species variation 中文意思是什麼

species variation 解釋
種屬差異
  • species : n. 〈sing. , pl. 〉1. 種類；【生物學】（物）種。2. 【邏輯學】種。3. 【原子能】核素。4. 【法律】形式。5. 【宗教】聖餐物。
  • variation : n 1 變化，變動。2 變量，變度，偏差。3 【語言】語尾變化；變體，異體；【數學】變分，協變；順列；【...
  1. The discontinuous component of the genetic variation pattern of a species also contains the differences among subpopulations resulting from accidents of sampling genetic drift and others.

    物種遺傳變異型不連續的成分也包含抽樣遺傳播遷和其他事故引起的亞種群之間的差別。
  2. As analyzed, ( 1 ) the rapd technique is highly sensitive to investigating genetic diversity in t. lepturus and e. muticus. t. lepturus exhibits lower polymorphism and genetic diversity than e. muticus ; ( 2 ) according to the analysis of the partial mitochondrial 16s rrna gene sequences, a very low intraspecific variation and considerably high divergence among species were found, which reveals a dual nature of conservatism and variability in mitochondrial 16s rrna gene ; ( 3 ) five primers generate the species - speeific rapd sites and these sites can be served as the molecular markers for species identification and ( 4 ) it can be proved at dna variation level that t. lepturus and e. muticus are of two species respectively pertainiag to different genera, which supported the nelson taxonomic conclusion

    分析結果表明: （ 1 ） rapd技術研究黃海帶魚和小帶魚的遺傳多樣性具有較高的靈敏度和檢出率，帶魚的多態比例和遺傳多態度均較小帶魚的低; （ 2 ）線粒體165出兇a基因序列在分析兩物種遺傳變異時表現出保守和變異的雙重特性，種內變異極小而種間較大: （ 3 ） 5個隨機引物擴增出種特異的ra衛d帶，可作為種間分子鑒定標記; （ 4 ）研究證實帶魚和小帶魚是不同屬的兩個種，從而在分子水平上支持了nelson分類系統的觀點。
  3. The role of introgression in shaping the genetic variation pattern of the species should be seen in the same light.

    在形成種的遺傳變異型中，種質滲入所引起的作用也應當用同樣的見地來看待。
  4. 3. the sequence variation of mitochondria ! cytochrome b gene and phylogenetic relationships of anseriformes were studied based on the complete cytochrome b gene sequences of 19 species combined with 4 species got from genbank

    3 、研究測定雁形目鳥類19f mtdna細胞色素b基因全序列，結合genbank中的4個物種，分析了雁形目鳥類細胞色素b基因的序列變異及其分子系統發生。
  5. 2. the sequences variation of mitochondrial 12s rrna gene and phylogenetic relationships of anseriformes were studied based on the complete 12s rrna gene sequences of 36 living species of which 19 species were sequenced and other related data obtained from genbank

    2 、研究測定了雁形目（ anseriformes ） 19種mtdna12srrna基因全序列，結合genbank中雁形目種類相關數據，分析了雁形目36種鳥類12srrna基因序列變異及其分子系統發生。
  6. Among avian orders, the anseriformes ( screamers and waterfowls ) are a morphologically and biologically diverse group containing ca. 150 species distributed worldwide except antarctica. this paper will review the phylogeny of anseriformes firstly and then discuss the molecular phylogeny of anseriformes based on the genetic variation of mitochondrial 12s rrna gene and cytochrome b gene respectively

    本文首先對雁形目鳥類的系統發生研究進行了綜述，然後分別基於雁形目鳥類線粒體dna12srrna基因和細胞色素b基因全序列的遺傳變異分析，探討了雁形目鳥類分子系統發生。
  7. 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。
  8. We concludes that the selected herbicide for smooth cordgrass does not obviously affect community composition and the habitats of benthic species, the coherent variation trend of benthic community composition correlates with time between experimental zone and controlled zone

    這表明互花米草防除藥物對底棲生物群落組成結構及其生境的干擾不大，試驗區與對照區底棲生物群落組成結構總體一致的變化趨勢與時序有關。
  9. In this dissertation, the author analyzed plant biodiversity in yunmengshan forest region with field survey on plant species and forest vegetation, the results show that : the vascular plants in yunmengshan forest region include 548 species ( variation ) which belong to 319 genera, 98 families, the flora geographical composition are complex, the dominant characteristics of flora are temperate zone plants which account for 55 percent, herbaceous species occupy 75 percent exclusively. evaluating the threatened hierarchy of plants in yunmengshan forest region, the results show that the number of critically endangered species is 7, endangered species isll, vulnerable species is 53, lower risk species is79, safty species 376

