HUBUNGAN KUANTITATIF FITOPLANKTON DAN ZOOPLANKTON PERAIRAN SUAKA PERIKANAN GILI RANGGO TELUK SEREWE LOMBOK TIMUR

Lalu Japa, Suripto dan I Gde Mertha

Abstract


ABSTRAK
Empat belas sampel air laut diamati komunitas planktonnya. Sampel diambil di kawasan perairan
suaka perikanan Gili Ranggo Teluk Serewe Lombok Timur, menggunakan jaring plankton bermata
jaring 20 mikron. Pengamatan dan identifikasi spesies plankton dilaksanakan di Laboratorium
Biologi Dasar UPT-MIPA Universitas Mataram. Kepadatan setiap jenis fitoplankton dan
zooplankton ditentukan berdasarkan jumlah individu per liter air. Indeks keanekaragaman jenis
fitoplankton dan zooplankton ditentukan berdasarkan “Indeks Shannon-Wienner”. Selanjutnya,
hubungan kuantitatif antara fitoplankton dan zooplankton ditentukan dengan menggunakan
“Korelasi Jenjang Spearman”. Total plankton teridentifikasi adalah 123 spesies meliputi 82 spesies
fitoplankton dan 41 spesies zooplankton. Komunitas fitoplankton didominasi oleh spesies dari famili
Bacillariophyceae (diatom), yaitu sebanyak 75 spesies. Tujuh spesies lainnya adalah anggota dari
family Dinophyceae (dinoflagellata). Sedangkan komunitas zooplankton di perairan suaka perikanan
Gili Ranggo Teluk Serewe Lombok Timur didominasi oleh spesies dari genus Tintinnopsis. Nilai
indeks keanekaragaman jenis fitoplankton dan zooplankton termasuk dalam kategori
keanekaragaman sedang. Hubungan kuantitatif fitoplankton dengan zooplankton pada taraf
signifikansi 5% dengan tujuh pasang jenjang, diperoleh hasil rs Hitung lebih kecil dari rs Tabel (0,643 <
0,857), artinya bahwa tidak terdapat korelasi positif antara fitoplankton dan zooplankton.
Kata-kata kunci: kuantitatif, fitoplankton, zooplankton, suaka perikanan

ABSTRACT
Fourteen of 50 ml volume bottle plankton net collecting samples were observed for the community of
plankton (phytoplankton and zooplankton) of the fish sanctuary of Gili Ranggo (Serewe Bay) east
Lombok. Samples observation and plankton identification were done at the Laboratory of Biology,
UPT-MIPA University of Mataram. Density or abundant of each plankton species was determined
based on the number of individual per liter. Shannon-Wienner Diversity Index was applied for
determining the species diversity index. Furthermore, the “Spearman Correlation” was also applied
for analyzing the quantitative correlation of phytoplankton and zooplankton. Total of 50 genera
containing 123 species of plankton were fully identified. This study fully identified of 82 species of
phytoplankton, the members of both Dynophyceae (dinoflagellates) and Bacillariophyceae (diatom)
families, and 41 species of zooplankton. The fish sanctuary of Gili Ranggo, Serewe Bay was
dominated by the member of Bacillariophyceae family. The 41 species of zooplankton is dominated
by the species of the genus Tintinnopsis. Both phytoplankton and zooplankton communities have a
high species diversity index category. Quantitative correlation of phytoplankton and zooplankton at
a seven pair and significant of 5%, is rs count less than rs Table (0.643 < 0.857). This means, there was
no possitive correlation between the present of phytoplankton and zooplankton communities.
Key Words: quantitative, phytoplankton, zooplankton, fish sanctuary


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DOI: http://dx.doi.org/10.29303/jbt.v13i1.72

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