于对人的个性认识，重点考虑学生社会需求与心理需求的教育，是一种生态化的、适应当下中学生心理特点的有效教育方式。

This article elaborated Dingxi in the pea root rot research and the disease- resistant breeding progress,introduced the Gansu middle area pea root rot s main pathogenic bacteria is the root-rot syndrome which the eggplant fusariumFusarium solani(Mars Sacc,the pea silk pouch mildew and so on eight kind of cause of disease fungi compound invade dye cause.

论述了定西在豌豆根腐病研究及抗病育种的进展，介绍了甘肃中部地区豌豆根腐病的主要致病菌是茄镰刀菌Fusarium solani(MarsSacc、豌豆丝囊霉等8种病原真菌复合侵染引起的根腐综合症；通过选育抗根腐病品种是解决问题最经济有效环保的措施，先后培育出了不同生态类型的豌豆品种定豌1号到定豌5号，基本解决了生产中因根腐病导致的减产、绝收现象，这些品种在甘肃中部、宁夏南部的旱地农业生产中发挥了重要作用。

This project lies on the willow leaf lake beautiful of Changde of Hunan Province in the district for holidays, orientate as the five-star hotels for holidays of ecotype, there are natural position advantage and beautiful natural environment on the lake of the willow leaf, the green water is and monochromatic on long day, green hill and ancient city set each other off, the designer hopes to express one such style, inlay extremely modern a recreation hotel in the view on the spot full of vitality, this has determined the theme of indoor design of hotels - modern space of hotel and combination of ecological culture of recreation too.

此项目位于湖南省常德市美丽的柳叶湖渡假区内，是定位于五星级的生态型渡假酒店，柳叶湖有着天然的区位优势和优美的自然环境，碧水与长天一色，青山与古城相映，设计师希望表达这样一种风格，把极现代的一座休闲酒店镶嵌于充满生机的实地景观中，这也决定了酒店室内设计的主旋律—现代的酒店空间与休闲生态文化的结合。

This study examines the criteria of water temperature for black carp, grass carp,silver carp, bighead, common carp, etc in the condition of thermal shock.The paper reported the optimum growth temperatures,the maximum lethal temperatures and the short exposure maximum high temperatllres for these fishes.All the criteria can be considered as appraisal values of water temperature for thegrowth and breeding of these fishes.

为保护水域生态环境的平衡，合理利用水资源和为制定发电厂热水排放的温度标准，提供有关水生生物的温度基准值，对青鱼、草鱼、鲢、鳙和鲤等七种主要淡水经济鱼类作了温度基准值的研究，提出了最适生长温度，最大致死温度及短期暴露最大高温等基准值，以作为确保水生生物能正常生长与繁殖情况下，环境温度的评价标准。

In a word, most agronomic traits of Zhonghuang13 had insensitivity and stability to photoperiod, and Zhonghuang13 was extensive photoperiod adaptability soybean which could be planted at the area of multi-ecotype.To make photoperiod especially importance of long-day for growth and development of short-day crops clear, In the current study, a photoperiod-sensitive and late maturity determinate soybean cv.

总的来说，中黄13相对于中黄24和凤交66-12在多数的农艺性状上表现出一定的稳定性，对光周期反应相对钝感，进一步证实了中黄13是一种感光性相对弱的钝感型品种，可适应多种生态类型的地区种植。

Through the reverse transformation of dog and wolf, the two novels exhibit the two contrary results: Buck's return to nature is to challenge human civilization, indicating that the anthropocentrism dissolves while White Fang's going back to society is to reward the ecological justice of human being.

两部小说通过狗狼的反向流变展现了不同的人与自然关系所产生的两种截然相反的结果：巴克野性的回归是对人类文明的挑战，预示着&人类中心主义&的解体；而白牙野性的感化是对人类生态正义的回报。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。