Keanekaragaman Kerang (Bivalvia) di Perairan Pantai Sei Nipah Indah Kecamatan Pantai Cermin Kabupaten serdang Bedagai Sumatera Utara
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Date
2022Author
Rahayu, Dwi Sri
Advisor(s)
Mulya, Miswar Budi
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Sei Nipah Indah beach is an area that has a water zone whose area is located
between the lowest and highest tides. Sei Nipah Indah beach has a coastline of ± 6
km. Along the coastline of Sei Nipah Indah various types of benthic organisms
from the class Bivalvia are found. Shellfish is one of several aquatic biota in the
coastal waters of Sei Nipah Indah. In addition, shells also as source of food and
has economic for people around Sei Naga Lawan village. The study aims to
analyze the bivalves community structure and the relationship between the
structure and physicochemical factors. This research was conducted in Sei Nipah
Indah Coastel Waters in June-July 2021. The sampling of location was
determined using purposive sampling method at 3 stations. While bivalves were
collected at 9 different points per station. The results obtained were 6 species of
bivalves, namely Perna viridis, Anadara antiquata, Anadara gubernaculum,
Meretris lusoria, Polymesoda erossa and Phapia undulata. Species densities
ranged from 5,6-8,8 ind/m². Diversity index ranged from 0,34-0,39 considered as
the low category. Uniformity index ranged from 0,18-1,79 which was categorized
as relatively uniform. The correlation value between the bivalve diversity index
and the physical and chemical factors of depth, salinity and C-Organic was very
strong. The correlation analysis value of BOD₅ and phosphate was strong. The
analysis value of pH and nitrat was low and the correlation analysis value of
water temperature, brightness and DO was lowest. Pantai Sei Nipah Indah merupakan daerah yang yang memiliki pasang surut
terendah dan pasang surut tertinggi. Pantai Sei Nipah Indah memiliki panjang
garis pantai ± 6 km. Disepanjang garis Pantai Sei Nipah Indah banyak ditemukan
berbagai macam jenis organisme bentik dari kelas Bivalvia. Kerang merupakan
satu diantara beberapa biota air yang hidup di Perairan Pantai Sei Nipah Indah.
Kerang juga merupakan bagian dari mata pencaharian masyarakat sekitar desa Sei
Naga Lawan karena memiliki nilai ekonomi yang tinggi sehingga dilakukan
penangkapan oleh masyarakat. Penelitian ini bertujuan untuk menganalisis
struktur komunitas bivalvia dan hubungan faktor fisik-kimianya. Penelitian ini
dilakukan di Perairan Pantai Sei Nipah Indah pada bulah Juni-Juli 2021.
Penentuan lokasi pengambilan sampel menggunakan metode purposive sampling
pada 3 stasiun. Pengambilan bivalvia pada 9 titik setiap stasiun. Hasil penelitian
yang didapatkan adalah 6 spesies bivalvia yaitu Perna viridis, Anadara antiquata,
Anadara gubernaculum, Meretrix lusoria, Polymesoda erosa dan Phapia
undulata. Kepadatan berkisar antara 5,6-8,8 ind/m². Indeks keanekaragaman
berkisar 0,34-0,39 termasuk kategori rendah. Indeks keseragaman berkisar 0,18-
1,79 dengan kategori setiap spesies relatif merata. Nilai korelasi antara indeks
keanekaragaman bivalvia dan faktor fisik-kimia perairan kedalaman, salinitas dan
C-Organik tergolong sangat kuat. Nilai analisis korelasi BOD₅ dan fosfat
tergolong kuat. Nilai analisis ph dan nitrat tergolong rendah dan nilai analisis
korelasi suhu, kecerahan dan DO tergolong sangat rendah.
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- Undergraduate Theses [977]