LANTIK HUTAJULU, ELSA TRESIA (2023) PERSENTASE PENUTUPAN MAKROALGA DI EKOSISTEM PADANG LAMUN PERAIRAN TELUK AWUR DAN PRAWEAN, JEPARA. Undergraduate thesis, Fakultas Perikanan dan Ilmu Kelautan.

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Abstract

ABSTRAK
(Elsa Tresia Lantik Hutajulu. 26040119120001. Persentase Penutupan
Makroalga di Ekosistem Padang Lamun Perairan Teluk Awur dan Prawean,
Jepara. Raden Ario & Ita Riniatsih).
Makroalga ialah salah satu organisme laut yang memiliki peranan penting
dalam keseimbangan ekosistem laut dangkal serta hidup berasosiasi dengan
ekosistem lamun. Perairan Teluk Awur dan Prawean salah satu lokasi
pertumbuhan makroalga di ekosistem lamun. Pengamatan makroalga dan lamun
menggunakan metode line transeck quadrat (50x50cm). Tujuan pengamatan
dilakukan untuk mengetahui spesies makroalga, spesies lamun, presentase
tutupannya serta hubungan antara makroalga dan ekosistem lamun. Data yang
diperoleh kemudian diolah menggunakan metode Principal Component Analysis
(PCA). Makroalga yang ditemukan di lokasi perairan Teluk Awur terdapat spesies
Padina sp., Halimeda sp., Sargassum sp., Dictyota sp., dan Caulerpa racemosa.
Pada perairan Prawean terdapat spesies Halimeda sp. , Dictyota sp., dan Amphiroa
sp. Lamun yang ditemukan dilokasi perairan Teluk Awur terdapat spesies
T.hemprichii dan E.acoroides ; perairan Prawean terdapat spesies T.hemprichii ,
E.acoroides , C.rotundata dan O.serrulata. Tutupan makroalga di Perairan Teluk
Awur berkisar 31,39 - 39,58 % dengan nilai rata-rata 35,77 % tergolong kategori
melimpah dibandingkan Perairan Prawean berkisar 6,71 - 9,92 % dengan nilai
rata-rata 8,63 % tergolong kategori sedikit. Tutupan lamun di Perairan Teluk
Awur kisaran 7,76 - 8,61 % dengan nilai rata-rata sebesar 8,19 %. tergolong
kategori jarang. Tutupan lamun di Perairan Prawean yang berkisar antara 40,43 –
42,23 % dan dengan nilai rata-rata sebesar 41,88 % tergolong kategori sedang.
Hasil analisis hubungan tutupan makroalga, tutupan lamun dan parameter
lingkungan melalui metode PCA di Perairan Teluk Awur dengan nilai pada
periode Mei sebesar 68,94 % menunjukkan bahwa ada dua variabel utama yaitu
korelasi positif (pH, kecepatan, penutupan lamun dan salinitas) dan korelasi
negatif (suhu dan kecerahan) ; periode September diperoleh nilai 76,08 %
menunjukkan bahwa dua variabel utama korelasi positif (pH, kecepatan) dan
korelasi negatif (kecerahan, penutupan lamun dan salinitas) dibandingkan dengan
Perairan Prawean Bandengan pada periode Mei sebesar 72,94 % menunjukkan
bahwa ada dua variabel korelasi positif (kecerahan, penutupan lamun dan DO)
dan korelasi negatif (pH dan salinitas) ; periode September diperoleh nilai 60,90
% menunjukkan bahwa dua variabel utama korelasi positif (salinitas, DO dan
penutupan makroalga) dan korelasi negatif (suhu).
Kata Kunci : Makroalga, Lamun, Parameter perairan

ABSTRACT
(Elsa Tresia Lantik Hutajulu. 26040119120001. Percentage of
Macroalgae Coverage in Seagrass Ecosystems Teluk Awur and Prawean, Jepara
Waters. Raden Ario & Ita Riniatsih).
Macroalgae is a marine organism that has an important role in the
balance of shallow marine ecosystems and lives in association with seagrass
ecosystems. The waters of Teluk Awur and Prawean are one of the locations for
macroalgae growth in the seagrass ecosystem. Macroalgae and seagrass
observations used the line transeck quadrat method (50x50cm). The aim of the
observations was to determine macroalgae species, seagrass species, the
percentage of cover and the relationship between macroalgae and the seagrass
ecosystem. The data obtained was then processed using the Principal Component
Analysis (PCA) method. The macroalgae found in the waters of Teluk Awur
include the species Padina sp., Halimeda sp., Sargassum sp., Dictyota sp., and
Caulerpa racemosa. In Prawean waters there are species of Halimeda sp. ,
Dictyota sp., and Amphiroa sp. The seagrasses found in the waters of Teluk Awur
include the species T.hemprichii and E.acoroides; Prawean waters contain the
species T.hemprichii, E.acoroides, C.rotundata and O.serrulata. Macroalgae
cover in Teluk Awur waters ranges from 31.39 - 39.58% with an average value of
35.77% belonging to the abundant category compared to Prawean waters
ranging from 6.71 - 9.92% with an average value of 8.63% belonging to the A
little. Seagrass cover in Teluk Awur waters ranges from 7.76 - 8.61% with an
average value of 8.19%. classified as rare. Seagrass cover in Prawean Waters
ranges from 40.43 – 42.23% and with an average value of 41.88% is classified as
medium. The results of the analysis of the relationship between macroalgae cover,
seagrass cover and environmental parameters using the PCA method in the
waters of Teluk Awur with a value in the May period of 68.94% shows that there
are two main variables, namely positive correlation (pH, speed, seagrass cover
and salinity) and negative correlation (temperature and brightness) ; For the
September period, a value of 76.08% was obtained, indicating that the two main
variables had positive correlation (pH, speed) and negative correlation
(brightness, seagrass cover and salinity) compared to Prawean Bandengan
Waters in the May period, which was 72.94%, indicating that there were two
correlation variables. positive (brightness, seagrass cover and DO) and negative
correlation (pH and salinity); For the September period, a value of 60.90% was
obtained, indicating that the two main variables had a positive correlation
(salinity, DO and macroalgae cover) and a negative correlation (temperature).
Keywords : Macroalgae,Seagrass,Water parameters,

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