Demographic-and-Anthropogeomorphic-based Geodiversity Hotspot for Regional Geoconservation Area Selection: Study on Jogja Aspiring Geopark and its Geosites, Indonesia Anugrah Aditya Insani, Didit Hadi Barianto
Universitas Gadjah Mada
Abstract
Geodiversity hotspots are a quantitative assessment to select areas in urgent need of geoconservation, primarily using the geodiversity index and threat index. Some previous studies have modified the threat index by adding, removing, or even replacing sub-threat indices. Population density, representing demographic dynamics, and anthropogenic intervention, reflecting anthropogeomorphic dynamics, can be included as sub-threat indices. Both illustrate the processes of socio-economic systems that threaten geoecosystems, in this case, geodiversity. This research aims to assess geodiversity hotspots to identify areas requiring regional geoconservation, focusing on the Jogja Aspiring Geopark and its geosites. Involved data includes geopark and geosites boundary, geological lithology, tectonics and structures, landform systems, surface hydrology, hydrogeology, soil order, population density per km2, and anthropogenic intervention. Geodiversity and threat data were assessed at a 1:50,000 scale with a 0.5 km2 grid. Results demonstrate geodiversity hotspots within the Jogja Geopark, highlighting areas urgently needing regional geoconservation. The Kartamantul (Yogyakarta - Sleman - Bantul) metropolitan area and surrounding geosites require the most attention. This indicates that the processes and outcomes of socio-economic systems actively threaten geoecosystems, particularly the relatively passive geodiversity.
