Leaf production of an overstorey rainforest tree and its effects on the temporal distribution of associated insect herbivores
Leaf production of an overstorey rainforest tree and its effects on the temporal distribution of associated insect herbivores
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上层雨林树的叶子产量及其对相关昆虫食草动物时间分布的影响
DOI：
10.1007/bf00320813
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发表时间：
1991
期刊：
影响因子：
2.7
通讯作者：
Y. Basset
中科院分区：
文献类型：
--
作者：
Y. Basset
在澳大利亚布里斯班附近的亚热带雨林中，对一种热带雨林冠层树Argyrodendron actinophyllum（Sterculiaceae）的寄主物候和食虫动物的时间分布进行了3年和2年的监测。该常绿树种的产叶在个体间是同步的，产叶时间为10月至2月，但某些速生树种的产叶时间在年份间存在显著差异。大多数草食性物种选择性地以嫩叶为食，因此，只在嫩叶可利用的“窗口期”发生，除了一些偏爱成熟树叶的叶肉食性动物。快速生长的树木在叶片密集生产期间维持较高的草食动物活动，但一些生长缓慢的树木，其幼叶的可用性似乎更稳定和可预测，也长期支持较高的草食动物活动。在研究年份，特定树木的寄主适宜性取决于叶片生产强度和其他未知因素，并且对于通才和专门性食草动物是不同的。某些特殊的物种，如木虱，能够克服在旺盛的a上不同年份间年轻树叶的变化。放线素茶树以营养和生殖分生组织为食。大多数数据表明，在这种昆虫-植物系统中，幼叶的可用性是一个重要因素。
The host phenology and temporal distribution of insect herbivores associated with a rainforest canopy tree,Argyrodendron actinophyllum(Sterculiaceae), were monitored for 3 and 2 years respectively in an Australian subtropical rain forest near Brisbane. Leaf production of this evergreen species was synchronous among individuals, occurring from October to February, but differed markedly between years for some fast-growing trees. Most herbivore species fed selectively upon young leaves and, consequently, occurred only during “windows” of young foliage availability, with the exception of some mesophyll-feeders that preferred mature foliage. Fast-growing trees sustained high herbivore activity during periods of intense leaf production but some slow-growing trees, whose availability of young foliage appeared to be more constant and predictable, also supported high herbivore activity in the long term. Host suitability of particular trees during study years was dependent upon the intensity of leaf production and other unidentified factors, and was different for generalist and specialist herbiovores. Certain specialist species, such as psyllids, were able to overcome the changing availability of young foliage between years on vigorousA. actinophyllumtrees by feeding upon both vegetative and reproductive meristems. Most of the data suggest that availability of young foliage is an important factor in this insect-plant system.