|
門派: 殺豬拔毛派(萌主)
資料:   
威望: 0
魅力:   
經驗:   
來自: 萌萌異境 
發文: 7334 篇
精華: 0 篇
在線: 733 時 35 分 50 秒
註冊: 2001/12/06
|
|
 Message  查看  搜尋  通訊錄  複製  引用  回覆 | [第 18 樓] |
|
| | title
Patterns of prey capture and prey availability among populations of the carnivorous plant Pinguicula moranensis (Lentibulariaceae) along an environmental gradient
abstract
In this study we explored the effect of the physical environment and the availability of prey (biomass and taxonomic composition) on the patterns of prey capture and reproduction on five populations of Pinguicula moranensis (Lentibulariaceae) in areas ranging from pine–oak forests to desert scrublands. Environmental variation was summarized using principal factor analysis. Prey availability and prey capture increased toward the shadiest, most humid, and fertile population. The probability of reproduction and average bud production per population did not follow the same tendency because both fitness components peaked at the middle of the environmental gradient. These results suggest that the benefits derived from carnivory are maximized at sites fulfilling a trade-off between light, moisture, and prey availability. We also found that the taxonomic composition of both the available prey and that of the prey captured by plants varied among populations. The results also indicated that the prey captured by plants are not a random sample of prey available within populations. Overall, the results from this study revealed a marked amount of heterogeneity in the physical and biotic environment among the populations of P. moranensis, which has the potential to affect the outcome of the interaction between this carnivorous species and its prey.
source
American Journal of Botany. 2003;90:1341-1348.
link
http://www.amjbot.org/cgi/content/abstract/90/9/1341?maxtoshow=&HITS=10&hits=10&RESULTformAT=&searchid=1138081797550_3041&FIRSTINDEX=0&sortspec=relevance&volume=90&firstpage=1341&journalcode=amjbot
標題
沿著環境梯度的食蟲植物P. moranensis族群之間其獵物捕捉與獵物獲得性的模式
摘要
在本研究中，我們探究在一個由松樹和橡樹混成的森林到荒漠灌木叢林地的區域之間，其物理環境與獵物獲得性(生物量和物種組成)對五個P. moranensis的族群在獵物捕捉與繁殖模式上的影響。我們以主要因子分析法來概述環境變化。獵物的可得性與獵物捕捉與最大遮蔭處、最大溼度和豐富的獵物族群成正相關性。植物繁殖與每個族群的平均芽生成量之機率並不遵循相同的趨勢，因為這兩個適配要素在環境梯度的中間達到高峰。這些結果意味著當某地具有光照、溼度與獵物可得性之間的交易時，食蟲植物可獲得最大的利益。我們也發現，可獲得的獵物與被植物捉到的獵物之物種組成在捕蟲蓳族群之間有所不同。這結果亦指出了被植物捕捉的獵物並非為族群之中可抓到的獵物中的隨機樣品。總結來說，從這篇研究所得到的結果顯示在P. moranensis族群之間的物理及生物環境中一個明顯的數量上的異質性，其具有潛力來影響食蟲植物與獵物間交互作用的結果。
| | |
|
|
|
|
 2006/01/26 08:51pm  IP: 已設定保密 | [本文共 2754 位元組]  |
| |
頂端 
加到"我的最愛"
主題管理：
總固頂 
取消總固頂 