    本文在對雲蒙山林區的植物物種、植被進行調查的基礎上，進行植物多樣性分析，研究結果如下：雲蒙山林區共有維管束植物98科319屬548種和變種，地理成分復雜，包括中國全部屬的15個分佈區類型，區系組成以溫帶成分為主，佔55 ；生活型譜中，草本植物種類占絕對優勢，比例為75 . 3 ；通過瀕危評價，得出雲蒙山林區植物極危種7種，瀕危種11種，漸危種53種，敏感種79種，安全種376種。
  10. 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。
  11. 3 eight communities are identified by gradient analysis in desert - oasis ecotone, and species are divided into 5 ecological groups. dca ordination is superior to cca and dcca. variation of vegetation explained by environmental and spatial factors reaches 23. 4 % ; among these the species matrix explained by non - spatial soil factors account for up to 11. 5 % of variation, spatial variation that is not shared by soil factors explains up to 11. 6 %, their interaction explains up to 0. 3 %

    3 、通過梯度分析，阜康荒漠綠洲過渡帶群落可分為8個類型，物種可分成5個生態類型； dca排序效果優于cca和dcca ；土壤和空間因子解釋了植被分異的23 . 4 ，其中土壤因子佔11 . 5 ，空間因子佔11 . 6 ，二者交互作用佔0 . 3 。
  12. On the basis of examination of more than 2000 specimens ( including types ) from 15 herbaria worldwide, the characters features of species, phonological phase, ecoloigical habit and the relation to close species were analyzed, recorded and described, the disputed species were compared, measured and counted in detail, the quantitative analysis to different characters was done through dot - map, the variation pattern of major morphology characters was analyzed and their significance for a better delimitation of the species was evaluated

    查閱或借閱國內外17個標本館近2000份標本（包括模式標本） ，描述了每個種的性狀特徵、物候期、生態習性及其與近緣種的關系，確定性狀的極性，對有爭議種的形態性狀進行詳細的測量和比較，用散點圖對個別性狀作定量研究，分析了主要外部形態學性狀的變異式樣、變異幅度及其對劃定物種范圍的價值。
  13. The main results are summarized as follow : 1. gross morphology on the basis of field observation and examimation of herbarium specimens, the variation pattern of all the major gross - morphology characters in machilus from zhejiang was studied, and their taxonomic significance was evaluated. the results show that the most reliable characters for the delimitation of species are the features of the leaf, the tepal and the fruits. the secondly important characters are the length and position of the florescence

    形態性狀分析分析結果表明：潤楠屬植物的分類性狀主要有小枝、葉片、花序、花被片、果實等特徵特性，其中花被片、葉片、果實是潤楠屬的重要分類性狀；花序的長度及著生位置也是區分潤楠屬種間的重要標志之一；小枝的毛被在分類上具有第三位的重要性。
  14. The study shows that the early and late seed rains of constructive tree species in evergreen broadleaved forest at chongqing simian mountain had no activity. the bigger the seeds of the species and the earlier or later the seeds of the species matured, the higher the proportion of the seed rain damaged by animals. the quantitative variation of seed rain, active seed rain and seed bank did not take place at the same time. at early time, the number of seed banks of castanopsis fargesii, lithocarpus glabra, quercus myrsinrefolia, castanopsis plasyacantha, cinamomum subavenium. which own more active seed rain increased by geomitric series. the seed banks of castanopsis orthacantha and schima argentea were small, only survived a short time, and did not sprout next year. the quantitative dynamics of seed banks and their increasing or decreasing rates were decided by the proportion damaged by animals, dying speed of seeds and their resistance to pathogens and adverse circumstances, and the state of seed germination

    對重慶四面山常綠闊葉林建群種種子雨、種子庫的研究表明，建群種早期和晚期的種子雨無活力;種子偏早或偏晚成熟及大籽粒的樹種，其種子雨被取食的比例大;種子雨、有活力種子雨、種子庫三者的數量變化不一致;有活力種子雨量較大的栲、石櫟、小葉青岡、扁刺栲、香桂等，其種子庫密度在早期以近幾何級數的方式增長，元江栲、銀木荷種子庫小，存在時間短，翌年無一年生萌發苗;種子庫數量動態、消減率動態決定於種子被取食的強度、種子衰老的速度以及種子對病菌、逆境的抗性和種子萌發的整齊性
  15. After spraying the herbicide, the results with time show that no obvious quantitative difference occurred in benthic species composition, biomass, inhabit density and the coherent variation trend between experimental zone and controlled zone

    藥物噴灑后不同時段調查結果表明：試驗區與對照區的底棲生物種類組成、生物量、棲息密度同步對比數量相差不明顯，其隨時間變化的趨勢亦呈現總體一致。
  16. The results showed that there existed distinct variation in endosperm cells of leymus species. different species had different endosperm cells. the significant variations were mainly included differences in the sizes, forms and quantity of endosperm cells

