動植物關係的取食偏好與個體表現——以跨海拔分佈的專食性植食動物與寄主植物為例

Preference and Performance in Plant–Herbivore Interactions across Altitude — A Study on a Specialist Herbivore and its Host Plant

林靖倫(Chinh Lun Lin)

指導教授 ： 何傳愷

國立臺灣大學/生命科學院/生態學與演化生物學研究所/碩士(2016年)

https://doi.org/10.6342/NTU201601111

摘要

無資料

關鍵字

海拔 ； 動植物關係 ； 取食偏好 ； 植食動物表現 ； 適應

並列摘要

The relationship between herbivore feeding preference for host plants and herbivore performance is central to the study of plant–herbivore interactions. While the correlation and causation between herbivore preference and performance have been documented in latitudinal systems, little is known in altitudinal systems. To help fill up this knowledge gap, this altitudinal study tested four hypotheses: 1) Field herbivores, regardless of altitudinal origin, will show a feeding preference for higher-altitude plants. In other words, higher-altitude plants have a higher palatability. 2) Field plant traits will suggest a higher plant quality for herbivores at higher altitude, helping explain the altitudinal variation in plant palatability. 3) Accordingly, field herbivore performance (body size) increases with altitude, implying a link between field preference and performance. 4) A laboratory factorial experiment will support the causative link between preference and performance. Herbivores will perform better on plants collected from higher altitude (biotic factor), regardless of herbivore growth temperature (abiotic factor) or adaptation, if exists. Focusing on a specialist herbivore (Altica birmanensis) and its host plant (Polygonum chinense L.) at low vs. medium altitude (100 vs. 1000 m) in Taiwan, this study found a correlation between field herbivore preference and performance across altitude, consistently with latitudinal systems. In specific, field herbivores preferred higher-altitude plants. This higher preference (or plant palatability) was associated with the variation in field plant traits across altitude. Furthermore, the variation in field plant traits also correlated with field herbivore performance across altitude (larger body size at higher altitude). However, the correlation between field herbivore preference and performance across altitude was not supported by the laboratory experiment, in contrast to latitudinal systems. In specific, the laboratory results showed that an abiotic factor (temperature) was the most important factor affecting herbivore performance, compared to a biotic factor (plants with different palatability across altitude) or herbivores’ adaptation to abiotic or biotic factors. This suggests that while latitudinal and altitudinal systems share similar temperature gradients, the patterns of plant–herbivore interactions in each system could be driven by different factors.

並列關鍵字

altitude ； plant–herbivore interaction ； preference ； performance ； adaptation

參考文獻

Taiwan Typhoon and Flood Research Institute, National Applied Research Laboratories. (2014). Data Bank for Atmospheric and Hydrologic Research [Hourly weather data 2005 - 2014]. Retrieved from https://dbahr.narlabs.org.tw.

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