Topographic gradient effect and ecological zoning of ecosystem services in Heihe River Basin

doi:10.7522/j.issn.1000-694X.2022.00102

Journal of Desert Research ›› 2023, Vol. 43 ›› Issue (2): 139-149.DOI: 10.7522/j.issn.1000-694X.2022.00102

Topographic gradient effect and ecological zoning of ecosystem services in Heihe River Basin

Kexin Du¹(), Fuping Zhang¹(), Qi Feng², Yongfen Wei³, Jiawei Yang¹

^1.School of Geography and Tourism，Shaanxi Normal University，Xi'an 710119，China
^2.Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，China
^3.River Basin Research Center，Gifu University，Gifu 501-1193，Japan

Received:2022-06-09 Revised:2022-08-12 Online:2023-03-20 Published:2023-04-12
Contact: Fuping Zhang

Abstract

Abstract:

Heihe River Basin is an important barrier for ecological security in Northwest China. It is of great significance to clarify the gradient effect of ecosystem services in this region for formulating differentiated ecological protection policies. Based on the methods of InVEST model and CASA model， this study quantified ecosystem services by using multi-source remote sensing data in 2018 in Heihe River Basin， and then analyzed gradient effects of ecosystem services from four aspects of elevation， slope， relief amplitude and terrain index， divided ecological regions according to the topography distribution index at last. The results shows that：（1） The space distributions of water production， soil conservation， vegetation carbon sequestration and food supply are obviously different in Heihe River Basin， high value areas mainly in the upstream， low value areas widely distributed in the downstream. （2） The ecosystem services exist obviously hierarchy distribution on various landform gradient， overall have the trend of increasing first and then decreasing with the terrain gradient levels increase. （3） The distributions of multiple ecosystem services important zones are different， and overall the importance of ecosystem services zones are increasing with the increase of terrain gradient levels. （4） Based on the terrain distribution rules， Heihe River Basin can be divided into area of core ecological reserve， area of mountain ecological improvement， area of sustainable development and ecological protection area.

Key words: ecosystem services, topographic gradient, ecological zoning, Heihe River Basin

CLC Number:

X171.1

Kexin Du, Fuping Zhang, Qi Feng, Yongfen Wei, Jiawei Yang. Topographic gradient effect and ecological zoning of ecosystem services in Heihe River Basin[J]. Journal of Desert Research, 2023, 43(2): 139-149.

Figures/Tables 12

References 33

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级别	海拔/m	坡度/（°）	地形起伏度	地形位指数
1	<1 700	0~2	0~5	<0.363
2	1 700~2 500	2~6	5~15	0.363~0.587
3	2 500~3 300	6~15	15~45	0.587~0.900
4	3 300~3 800	15~25	45~140	0.900~1.198
5	>3 800	>25	>140	1.198~1.972

级别	海拔/m	坡度/（°）	地形起伏度	地形位指数
1	<1 700	0~2	0~5	<0.363
2	1 700~2 500	2~6	5~15	0.363~0.587
3	2 500~3 300	6~15	15~45	0.587~0.900
4	3 300~3 800	15~25	45~140	0.900~1.198
5	>3 800	>25	>140	1.198~1.972

多重生态系统服务重要区分级	海拔梯度分级
多重生态系统服务重要区分级	1级	2级	3级	4级	5级
非重要区	1.242	0.728	0.081	0.033	0.033
一般重要区	0.440	2.976	1.022	1.238	4.907
中度重要区	0.439	1.736	4.248	2.637	2.769
高度重要区	0.001	1.843	5.479	5.413	4.453
极度重要区	0.000	0.107	3.457	9.300	4.788

多重生态系统服务重要区分级	海拔梯度分级
多重生态系统服务重要区分级	1级	2级	3级	4级	5级
非重要区	1.242	0.728	0.081	0.033	0.033
一般重要区	0.440	2.976	1.022	1.238	4.907
中度重要区	0.439	1.736	4.248	2.637	2.769
高度重要区	0.001	1.843	5.479	5.413	4.453
极度重要区	0.000	0.107	3.457	9.300	4.788

多重生态系统服务重要区分级	坡度梯度分级
多重生态系统服务重要区分级	1级	2级	3级	4级	5级
非重要区	1.181	1.018	0.412	0.123	0.108
一般重要区	0.578	0.879	1.794	2.982	4.246
中度重要区	0.634	0.817	2.248	2.844	3.099
高度重要区	0.276	1.196	3.486	4.253	3.772
极度重要区	0.025	0.723	4.647	6.317	4.990

Topographic gradient effect and ecological zoning of ecosystem services in Heihe River Basin

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References 33

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多重生态系统服务重要区分级	地形起伏度梯度分级
多重生态系统服务重要区分级	1级	2级	3级	4级	5级
非重要区	1.198	1.178	1.059	0.389	0.099
一般重要区	0.658	0.516	0.816	1.700	3.854
中度重要区	0.686	0.587	0.713	2.306	3.041
高度重要区	0.018	0.401	1.048	3.631	3.958
极度重要区	0.002	0.020	0.457	4.860	5.592

多重生态系统服务重要区分级	地形起伏度梯度分级
多重生态系统服务重要区分级	1级	2级	3级	4级	5级
非重要区	1.198	1.178	1.059	0.389	0.099
一般重要区	0.658	0.516	0.816	1.700	3.854
中度重要区	0.686	0.587	0.713	2.306	3.041
高度重要区	0.018	0.401	1.048	3.631	3.958
极度重要区	0.002	0.020	0.457	4.860	5.592

多重生态系统服务重要区分级	地形位指数梯度分级
多重生态系统服务重要区分级	1级	2级	3级	4级	5级
非重要区	1.279	1.135	0.352	0.078	0.069
一般重要区	0.367	0.762	2.110	1.754	4.499
中度重要区	0.150	0.959	3.199	2.559	3.041
高度重要区	0.000	0.266	3.942	5.402	3.836
极度重要区	0.000	0.004	1.582	7.363	5.544

多重生态系统服务重要区分级	地形位指数梯度分级
多重生态系统服务重要区分级	1级	2级	3级	4级	5级
非重要区	1.279	1.135	0.352	0.078	0.069
一般重要区	0.367	0.762	2.110	1.754	4.499
中度重要区	0.150	0.959	3.199	2.559	3.041
高度重要区	0.000	0.266	3.942	5.402	3.836
极度重要区	0.000	0.004	1.582	7.363	5.544