种群动态

• Monitoring the whole avifauna ( community ) both in breeding season and non - breeding season . individual and population are good indicators of environment pollution , and there are still some questions about the guild monitoring and community monitoring . finally , we surveyed bird species and relative abundance in three areas of the upper reaches of minjiang river during both summer and autumn
  普遍意义上的用鸟类监测环境主要包括： 1监测某一种的繁殖期和非繁殖期(冬季)种群； 2监测不同种的种群动态； 3监测整个鸟类区系的种群动态和群落动态，也就是( 1 )种群及个体； ( 2 )种团； ( 3 )群落三个层次。
• The minshan mountains black bears " population viability analysis ( pva ) has been carried out . the vertex software is used to simulate on population dynamics with the kind without inbreeding and inbreeding cause death same price coefficient is 3 . 14 , food poor harvest and human - caught as disaster change factors based on the already various parameters collected
  在已收集的各项参数和环境资料的基础上，以岷山山系内各县所辖区域作为研究区域，运用vertex软件，对没有近亲繁殖和近亲繁殖致死等价系数为3 . 14 、食物欠收和人类诱捕为灾变因子等影响下的种群动态进行了模拟。
• Changes in the existence , physiological and ecological characters and genetic diversity of harmful algae bloom species are the internal reason that can intrigue harmful algae blooms . the research on biological diversity , geological distribution and physiological characters of hab species , along with study on the roles and effects of changes in their population dynamics , their ecological adaptive and competitive strategies in the process of hab will be helpful in comprehension and explanation to the ecological mechanism of hab construction
  有害赤潮生物的存在、其生理生态特点及物种和遗传多样性变化，是引发有害赤潮的内因，研究赤潮生物多样性、地理分布和生理特征，探明重要有害赤潮种群动态变化、生态适应和竞争策略在爆发赤潮过程中的地位和作用，有助于了解和解释赤潮形成的生态学机制。
• On the basis of the analysis on the yangtze vole ' s disaster history and condition in dongting lake area , the influence of the lake beach ' s environmental evolution on the vole disaster is studicd in this paper . the rise of low - middle - level beach area causes the vole ' s population explosion , the reduction of high - level beach area forces the voles into the farmland during the flood season , and the emergence period ' s continual increase extends the vole ' s habitat areas and forces them to migrate into the farmland . the discarded dike provides a rest place halfway for the voles , which escape the flood , and the natural enemies of the voles , which are a natural barrier against the vole ' s population expansion , decreases . according to this study , the conclusions are put for ward as follows : after three - gorge project ' s construction it will produce great influences on the beach evolution in dongting lake area , leading to the changes of the vole ' s ecological environment situation and resulting in the vole ' s population changes which deserves attention
  在分析洞庭湖区东方田鼠暴发成灾史及灾情的基础上,研究了洞庭湖区洲滩演变对东方田鼠暴发成灾的影响.研究认为,中低位洲滩出露面积不断增大使东方田鼠种群迅速膨胀,高位洲滩出露面积减小造成汛期东方田鼠大量向垸内农田迁移;湖区洲滩冬春季连续出露天数增加延长了东方田鼠的繁殖期;汛期洪峰水位增高,洲滩大面积淹没迫使东方田鼠大量迁向垸内;湖内废弃湖堤为东方田鼠逃避洪水提供了中途休养之地;洲滩地抑制东方田鼠种群膨胀的天敌数量已大大减少.据此,本文指出,三峡工程建成后将对洞庭湖区洲滩演变产生重大影响,因而将改变东方田鼠种群生态环境条件,引起种群动态变化,值得注意
• Research on the egrets mixed population in xiamen egret natural reserve found that the reserve and its extending area provided the population fitting conditions through winter . the dominating component is little egret ( elpetta garzetta ) and there were some large egret ( egretta alba ) , cattle egret ( bubulcus ibis ) and few chinese egret ( egrtta eulophotes )
  2000 2001年，对厦门白鹭自然保护区的鹭类种群动态研究表明，保护区及其周边地区为鹭类种群提供了优良的越冬条件，越冬鹭群主要包括白鹭和少量牛背鹭与大白鹭，偶见黄嘴白鹭。
• In order to understand the nature of the ecologist ' s investigation ， we may think of the density - dependent effects on growth parameters as the “ signal ” ecologists are trying to isolate andinterpret ， one that tends to make the population increase from relatively low values or decrease from relatively high ones ， while the density - independent effects act to produce “ noise ” in the population dynamics
  为了能理解生态学家们所从事的研究的性质，我们可以把那些作用于增长参数的密度依赖效应视作生态学家们力图将其分离并予以解释的“信号” ，正是这一信号倾向于使种群从相对较低的数值递增，或从相对较高的数值递减；而与此同时，那些密度独立效应起到的作用则构成了种群动态变化中的“噪音” 。
• This note studies two - species metapopulations dynamics com mon model considering of the affect of interspecific interaction to colonization and extinction rate and rescue effect , demostrates the conditions of two specie s capable of coexistence in the competitor , predator - prey or mutualist system
  在考虑种间相互作用对定居率和绝灭率的影响以及逃避效应的基础上建立了两物种相互作用的异质种群动态的一般模型，通过模型分析说明了竞争、捕食和互惠共生系统中两物种能够共存的条件