Bivalves Infauna is a Bivalve that lives in the bottom of the waters, including in the waters of the Rigaih mangrove ecosystem in Setia Bakti District, Aceh Jaya Regency, Aceh Province. The aim of the study was to analyze the population of Bivalve Infauna, analyze the dominance of the Bivalvia Infauna population and analyze the bottom substrate of each Bivalvia Infauna population in the waters of the Mangrove Ecosystem in Setia Bakti District, Aceh Jaya Regency, Aceh Province. The research activity was carried out in April and May 2019. The population of Bivalves Infauna used a destructive sampling method. Bivalves infauna dominance data were analyzed by dominance index, while population and environmental conditions were analyzed descriptively. The results of the study indicated that the population of Bivalves infauna in the waters of the mangrove ecosystem in the study area was Anadaragranosa, Geloinaerosa, and Dosinia sp. The dominance index of the population of Anadaragranosa.67, Geloinaerosa is 0.22, and the index of dominance of Dosiniasp is 0.11. The results also show that the environmental conditions of the substrate are sand, mud and clay. Correspondingly, the study shows that there are three populations of Bivalve Infauna that dominate the ecosystem, namely Anadara granosa and found three bottom substrates in the ecosystem studied.

Birds are often used as indicators to describe the state of biodiversity, which means areas that are important for birds are also important for other flora and fauna. In addition, the distribution area of birds is well known, so that important regional livelihoods using birds as indicators can be carried out quickly and comprehensively. This research was conducted in February 2021, aiming to observe the habitat conditions of the Accipitridae family birds in Tahura Pocut Meurah Intan, Aceh Province. The method used in this research is an exploratory survey method. Data collection in the field by placing 15 observation points and 3 line transects is combined using the “look down method” and “upward observation”. Data analysis using principal component analysis (PCA) method. The results obtained that the area of suitable habitat (suitable) with good categories for bird species of the family Accipitridae of 4306, 106 ha or 69.23% and the medium category, which is available for food and accessible, but there is no reproductive location and has a high level of disturbance. of 1727, 294 ha (27.77 %). Birds of the Accipitridae family can carry out activities and find prey in three different forest types, namely primary, secondary and open forests.

Carbon storage is the total weight of carbon stored in the ecosystem at a certain time, especially in natural forests in the Tripa peat swamp area of Aceh Barat Daya. Peatlands are wetland ecosystems that are formed by the accumulation of organic matter on the forest floor from weathering of the vegetation on it over a long period of time. The research objectives were 1) to calculate peat soil carbon storage and 2) to measure the depth of peat soil in natural forest in the Tripa peat swamp area, Aceh Barat Daya Regency. The research activity was carried out from February to March 2021, in a natural forest in the Tripa Aceh Barat peat swamp area, divided into three stations and at each station, three sampling plots were made. Data collection using purposive sampling technique, Analysis of carbon stock was analyzed using the formula for calculating carbon stock by entering data on the percentage of soil organic carbon in the laboratory, and data on peat depth in a descriptive analysis. The results showed that the amount of peat soil carbon storage, especially in natural forest in the Tripa Aceh Barat Daya peat swamp area, was 2.556 tons/ha and the peat depth range was fibric with a depth of 0-95 cm, hemic 96-292 cm, and substance 293-310.