SUCCESSION AND STRATIFICATION OF AQUATIC INSECTS INHABITING LEAVES OF INSECTIVOROUS PITCHER PLANT, SARRACENIA-PURPUREA
SUCCESSION AND STRATIFICATION OF AQUATIC INSECTS INHABITING LEAVES OF INSECTIVOROUS PITCHER PLANT, SARRACENIA-PURPUREA
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DOI：
10.2307/2424941
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发表时间：
1978-01-01
影响因子：
0.6
通讯作者：
HALL, DW
中科院分区：
文献类型：
--
作者：
FISH, D;HALL, DW
采用温室试验和野外采集相结合的方法，研究了3种植物的生态关系。双翅目，Blaesoxipha fletcheri（Aldrich）（麻蝇科），Wyeomyia smithii（Coquillett）（蚊科）和Metriocnemus knabi Coquillett（摇蚊科），它们栖息在猪笼草的消化液中。只有新开放的叶子才能主动吸引和捕捉昆虫。随着叶子的老化，昆虫受害者慢慢分解，叶液pH值降低。由于猪笼草的叶子年龄不同，每片叶子捕捉昆虫的能力和被捕获昆虫的分解程度都不同。叶子上昆虫居民的相对丰度取决于叶子的年龄，因为每种昆虫在不同的分解阶段消耗捕获的昆虫遗骸。B的浮游幼虫。Fletcheri以新捕获的漂浮在水面上的昆虫为食。当受害者腐烂时，自由游动的W。史密氏幼虫滤食悬浮颗粒物。在叶室底部积累的昆虫残骸为M. knabi。虽然所有3个spp。它们以捕获的昆虫的残骸为食，它们在不同的时间和叶子的不同层次上这样做。
Greenhouse experiments and field collections were used in investigating the ecological relationships of 3 spp. of Diptera, Blaesoxipha fletcheri (Aldrich) (Sarcophagidae), Wyeomyia smithii (Coquillett), (Culcicdae) and Metriocnemus knabi Coquillett (Chironomidae), which inhabit the digestive fluid of the pitcher plant. Only newly opened leaves actively attract and capture insects. As the leaves age, the insect victims slowly decompose and the leaf fluid pH is lowered. Since the leaves of a pitcher plant are of different ages, each leaf differs in its ability to capture insects and in the degree of decomposition of its captured insects. The relative abundance of the insect inhabitants of a leaf depends upon the leaf age, because each insect species consumes captured insect remains at different stages of decomposition. The buoyant larvae of B. fletcheri feed upon newly captured insects floating upon the surface. As the victims decompose, free-swimming W. smithii larvae filter-feed upon the suspended particulate matter. Accumulated insect remains on the bottom of the leaf chamber provide food for M. knabi. Although all 3 spp. feed upon the remains of captured insects, they do so at different times and at different strata within the leaves.