Friday Laurie E
Department of Applied Biology, University of Cambridge, Pembroke Street, CB2 3DX, Cambridge, UK.
Oecologia. 1989 Aug;80(2):272-277. doi: 10.1007/BF00380163.
Utricularia vulgaris growing at Wicken Fen, England, showed rapid turnover of the trapping apparatus. New groups of leaves, each bearing many traps, were produced at a rate of 1.4-2.8 groups per day from April to September, 1987. Old leaves decayed at a comparable rate, so that individual leaves survived for less than 50 days. In July, trapping efficiency of individual bladders was greatest between 1 and 6 days of age and then declined rapidly. Very few traps more than 19 days old could capture prey and most were lost from the leaves within 32 days. The lifespan of traps was closely related to their size and position on the leaves. Because of the rapidity of changes in trap condition with age, trap age is a vital consideration in any studies of the functional ecology of U. vulgaris.
生长在英国威肯沼泽地的普通狸藻，其捕虫器周转迅速。1987年4月至9月期间，每天以1.4 - 2.8组的速度长出新的叶片群，每组叶片带有许多捕虫器。老叶以类似的速度腐烂，因此单个叶片存活时间不到50天。7月时，单个囊状体的捕虫效率在1至6日龄时最高，之后迅速下降。超过19日龄的捕虫器很少能捕获猎物，大多数在32天内从叶片上脱落。捕虫器的寿命与其大小和在叶片上的位置密切相关。由于捕虫器状况随年龄变化迅速，在普通狸藻功能生态学的任何研究中，捕虫器的年龄都是至关重要的考虑因素。
