種群密度 的英文怎麼說

中文拼音 [zhǒngqúnmìdù]
種群密度 英文
population density
  • 種 : 種名詞（姓氏） a surname
  • 群 : Ⅰ名詞（聚在一起的人或物） crowd; group Ⅱ量詞（用於成群的人或物） group; herd; flock
  • 密 : Ⅰ名詞1 （秘密） secret 2 [紡織] （密度） density 3 （姓氏） a surname Ⅱ形容詞1 （距離近; 空隙小）...
  • 度 : 度動詞[書面語] （推測; 估計） surmise; estimate
  1. 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。
  2. The population density is evened out.

    種群密度亦趨于均勻化。
  3. Studies by hargrave and geen estimated natural community graz - ing rates by measuring feeding rates of individual zooplankton species in the laboratory and then computing community grazing rates for field conditions using the known population density of grazers

    由哈格雷夫（ hargrave ）和吉恩（ geen ）所進行的研究，對自然條件下的群落食草比例進行了估計，其手段是通過測量出實驗室內單獨的浮遊動物種類的結食比例，然後利用已知的食草動物種群密度，計算出實地狀況下的群落食草比例。
  4. On the other hand, the sites with no stone, id est pure grass and pure shrubbery, had no distribution of cathaica cavimargo. only a single empty shell was found on the site of pure grass

    分佈有石灰石或花崗石的樣地種群密度最大，無石頭分佈的純草地和純灌木沒有cathaicacavimargo分佈，純草地只見到一枚空殼。
  5. Density - dependent effects of the experimental population of spider mite schizotetranychus bambusae reck acari tetranychidae

    竹裂爪蟎實驗種群密度效應研究
  6. Objective by investigating papulation density and breeding characters of dengue vectors in fuzhou changle international airport to prevent and control dengue fever

    摘要目的調查長樂國際機場登革熱媒介種群密度，預防和控制登革熱暴發流行。
  7. Endophytic bacteria were recovered in tobacco roots at mean population densities ranging from 2. 0xl04to 1. 0xl08cfu / g - fw

    煙草整個生育期內生細菌種群密度：根中2
  8. Forested areas sustain almost as high a population as the agricultural sites.

    森林區的種群密度幾乎與農業區的一樣高。
  9. The dispersal pattern of dendrolimus punctatus adults was studied in youxi county with the mark - release - recapture methods

    摘要應用標記釋放回捕技術，按照動態分析方法，對馬毛松毛蟲成蟲在林間的種群密度及種群消長動態變化進行了研究。
  10. Population estimation of purple swamphen porphyrio porphyrio in haifeng, guangdong

    廣東海豐紫水雞種群密度調查
  11. A low population is not sufficient to halt a decline.

    低的種群密度不足以立即阻止種群下降。
  12. A study on the density effect model of rare and endangered tsuga longibracteata population

    珍稀瀕危植物長苞鐵杉種群密度效應模型
  13. Presently, almost all optimal harvesting policies were obtained by choosing production function that was separable of variables concerning x and e and was independent of time t. this is not completely consistent with the objective facts

    目前，幾乎所有的最優捕獲策略，都是在生產函數對種群密度ｘ和單位捕獲努力量e可分離假定條件下得到的，或生產函數與時間變量t無關假定條件下得到的，這與客觀事實不盡相符
  14. The equilibrium population density is equivalent to the carrying capacity k

    平衡種群密度與環境容納量k值相等。
  15. Study on density - dependent effects of the experimental population of tetranychus urticae koch acari : tetranychidae

    二斑葉蟎的實驗種群密度效應研究
  16. Population density : gaps > ridge gaps > no - gaps ; population frequency : gaps > ridge gaps > no - gaps

    種群密度：林隙山脊林隙非林隙。種群出現頻率：林隙山脊林隙非林隙。
  17. Relationship between the population density of schizotetranychus nanjingensis with the bamboo output and the determination of economic threshold

    南京裂爪蟎種群密度與新竹產量的關系及經濟閾值的研究
  18. Gap disturbance had different effects on the density, frequency, distribution of size class, spatial distribution pattern, radial growth pattern of neolitsea aurata var. glauca population

    林隙干擾對縉雲山白毛新木姜子種群密度、頻度、徑級分佈、空間分佈格局、徑向生長都有不同程度影響。
  19. Quorum sensing is the regulation of gene expression in response to fluctuations in cell - population density and allows populations of bacteria to synchronize group behaviors

    群體感應（ quorumsensing ， qs ，又稱閾值敏感）是細菌根據種群密度大小進行細胞內或細胞間信息交流，協調群體行為並調控基因表達的一種方式。
  20. For ecological system, the state of the system in a moment will be influenced by the state in history as well as by the relation of species at that moment, say, the influence of time delay, and so if we consider it, we will be more precisely in discribe the change and development of the system ; on the other hand, the population of species may be distributed in different patchs because of the influences of envionment or artificial element, this made us had to consider not only the time element but also the spatial element, said the diffusion of species

    對于生態系統而言，系統在某時刻的狀態（即種群密度的增長率）不僅受到當時各種群間關系的影響，也應當受到歷史的制約，也即是時滯效應的影響，因而在生態系統中考慮時滯因素，將能更正確的描述系統的變化于發展；另一方面，由於環境或人為因素的影響而使種群的分佈呈現一定的區域性，這就使得我們在對其進行研究時不僅要考慮時間因素，更應該考慮空間因素，即種群間的擴散效應。
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