Kelimpahan dan Densitas Rekrutmen Karang Keras Pada Settlement Plate Posisi Horizontal dan Vertikal Di Perairan Malang Selatan

Rahman Septiandi, Adrian (2021) Kelimpahan dan Densitas Rekrutmen Karang Keras Pada Settlement Plate Posisi Horizontal dan Vertikal Di Perairan Malang Selatan. Sarjana thesis, Universitas Brawijaya.

Abstract

Terumbu karang adalah salah satu ekosistem yang memiliki kehidupan yang unik dan juga menjadi bagian dari ekosistem laut yang sangat penting karena menjadi sumber kehidupan bagi beraneka ragam biota laut. Biodiversitas dan komposisi karang pada suatu wilayah tergantung pada proses reproduksi yang terjadi dan tingkat keberhasilan rekrutmen karang yang bertahan di perairan tersebut. Keberhasilan rekrutmen karang di lingkungan terumbu karang ditentukan oleh tersedianya larva karang, substrat untuk penempelan larva dan juga kondisi perairan yang mendukung proses rekutmen. Sebagian besar larva yang berperan dalam proses rekrutmen karang ini berasal dari satu wilayah perairan saja (rekrutmen lokal). Penelitian pola rekrutmen dengan menggunakan berbagai substrat buatan sebagai media penempelan juvenil menunjukkan adanya pengaruh jenis serta struktur permukaan substrat terhadap penempelan juvenil karang. Peletakan posisi substrat juga mempengaruhi proses penempelan larva, hal tersebut dimungkinkan berkaitan dengan kebutuhan cahaya untuk fotosintesis zooxanthellae yang berpengaruh terhadap pertumbuhan juvenil karang. Penelitian dilaksanakan di Perairan Malang Selatan, Kecamatan Sumbermanjing Wetan, Kabupaten Malang, Jawa Timur. Terdapat 6 titik lokasi pemasangan settlement plate, yaitu Jeti Pelabuhan Sendang Biru, Waru-waru, Teluk Semut, Tiga Warna, Jembatan Panjang Tanjung Sirap (JPTS), dan Kondang Merak. Penelitian dilakukan pada bulan Juli 2020 sampai dengan bulan Februari 2021. Analisa data dilakukan dengan cara deskriptif yaitu menggunakan grafik dan tabulasi. Data-data tersebut adalah data keanekaragaman, densitas, dan kelimpahan karang rekrut yang menempel pada settlement plate posisi horizontal dan vertikal. Selain itu, disajikan data penunjang diantaranya adalah persentase tutupan karang hidup dan laju sedimentasi. Berdasarkan hasil identifikasi karang rekrut yang menempel pada settlement plate posisi horizontal dan vertikal didapatkan 5 famili, yaitu acroporidae, agariciidae, pocilloporidae, poritidae, dan fungidae. Kelimpahan jenis karang rekrut tertinggi pada settlement plate short immersion dan long immersion, baik posisi horizontal maupun vetikal terdapat pada famili Pocilloporidae. Rata-rata densitas karang rekrut pada settlement plate short immersion posisi horizontal dan vertikal memiliki masing-masing nilai 0,051 koloni/m2 dan 0,008 koloni/m2. Rata-rata densitas karang rekrut pada settlement plate long immersion memiliki nilai 0,137 koloni/m2 untuk posisi horizontal dan 0,002 koloni/m2 untuk posisi vertikal.

English Abstract

Coral reefs are one of the ecosystems that have a unique life and are also part of a very important marine ecosystem because they are a source of life for various marine biota. Biodiversity and coral composition in an area depend on the reproductive process that occurs and the success rate of recruitment of corals that survive in these waters. The success of coral recruitment in the coral reef environment is determined by the availability of coral larvae, substrate for attachment of larvae and also water conditions that support the recruitment process. Most of the larvae that play a role in this coral recruitment process come from only one water area (local recruitment). Research on recruitment patterns using various artificial substrates as a medium for juvenile coral attachment shows that there is an effect of the type and surface structure of the substrate on the attachment of juvenile corals. The placement of the substrate position also affects the attachment process of the larvae, this may be related to the need for light for photosynthesis of zooxanthellae which affects the growth of juvenile corals. The research was conducted in South Malang Sea, Sumbermanjing Wetan District, Malang, East Java. There are 6 points for the installation of settlement plates, namely Jetty from Sendang Biru, Waru-waru, Teluk Semut, Tiga Warna, Tanjung Sirap Long Bridge (JPTS), and Kondang Merak. The study was conducted from July 2020 to February 2021. Data analysis was carried out in a descriptive way, using graphs and tabulations. These data are data on the diversity, density, and abundance of recruit corals attached to the settlement plate in horizontal and vertical positions. In addition, supporting data is presented including the percentage of live coral cover and sedimentation rate. Based on the identification of recruited corals attached to the settlement plate in horizontal and vertical positions, there were 5 families, namely acroporidae, agariciidae, pocilloporidae, poritidae, and fungidae. The highest abundance of recruit coral species was found in the short immersion and long immersion settlement plates, both horizontally and vertically, in the family Pocilloporidae. The average density of recruit corals on the settlement plate short immersion horizontal and vertical positions had values of 0.051 colonies/m2 and 0.008 colonies/m2, respectively. The average density of recruit corals on the settlement plate long immersion has a value of 0.137 colonies/m2 for the horizontal position and 0.002 colony/m2 for the vertical position.

Other obstract

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Item Type:	Thesis (Sarjana)
Identification Number:	333.956
Uncontrolled Keywords:	-
Subjects:	300 Social sciences > 333 Economics of land and energy > 333.9 Other natural resources > 333.95 Biological resources > 333.956 Fishes
Divisions:	Fakultas Perikanan dan Ilmu Kelautan > Ilmu Kelautan
Depositing User:	Unnamed user with email gaby
Date Deposited:	24 Oct 2021 06:17
Last Modified:	14 Oct 2024 08:09
URI:	http://repository.ub.ac.id/id/eprint/185765

Text ADRIAN RAHMAN SEPTIANDI..pdf Download (2MB)

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