솔로몬제도에 생육중인 몇 활엽수종의 초식에 대한 방어전략 탐색

Exploring on the Defense Strategies against Hervivory of Several Broad-leaved Tree Species in Solomon Islands

  • 김갑태 (상지대학교 산림과학과)
  • Kim, Gab-Tae (Dept. of Forest Sciences, College of Life Sci. & Resour., Sangji Univ.)
  • 투고 : 2010.08.31
  • 심사 : 2010.10.19
  • 발행 : 2010.10.31

초록

솔로몬제도의 열대우림에서 생육중인 활엽수종들의 초식에 대한 방어전략을 알아보고자 26수종의 잎을 대상으로 domatia 구조와 수, 초식곤충과 포식응애 서식여부 등을 관찰, 조사하였다. Guadalcanal 섬, New Georgia 섬, Tetepare 섬에 생육중인 개체목에서 엽시료를 채취하여 2010년 2월 25부터 3월 5일까지 채집하여 관찰, 조사하였다. 얻어진 결과는 다음과 같다. 총 26종 중에서 Terminalia catappa를 비롯한 6종, 23.08%만이 domatia 구조를 지니고 있었다. 특이하게 Terminalia catappa는 쌈지형(pouch type) domatia와 구덩이-털북숭이형(pit+tuft type) domatia 두 종류가 관찰되었다. 관찰된 포식응애는 Terminalia catappa를 비롯한 세 수종에서만 관찰되었고, 그 개체수도 엽당 0.33~0.40 마리로 정도로 적었다. 수목의 잎을 가해하는 해충은 진딧물, 깍지벌레, 나비목 애벌레, 면충 등이었다. 개미는 진딧물 또는 깍지벌레와 공생관계를 이루고 식물을 가해하고 있었다. 이상의 결과는 남반구에 속하는 Solomon Islands 열대우림의 수목들에서는 domatia가 중재하는 포식성 응애와 수목의 상리공생은 현저하게 적다는 것으로 사료된다.

To explore on the defense strategies against hervivory of broadleaved tree species growing in tropical rain forest, Solomon Islands, morphological characteristics of the leaf, leaf domatia structure and the number, herbivores insects and mites on the leaves of 26 tree species, collected from the trees growing in Guadalcanal, New Georgia, and Tetepare islands, were investigated from Feb. 25 to March 5, 2010. The results are summarized as follows. Six tree species including Terminalia catappa(23.08%) among total 26 species have domatia structure. Especially, domatia of T. catappa reveals two types; pouch type and pit+tuft type. Predatory mites are observed on the leaves of only three species including T. catappa. Predatory mites' number per leaf or leaflet proved a few, 0.33~0.40. Insect pests destroying the leaf of tree species are such as aphids, Diaspididae sp., larva of Lepidoptera, and Eriosoma sp.(Pemphlogidae). Ants are co-works with aphids and Diaspididae sp., and supports herbivores. These results indicate that protective mutualisms between tree and predatory mites may be less frequent in woody species of tropical rain forest in Solomon Islands.

키워드

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