生物多样性 ›› 2019, Vol. 27 ›› Issue (3): 273-285. DOI: 10.17520/biods.2018258
李强1,王彬1,邓云2,林露湘2,达佤扎喜1,张志明1,*()
收稿日期:
2018-09-25
接受日期:
2019-01-16
出版日期:
2019-03-20
发布日期:
2019-01-31
通讯作者:
张志明
基金资助:
Li Qiang1,Wang Bin1,Deng Yun2,Lin Luxiang2,Dawa Zhaxi1,Zhang Zhiming1,*()
Received:
2018-09-25
Accepted:
2019-01-16
Online:
2019-03-20
Published:
2019-01-31
Contact:
Zhang Zhiming
摘要:
林窗作为森林群落中一种重要的干扰方式, 对林下物种构成有着重要的影响。开展林窗空间格局及其特征指数与林下植物多样性关系研究对于探讨林窗对林下生物多样性的影响有重要意义, 有助于进一步了解群落动态, 在物种多样性保护方面也具有指导作用。本研究在西双版纳热带雨林地区随机选取3块大小为1 ha的热带雨林为研究样地, 采用轻小型六旋翼无人机搭载Sony ILCE-A7r可见光传感器, 分别获取各个样地的高清数字影像, 结合数字表面高程模型以及各个样地的地形数据用以确定各样区的林窗分布格局, 并进一步提取出各林窗的景观格局指数。结合地面样方基础调查数据, 对各样地各林窗下植物多样性情况进行统计, 旨在分析热带雨林林窗空间分布格局以及林窗下植物多样性对各林窗空间格局特征的响应情况。研究表明, 西双版纳州热带雨林林窗呈大而分散的空间分布, 林窗空间格局特征指数如林窗形状复杂性指数、林窗面积都与林下植物多样性呈显著正相关关系。在面积小的林窗下, 较之林窗形状复杂性因子, 林窗面积大小对林下植物多样性影响更显著; 在面积达到一定程度后, 相对于面积因子, 林窗形状复杂性指数对林下植物多样性影响更显著, 各样地林窗皆趋于向各自所处样地顶极群落发展。
李强, 王彬, 邓云, 林露湘, 达佤扎喜, 张志明 (2019) 西双版纳热带雨林林窗空间分布格局及其特征数与林窗下植物多样性的相关性. 生物多样性, 27, 273-285. DOI: 10.17520/biods.2018258.
Li Qiang, Wang Bin, Deng Yun, Lin Luxiang, Dawa Zhaxi, Zhang Zhiming (2019) Correlation between spatial distribution of forest canopy gaps and plant diversity indices in Xishuangbanna tropical forests. Biodiversity Science, 27, 273-285. DOI: 10.17520/biods.2018258.
图1 研究区概况图。图中各颜色边框均为样地内1 ha范围, 且各颜色对应作图各采样点位置。
Fig. 1 Map of the four sample locations in this study. Each color border in the figure is within 1 hectare of the sample land, and each color corresponds to the position of sampling points in the drawing.
