種群指數 的英文怎麼說
中文拼音 [zhǒngqúnzhǐshǔ]
種群指數
英文
population index-
According to the phylogenetic tree, the thirteen strains were grouped into four distinct pcr - rflp clusters, namely, coriaria group, myrica group, myrica - casuarina - alnus group and casuarinarmyrica group
結果顯示弗蘭克氏菌種群內的遺傳多樣性較高,種群分化較大, 13株供試frankia菌株平均每個位點的多樣性指數為0 . 4498 。3 ) the cochineal insect can develop well when the light is 601ux to 9801ux while the temperature and humidity are at suitable levels. comparing from the population tendency index, the index is larger under weaker light
3 )在光照對胭脂蟲的影響方面,只要有適宜的溫濕度條件, 601ux到980lux的光照強度下胭脂蟲均能正常發育,從種群趨勢指數上看,弱光下胭脂蟲的種群趨勢指數更大。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。The results showed that plant height, crown breadth, leaf number, leaf breadth and sporophyll number of dryopteris crassirhizoma populations were influenced by forest crown density and light condition
結果表明:林分郁閉度和光照條件顯著影響粗莖鱗毛蕨種群的株高、冠幅、葉片數量、葉片寬度、孢子葉數等形態指標。Previous researchers have always determined the sp atial distribution patterns ( sdp ) of castanopsis kawakamii with a sample - dis tance method. however, the distribution patterns may be affected by the quadrat si ze and, in the course of analysis, the density differences among the cluster plots are not considered ; therefore, differences of cluster plot size and the dispersi on degree among individuals of cluster plots can not be known. authers of this pa per have determined the spatial distribution patterns of castanopsis kawakamii population in different habitats by means of non - quadrat distance method and a nalysed the pattern intensity and grain of the sdp. the pattern intensity is defi ned with the relative density differences and the pattern grain can embody the d ispersion degree of the individuals in the plots, and the dispersion degree among the plots. the determined results are as follows. the intensities of the species range in order from strong to week : litsea mollifolia p. kawakamii i. purpure a r. cochinchinensis c. kawakamii c. carlessii d. oldphamii s. superba. the gra ins of the species queue in order from coarse to close : s. superba = litsea mollif olia r. cohinchinensis c. kawakamii = i. purpurea c. carlessii p. racemosam d. oldp hamii. these determined results tally basiclly with the results authers of this paper have got in determining the same plots by means of aggregate index access ing method. in view of this, it is held that the sdp of c. kawakamii is closely related to the habitats and biological features
前人都是採用樣方方法對格氏栲種群數量的空間格局進行測定,而格局分佈有可能受樣方大小的影響,且分析過程中沒有涉及聚塊間密度差的問題,因而無法掌握種群的聚塊大小差別及聚塊內個體間的離散程度.本研究採用無樣方距離法,測定不同生境的格氏栲種群空間格局,分析格氏栲種群格局的強度和紋理.強度以聚塊和間隙的密度差來定義,紋理則是體現聚塊內個體間的離散程度與諸聚塊間的分離程度.測定結果表明,格氏栲種群格局強度從高到低排列次序為:木姜子蚊母樹冬青茜草樹格氏栲米櫧虎皮楠木荷;格局紋理從粗到細的順序是:木荷=木姜子茜草樹格氏栲=冬青米櫧蚊母樹虎皮楠.這一測定結果與作者採用聚集度指標測定相同樣地格氏栲種群空間格局的結果基本相符.因此,格氏栲空間格局類型及分佈與格氏栲生物學特性及生境的關系密切By whitening the covariance matrix of flat ambiguity, correlation between ambiguity components, the number of local extrema of cost function is reduced. the search program getting into precocity is avoided by suitable encoding and genetic operation
通過白化處理模糊度,減少模糊度搜索中指標函數的局部極值點,採用適當的編碼和遺傳操作使得在種群個體較少的情況下避免搜索陷入早熟。The results of variance analysis showed the variant extent of above 5 morphologic characters was plant height > crown breadth > sporophyll number > leaf number > leaf breadth in turn
