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生态学杂志 ›› 2020, Vol. 39 ›› Issue (11): 3596-3604.doi: 10.13292/j.1000-4890.202011.029

• 研究报告 • 上一篇    下一篇

鄂西桑寄生植物多样性的海拔格局

合展1,周友兵2,高瑞如1*   

  1. 1山西师范大学生命科学学院, 山西临汾 041000;2中国科学院植物研究所, 植被与环境变化国家重点实验室, 北京 100093)
  • 出版日期:2020-11-11 发布日期:2021-05-10

Diversity of mistletoes along elevation gradient in western Hubei.

HE Zhan1, ZHOU You-bing2, GAO Rui-ru1*   

  1. (1College of Life Science, Shanxi Normal University, Linfen 041000, Shanxi, China; 2State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China).
  • Online:2020-11-11 Published:2021-05-10

摘要: 桑寄生植物(桑寄生科)的分布与寄主选择性和生境相关。本研究沿海拔梯度(175~3106 m)设置3条样带共292个样方(20 m×20 m),调查了鄂西亚热带森林群落中桑寄生的分布,记录桑寄生植物多样性。结果表明:在研究区内共调查到7种桑寄生科植物,40种寄主植物;桑寄生植物分布的最低海拔是194 m,最高海拔是2011 m;物种多样性在海拔梯度上先上升后下降,相对集中分布在海拔600~1000 m范围内,呈现单峰分布格局;不同桑寄生科植物在不同寄主植物上的寄生强度不同,更偏好选择高大的落叶乔木作为寄主;桑寄生科植物在鄂西地区海拔梯度上呈“中度膨胀”(mid-elevation peak)的分布格局,可能与寄生植物偏好性及寄主多样性有关。

关键词: 桑寄生, 多样性, 海拔梯度, 中度膨胀, 寄生选择性

Abstract: The distribution of mistletoe species (Loranthaceae) correlates to specific host plants and habitats. Here, we investigated the distribution of mistletoe species over 292 plots (20 m×20 m) of subtropical forest community with three transects along an elevation gradient (175-3106 m) in western Hubei. Results showed that there were seven species parasitizing 40 different host plant species. Mistletoes were distributed between the elevation of 194 m and 2011 m. Species diversity increased and then decreased with increasing elevation, and concentrated from 600 m to 1000 m, showing a unimodal pattern. The parasitic intensity of different mistletoes on host plants depended on specific species, with mistletoes being generally found on the tall deciduous trees. The “mid-elevation peak” in mistletoe diversity was observed along the elevation gradient in western Hubei, which may be related with host availability and diversity.

Key words: mistletoe, diversity, elevation gradient, mid-elevation peak, host selectivity.