44 km样地 44 km plot | 茶厂后山样地 Tea factory backhill plot | 勐仑水库样地 Menglun Reservoir plot | 大平掌样地 Dapingzhang plot | |
---|---|---|---|---|
大林窗数 Large gap number | 13 | 9 | 12 | 21 |
小林窗数 Small gap number | 27 | 18 | 14 | 32 |
林窗数 Gap number | 40 | 27 | 26 | 53 |
最大林窗面积 Largest gap area (m2) | 294.26 | 121.78 | 266.42 | 160.53 |
最小林窗面积 Smallest gap area (m2) | 4.1 | 4.64 | 4.17 | 4.2 |
林窗总面积 Total area of gap (m2) | 1,208.72 | 600.00 | 1,286.91 | 1,640.25 |
林窗空隙率 Gap fraction | 12.10% | 6% | 12.85% | 16.40% |
表1 4个样地的林窗数据
Table 1 Data of the canopy gaps of four forest plots
44 km样地 44 km plot | 茶厂后山样地 Tea factory backhill plot | 勐仑水库样地 Menglun Reservoir plot | 大平掌样地 Dapingzhang plot | |
---|---|---|---|---|
大林窗数 Large gap number | 13 | 9 | 12 | 21 |
小林窗数 Small gap number | 27 | 18 | 14 | 32 |
林窗数 Gap number | 40 | 27 | 26 | 53 |
最大林窗面积 Largest gap area (m2) | 294.26 | 121.78 | 266.42 | 160.53 |
最小林窗面积 Smallest gap area (m2) | 4.1 | 4.64 | 4.17 | 4.2 |
林窗总面积 Total area of gap (m2) | 1,208.72 | 600.00 | 1,286.91 | 1,640.25 |
林窗空隙率 Gap fraction | 12.10% | 6% | 12.85% | 16.40% |
44 km样地 44 km plot | 茶厂后山样地 Tea factory backhill plot | 勐仑水库样地 Menglun Reservoir plot | 大平掌样地 Dapingzhang plot | ||
---|---|---|---|---|---|
数量比例 Quantity ratio | 小林窗 Small gap | 67.50% | 66.70% | 53.80% | 60.40% |
大林窗 Large gap | 32.50% | 33.30% | 46.20% | 39.60% | |
面积比例 Area ratio | 小林窗 Small gap | 24% | 30.10% | 14.10% | 23.30% |
大林窗 Large gap | 76% | 69.90% | 85.90% | 76.70% | |
空隙率 Gap fraction | 小林窗 Small gap | 2.90% | 1.80% | 1.81% | 3.80% |
大林窗 Large gap | 9.20% | 4.20% | 11.05% | 12.60% | |
平均最小邻近距离 Mean Euclidean near- neighbor distance (ENN) | 林窗 Gap | 10.80 | 10.02 | 11.11 | 8.49 |
小林窗 Small gap | 11.45 | 9.74 | 16.28 | 9.57 | |
大林窗 Large gap | 17.16 | 17.89 | 18.82 | 14.18 |
表2 4个样地的林窗空间特征指数
Table 2 Spatial characteristic index of the canopy gaps of four forests
44 km样地 44 km plot | 茶厂后山样地 Tea factory backhill plot | 勐仑水库样地 Menglun Reservoir plot | 大平掌样地 Dapingzhang plot | ||
---|---|---|---|---|---|
数量比例 Quantity ratio | 小林窗 Small gap | 67.50% | 66.70% | 53.80% | 60.40% |
大林窗 Large gap | 32.50% | 33.30% | 46.20% | 39.60% | |
面积比例 Area ratio | 小林窗 Small gap | 24% | 30.10% | 14.10% | 23.30% |
大林窗 Large gap | 76% | 69.90% | 85.90% | 76.70% | |
空隙率 Gap fraction | 小林窗 Small gap | 2.90% | 1.80% | 1.81% | 3.80% |
大林窗 Large gap | 9.20% | 4.20% | 11.05% | 12.60% | |
平均最小邻近距离 Mean Euclidean near- neighbor distance (ENN) | 林窗 Gap | 10.80 | 10.02 | 11.11 | 8.49 |
小林窗 Small gap | 11.45 | 9.74 | 16.28 | 9.57 | |
大林窗 Large gap | 17.16 | 17.89 | 18.82 | 14.18 |
图3 4个样地的林窗形状指数和面积空间分布。44 km: 44 km样地; CC: 茶厂后山样地; DPZ: 大平掌样地; SK: 勐仑水库样地。
Fig. 3 Shape index and area spatial distribution of the four forest canopy gaps. 44 km, 44 km plot; CC, Tea factory backhill plot; SK, Menglun Reservoir plot; DPZ, Dapingzhang plot.
