Populations, communities and ecosystems 一个物种的个体可能会形成不同的种群,population定义的是在某个特定时间、某个特定区域中同个物种所有群体的总和。 群落community的定义则是在某个特定的区域中,全部生物的总和,包括不同物种形成的所有种群。 生态系统ecosystem包括群落(生物部分biotic)以及该群落所处的非生物环境...
In an ecosystem, the ___ of a species refers to the role it plays and the resources it uses. A. habitat B. population C. niche D. community 相关知识点: 试题来源: 解析 C。解析:选项A“habitat”指的是物种生活的栖息地,是一个地理区域;选项B“population”指的是种群,是同一物种个体的集合...
We use this model to predict the response of invasive species to climate change and associated changes in the invaded community. Population growth of the bryozoan increased under near-future projections of increasing ocean temperature; however, the magnitude of population growth depended on the ...
Competition is usually the more severe the denser the population. Together with predation, it is the most important density-dependent factor in regulating population growth. 11.According to paragraph 4, “species selection”is a misleading term because it A. overemphasizes the role of selection pr...
Whether the species already possesses a small population size Whether the species is very small or lives in a restricted area Whether the results of a quantitative analysis indicate a high probability of extinction in the wild After a given species has been thoroughly evaluated, it is placed into...
(Richardson et al.). However, these nonnative populations may not become invasive. Invasive species produce numerous offspring that reside away from the parent population. Richardson et al. suggest a scale of movement greater than 100m to classify a species as invasive, in less than 50years for...
There are two approaches to the use of count statistics representing the number of individual animals or species counted in a population or community. The first involves the estimation of detectability, the other the use of count statistics as indices. Such count statistics are denoted asCi(i.e....
Species Diversity issimply the number and relative abundance of species found in a given biological organisation (population, ecosystem, Earth). Species are the basic units of biological classification and hence, this is the measure most commonly associated with the term 'biodiversity'. ...
When combined with ancillary environmental or species data, this fundamental species population information directly underpins a range of biodiversity and ecosystem function indicators. The unified concept we present links disparate data to downstream uses and informs a vision for species population ...
这道题的难度竟然是“易”。。。我是有多差啊！？55555555555