Host compatibility interacts with seed dispersal to determine smallscale distribution of a mistletoe in Xishuangbanna,Southwest China  

作　　者：Yahuang Luo Yi Sui Jianmin Gan Ling Zhang 

机构地区：[1]Key Laboratory of Tropical Forest Ecology,Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Mengla,Yunnan 666303,China [2]University of Chinese Academy of Sciences,No.19A Yuquan Road,Beijing 100049,China

出　　处：《Journal of Plant Ecology》2016年第1期77-86,共10页植物生态学报（英文版）

基　　金：National Science Foundation of China(31170406);the key project of the Chinese Academy of Science(KSCX2-EW-Q-17);Queensland—Chinese Academy of Sciences(QCAS)Biotechnology Fund(GJHZ1130).

摘　　要：Aims Mistletoe infection between intra- and interspecific hosts can be restricted by seed dispersal, host–mistletoe compatibility and other factors, yet few studies have linked seed dispersal and seedling establishment together for understanding mistletoe plant distribution and demography together in different anthropogenic disturbance forest types at a local scale. The objectives of this study were to examine how three factors—seed disperser behavior, post-dispersal host compatibility and canopy cover—affect the spatial distribution of a generalist mistletoe Dendrophthoe pentandra (Loranthaceae) in plantation and rainforest within Xishuangbanna, Southwest China.MethodsWe observed mistletoe D. pentandra infection patterns at the scale of individual trees and sixteen 400-m2 forest plots in adjacent plantation and rainforest within Xishuangbanna. To elucidate what determines infection patterns at different scales and in different forest types, we observed the behavior of major avian seed dispersers and carried out a seed inoculation experiment to examine how post-dispersal compatibility and light incidence affect the infection of different hosts.Important FindingsDendrophthoe pentandra displayed an aggregated distribution and infected 10 species in our study site, with a significantly higher infection prevalence and intensity in the plantation than in the tropical forest. Different seed dispersers provided contrasting initial mistletoe templates: the specialist frugivore Dicaeum concolor (plain flowerpecker) preferred to fly between mistletoes in infected trees in the plantation and likely intensified existing infections. In contrast, the dietary generalist Pycnonotus jocosus(red-whiskered bulbul) was more likely to visit uninfected trees, thereby establishing new infections. Thus, seed dispersal appears to be an important determinant of the mistletoes distribution, with deposition patterns providing an initial distribution template and determining small-scale patterns. However, post-dispersal and abiotic fa

关 键 词：aggregation FRUGIVORY establishment seedling survival host-parasite interaction 

分 类 号：S71[农业科学—林学]