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SAYYIDAH NURUL HILALIYAH

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Abstrak (Bhs. Indonesia)

Muara Sungai Pemali, yang terletak di Desa Kaliwlingi Kabupaten Brebes,
Provinsi Jawa Tengah, merupakan salah satu daerah yang memiliki ekosistem
mangrove. Namun, ekosistem tersebut mengalami tekanan akibat alih fungsi
lahan menjadi tambak bandeng dan udang. Tujuan dari penelitian ini adalah
untuk mengetahui hubungan kerapatan vegetasi mangrove dengan struktur
komunitas gastropoda. Pengambilan data dilakukan di musim kemarau pada
bulan Agustus 2025. Metode penelitian yang digunakan pada peneilitian ini
adalah metode survei dengan pengamatan langsung dan metode analisis data
statistik. Analisis data statistik menggunakan Principal Component Analysis (PCA).
Berdasarkan hasil penelitian, ditemukan dua spesies mangrove, yaitu Rhizopora
mucronata dan Avicennia marina, dengan kisaran kerapatan 1.522 – 1.789 ind/ha.
Berdasarkan hasil pengamatan struktur komunitas gastropoda di Hutan
Mangrove Muara Sungai Pemali ditemukan 10 spesies dari 5 Famili, yaitu Famili
Littorinidae, Ellobiidae, Cerithium, Potamididae, dan Neritidae. Kondisi fisika
dan kimia perairan pada Muara Sungai Pemali masih mendukung kelangsungan
hidup gastropoda karena memiliki nilai yang sesuai dengan baku mutu kualitas
air. Hubungan kerapatan mangrove dan parameter fisika kimia perairan
terhadap struktur komunitas gastropoda menunjukkan bahwa variabilitas
kondisi lingkungan sangat menentukan struktur dan stabilitas komunitas biota.
Faktor-faktor seperti salinitas, DO, suhu, serta pH berperan sebagai
pengendali utama kondisi struktur komunitas gastropoda di ekosistem
mangrove.

Abtrak (Bhs. Inggris)

Pemali River Estuary, located in Kaliwlingi Village, Brebes Regency, Central Java
Province, is one of the areas with a mangrove ecosystem. However, this
ecosystem is under pressure due to land conversion into milkfish and shrimp
ponds. The purpose of this study was to determine the relationship between
mangrove vegetation density and gastropod community structure. Data
collection was carried out in the dry season in August 2025. The research method
used in this study was a survey method with direct observation and statistical
data analysis methods. Statistical data analysis used Principal Component
Analysis (PCA). Based on the results of the study, two mangrove species were
found, namely Rhizopora mucronata and Avicennia marina, with a density range of
1,522 - 1,789 ind / ha. Based on the results of observations of the gastropod
community structure in the Pemali River Estuary Mangrove Forest, 10 species
from 5 Families were found, namely the Littorinidae, Ellobiidae, Cerithium,
Potamididae, and Neritidae Families. The physical and chemical conditions of
the waters in the Pemali River Estuary still support the survival of gastropods, as
they meet water quality standards. The relationship between mangrove density
and water physicochemical parameters and gastropod community structure
indicates that environmental variability significantly determines the structure
and stability of the biota community. Factors such as salinity, dissolved oxygen
(DO), temperature, and pH plays a role as the main controller of the condition of
the gastropod community structure in the mangrove ecosystem.
Keywords: Mangrove, Gastropod Community Structure, Water Parameters, PCA

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