Estimasi Stok Karbon Mangrove Melalui Pendekatan Allometrik di Kawasan Paluh Getah, Kabupaten Deli Serdang. (Study Case: Hutan Mangrove Paluh Getah)

Abstract

Mangrove Forests Are Coastal Ecosystems With An Exceptionally High Capacity To Absorb And Store Carbon, Reaching Levels 3–5 Times Greater Than Terrestrial Forests. This Capacity Is Derived From The Accumulation Of Biomass Produced Through Photosynthesis And The Substantial Organic Matter Stored Within Sediment, Making Mangroves Highly Effective Long-Term Carbon Sinks. The Mangrove Area Of Paluh Getah, Located In Percut Sei Tuan District, Deli Serdang Regency, Is One Of The Remaining Mangrove Regions With Significant Potential For Carbon Storage; However, Human Activities, Environmental Pressures, And Variations In Vegetation Density May Influence The Amount Of Carbon Retained In The Ecosystem. Therefore, This Study Aims To Estimate The Carbon Stock Of Mangrove Vegetation, Soil Organic Carbon, And The Overall Carbon Storage Within The Ecosystem As A Scientific Basis For Mangrove Management And Conservation. This Research Employed A Line Transect Method With 10 × 10 M Plots For Tree-Level Vegetation And 5 × 5 M Plots For Saplings. Three Observation Stations Were Established Based On Vegetation Density Identified Through NDVI Analysis, Each Consisting Of Three Plots. Vegetation Data Were Collected Using Non-Destructive Sampling By Measuring The Diameter At Breast Height (DBH), While Soil Samples Were Taken From A Depth Of 10–50 Cm At Each Plot. Mangrove Biomass Was Estimated Using Species-Specific Allometric Equations And Converted Into Carbon Stock Using A Carbon Fraction Of 0.47. Soil Organic Carbon Was Analyzed Using The Loss On Ignition (LOI) Method. The Results Show That The Total Carbon Stock In The Paluh Getah Mangrove Ecosystem Is 80,780.31 Tonc, Consisting Of 6,748.35 Tonc From Mangrove Vegetation And 74,031.96 Tonc From Soil Organic Carbon. The Average Carbon Stock Per Hectare Is 96.65 Tonc/Ha For Vegetation And 1,060.25 Tonc/Ha For Soil. Station 3 Recorded The Highest Carbon Values, With 150.55 Tonc/Ha From Vegetation And 1,236.31 Tonc/Ha From Soil, Influenced By Higher Vegetation Density, A Greater Number Of Individuals, And Larger Tree Diameters Compared To The Other Stations. Stations 1 And 2 Exhibited Lower Values Due To Sparse Vegetation And Indications Of Environmental Pressure. Overall, The Findings Highlight That The Paluh Getah Mangrove Ecosystem Holds Substantial Potential For Carbon Storage, Reinforcing The Importance Of Sustainable Management, Protection, And Restoration Efforts To Support Climate Change Mitigation And Preserve Coastal Ecosystem Resilience.