宽叶蓝靛果在不同海拔分布的生物多样性分析

Analysis of Biodiversity of the Broad Leaf Lonicera edulis at Different Elevations

蓝靛果忍冬是我国具有重要经济价值的浆果资源,而宽叶蓝靛果是蓝靛果中较为特殊的品种,具有很高的研究价值。为研究宽叶蓝靛果物种多样性的垂直变化效应,进一步揭示在不同海拔梯度中宽叶蓝靛果群落的结构稳定性,在小兴安岭伊春林区以600、1 000、1 400 m三个海拔梯度为基础,共设临时样地7块,计算种群内重要值及各相关指数。结果表明:(1)海拔600m群落灌木层多样性指数为各海拔区域数值最高。海拔1 400 m群落多样性指数为各海拔梯度最低。(2)海拔1 000~1 400 m,丰富度指数总体处于0.11~0.12,没有梯度变化。(3)群落主要伴生树种以蔷薇科树种居多,多以东北珍珠梅与宽叶蓝靛果伴生形成稳定群落结构。

Lonicera edulis is a berry species in China and has significant economic value. The broad leaf Lonicera edulis is a special species of berry of high research value. In order to study the vertical variation of the species diversity of broad leaf Lonicera edulis and further reveal the structural stability of its community at different elevations, seven temporary sample plots were established in Yichun Forest Region in Xiao Hinggan Mountains at 600 m, 1 000 m, and 1 400 m respectively to calculate importance values and relative indexes within the community. The results showed that community diversity index at 600m shrub layer is the highest within all altitude regions, while the one at 1 40 0 m is the lowest; the richness index is generally between 0. 11 ~0. 12 with no gradient change in the altitude range of from 1 000 m to 1 400 m. The main species of the community is Rosaceae and most of the northeast Sorbaria sorbifolia associated with broad leaf Lonicera edulis to form a stable community structure.