Komunitas Fitoplankton Perairan Pantai Utara, Timur, Dan Selatan Pulau Lombok

Abstract

ABSTRAK
Perairan pantai menyediakan sumber daya alam yang melimpah dan potensial untuk
dimanfaatkan secara ekonomi. Tidak sedikit kegiatan pemanfaatan ekosistem pantai yang
disertai dengan dokumen pengelolaan. Tolok ukur kualitas perairan yang banyak dipakai
dan dilaporkan adalah komunitas fitoplankton. Untuk itu, survey ini dilakukan pada 3
stasiun di kawasan pemanfaatan ekosistem pantai untuk kegiatan budidaya kerang
mutiara. Empat titik sampling ditetapkan pada masing-masing stasiun. 50 ml sampel air
laut diambil pada setiap titik sampling menggunakan jaring plankton dengan mata jaring
berukuran 20 üm. Perairan pantai utara dan timur pulau Lombok didominasi oleh
Bacteriastrum delicatulum dan pantai selatan pulau Lombok didominasi oleh Chaetoceros
affinis. Secara umum, ketiga titik sampling penelitian ini didominasi oleh spesies dari
genus Chaetoceros. Tetapi Bacteriastrum delicatulum adalah jenis yang paling dominan
dan melimpah di ketiga lokasi sampling. Indeks diversitas spesies ketiga perairan pantai
pulau Lombok tersebut termasuk kategori sedang.
Kata kunci: Komunitas, Fitoplankton, Perairan Pantai, Ekosistem
PHYOPLANKTON COMMUNITY OF NORTH, EAST, AND SOUTH
LOMBOK ISLAND COASTAL WATERS
ABSTRACT
Coastal waters providing numerous diversity of flora and fauna since the area is a
suitable habitat for many flora and fauna species and have some high economic potential
uses. The flora and fauna than have economical benefits. Community of phytoplankton is
commonly recorded and studied for biological indicator of aquatic ecosystem
sustainability. Four sampling sites of each three station (north, east, and south) of Lombok
coastal waters were absorbed for phytoplankton community. Tweleve of 50 ml bottles
coastal waters samples were taken using a nylon plankton net of 20 üm mesh size. The
north and east coastal waters of Lombok were dominated by Bacteriastrum delicatulum
and the south coastal water of Lombok was dominated by Chaetoceros affinis. In general
the coastal waters of Lombok were dominated by species of the genus of Chaetoceros.
However, diatom Bacteriastrum delicatulum was the most commonly found and has the
highest density in all sampling sites.Species diversity index of phytoplankton in all three
sampling station of this study was intermediate category
Key woods: Community, Phytoplankton, Coastal Water, Ecosystem