方差分析結果表明: 5個形態指標在種群間的差異程度依次為株高冠幅孢子葉數葉數葉寬。Meanwhile, the study also shows that the diversity of studied cave animals is inversely proportional to human population density and water quality ; and bio - diversity, to some extent, is proportional to soil fertility and amount of chemical fertilizer, but inversely when excessive ; the correlativity between bio - diversity and vegetation cover rate is not obvious, when ground vegetation is strongly interfered by human being ; the amount of diestrammena marmorata is proportional to the d iversity of plant, and inversely proportional to soil fertility, and in a way, to water quality ; and the correlativity between community and water quality and soil fertility, and between water quality and the amount of mosquito and fly, is not as good as expected. the author points out that diestrammena marmorata, bat, mosquito, fly, oreolalaxrhohostig metus ( or cudata ), and fish can be chosen as in
同時,研究還表明:調查洞穴的物種多樣性與人口密度、水質成負相關;在一定范圍內,物種多樣性與化肥施用量、土壤肥力成正相關,超過一定的值則成負相關;在人類對地表植被的高強度作用下,物種多樣性與植被覆蓋率的相關性不明顯;蚊蠅數量與土壤肥力基本上呈正相關;斑灶馬數量與植物種數呈正相關,斑灶馬數量與在一定水質范圍內與水質呈負相關,與土壤肥力呈負相關;群落數與水質和土壤肥力、蚊蠅數量與水質都不能表現較好的相關性;研究認為,可以選擇斑灶馬、蝙蝠、蚊蠅、紅點囊蟾(或有尾類) 、魚類等作為指示動物對洞穴環境進行監測。With the increase of abandoned time, perennial plants increased, the function communities were richer, p diversity index in two communities reduced with abandoned interval, but the vegetation restoration was slow, the land abandoned for 30 years have not got to climax community
隨撂荒年限的增加,多年生植物的種類和數量逐漸增加,植物群落功能群構成逐漸豐富,群落間多樣性指數隨撂荒時間間隔的增大而逐漸減小。但植被恢復緩慢,撂荒30年仍未達到頂極群落階段。So it plays an important role and demonstrates its unique advantages over other soil animals in the assessment of heavy metal contamination of environment ; this review first briefly summarizes some methodological systems and major parameters ( community structures, species character, survival, growth, reproduction, metallothionein, and enzyme ) used in the study of ecotoxicology and other related biomarkers in applying collembola in ecological risk assessment of polluted soils
本文簡要概述彈尾目昆蟲在污染土壤生態風險評估中、生態毒理學研究以及其他相關生物標志物研究上的一些方法體系及檢測主要指標參數(群落結構,種群特徵,生存率,生長率,繁殖率,金屬硫蛋白和酶活指標) 。The results were following : ( l ) generally, all four indices showed the similar variation patterns in species diversity ; ( 2 ) generally speaking, the order of species diversity indices changed with the pattern : shrub layer tree layer herb layers ; ( 3 ) the species diversity of evergreen broadleaved forests was larger than that of warm conifer forests ; ( 4 ) the species diversity of forests in meizi lake area has been affected by human factors
結果表明: ( 1 )梅子湖森林植被樣地物種多樣性測度的結果,上述4種指標總體上表現出相同的變化趨勢。門)總體看來, 14個樣地的物種多樣性指數在群落不同層次的變化規律為:灌木層喬木層草本層。 ( 3 )不同植被類型的物種多樣性特徵是:常綠闊葉林暖性針葉林。Abstract : the study of pingwu cattle the ecological factor of the main place of origin, its appearance, its body measurements and the comparison with other cattle breeds in sichuan, shows that, in body measurements, appearance, and body measurements index, pingwu cattle is different from other cattle breeds, it " s improved breeds draft cattle in the north - west mountain erea of sichuan, it has characteristics of draft and meat cattle
文摘:對平武黃牛主產區生態條件的調查、外貌的觀察和體尺的測定,與四川現有黃牛地方品種的比較分析,結果表明平武黃牛在體尺、外貌、體尺指數等方面有別于其它黃牛品種,是川西北山區良好的役用型黃牛種群,具有向役肉兼用型方向發展的優良特性。In this paper, with the helps of the ordinary ecological site - study techniques, electrophoresis and the multivariate analyses, from both the levels of morphological and allozymic variation, we studied the differentiation patterns of 29 morphological characters and 6 allozymes of 97 individuals from 7 populations of euonymus chloranthoides yang, an endangered plant species which is endemic to mt. jinyun of chongqing. we also studied the relationship between such differentiation and its environment factors