分类面积 Classified by area (m2) | 林窗数量 No. of gaps | 数量百分比 % | 面积 Area (m2) | 面积百分比 % |
---|---|---|---|---|
热带雨林 Tropical forest | ||||
4-25 | 59 | 63.44 | 648.99 | 20.96 |
25-50 | 19 | 20.43 | 588.53 | 19.01 |
50-100 | 8 | 8.60 | 541.68 | 17.50 |
100-200 | 4 | 4.30 | 523.73 | 16.92 |
200-400 | 3 | 3.23 | 792.7 | 25.61 |
合计 Total | 93 | 100 | 3,095.63 | 100 |
常绿阔叶林 Evergreen broad-leaved forest | ||||
4-25 | 32 | 60.38 | 382.3 | 23.31 |
25-50 | 10 | 18.87 | 375.9 | 22.92 |
50-100 | 9 | 16.98 | 599.19 | 36.53 |
100-200 | 2 | 3.77 | 282.81 | 17.24 |
200-400 | 0 | 0 | 0 | 0 |
合计 Total | 53 | 100.00 | 1,640.2 | 100.00 |
表3 热带雨林和常绿阔叶林样地的林窗数量、面积及其比例
Table 3 The numbers and area of the canopy gaps of the tropical forest plots and the evergreen broad-leaved forest plot
分类面积 Classified by area (m2) | 林窗数量 No. of gaps | 数量百分比 % | 面积 Area (m2) | 面积百分比 % |
---|---|---|---|---|
热带雨林 Tropical forest | ||||
4-25 | 59 | 63.44 | 648.99 | 20.96 |
25-50 | 19 | 20.43 | 588.53 | 19.01 |
50-100 | 8 | 8.60 | 541.68 | 17.50 |
100-200 | 4 | 4.30 | 523.73 | 16.92 |
200-400 | 3 | 3.23 | 792.7 | 25.61 |
合计 Total | 93 | 100 | 3,095.63 | 100 |
常绿阔叶林 Evergreen broad-leaved forest | ||||
4-25 | 32 | 60.38 | 382.3 | 23.31 |
25-50 | 10 | 18.87 | 375.9 | 22.92 |
50-100 | 9 | 16.98 | 599.19 | 36.53 |
100-200 | 2 | 3.77 | 282.81 | 17.24 |
200-400 | 0 | 0 | 0 | 0 |
合计 Total | 53 | 100.00 | 1,640.2 | 100.00 |
图4 4个样地林窗下与林下植物的个体数和种数(样地代号同图3)
Fig.4 Number of plant individuals and species under the canopy gaps and under the forests in the four plots. Plot codes are the same as Fig.3.
样地 Samples | 物种丰富度 Species richness | Shannon-Wiener指数 Shannon-Wiener index | Simpson指数 Simpson index | |||
---|---|---|---|---|---|---|
最大值 Max. | 均值 Mean | 最大值 Max. | 均值 Mean | 最大值 Max. | 均值 Mean | |
44 km | 145 | 10.35 | 3.3698 | 1.2404 | 0.959 | 0.5742 |
茶厂后山样地 CC | 67 | 10.8519 | 3.0483 | 1.7553 | 0.9417 | 0.7731 |
大平掌样地 DPZ | 34 | 3.1132 | 2.8178 | 0.5582 | 0.9291 | 0.2868 |
勐仑水库样地 SK | 164 | 28.2692 | 3.0656 | 1.8432 | 0.9452 | 0.7233 |
表4 4个样地林窗下植物的多样性指数
Table 4 Plant diversity indices under the canopy gaps of four forest plots. 44 km, 44 km plot; CC, Tea factory backhill plot; SK, Menglun Reservoir plot; DPZ, Dapingzhang plot.
样地 Samples | 物种丰富度 Species richness | Shannon-Wiener指数 Shannon-Wiener index | Simpson指数 Simpson index | |||
---|---|---|---|---|---|---|
最大值 Max. | 均值 Mean | 最大值 Max. | 均值 Mean | 最大值 Max. | 均值 Mean | |
44 km | 145 | 10.35 | 3.3698 | 1.2404 | 0.959 | 0.5742 |
茶厂后山样地 CC | 67 | 10.8519 | 3.0483 | 1.7553 | 0.9417 | 0.7731 |
大平掌样地 DPZ | 34 | 3.1132 | 2.8178 | 0.5582 | 0.9291 | 0.2868 |
勐仑水库样地 SK | 164 | 28.2692 | 3.0656 | 1.8432 | 0.9452 | 0.7233 |
图7 热带雨林林窗下植物物种丰富度与林窗形状复杂性指数(MSI)的线性关系图(样地代号同图3)
Fig. 7 Linear relationship between species richness and shape index (MSI) of the rainforest canopy gaps. Plot codes are the same as Fig.3.
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