    2 .對21個物種的胚乳細胞特徵進行觀察測量，結果表明賴草屬植物種子胚乳細胞存在豐富的多樣性，不同物種的胚乳細胞在大小、形狀和數量上均表現出明顯的差異，其胚乳細胞的特徵具有共屬分種的意義。
  17. Mean, variance, standard deviation, coefficient of variation of fourteen vital morphological characters indicated that great diversity existed either among species or among populations, with cv ranging from 28. 89 - 122. 36 % ( except dtm, which has a cv of 4. 72 % ). correlation analysis indicated that il showed a significant positive correlations with pfk ll and lw ( p < 0. 05 ), but a negative correlation with nm ( p < 0. 05 ). there were also strong positive correlations between each other of ll, lw, la and sw

    相關分析表明，節間長度與株高、葉長、葉寬呈顯著正相關，而與主莖節數呈顯著負相關；葉長、葉寬、葉面積、千粒重四個性狀相互之間存在極顯著正相關；干重和單株種子產量兩者之間存在極顯著正相關；出苗率與千粒重之間存在顯著負相關；生長習性與分枝數之間存在顯著正相關；全生育天數與生長習性之間存在顯著負相關。
  18. Niche and genetic differentiation of several desert plants were detected to analyze the relationship between niches and genetic diversity of desert plants, test niche breadth variation hypothesis, and probe the reasons for haloxylon ammodendron endangering. in this paper, the study on plant community species diversity and genetic diversity in the region will provide scientific theory basis for conquering desert

    從物種多樣性和遺傳多樣性兩個層次上，闡明了荒漠地區的生物多樣性特徵；在分析幾種荒漠植物（堿蓬、叉毛蓬和梭梭）遺傳變異和生態位的基礎上，探討荒漠植物種的生態位與遺傳多樣性的關系，驗證關于生態環境與遺傳變異的生態位寬度變異假說。
  19. Abstract : biological invasions are a continuous feature of a non - equilibrium world, ever more so as a result of accidental and deliberate introductions by mankind. while many of these introductions are apparently harmless, others have significant consequences for organisms native to the invaded range, and entire communities may be affected. here we provide a survey of common models of range expansion, and outline the consequences these models have for patterns in genetic diversity and population structure. we describe how patterns of genetic diversity at a range of markers can be used to infer invasion routes, and to reveal the roles of selection and drift in shaping population genetic patterns that accompany range expansion. we summarise a growing range of population genetic techniques that allow large changes in population size ( bottlenecks and population expansions ) to be inferred over a range of timescales. finally, we illustrate some of the approaches described using data for a suite of invasions by oak gallwasps ( hymenoptera, cynipidae, cynipini ) in europe. we show that over timescales ranging from 500 10000 years, allele frequency data for polymorphic allozymes reveal ( a ) a consistent loss of genetic diversity along invasion routes, confirming the role of glacial refugia as centres of genetic diversity over these timescales, and ( b ) that populations in the invaded range are more subdivided genetically than those in the native range of each species. this spatial variation in population structure may be the result of variation in the patchiness of resources exploited by gallwasps, particularly host oak plants

    文摘:生物入侵是不均衡世界的一個永恆話題，尤其是當人類有意或無意地引入物種后.很多引入顯然是無害的，但另外一些則有著嚴重的後果，會給入侵地的生物以至於整個生物群落造成影響.本文總結了分佈區擴張的常見模式，概述了它們對遺傳多樣性和種群結構式樣所造成的影響.描述了如何根據以一批遺傳標記所得到的遺傳多樣性式樣來推斷入侵途徑，來揭示伴隨擴張選擇和漂變在形成種群遺傳樣式中的作用.本文對日益增多的群體遺傳學方法進行了總結，這些技術可以用來在不同的時間尺度上推斷種群規模所發生的巨大變化（瓶頸效應及種群擴張） .最後，我們以歐洲櫟癭蜂（膜翅目，癭蜂科，癭蜂族）一系列入侵的數據為例對一些方法進行了說明.從500 10000年的時間尺度上，多態的等位酶位點上等位基因頻率的數據表明: 1 ）遺傳多樣性沿入侵路線呈不斷下降的趨勢，支持了冰河期避難所作為遺傳多樣性中心的作用; 2 ）入侵地區的種群與該物種原產地的種群相比，遺傳上的分化更為強烈.這種種群結構在空間上的變異可能是被櫟癭蜂開發的資源尤其是櫟樹寄主在斑塊上出現變異的反映
  20. Except for plenty of ammonite fossiles, abundant coccotithophorid is also found but simple species variation. therefore, we put forward that black shale deposition, especially the oil shales may have the relationship with the bloom of coccotithophorid of palaeo - oceanographical phytoplankton

    C n原於比與6 』七toc曲線的變化趨勢一致，說明5 』七toc異常受到有機質組分變化的控制，即受陸源高等植物與海洋水生生物相對輸人量的變化所控制。
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