Abstract
The study of land cover changes as well as landscape succession has theoretical and practical significance. Determining the characteristics, causes, and trends of the changes and succession of a landscape allows for assessing the natural and human characteristics of the territory. On this basis, appropriate solutions and policies in resource management, socioeconomic development, and environmental protection are available for each locality. Applying and integrating remote sensing data with field investigations and surveys improves the accuracy and reliability of research results. From the establishment of a land cover change map based on land cover map data collected in 2010, 2015, and 2020, variations in the land cover types of Phu Yen Province were observed. In the period 2010–2015, the area of natural forests and grasslands, shrubs, and bare lands decreased rapidly, whereas the covered areas of intentionally planted forests, industrial trees, and crops increased significantly. The secondary ecological succession of the agroforestry landscape of Phu Yen Province in the last 50–60 years occurred under the strong influence of human activities. Under the impact of chemical warfare and policies and farming practices of the local people, several evergreen broad-leaved tropical forest landscape units have undergone four to six stages of succession, with the interweaving of the economic development policy of Phu Yen Province and farming practices of the local people, making the structure and length of each period and succession very different.
Highlights
Vegetation is essential because it is the primary means of exchanging substances and energy between the hydrosphere, atmosphere, lithosphere, and biosphere on the Earth’s surface (Hu et al, 2010; Piao et al, 2006)
This paper aims to evaluate the land cover change and secondary ecological succession of typical agroforestry landscapes by integrating multitemporal remote sensing data with field survey results and unmanned aerial vehicles
Phu Yen Province promoted the development of agriculture and forestry and mobilized investment capital for afforestation, along with policies to support afforestation by the government of Vietnam
Summary
Vegetation is essential because it is the primary means of exchanging substances and energy between the hydrosphere, atmosphere, lithosphere, and biosphere on the Earth’s surface (Hu et al, 2010; Piao et al, 2006). Under the influence of humans, the forest area and ecosystem are constantly decreasing in terms of area and quality. The management, conservation, and development of forest resources are essential, providing value for agriculture, forestry, tourism, and conservation (Hoi Nguyen Dang et al, 2020; Macdicken, 2015). The protection and sustainable development of landscape and forest ecosystems has become an urgent issue of immediate and long-term significance for many countries and territories, including Vietnam (Hien, 2020)
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