Research on Boundary Definition and Plant Community Diversity of wetland-grassland Ecotone —A case study:Siertan Wetland in Ningxia

doi:10.13466/j.cnki.lyzygl.2017.01.012

Abstract

Abstract:

In order to study boundary definition and plant diversity of wetland-grassland ecotone in Yanchi country,Ningxia,vegetation investigation was carried out in July,2014.The moving split-window technique was applied to the quantitative determination of ecotone and diversity indexes(species diversity index,community dominant concentration index,community evenness index,species richness index)were used to analyze plant community diversity.The results showed:(1)When window width was 6 quadrats,it can clearly delineate the ecotone boundary;The ecotone boundary of east,west,south,north line transect is 120m,120m,120m,140m respectively and distance from core area of wetland is 180m,220m,240m,200m respectively;(2) species diversity index,community evenness index,species richness index of the four transect lines all followed the order of ectone>arid region>wet region,while community dominant concentration index was in such an order as arid region>ectone>wet region;(3)The species diversity index,community dominant concentration index,community evenness index of north line transect were higher,but four diversity indexes of west line transect were lower.The results can provide theoretical support and scientific basis for the protection of valuable wetland resources,the maintenance of biological diversity and the stability of ecological system in arid and semi-arid regions.

Key words: ecotone, moving split-window technique, plant community diversity

CLC Number:

S718.55
Q948

SU Xiangling, WANG Zhenxi. Research on Boundary Definition and Plant Community Diversity of wetland-grassland Ecotone —A case study:Siertan Wetland in Ningxia[J]. FOREST RESOURCES WANAGEMENT, 2017, 0(1): 63-69.

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样线	生境带	H	C	Jsw		Ma
E	湿生带	0.60	0.41	0.81		0.16
	交错带	3.46	0.83	1.04		3.97
	旱生带	2.29	0.87	0.82		2.29
W	湿生带	0.31	0.17	0.45		0.16
	交错带	2.46	0.88	0.84		3.05
	旱生带	2.39	0.89	0.78		2.69
S	湿生带	1.22	0.59	0.68	0.75
	交错带	2.73	0.88	0.85	4.27
	旱生带	2.58	0.91	0.76	3.75
N	湿生带	1.28	0.54	0.62	1.09
	交错带	2.71	0.88	0.86	3.29
	旱生带	2.56	0.90	0.84	3.05

样线	H	C	Jsw	Ma
E	2.75	0.89	0.80	3.83
W	2.31	0.84	0.71	3.27
S	2.84	0.91	0.78	4.84
N	2.93	0.92	0.82	4.44