本文以處于瀕危狀態的縉雲衛矛為研究對象,在測定了各種群的生存環境因子基礎上,從形態和等位酶兩個層次採用多種數量分析方法對縉雲衛矛7個種群97個個體的29項形態指標及6種等位酶反映出的生態遺傳分化及其與環境的關系進行了研究。Results demonstrate that with the succession going on from herbosa shrubs coniferous forest theropencedrymion evergreen broad - leaved forest, abundance and diversity index of species, biomass and productivity of vegetation all show a rising trend prior to the formation of a mature and stable biotic climax
結果表明:隨著草叢灌叢針葉林針闊混交林次生常綠闊葉林正向演替的進行,在未形成成熟而穩定的頂極群落之前,物種豐富度、物種多樣性指數、植被生物量及生產力都呈增大趨勢。The obtained results do not support a major gene for body mass index in chinese, the discrepancies between our study and previous studies may result from ethnic difference between chinese and other populations ; the general model provides the best fit to the data, while the environmental model is the second parsimonious model, perhaps due to complex mode of body mass index inheritance ; a moderate heritability estimate is found for body mass index ( h2 = 0. 313 ), lower than that of other populations, this is presumably due to the fact that aside from the influence of genetic bases, body mass index is strongly influenced by environmental factors and that there is a low proportion of obese individuals in samples ( only 4. 1 % individuals have body mass index > 30 )
分離分析的結果表明, ( 1 )體重指數不存在主基因分離,不同於在其他非中國人群中檢測的結果,說明存在種群差異性; ( 2 )一般模型提供了最合適模型,環境模型是次之的嚴格模型,可能由於體重指數遺傳模式的復雜性所致; ( 3 )中國人群中體重指數具有適中的遺傳率( h ~ 2 = 0 . 313 ) ,低於其他人群中的結果,這是由於體重指數除了受遺傳因素影響外還受環境因素影響及樣本中低比例的肥胖個體( 4 . 1的個體bmi 30 )的原因。The ants " quantity is 2203, and whose dominance index is 0. 2832. the quantit y of the rove beetles of the coleoptera is 1619, and whose dominance index is 0. 2081. the pyralids moths and outlet moths of the lepidoptera, the leafhoppers of the homoptera, the darking beetles of coleptera and blow flies of the diptera take the dominant place in moderate insect community
中性昆蟲群落中,以膜翅目蟻科種類及數量最多,其群落數量為2203頭,優勢度指數為0 . 2832 ;其次是鞘翅目隱翅甲昆蟲,數量為1619頭,優勢度指數為0 . 2081 ;再次是鱗翅目的螟蛾、夜蛾,同翅目的葉蟬,鞘翅目的擬步甲,雙翅目的麗蠅等昆蟲。X2 test with 2 2 contingency table and ochiai indices were used to analyze the interspecific association of 12 dominant species of meadow community and 20 dominant species of scrub community and 18 dominant species of tree community. pearson ' s correlation coefficient and spearman ' s rank correlation coefficient were also applied to calculate correlations between species
在該地區植被的優勢種的種間關系的研究方面,運用2 2列聯表、 x ~ 2檢驗方法對群落優勢種進行總體相關性和種對間的聯結性檢驗,利用共同出現百分率jaccord指數測定種對間的關聯度,應用pearson相關系數和spearman秩相關系數刻畫種對間的數量變化關系。A generalization, n > 4, is given in this paper. in result the critical points of these koch curve with different values of tv by decimation based on ising model are same, but the critical exponents are different. the four ones, , are same, and the other two v, are different
本文對其進行一種推廣,推廣后n 4 ,對于取不同n值的科赫曲線應用重整化群的格點消元法,仍採用ising模型,結果得到同樣的相變點,但是臨界指數不完全相同,其中, , ,相同,而,不同。" in heavily fished areas like hong kong you would expect to see some recovery of the fish populations around five years after fishing is banned, and it is highly likely that the two core areas which are just a few hundred metres in length are far too small to benefit larger fishes like parrotfishes which may roam over considerable areas, " dr. cornish said
鄺力存博士指出:在香港等捕魚活動頻繁的地區,通常在禁止捕魚約五年後,魚類種群的數目理應有所回升。雖然現時設有兩個禁捕核心區,但縱長只有數百米,體形較大且活動范圍較廣的魚類如鸚鵡魚等未必能受惠。A recently published report, written by dr yvonne sadovy at the university of hong kong and other scientists, suggests wild populations of humphead wrasse have become severely reduced and that within the next ten years may disappear completely if the fishing trend continues
一份由香港大學薛綺雯博士和其他科學家合力撰寫的最新報告指出,野生蘇眉種群的數目正大幅減少,若目前的捕撈趨勢持續,有可能于未來10年絕種。分享友人