Study on Forest Landscape Fragmentation of Puzhehei Provincial Nature Reserve based on MSPA

doi:10.13466/j.cnki.lyzygl.2020.03.009

Abstract

Abstract:

Based on the forest distribution map of 10 m spatial resolution in 2006 and 2016,the forest in Puzhehei Provincial Nature Reserve of Qiubei,Yunan Province,was divided into 7 types of fragmentation.By using morphological spatial pattern analysis method,the index of forest fragmentation was established to explore the characteristics and changes of forest fragmentation in the reserve.The results show that:from 2006 to 2016,the forest landscape of the reserve has changed greatly and the proportion of various patches in the forest area has increased.The core and edge patches are the main compositions of the forest,while the proportion of island,perforation,connecting bridge,ring and branch patches is relatively small.In the reserve,the forest integrity is enhanced,the edge effect is reduced,the connectivity and the spread are enhanced.The characteristics of forest fragmentation in each functional area are different.The degree of fragmentation in the core area is low,while in the experimental area is just the opposite.The forest in buffer area has better connectivity and spread.Evergreen broad-leaved forest landscape is the most fragmented vegetation type,with many islands and large edge effect,which should be protected and restored.

Key words: nature reserve, morphological spatial pattern, forest fragmentation, vegetation landscape, Puzhehei

CLC Number:

HUANG Xiaoyuan, YE Yuanhui, ZHANG Zhuoya, WANG hongsong, CHEN Yalin. Study on Forest Landscape Fragmentation of Puzhehei Provincial Nature Reserve based on MSPA[J]. FOREST RESOURCES WANAGEMENT, 2020, (3): 44-51.

Figures/Tables 6

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破碎指标	公式	生态意义
ICore	核面积/森林面积	森林内部可用生境
IPerforated	孔面积/森林面积	森林内部边缘效应影响
IIslet	岛面积/森林面积	孤立的非核心生境或潜在的踏脚石
IBridge	桥面积/森林面积	森林内部生境的结构连通性
IBranch	枝面积/森林面积	森林物质能量交换最大范围
IEdges	(边+孔+桥+枝+环)面积/森林面积	边缘生境与边缘效应对森林生境的影响

斑块类型	2006年			2016年
斑块类型	占森林面积比/%	占保护区面积比/%	斑块数量/个	占森林面积比/%	占保护区面积比/%	斑块数量/个
小核心	11.12	3.14	306	11.29	4.05	379
中核心	12.19	3.45	20	11.14	4.00	21
大核心	47.84	13.52	6	48.86	17.53	6
岛屿	0.11	0.03	10	0.26	0.09	21
穿孔	0.46	0.13	6	0.57	0.20	14
边缘	23.72	6.71	417	21.53	7.72	628
环	0.14	0.04	16	0.51	0.18	70
连接桥	1.47	0.42	145	1.93	0.69	196
分枝	2.95	0.83	1304	3.91	1.40	2253
合计	100	28.27	2230	100	35.86	3588

年份	区域	ICore	IPerforated	IIslet	IBridge	IBranch	IEdges
2006	核心区	82.39	1.01	0.00	0.53	1.81	17.61
	缓冲区	64.40	0.08	0.29	2.47	4.10	35.31
	实验区	64.64	0.17	0.00	1.56	2.38	35.36
	保护区	71.36	0.46	0.11	1.50	2.79	28.53
2016	核心区	82.04	0.63	0.09	1.32	2.27	17.87
	缓冲区	66.67	0.68	0.42	2.76	5.13	32.91
	实验区	65.29	0.34	0.24	1.70	3.37	34.47
	保护区	71.52	0.57	0.25	1.97	3.67	28.22
2006—2016 变化	核心区	-0.35	-0.38	0.09	0.79	0.45	0.26
	缓冲区	2.28	0.59	0.12	0.29	1.03	-2.40
	实验区	0.65	0.18	0.24	0.14	1.00	-0.89
	保护区	0.16	0.11	0.15	0.48	0.87	-0.31

植被	ICore	IPerforated	IIslet	IBridge	IBranch	IEdges
暖性针叶林	62.40	0.18	0.70	2.77	5.83	36.90
常绿阔叶林	41.52	0	4.12	4.22	13.18	54.36
落叶阔叶林	75.56	0.23	0	0.39	2.28	24.44
灌丛	68.32	0.46	0.35	1.63	3.56	31.33