Does insect folivory vary with latitude among temperate deciduous forests?

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• 作者：Yangjian Zhang (1)
  Jonathan Adams (2)
  Dehai Zhao (3)
  
• 关键词：Community ; Folivory ; Herbivore ; Latitude ; North America ; Temperature
• 刊名：Ecological Research
• 出版年：2011
• 出版时间：March 2011
• 年：2011
• 卷：26
• 期：2
• 页码：377-383
• 全文大小：365KB
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• 作者单位：Yangjian Zhang (1)
  Jonathan Adams (2)
  Dehai Zhao (3)
  
  1. Lhasa Plateau Ecosystem Research Station, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
  2. Department of Biological Sciences, Seoul National University, Gwanak-Gu, Seoul, 151-742, Republic of Korea
  3. Warnell School of Forestry and Natural Resources, The University of Georgia, Athens, GA, 30602, USA
  

文摘

There is a widespread belief that warmer climate forests suffer more folivory, as a proportion of leaf area, than cooler climate forests. However, there is a need for closely standardized studies to test this assumption. In this study, we estimated total folivory as percentage area damaged in freshly fallen, undecayed autumn leaves from the forest floor during the lifetime of deciduous tree leaves, using scanner-linked software. Over a period of 2?years, 154 samples were taken at 96 forested localities in eastern North America, spanning 17° of latitude. In terms of percentage area damage per leaf, the results in both years sampled suggest that there is significantly more damage in warmer, lower latitude areas of eastern North America. The decreasing folivory rate is higher in northern than in southern regions. The observations of a latitudinal trend may suggest that ‘biotic-interaction is indeed more important in warmer temperate climates compared to cool temperate climates.