種群生存 的英文怎麼說
中文拼音 [zhǒngqúnshēngcún]
種群生存
英文
group survival-
In the present study, aflp ( amplified fragment length polymorphism ) markers was used to examine population of abies yuanbaoshanensis in order to understand the level of population genetic variation and genetic structure. the result would help to evaluate its evolutionary potentiality and the degree of being endangered and could provide scientific basis for making right protection strategy. high - quality dna was extracted using ctab method from those tender leaves of forty - three fully - developed trees in population abies yuanbaoshanensis
本研究選用一種高效的檢測遺傳變異的分子標記? ? aflp技術來分析元寶山冷杉種群的遺傳多樣性，旨在了解該種群在分佈區內的遺傳變異水平和遺傳結構情況；研究結果將有助於更清楚地認識這一瀕危類群的生存潛力和瀕危程度，而且可以為制定何種挽救和保護措施提供科學的依據。Under mixed culturing conditions, it was observed that bacterial number rapidly incre ; ised soon after the lysing of host cells. on the contrary, while the non - host cyanobacterium ( i. e. anabaena flos - aquae ) was incubated in the mix culturing system, the breeding of the bacteria could be inhibited. it may be suggested from the result above that cyanophage could bring about the changes in microorganism populations
調查結果顯示， 19個採集的水樣中有6個含有裂解織線藻的噬藻體，而且水樣未經濃縮即能裂解宿主，說明噬藻體在淡水中分佈較廣泛，裂解性也較強；混合培養條件下的研究結果表明，噬藻體裂解宿主后，細菌數量快速增加，而當培養系統中有非宿主藻類存在時，細菌的增殖則受到非宿主藻的抑制，說明噬藻體可以顯著改變系統中微生物的種群結構。The perennial vegetation is expected to a. ordosica dominated and h. scoparium stably co - existed, together with an annual plant population of e. poaeoides and b. dasyphylla, which is greatly fluctuated with annual precipitation pattern
其將與因年際間降水量及其分佈差異引起的種群密度等特徵波動的一年生草本小畫眉草和霧冰藜種群長期共存。On the basis of foreign documents, the dissertation firstly describes the morphology, taxonomy, and biological characters of cochineal insects. then, by using artificial climate cases in the lab, according to orthogonal design, 8 lands of combinations of temperature, humidity and light is set, while the temperature has four levels : 15, 20, 25 and 30, and the relative humidity has two levels : 60 % and 80 %, while the light also has two levels : 980 lux and 60 lux. through observations and analysis of hatching percentage, survival percentage of the first instar and during from the second instar to the adult, the population tendency index, generation life cycle, size and eggs of female adult, the development of the cochineal under different conditions is studied
在收集、整理國外對胭脂蟲的研究資料基礎上，首先從胭脂蟲的形態學、分類學、生物學特性入手，進而在實驗室內利用人工氣候箱，應用正交設計方法，設計了4種溫度、 2種濕度、 2種光照梯度的不同組合，通過測定胭脂蟲的孵化率、 1齡若蟲的存活率、 2齡若蟲至成蟲期存活率、種群趨勢指數、世代歷期、雌成蟲的大小、懷卵量等生物學指標，深入研究胭脂蟲在這些組合下的生長發育狀況，應用數理統計方法，分析出溫度、濕度和光照對各項生物學指標的影響，找出胭脂蟲適宜的室內培育條件，並為野外胭脂蟲的培育提供一定的理論依據。Demography and survival analysis of picea schrenkiana
天山雲杉種群統計與生存分析As an important part of the morph - functional research of animals, the diversity of hair micro - structure is of significance for the discovery of species adaptation and evolution. hair structural diversity provides parameters to interpret the divergent adaptation and evolution tendency in different ecocommunities. physical principles introduced probed into the interpretation of the mechanism that the hair microstructure forms and the relatedness between structure and function, animal behavior and ecology
毛發微觀結構多樣性研究作為動物形態與功能多樣性研究的內容之一，對揭示毛的形態結構與功能多樣性在物種生存和適應中的意義，具有積極作用；同時作為生態形態學的研究內容，對解釋不同生態類群中的動物體形態結構的適應和進化趨勢以及所表現出的趨同、趨異現象也將發揮重要作用；在結構形態學研究方面，應用物理學原理解釋毛的微觀結構形成的過程以及結構與功能、行為、生態的關系也很重要。Ecocline a cline that is due to a specific environmental factor, such as a gradient of heavy metal concentration in the soil
生態漸變群：由物種生存特定環境因素影響而形成的一種漸變群，例如土壤中的重金屬濃度梯度。The tiller - nodes of 6 species of rhizome grass, including leymus chinensis, hemarthriajaponica, arundinella hirta, calamagrostis epigeios, c. rigidula, hordeum brevisubulatum in songnen plain, can live at best for 2 to 5 years, and do 2 to 4 propagating generations which is the same as the age class of tiller in number. the age structure of population is an increasing model which the young tiller is more than the old at quantity and biomass. during the whole growing season, the age spectrum varies for each species
松嫩平原，羊草、牛鞭草、野古草、拂子茅、硬拂子茅和野大麥等6種根莖型禾草種群的分蘗節最多可以存活2 5個年度，可以進行營養繁殖2 4個世代，分蘗株的齡級數與分蘗節營養繁殖的世代數相同，在種群分蘗株的數量和生物量上，生長季的各個時期均以幼齡分蘗株占較大比例，呈現為明顯的增長型年齡結構，各種類的年齡譜組成各異。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
