COMPARISON OF CARBON STOCK BASED ON EXISTING LAND COVER AND SPATIAL PATTERN PLANS IN GILI MATRA

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INTRODUCTION
Gili Matra is a group of islands whose economic activities are dominated by tourism (Selvia et al., 2024).The Gili Matra increasingly known to both domestic and non-domestic tourists (Tisna et al., 2019).In   Another problem is that the Detailed Spatial Plan (RDTR) on Gili Matra was compiled after the land conversion had already taken place massively.As a result, the existence of protected zones that function as ecosystem balancers and carbon stores is reduced.The zones designated as protected zones have various stands of vegetation that absorb CO2 in the atmosphere (Rawung, 2015).
If land conversion continues, the ability of a land cover to absorb carbon will also decrease.This has an impact on increasing greenhouse gases.The increase in carbon emission production is also caused by the dynamics of land use changes (Solomon et al., 2018).
The increase in the amount of carbon        This condition is in line with research (Agus et al., 2014), which states that the dynamics of changes in land use also cause an increase in carbon emission production.Apart from that, the impact of changes in land use on stock size has also been studied by (Kurniawati, 2021)

The decline in carbon reserves on Gili
Matra is due to the use of space for tourism-supporting facilities and infrastructure, as the direction of the spatial pattern plan for the next 20 years to be designated as a tourism zone.
According to (Selvia & Iemaaniah, 2024) the establishment of Gili Matra as a function is like two swords: on the one hand, wanting to make Gili Matra a conservation area, but on the other hand, also developing the economy through the tourism sector.
According to (Massetti & Gil, 2020) apart from the potential loss of carbon stocks due to changes in land cover, it is also observed to be related to the loss of development of the tourism sector has shaped each island's structure and spatial patterns, where open land has been converted into tourism-supporting facilities and infrastructure such as accommodation, restaurants, cafes, food stalls, tourism service providers, and other public facilities.Gili Trawangan, Gili Meno, and Gili Air developed in the 1980s, when tourists first visited Gili Matra to enjoy various underwater https://doi.org/10.20961/ge.v10i2.86109https://jurnal.uns.ac.id/GeoEco/article/view/86109Comparison Of Carbon Stock Based… | 222 beauties such as snorkeling, diving, sunset points, and enjoying the beach atmosphere and other natural beauty (Septiani & Santoso, 2019).Initially, only a few accommodations were available in the form of guest houses, which residents rented out for tourists who wanted to stay overnight.In line with policy developments such as the designation of the Gili Matra Area as a Marine Nature Tourism Park Area through the Decree of the Minister of Forestry No. 85/Kpts-II/1993, this started the development of several other policies that made the name

Figure 1 .
Figure 1.Development of policies that influence the use of space on Gili Matra After enacting a policy related to establishing the Gili Matra water tourism park in 1993, it led to an increase in the number of tourists and supporting facilities.Based on data from report document of the North Lombok Regency Tourism Office, it is known that the al., 2023) regarding the comparison of carbon stocks based on

Figure 2 .
Figure 2. Research Location This research uses secondary data and primary data.Secondary data is a Spatial Pattern Plan Map and Technical Material, which are part of the Detailed Spatial Plan (RDTR) document for the Gili Tramena Tourism Area and its Surroundings.Primary data was obtained from field survey activities in the form of documentation of various land covers and locations that experienced changes in land cover and ground checks to conduct accuracy tests.The equipment used is GPS, a handphone camera, and a laptop equipped with Arc.Gis, Google Earth Pro, MS Word, and MS Excel.Figure 3 shows a research flow chart that includes the analysis stages carried out in this research, including: 1) classification analysis of existing land use on Gili Matra; 2) analysis of gaps or deviations in existing

Figure 3 .
Figure 3. Research Flow Chart Overall, the amount of carbon stocks is known that the least amount is open land with little vegetation with a carbon stock coefficient of 3.4 and a total carbon stock of 565.05 tons C. Based on the spatial pattern plan map in Gili Matra, it is known that there are two zones, including the marine tourism park zone and the natural tourism park zone, which has a total of 21 sub-zones (see Table 2).Conversion of carbon stocks is carried out by multiplying the area of each zone by the coefficient of carbon stocks.Overall, carbon stocks based on existing land use are more than based on spatial pattern plans, namely 12,571.24tons C and 2,616.75tons C, respectively.There is a reduction in carbon stocks in spatial pattern plans because the proportion of green land is decreased due to the allotment of built-up lands in the spatial pattern plan.
, who classified land use in the city of Surabaya between 2000 and 2020 and then converted it to the carbon stock coefficient per each land use classification.However, this research was different from the spatial pattern plan.Meanwhile, this research compares carbon stock conversion based on existing land use and planned spatial patterns.This research shows that spatial pattern planning in spatial planning, especially for small islands, also influences carbon stocks in the future.Research on carbon dynamics from changes in land cover and use over ten is caused by the allocation of space in the spatial pattern plan, which is dominated by natural tourism park zones and tourism sub-zones.Meanwhile, existing land cover is dominated by potential protected zones such as local protection or lake borders, coastal borders, and mangrove ecosystem areas.The dilemma in planning spatial patterns on small islands such as Gili Matra is the status of land ownership in the form of property rights, which are challenging to acquire or plan as protected zones because conflict with the interests or needs of individuals or groups in making changes to the use of the land they own.The results of this research show that planning spatial patterns in an area can reduce carbon stocks.This research will have implications for environmental change, where the proportion of built-up land will increase so that the vegetation that functions to absorb carbon will decrease.Therefore, so that the spatial pattern plan that has been prepared out supervision and control in zones designated as protected zones so that they do not change their function to built-up land; 4. They were developing the concept of sustainable tourism, where the zones designated as tourism zones maintain carrying capacity and dampening capacity for the environment.

Table 1 . Carbon Estimation Based on Existing Land Cover on Gili Matra
land is 67.53%.Existing land use on Gili Matra is dominated by built-up land with an area of 223.55 ha.The development of are decreasing.Figure 4. shows land use changes in Gili Matra over the past ten years.https://doi.org/10.20961/ge.v10i2.86109https://jurnal.uns.ac.id/GeoEco/article/view/86109Comparison Of Carbon Stock Based… | 228 efforts made by the government include preparing spatial planning documents as a control measure over space utilization in Gili Matra.In 2022, a Detailed Spatial Planning Plan (RDTR) for the Tramena Tourism Area, which consists of Selamat District and Tanjung District, has been prepared.The document is in the process of substance approval at the central level. ://doi.org/10.20961/ge.v10i2.86109https://jurnal.uns.ac.id/GeoEco/article/view/86109 httpsComparison Of Carbon Stock Based… | 230