Classification of Standing Types at PT. Work Locations. Sustainable Forest Tusam in Krakap Dusun, Umang Village, Linge District, Central Aceh District

International Journal of Sustainability in Research (IJSR) Vol. 2, No. 1 2024: 177-186 Classification of Standing Types at PT. Work Locations. Sustainable Forest Tusam in Krakap Dusun, Umang Village, Linge District, Central Aceh District Maryam Jamilah1*, Nur Afrida2 Syiah Kuala University, Banda Aceh Corresponding Author: Maryam Jamilah ARTICLEINFO Keywords: Biodiversity, PT. Tusam Sustainable Forest, Important Value Index (INP) Received: 21, November Revised: 22, December Accepted: 31, January ©2024 Jamilah, Afrida: This is an open-access article distributed under the terms of the Creative Commons Atribusi 4.0 Internasional. ABSTRACT PT. Tusam Hutani Lestari is a company with an area of ± 97,300 Ha which has an Industrial Plantation Forest Concession Rights permit number 452/Kpts-11/92 dated 14 May in Aceh Province which is in the districts of Central Aceh, North Aceh, Bener Meriah and Bireuen. With a large working area, the forest area is divided into 6 working blocks, namely the Mount Salak block, Blangkuyu block, Lampahan block, Burni Telong block, Bidin block and Jambu Aye block, making this area have varied biodiversity. This observation aims to determine the diversity of types of stand distribution found on mixed forest land and to determine the value of the important value index (INP) for a type of stand at the PT work site. Tusam Sustainable Forest. The results show that there are 8 types of stands or trees with a total of 17 individuals in the mixed forest area. The dominant important value index (INP) is found in Eucalyptus trees at 60.57% and Pine at 58.66%, while the INP for all plant types in mixed forest area cover is 300% and is included in the high value, and the diversity index for the growth rate of mixed forest land cover shows that the PT Tusam Hutani Lestari work area is included in the medium criteria. DOI: https://doi.org/10.59890/ijsr.v2i1.1268 ( ISSN-E: 3025-7379 https://journal.multitechpublisher.com/index.php/ijsr 177 Jamilah, Afrida INTRODUCTION Based on Law Number 41 of 1999 concerning Forestry, a forest is an ecosystem unit in the form of an expanse of land containing biological natural resources dominated by trees in a natural environment, one of which cannot be separated from the other. Forests are also natural resources that provide great benefits for human welfare, both tangible benefits that are felt directly and intangible benefits that are felt indirectly (Fauzi, 2010). Forests are one of the natural resources that are important for the continuity of human life. Apart from functioning as a habitat for various species of flora and fauna, forests also act as providers of natural resources such as wood, medicines and other nontimber forest products. Apart from that, forests also function as carbon absorbers and provide oxygen needed by humans and other living creatures. Even though they have many benefits, forests are often destroyed and degraded due to human activities such as illegal logging, clearing of agricultural land and mining. This has an impact on reducing the area and quality of forests and threatens the sustainability of the ecosystems within them (Fauzi, 2008). To ensure forest sustainability, good and sustainable forest management efforts need to be made. Forest management includes forest monitoring and supervision activities, developing policies and regulations related to forests, as well as developing technology and innovation in forest management. Therefore, research on forests and their management is very important to maintain the sustainability of forests and the ecosystems within them. This research can be carried out through various methods such as remote sensing, field measurements, and spatial data analysis. By conducting good and sustainable research, it is hoped that solutions can be found to maintain the sustainability of forests and their benefits for human life and other living creatures (Cahyono et al. 2019). LITERATURE REVIEW Biodiversity is all living things on earth that act as indicators and means of ecological systems and species changes. Biodiversity also involves species richness and complex ecosystems so that it can influence communities of organisms, stability and development of ecosystems (Rahayu et al., 2017). Biodiversity is all living creatures such as plants, animals, fungi and microorganisms as well as various genetic materials that exist as well as the diversity of ecological systems where living creatures live (Wati et al., 2016). High species diversity indicates that a community has high complexity because in that community there is high species interaction. So, in a community that has a high diversity of community types, there will be species interactions involving energy transfer (food web), predation, competition and niche division which theoretically is more complex (Soegianto, 1994). Important information that must be available in forest management is biodiversity, trees can be used as a parameter of biodiversity in an ecosystem. A tree is a stand that dominates a forest, and functions as a producer organism and a residence for various types of animals (Wahyudi 2014). Trees use sunlight to carry out photosynthesis, so they can adapt CO2 and H2O to produce chemical energy in the form of carbohydrates and release 178 International Journal of Sustainability in Research (IJSR) Vol. 2, No. 1 2024: 177-186 oxygen which living creatures use for the respiratory process. Tree diversity can be used as an indicator of community level, stating that community structure and tree diversity can also be used to measure community stability, namely the strength of a community to maintain a stable ecosystem despite disturbances to its components (Indriyanto, 2006). This observation aims to determine the diversity of types of stand distribution found on mixed forest land and to determine the value of the important value index (INP) for a type of stand at the PT work site. Tusam Sustainable Forest. METHODOLOGY The study was carried out from January 2023 to February 2023. The study location was in Central Aceh Regency, Linge District, Umang Village and Krakap Hamlet, precisely in one of PT's working areas. Tusam Sustainable Forest. The materials and tools used are forest areas which are standing areas planted by PT. Tusam Sustainable Forest. The methods used in this study were preparation, data collection and data analysis. 1. Preparation: The initial step that can be taken is preparation, such as determining the data collection location that suits the needs for implementing skills practice, and then carrying out initial observations and assessments at the data collection location. The next step is selecting the equipment needed, such as meters, roll meters, and Global Positioning. System (GPS), stationery, machete, camera, scissors, calculator and the materials used in this research were raffia rope and observation sheets (Tally sheet). 2. Data Collection: When collecting data, what is needed (...truncated)