種群增長型 的英文怎麼說
中文拼音 [zhǒngqúnzēngzhǎngxíng]
種群增長型
英文
population growth form-
The growth dynamics of tree basal area of form. taxus chinensis var. mairei population in different altitude were discussed using the liu - logistic model, and the results showed that the altutide of 790 meters is more suitable to the survive of form. toms chinensis var. mairei population than 990 meters. plot sampling was selected and dynamic analysis was used to study the height structure of taxus chinensis var. mairei population, and the quadrate picture of height structure and the curve of survival rate were drew
運用改進模型對南方紅豆杉種群在不同海拔梯度的種群優勢度增長進行了探討,表明海拔790m處的南方紅豆杉具有較大的環境容納量,但增長速度不快,海拔990m處的南方紅豆杉種群環境容納量不高,但具有較大的增長速度,這可能與群落的發育階段不同有關,兩地海拔均為南方紅豆杉適宜的生長海拔高度,相比而言,海拔790m的珍稀瀕危植物南方紅豆杉種群數量特徵的研究高度更宜於南方紅豆杉種群的生長。The method of modified simplex was applied to optimize the models, and the fitting results show that liu - logistic model was more suitable than logistic model to the actual growth trend of form. taxus chinensis var. mairei population, and the highest growth rate of basal area was the tenth age class, namely the phase when breast diameter was 68 ~ 76 cm
以胸高斷面積代替種群生物量,分別採用logistic常規模型及劉金福提出的logistic改進模型對南方紅豆杉種群的增長動態進行研究,運用改進單純形法對模型進行優化,擬合結果表明改進模型比logistic常規模型更符合南方紅豆杉種群的增長趨勢,南方紅豆杉種群的最大增長速度出現在第10齡級,即胸徑為68 76cm時期。The vegetative tiller can produce more buds than the reproductive tiller on hordeum brevisubulatum population, and the age structure of bud from either vegetative tiller or reproductive tiller is an increasing model
野大麥種群營養蘗分蘗節的營養繁殖力比生殖蘗強,營養蘗和生殖蘗上芽的組成亦均為明顯的增長型年齡結構。The bud bank is composed of 3 age classes bud on leymus chinensis, arundinella hirta and hordeum brevisubulatum populations, 2 age classes bud on hemarthria japonica, calamagrostis epigeios and c. rigidula populations. the age structure of bud is obviously an increasing model in all of 6 grass species
羊草、野古草和野大麥種群芽庫由3個齡級組成,牛鞭草、拂子茅和硬拂子茅種群由2個齡級組成, 6種禾草芽庫的年齡結構均為明顯的增長型。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。The winter tiller is more than the spring tiller at quantity hi leymus chinensis, calamagrostis epigeios and c. rigidula population at the beginning growing season. it is an efficient strategy to increasing survival fitness and propagating potential for rhizome grass to grow many active and strong winter tillers
生長季初期,羊草、拂子茅和硬拂子茅種群返青的分蘗株以冬性植株多於春性植株,冬性植株生活力旺盛、抗性強,形成冬性植株是根莖型禾草種群提高生存適合度,增強營養繁殖力的有效策略。Logistic model is one of core theory in population ecology. it almost the only model to describle population growth for about one hundred
Logistic模型是種群生態學的核心理論之一。 100多年來,它幾乎是描述種群s型增長的唯一數學模型。It was shown that the species compositions became richer and richer from upper mountain slope to low mountain slope and pin us yunnanensis, keteleeria evelyniana, cyclobalanopsis delavayi populations as the dominant population belonged to degenerative growth type, up growth type and stable growth type, respectively
結果表明:從山坡上部到下部,物種的組成越來越豐富,其中的優勢種群雲南松屬于衰退型、滇油杉屬于增長型、黃毛青岡屬于穩定型。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。2, the survival curves of populations of e. chloranthoides in jigong mountain and dongwenquan are diagonal, which indicates that the individuals of each age grade within the two populations possesses the roughly identical death rate and the populations belong to the stable ones, while the survival curve of population in beiwenquan is concave, which shows that the population belongs to the increase one
2 、種群存活率曲線表明,雞公山和東溫泉的縉雲衛矛種群存活率均呈對角線型,說明這兩個種群屬于穩定型,而北溫泉種群的存活率曲線呈凹型,屬于增長型種群。The model was reliable and accurate, it can be used to forecast of diameter growth and can amplify and develop the methods of population ' s development and prediction
經檢驗,該模型預測胸徑的生長量具有較好的可靠性和精度高等優點,從而豐富和發展了種群增長模擬與預測預報的方法。By building up tumor growth aerodynamic model, when tumor growth aerodynamic laws is research to find : the process of tunor increasing squares with economic growth of gompertz growth parabola description ; we further study that gompertz growth parabola squares with population growth and regulation of logistic growth parabola description
摘要通過建立腫瘤增長動力學模型,研究腫瘤增長動態規律時發現:腫瘤增長的全過程與龔珀茲增長曲線描述的經濟增長過程完全相符;進一步給出了龔珀茲增長曲線與描述種群的增長與調節的邏輯斯蒂增長曲線完全相似。An increasing age structure of tiller or bud in the population indicates that the young tillers or buds have taken the predominate status, thereout the population is kept in the " young " period. it is a propagating mechanism to maintain population " forever " existing
在種群中分桑株和芽的增長型年齡結構意味著幼齡分桑株和幼齡芽占優勢地位,由此可保持種群始終處于「年輕」階段,是種群維持「永久」生存的繁殖機制。Relative results which have obtained in [ 1 ] are generalized. results provide theory basis for objective management of renewable biological resources. many objective problems often be trans - ferred to how to find the solution of differential equation ( ode, fde )
本文在第二部分研究了以gilpin - ayala單種群增長模型為基礎,假定生產函數為ex ~ (為正常數)的捕獲模型的最優開發問題,確定了最優開發策略,推廣了文獻[ 1 ]中已有的相應結果,為可再生生物資源的實際管理提供了理論依據。Stability analysis of solutions to the mathematical model describing a class of biomass increases
一類生物種群增長的數學模型解的穩定性分析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佈的單種種群的時空動態.討論了種群空間分佈的穩定性及穩定綴塊分佈與種群在綴塊間遷移率和子種群增長率之間的關系,並由此提出了促進全局種群增長的措施Oscillation of positive solutions of a single population growth model
一類單種群增長模型正解的振動性In [ 17 - 20 ], some single - species models of growth were given
文獻[ 17 - 20 ] ,給出了一些單種群增長模型The age structure of rhizome is an increasing model at length and weight at the end of growing season
在生長季末,種群中根莖在累計長度和重量上均為增長型年齡結構。A good number of saplings and middle - sized piants were found and most of them were individuals of dbh ranging from 2 to 4 cm. the number of old individuals were relatively small
幼樹和中等大小個體的數量較多,且絕大部分集中在2 4cm徑級,老齡個體較少,屬增長型種群。分享友人