在考慮種間相互作用對定居率和絕滅率的影響以及逃避效應的基礎上建立了兩物種相互作用的異質種群動態的一般模型，通過模型分析說明了競爭、捕食和互惠共生系統中兩物種能夠共存的條件It is also the urgent work for the animal protectors. the protection work includes population viability, population genetics, environment factors and so on
而對黑熊的有效保護涉及到它的種群生存力、種群遺傳學等多方面的問題。Of the species, . characters of ecology, reproductive biology, genetic diversity, population genetic structure, endangering mechanisms, and sampling strategy have been studied in view of conservation biology. the results may be summarized as follows : by field investigation, we found that the localities recorded for four specimens of d. versipellis and d. pleiantha had disappeared, and most of the present populations are located in protected subforests. the distributional range of d. versipellis has also been reduced greatly, evidently, the number of present populations has decreased, the resources are reduced sharply, and the species are clearly endangered
從保育生物學的角度，對八角蓮種群生態學和生物學特性、遺傳多樣性水平和遺傳結構、瀕危機制及保育取樣策略進行了研究，結果如下：通過野外調查發現，原標本記載的一些八角蓮和六角蓮種群已難以找到，該類群目前多分佈於自然保護區外圍次生林地帶，分佈范圍明顯縮小，現存群體的規模也明顯減少，資源量貧乏，物種處于瀕危狀況。The research can offer some important references to the population ecology of endangerous plant, too. based on the dates of two different circumstances, two standard life tables of form. taais chinensis var. mcarei population are founded by mathematical technique according to premising with " space deducing time ", and the curves of survival rate, mortality rate and killing power were drew. the results showed both of the survival curves of population appeared to be a type of deevey - iii and the high mortality of seeding is one of the important reasons which caused taxus chinensis var. mairei to be endangered, which badly limited the enlargement of form. taxus chinensis var. mcarei population
由於南方紅豆杉無解析木，因而以「空間推時間」 、 「橫向導縱向」方法，將林林依胸徑大小分級，以立木級結構代表年齡結構，採用分段勻滑技術，對兩個不同生境的南方紅豆杉種群編制特定時間生命表，繪制存活曲線，結果表明不同生境的南方紅豆杉種群的存活曲線均趨于deevey -型，兩地差異較小，幼苗死亡率極高，不同生境的幼苗死亡率均達到96以上。Through the life analysis of mortality rate in different brand age, brands group life can be anticipated in order to explorate survival evolution rules of brands group
運用生命表可以計算品牌的死亡概率和品牌群體壽命的預期，對行業品牌群體進行壽命分析，探索品牌種群生存演化規律。The close correlation of flowering with large plants might be a vulnerable point in the life cycle of changnienia amoena while facing increasing exploitation by human beings, which could threaten the survival of the species
面對日益增長的人類採掘風險，獨花蘭開花與大型植株的關聯可能是其生活史中影響種群生存的脆弱點之一。Effects of diffusion on endangered species with stage - structure
擴散對具有階段結構瀕危種群生存的影響We get the probability distribution of the population by the theory and method of markovian process, and discuss the model coefficients influencing on subsistence of a population
利用馬爾可夫過程的理論和方法，得到生物種群數量變化的概率分佈，最後討論了各模型參數的變化對生物種群生存的影響。This paper sets up a predator prey system with diffusion on two patches ; the main study is how diffusion affects the three populations ' existence when one of the two patches is polluted
摘要建立了2個斑塊上種群擴散的食餌捕食系統，主要研究了當其中一個斑塊受到輸入量存在極限值的外來毒素污染時，擴散對2個斑塊上3個種群生存的影響。There have been few useful and systemic research data so far. this research is focus on the study of minshan mountains black bear population viability analysis ( pva ) and molecular biology of black bear
為此，本研究從保護生物學的角度出發，對岷山山系黑熊種群生存力進行了分析，並對黑熊分子生物學進行了初步探討。Firstly, the identification of the double medium system is considered, the existence, the uniqueness and the boundness of the solution of the system of the partial differential equations are proved by using the monotone method, the mathematical model of the parameter identification problem is established, and under some mild assumptions, the optimality system about the identification is derived, thus the suitable gradient methods can be employed to solving the identification problem. secondly, the theories of optimal control of distributed parameter system are introduced to investigate the parameters identification problem involving the three - dimensional population system
利用單調方法證明了正問題解的存在惟一性和有界性，建立了相應參數識別問題的數學模型，並給出了求解這類識別問題的最優化系，從而可利用適當的梯度法，實現對系統參數的識別；把分佈參數系統最優控制理論引入到具有多個識別參數的三維種群生態系統的參數識別問題之中，給出了參數識別問題最優解的存在性結論，證明了狀態方程的解對識別參數的連續依賴性和g （If sites are encroached into, or species populations threatened, by unavoidable development, compensation mitigation in the form of recreated habitats and or species re - introduction should be undertaken to ensure that total biodiversity is not adversely impacted
若因不可避免的發展破壞該等生境，或威脅生物種群的存活，有關方面應實行補償計劃，包括重建生境區及或重新引入物種，確保生物多樣性不受負面影響。分享友人