HUBUNGAN PRODUKTIVITAS PRIMER FITOPLANKTON DENGAN KETERSEDIAAN UNSUR HARA DAN INTENSITAS CAHAYA DI PERAIRAN TELUK KENDARI SULAWESI TENGGARA

Nur Irawati, Enan M. Adiwilaga dan Niken T.M. Prawtiwi

Abstract


ABSTRAK
Penelitian ini merupakan kajian tentang hubungan produktivitas primer fitoplankton dengan
ketersediaan unsur hara dan intensitas cahaya di perairan Teluk Kendari. Penelitian ini dilaksanakan di
Perairan Teluk Kendari pada bulan April – Juni 2009 dengan menempatkan 3 stasiun penelitian.
Tujuan penelitian adalah mengkaji hubungan antara produktivitas primer fitoplankton (NPP) dengan
ketersediaan unsur hara dan intensitas cahaya (ICM) di perairan Teluk Kendari. Hasil penelitian
menunjukkan bahwa nilai produktivitas primer selama penelitian pada perairan Teluk Kendari yaitu
pada stasiun luar teluk berkisar 16,99 – 26,37 mgC/m3/4 jam, pada stasiun tengah teluk 21,09 – 31,25
mgC/m3/4 jam, dan 11,13–24,61 mgC/m3/4 jam pada stasiun dalam teluk. Hubungan produktivitas
primer dengan unsur hara dan ICM memperlihatkan keeratan hubungan yang kuat pada ketiga stasiun
penelitian sedang produktivitas primer dengan unsur hara dan ICM menunjukkan pola yang hampir
sama pada ketiga stasiun penelitian. Pada stasiun luar teluk, unsur hara amonia dan nitrat bersama
ICM menjadi faktor yang memberikan pengaruh nyata terhadap tinggi rendahnya nilai NPP, sedang
pada stasiun tengah dan dalam teluk, unsur hara nitrat dan ICM memberikan pengaruh yang nyata
terhadap tinggi dan rendahnya nilai NPP di perairan Teluk Kendari.
ABSTRACT
The sudy on the Phytoplankton primary productivity relationship to the availability of nutrient
element and light intensity in the waters of Kendari Bay was conducted on April-June 2009 at three
sites. The purpose of this research was to examine the relationship between primary productivity of
phytoplankton with nutrient availability and light intensity in the waters of the Bay of Kendari. Based
on the data description and laboratory analysis, net primary productivity values during the survey
period varied from 11.13 to 31.25 mgC/m3/4 hour with ranges of average value of NPP from 20.0 to
24.46 mgC/m3/4 hour. Sampling station located at the middle of the bay had the highest NPP value
followed by sampling station positioned at the mouth of the bay and the lowest value was found at
sampling station located near the river mouth of the upper part of the bay. Relationship between
primary productivity and light intensity depicted a strong correlation at the three sampling stations.
Relationship of primary productivity to nutrient and light intensity showed that the relationship were
high in all three stations. Similar pattern of relationship were shown among the three stations. At the
station located out of the Kendari Bay, nutrient element N (both ammonia and nitrate) and light
intensity were the main factors that signifacantly influence the level of NPP value, while station
located in the middle and inside the bay, results reveal that nitrate and light intensity had significat
influnce on the level of NPP values.
Key words: primary productivity of phytoplankton, nutrient elements, light intensity

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DOI: http://dx.doi.org/10.29303/jbt.v13i2.152

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