種種 all sorts of; all kinds of; a variety of 設置了種種障礙 put up all sorts of obstacles; 由于種種原因 for a variety of reasons; 用種種手段 by hook or by crook; resort to every means; resort to every trick; 凡此種種, 不一而足。 such instances are legion
種群 population◇種群平衡 population balance; 種群生態學 genecology; 種群調節 population regulation
Study on population dynamics of chinese fir and its associated tree species in natural chinese fir - and - broad - leaved mixed forest in northwest fujian 閩西北天然杉闊混交林杉木及其伴生樹種種群動態研究
The first , the living planet index , measures biodiversity , based on trends in more than 3600 populations of 1300 vertebrate species around the world 第一個指標叫做生命地球指數,該指數根據地球上1 , 300種種群數量達3 , 600多個的脊椎動物的變化趨勢來衡量生物多樣性。
The temporal and spatial dynamics of a single species metapopulation is modelled by a model . the stability of spatial distribution of the population and relationships between the stable patchy distribution and migration rates and finite rate of growth of subpopulations are also investigated . finally measures to boost the growth of total population are presented through the model and analysis of the model 通過模型模擬了呈一般綴塊分布的單種種群的時空動態.討論了種群空間分布的穩定性及穩定綴塊分布與種群在綴塊間遷移率和子種群增長率之間的關系,并由此提出了促進全局種群增長的措施