We constructed fences using 2 x 2 x 2 factorial design to examine the effect patterns of food availability, predation and interspecific competition on population dynamics and spatial behavior of reed voles, microtusfortis. we expected to test two hypothesises : ( 1 ) availability of high quality food, predation and interspecific competition have independent and addictive effects on population system dynamics for small mammalia herbivore ; ( 2 ) availabiliry of high quality food could reduce home range and aggressive behavior level between individuals of microtine, predation and interspecific competition have independent effects on spatial behavior of microtine
以2 2 2析因實驗設計,在野外圍欄條件下,探討食物可利用性、捕食及種間競爭對沼澤田鼠( microtusfortis )種
群動態及空間行為的作用,旨在檢驗下述特定假設: ( 1 )高質量的食物可利用性、捕食及種間競爭對植食性小哺乳
動物種
群系統
動態具有獨立的和累加的效應; ( 2 )高質量的食物可利用性可降低田鼠個體間的攻擊行為水平,並導致其巢區減小;捕食與種間競爭對田鼠的空間行為亦有獨立的作用。
Dynamical systems examples from mathematical biology and population dynamics
來自生物數學和種
群動力學的
動力系統的例子。
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
Insect population dynamics has always received much attention.
昆蟲種
群動態的研究一直受到重視。
By quantifying these causes the population dynamics of the insect would be better understood.
通過對這些原因進行定量,可以更好地了解昆蟲的種
群動態。
Population dynamics of tryporyza incertulas and its control methods
三化螟種
群動態分析及防治
This paper briefly reviews the possible effects of climate change on avian biology and ecology all over the world, with emphasis on new findings from several long - term studies in europe and north america, which provide unique opportunities to investigate how long - term changes in climate affect birds at both individual and population levels
根據全球范圍內氣候變化對鳥類影響的研究資料,尤其是北美和歐洲的一些長期研究項目的成果,綜述了氣候變化對鳥類分佈范圍、物候、繁殖和種
群動態變化等方面的可能影響。
Egg in diapause or not : logit ( p ) = - 41. 832 + 1. 422x1 ( sea - water temperature ) + 0. 509x2 ( photoperiod ) ; female laying diapause eggs or not : logit ( p ) = - 89. 001 + 6. 611x ( photoperiod ) the former reflected the effect of environmental conditions on the amount of diapause eggs of this species in xiamen waters, and it is important to study the population dynamics of this species in this area ; while the latter reflected the effect of envi ronmental conditions on inducing the female of this species to lay diapause eggs, and it is important to research the diapause inducers of this species in this area and the physiological mechanism of diapause
卵是否滯育: logit ( p ) = - 41 . 832 + 1 . 422x _ 1 (海水溫度) + 0 . 509x _ 2 (日照時間) ;雌體是否產滯育卵: logit ( p ) = - 89 . 001 + 6 . 611x (日照時間) 。前者反映的是海區環境對整個廈門海區該種類滯育卵多寡的影響,對于研究本海區該種類的種
群動力學有著重要意義;後者反映的是海區環境對該種類雌體產滯育卵的誘導作用,對于研究誘導該種類在本海區滯育的環境因子和生理機制具有重要意義。
Through the introducing the conception of " animal behavior logic " in behavior animation, the concerted control scheme that combined the high - level uncertainly goal - directed behavior and lower - lever predefined behavior was established, and the imu1ation experiment was carried on taking the fish group animation as an example
通過在行為
動畫中引入「
動物行為邏輯」的概念,給出了高層非確定性目標導向行為與低層確定性預定義行為相結合的協調控制方案,並以魚
群動畫為例進行了模擬實驗。
Through interpreting the tm images and extracting the forest coverage of hetian district, the cutting of simulation maps was completed with the help of arcgis software, and the a. cinerarius population distribution in concrete forest patchs was thus displayed
通過tm衛片解譯提取和田地區森林圖層,在arcgis中完成對插值模擬圖的切割,從而把春尺蠖種
群動態的年際分佈顯示在具體的森林斑塊內。
Research on the egrets mixed population in xiamen egret natural reserve found that the reserve and its extending area provided the population fitting conditions through winter. the dominating component is little egret ( elpetta garzetta ) and there were some large egret ( egretta alba ), cattle egret ( bubulcus ibis ) and few chinese egret ( egrtta eulophotes )
2000 2001年,對廈門白鷺自然保護區的鷺類種
群動態研究表明,保護區及其周邊地區為鷺類種
群提供了優良的越冬條件,越冬鷺
群主要包括白鷺和少量牛背鷺與大白鷺,偶見黃嘴白鷺。
Dynamics of sophora davidii population in a hilly region closed for thirty years in loess plateau
黃土高原丘陵溝壑區封禁30年前後狼牙刺種
群動態研究
Effects of elevated atmospheric co2 concentrations on population dynamics of thewheat aphid, rhopalosiphum padi
大氣二氧化碳濃度變化對禾穀縊管蚜種
群動態的影響
The effect of environmental factors on the population dynamics of brachionus calyciflorus
環境因子對萼花臂尾輪蟲種
群動態的影響
Research on dynamic mechanism and evelution of financial service industrial clusters
金融服務產業集
群動因及其演進研究
Population dynamics and structure of wood mice apodemus sylvaticus in the set aside area around the farmland
農田生態保留帶中小林姬鼠的種
群動態和結構
The dynamics in different stages : the populations were significant difference in different stages to a certain extent in seven tobacco cultivars, while the flora was not significant difference
不同栽培時期煙草植株中內生細菌種群動態:七個試驗品種在各個栽培時期帶菌量有時表現顯著差異。