文献类型：期刊文献

英文题名：Defense pattern of Chinese cork oak across latitudinal gradients: influences of ontogeny, herbivory, climate and soil nutrients

作者：Wang, Xiao-Fei[1] Liu, Jian-Feng[1] Gao, Wen-Qiang[1] Deng, Yun-Peng[1] Ni, Yan-Yan[1] Xiao, Yi-Hua[2] Kang, Feng-Feng[3] Wang, Qi[4] Lei, Jing-Pin[1] Jiang, Ze-Ping[1]

通信作者：Liu, JF[1]

机构：[1]Chinese Acad Forestry, State Key Lab Tree Genet & Breeding, Key Lab Tree Breeding & Cultivat, State Forestry Adm,Res Inst Forestry, Beijing 100091, Peoples R China;[2]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Guangdong, Peoples R China;[3]Beijing Forestry Univ, Coll Forestry, Beijing 100083, Peoples R China;[4]Guangdong Inst Ecoenvironm & Soil Sci, Guangdong Key Lab Agr Environm Pollut Integrated, Guangzhou 510650, Guangdong, Peoples R China

年份：2016

卷号：6

外文期刊名：SCIENTIFIC REPORTS

收录：;Scopus(收录号：2-s2.0-84973349070);WOS:【SCI-EXPANDED(收录号:WOS:000376873000003)】；

基金：We thank the local forest working station of Moping in Zigui County, Zigui Forestry Bureau, the local forest working station of Gaofeng in Cili County, the BaoTianMan forest ecosystem research station in Neixiang, Henan, the state-owned forest farm of Dagouhe in Jiyuan County, China, for logistic assistance. We thank Angela Moles and Mai-He Li for their helpful comments and suggestions on the manuscript. All experimental work was funded by the Natural Science Foundation of China (NSFC, No. 41371075).

语种：英文

摘要：Knowledge of latitudinal patterns in plant defense and herbivory is crucial for understanding the mechanisms that govern ecosystem functioning and for predicting their responses to climate change. Using a widely distributed species in East Asia, Quercus variabilis, we aim to reveal defense patterns of trees with respect to ontogeny along latitudinal gradients. Six leaf chemical (total phenolics and total condensed tannin concentrations) and physical (cellulose, hemicellulose, lignin and dry mass concentration) defensive traits as well as leaf herbivory (% leaf area loss) were investigated in natural Chinese cork oak (Q. variabilis) forests across two ontogenetic stages (juvenile and mature trees) along a similar to 14 degrees-latitudinal gradient. Our results showed that juveniles had higher herbivory values and a higher concentration of leaf chemical defense substances compared with mature trees across the latitudinal gradient. In addition, chemical defense and herbivory in both ontogenetic stages decreased with increasing latitude, which supports the latitudinal herbivory-defense hypothesis and optimal defense theory. The identified trade-offs between chemical and physical defense were primarily determined by environmental variation associated with the latitudinal gradient, with the climatic factors (annual precipitation, minimum temperature of the coldest month) largely contributing to the latitudinal defense pattern in both juvenile and mature oak trees.