Struktur Komunitas Makrozoobenthos di Kawasan Mangrove Desa Bagan Deli Kecamatan Medan Belawan

ABSTRAK

TRI WULANDARI. Struktur Komunitas Makrozoobenthos di Kawasan
Mangrove Desa Bagan Deli Kecamatan Medan Belawan. Di bawah bimbingan
HESTI WAHYUNINGSIH dan AHMAD MUHTADI RANGKUTI.

Aktivitas yang terjadi di kawasan mangrove Desa Bagan Deli Kecamatan
Medan Belawan mengakibatkan terjadinya penurunan kualitas perairan sehingga
menyebabkan perubahan kondisi ekologis terhadap kehidupan biota terutama
makrozoobenthos. Penelitian ini bertujuan untuk mengetahui struktur komunitas
makrozoobenthos dan kualitas perairan berdasarkan kurva Abundance and
Comparison (ABC). Penelitian ini dilaksanakan di kawasan mangrove Desa
Bagan Deli Kecamatan Medan Belawan dari bulan Maret sampai April 2016.
Penentuan lokasi pengambilan sampel dilakukan dengan metode purposive
random sampling pada 3 stasiun. Pengambilan makrozoobenthos dan pengukuran
kualitas air dilakukan dengan rentang waktu 1,5 bulan. Hasil penelitian yang
didapatkan 12 jenis makrozoobenthos yaitu Telescopium telescopium, Turritella
terebra, Nassarius reeveanus, Cerithidea cingulata, Chicoreus capucinus, Nerita
lineata, Cerithidea obtusa, Littoraria melanostoma, Cassidula aurisfelis, Natica
tigrina, Uca vocans dan Uca rosea. Kepadatan berkisar antara 0 – 9 ind/m2.
Indeks keanekaragaman berkisar antara 1,79 – 2,09 termasuk keanekaragaman

sedang. Indeks keseragaman jenis berkisar antara 0,7 – 0,82 dan indeks dominansi
berkisar antara 0,15 – 0,2. Berdasarkan kurva ABC bahwa kawasan mangrove
Desa Bagan Deli termasuk dalam katergori tercemar sedang.
Kata kunci : Makrozoobenthos, Struktur Komunitas, Kurva ABC, Tingkat
Pencemaran

i
Universitas Sumatera Utara

ABSTRACT

TRI WULANDARI. Macrozoobenthos Community Structure in the Village of
Bagan Deli Mangrove Region District of Medan Belawan. Under academy
supervision by HESTI WAHYUNINGSIH and AHMAD MUHTADI
RANGKUTI.
Activities the continuous in mangrove areas Bagan Deli Village district
of Medan Belawan resulted in a decline in water quality, causing changes in the
ecological condition of the biota, especially macrozoobenthos. This research aims
to determine the community structure of macrozoobenthos and water quality
based on Abundance and Comparison (ABC) curve. This research was conducted

in the mangrove area of the village of Bagan Deli Medan District Belawan from
March until April 2016. The Sampling was done by purposive random sampling
method at three stations. Macrozoobenthos and water sampling was caarried out
for 1.5 months. Results of this research was found 13 species of macrozoobenthos
namely Telescopium telescopium, Turritella terebra, Nassarius reeveanus,
Cerithidea cingulata, Chicoreus capucinus, Nerita lineata, Cerithidea obtusa,
Littoraria melanostoma, Cassidula aurisfelis, Natica Tigrina, Uca vocans and
Uca rosea. Density was from 0 to 9 ind / m2. Diversity index was ranged from
1,79 to 2,09 and the level of diversity rated high. Uniformity index was ranged
from 0,7 to 0,82 and dominance index was ranged from 0,15 to 0,2. Based on the
ABC curve that the mangrove area of the village of Bagan Deli condition in the
medium polluted category.

Keywords : Macrozoobenthos, Community Structure, ABC curve, Pollution
Levels

ii
Universitas Sumatera Utara