Changes in landscape disturbance degree of steep slope land use in Guizhou Province from 1995 to 2015

doi:10.3969/j.issn.1000-2006.201907009

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2020, Vol. 44 ›› Issue (4): 183-190.doi: 10.3969/j.issn.1000-2006.201907009

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Changes in landscape disturbance degree of steep slope land use in Guizhou Province from 1995 to 2015

GAO Hongjuan¹(), HAN Huiqing²(), LIU Yue², WANG Tiangui², BAI Yumei², MA Shuliang², CHEN Siying²

^1.College of Geography and Resources, Guizhou Normal College, Guiyang 550018, China
^2.College of Architecture and Urban Planning, Guizhou Institute of Technology, Guiyang 550003, China

Received:2019-07-05 Revised:2019-10-08 Online:2020-07-22 Published:2021-07-09
Contact: HAN Huiqing E-mail:cgp1963@126.com;hhuiqing2006@126.com

Abstract

Abstract: Objective

Land use landscapes on steep slopes are an important part of the development and utilization of land resources in mountainous areas. These are heavily disturbed by human activities, which strongly affect the stability and security of this landscape. In order to rationally use and protect the steep slope land resources, it is necessary to study the disturbance degree of human activities in this landscape.

Method

The spatial and temporal changes of land use landscape disturbance degree on steep slopes in Guizhou Province from 1995 to 2015 were analyzed based on the landscape disturbance index using the spatial analysis tool of ArcGIS software.

Result

The disturbance degree of landscape types for forestland, shrub, grassland, built-up land and unused land, except farmland and water body, increased from 1995 to 2005, while the disturbance degree of all landscape types decreased from 2005 to 2015. Except for a small part of the eastern region and the central-western region, the disturbance degree on steep slope landscape increased in most areas of Guizhou Province from 1995 to 2005, which resulted in the aggravation of soil erosion. Howe?ver, the disturbance degree on steep slope landscapes decreased in most areas of Guizhou Province from 2005 to 2015, except for southeastern region and a small part of the western region, which restrained soil erosion. Landscape fragmentation, separation and disturbance in Guizhou Province were positively correlated with soil erosion, while landscape dominance was negatively correlated with soil erosion from 1995 to 2015 in Guizhou Province.

Conclusion

Changes in landscape of farmland, forestland, shrub and grassland under the disturbance of population growth and ecological management are important factors resulting in changes in the degree of landscape disturbance on steep slopes in Guizhou Pro?vince. There is a significant correlation between landscape disturbance and soil erosion.

Key words: land use, steep slope, soil erosion, landscape disturbance, spatio-temporal pattern, Guizhou Province

CLC Number:

F301. 2

GAO Hongjuan, HAN Huiqing, LIU Yue, WANG Tiangui, BAI Yumei, MA Shuliang, CHEN Siying. Changes in landscape disturbance degree of steep slope land use in Guizhou Province from 1995 to 2015[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2020, 44(4): 183-190.

Figures/Tables 7

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景观类型 landscape pattern	斑块面积/hm² patch area			变化率/% change rate		斑块数量/个 patch number			变化率/% change rate
景观类型 landscape pattern	1995	2005	2015	1995—2005	2005—2015	1995	2005	2015	1995—2005	2005—2015
耕地farmland	476 308	489 281	479 766	2. 72	-1. 94	236 645	240 242	232 112	1. 52	-3. 38
有林地forestland	579 655	584 644	600 000	0. 86	2. 63	101 612	103 249	105 155	1. 61	1. 85
灌木林shrub	1 380 973	1 375 211	1 371 040	-0. 42	-0. 30	295 172	298 690	293 085	1. 19	-1. 88
草地grassland	523 423	511 927	498 280	-2. 20	-2. 67	132 533	130 506	124 647	-1. 53	-4. 49
水域water body	3 653	3 862	9 502	5. 73	146. 03	1 627	1 719	2 797	5. 65	62. 71
建设用地built-up land	1 446	1 230	6 381	-14. 92	418. 56	996	1 002	3 727	0. 60	271. 96
未利用地unused land	1 204	587	1 765	-51. 29	200. 81	264	200	603	-24. 24	201. 50

景观类型 landscape type	年份 year	景观破碎度C_i landscape fragmentation	C_i变化率/% change rate of G_i		景观分离度S_i landscape separation	S_i变化率/% change rate of S_i		景观优势度D_i landscape dominance	D_i变化率/% change rate of D_i
景观类型 landscape type	年份 year	景观破碎度C_i landscape fragmentation	1995—2005	2005—2015	景观分离度S_i landscape separation	1995—2005	2005—2015	景观优势度D_i landscape dominance	1995—2005	2005—2015
耕地farmland	1995	0. 497	-1. 17	-1. 47	0. 880	-1. 91	0. 24	0. 407	0. 66	-0. 71
	2005	0. 491			0. 863			0. 410
	2015	0. 484			0. 865			0. 407
有林地 forestland	1995	0. 175	0. 74	-0. 76	0. 474	-0. 06	-1. 66	0. 378	0. 28	1. 00
	2005	0. 177			0. 473			0. 379
	2015	0. 175			0. 465			0. 383
灌木林 shrub	1995	0. 214	1. 62	-1. 58	0. 339	1. 02	-0. 64	0. 579	-0. 12	-0. 14
	2005	0. 217			0. 342			0. 578
	2015	0. 214			0. 340			0. 577
草地 grassland	1995	0. 253	0. 68	-1. 87	0. 599	1. 46	0. 41	0. 381	-0. 78	-0. 92
	2005	0. 255			0. 608			0. 378
	2015	0. 250			0. 610			0. 375
水域water body	1995	0. 445	-0. 06	-33. 87	9. 509	-2. 77	-48. 16	0. 146	5. 93	9. 58
	2005	0. 445			9. 246			0. 155
	2015	0. 294			4. 793			0. 170
建设用地 built-up land	1995	0. 689	18. 27	-28. 30	18. 796	17. 91	-62. 82	0. 169	4. 34	24. 71
	2005	0. 815			22. 164			0. 177
	2015	0. 584			8. 239			0. 220
未利用地 unused land	1995	0. 219	55. 39	0. 27	11. 622	78. 53	-42. 25	0. 034	-15. 06	22. 78
	2005	0. 341			20. 749			0. 028
	2015	0. 342			11. 982			0. 035

景观类型 landscape type	干扰度 disturbance degree			变化率/% change rate
景观类型 landscape type	1995	2005	2015	1995—2005	2005—2015
耕地 farmland	0. 594	0. 587	0. 584	-1. 26	-0. 53
有林地 forestland	0. 304	0. 305	0. 303	0. 30	-0. 66
灌木林 shrub	0. 325	0. 327	0. 325	0. 74	-0. 64
草地 grassland	0. 383	0. 386	0. 383	0. 76	-0. 65
水域 water body	3. 105	3. 028	1. 619	-2. 48	-46. 53
建设用地 built-up land	6. 017	7. 092	2. 802	17. 87	-60. 50
未利用地 unused land	3. 603	6. 401	3. 773	77. 67	-41. 06

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Changes in landscape disturbance degree of steep slope land use in Guizhou Province from 1995 to 2015

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