Morphological correlates of necromass accumulation in the traps of an Eastern tropical pitcher plant, Nepenthes ampullaria Jack, and observations on the pitcher infauna and its reconstitution following experimental removal
Morphological correlates of necromass accumulation in the traps of an Eastern tropical pitcher plant, Nepenthes ampullaria Jack, and observations on the pitcher infauna and its reconstitution following experimental removal
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DOI：
10.1007/s004420050390
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发表时间：
1998-02-01
期刊：
影响因子：
2.7
通讯作者：
Cresswell, JE
中科院分区：
文献类型：
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作者：
Cresswell, JE
我研究了陷阱的形态，necromass积累率和猪笼草动物群的东部热带猪笼草，壶腹猪笼草，生长在'kerangas'石楠林在双溪英溪保护区，文莱。我调查了分布在35种植物中的164个猪笼草，并从猪笼草中提取了尸体和幼虫的底栖动物，然后在14天后重新采样猪笼草内容物。植物的形态变化显着的投手，在他们的每投手的necumass积累率和在丰富和组成的投手infaunas。平均而言，投手积累了11.5毫克干重超过14天，但较大的投手比较小的积累了更多的坏死。猪笼草形态可以解释植物间坏死物积累变异的45%。平均而言，投手最初包含26.3个单独的幼虫inquilines。幼虫底栖动物由9种双翅目幼虫和罕见的无尾类蝌蚪组成。这10个类群从未发现在同一个投手和平均物种丰富度每投手为4.0。在可以评估的六个分类群中，除了Toxorhynchites spp.在投手中有传染性分布。投手形态和necumass积累解释只有15%的植物之间的inquiline丰富的变化。我发现，几乎没有证据表明存在的密度依赖的相互作用inquiline物种：偏相关分析检测到只有一个统计上显着的成对关系之间的丰度inquiline类群，这是一个积极的协会。在被清空14天后，投手平均包含9.6条inquilines。有没有证据表明，物种组成的底栖动物dronising每个投手是相关的，其前去除底栖动物。
I studied the trap morphology, necromass accumulation rates and pitcher infauna of an eastern tropical pitcher plant, Nepenthes ampullaria, that grew in 'kerangas' heath forest in the Sungei Ingei Conservation Area, Brunei. I surveyed 164 pitchers distributed among 35 plants and extracted the necromass and larval infauna from the pitchers and then resampled the pitcher contents after 14 days. Plants varied significantly in the morphology of their pitchers, in their rate of necromass accumulation per pitcher and in the abundance and composition of the pitcher infaunas. On average, pitchers accumulated 11.5 mg dry weight over 14 days, but larger pitchers accumulated more necromass than smaller ones. Pitcher morphology explained 45% of the variation in necromass accumulation among plants. On average, pitchers initially contained 26.3 individual larval inquilines. Collectively, the larval infauna was composed of nine taxa of dipteran larvae and infrequent anuran tadpoles. These ten taxa were never found together in a single pitcher and the mean species richness per pitcher was 4.0. Of the six taxa that could be assessed, all except Toxorhynchites spp. had a contagious distribution among the pitchers. Pitcher morphology and necromass accumulation explained only 15% of the variation in inquiline abundance among plants. I found little evidence for the existence of density-dependent interactions between inquiline species: a partial correlation analysis detected only one statistically significant pairwise relationship between the abundances of inquiline taxa, which was a positive association. Fourteen days after being emptied, pitchers contained an average of 9.6 inquilines. There was no evidence that the species composition of the infauna recolonising each pitcher was related to that of its pre-removal infauna.