LI Wendong,JIANG Yue,LI Bo,et al.Intervention Intensity of Human Activity on Potential Natural Vegetation in the Hekouzhen-Longmen Region[J].Research of Soil and Water Conservation,2023,30(05):283-293.[doi:10.13869/j.cnki.rswc.2023.05.051.]
人类活动对河龙区间潜在自然植被的干预强度
- Title:
- Intervention Intensity of Human Activity on Potential Natural Vegetation in the Hekouzhen-Longmen Region
- 文章编号:
- 1005-3409(2023)05-0283-11
- Keywords:
- potential natural vegetation; intervention intensity; comprehensive and sequential classification system; Hekouzhen-Longmen Region; human activity
- 分类号:
- Q948
- 文献标志码:
- A
- 摘要:
- [目的]探究黄河中游河龙区间潜在自然植被(PNV)的时空变化规律,查明人类活动对该区域PNV的干预程度,可为区域生态系统恢复、重建和可持续发展提供理论参考。[方法]基于河龙区间1960—2017年气象数据和1990—2018年4期土地利用数据,利用GIS技术和综合顺序分类系统(CSCS)模拟并分析了河龙区间1960—2017年PNV的时空变化特征,并探讨1990年以来人类活动对PNV的干预强度。[结果]河龙区间稳定的PNV类型按面积由大到小排序为:暖温微干温带典型草原类、暖温微润森林草原类、微温微润草甸草原类、微温微干温带典型草原类。不同年代各PNV类型重心发生不同程度的迁移。土地利用类型以草地、耕地和林地为主。草地、林地、建设用地面积呈增长趋势,而耕地和其他地类呈减少趋势。各地类重心也在不断发生变化。受人类活动影响,草原类PNV的30.9%～36.2%和11.4%～18.5%面积分别转变为耕地和林地,森林草原类PNV的19.0%～32.6%面积转变为耕地,潜在草地区转变为林地的面积比例逐年增加。[结论]人类活动对PNV的干扰动态变化度在1990—2000年和2010—2018年较大,尤其是2010—2018年,且现有林地是否持续存活需要多关注。
- Abstract:
- [Objective] Exploring the temporal and spatial changes of Potential Natural Vegetation(PNV)and identifying the intervention intensity of human activity on PNV in the Hekouzhen-Longmen Region of the middle reaches of the Yellow River can provide a theoretical reference for regional ecosystem restoration, reconstruction and sustainable development. [Methods] Based on meteorological data from 1960 to 2017 and land use data from 1990 to 2018 in the Hekouzhen-Longmen Region, we used GIS technology and Comprehensive and Sequential Classification System(CSCS)model to simulate and analyze the temporal and spatial variation characteristics of PNV in the Hekouzhen-Longmen Region from 1960 to 2017, and explored the intervention intensity of human activity on PNV since 1990. [Results] The stable PNV types in the Hekouzhen-Longmen Region were sorted in descending order of area as follows: Warm temperate-semiarid warm temperate typical steppe, Warm temperate-subhumid forest steppe, Cool temperate-subhumid meadow steppe, Cool temperate-semiarid temperate typical steppe. Different degrees of centroids of PNV types had shifted in different ages. The center of gravity of PNV types had migrated in different degrees in different ages. The land use types were mainly grassland, cultivated land and forestland. The areas of grassland, forestland and construction land showed an increasing trend, while the areas of cultivated land and other land types showed a decreasing trend. The center of gravity of each land use type was also changing. Affected by human activity, 30.9%～36.2% and 11.4%～18.5% of steppe PNV were transformed into cultivated land and forest land respectively, and 19.0%～32.6% of forest-steppe PNV was transformed into cultivated land. The proportion of potential grassland area converted to forestland was increasing year by year, [Conclusion] The dynamic change degree of human activity' interference to PNV was larger in 1990—2000 and 2010—2018, especially in 2010—2018, and more attention should be paid to whether the existing forestland can survive continuously.
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备注/Memo
收稿日期:2022-07-14 修回日期:2022-10-14
资助项目:国家自然科学基金(41807070; U2243210)
第一作者:李文栋(1998—),男,山东沂水人,在读硕士研究生,主要从事生态水文研究。E-mail:lwd19980908@163.com
通信作者:付金霞(1978—),女,甘肃靖远人,博士,副教授,主要从事气候变化、土地利用覆被变化与土壤侵蚀研究。E-mail:fujinxia405@nwsuaf.edu.cn