Identifikasi Pola Migrasi Zooplankton secara Temporal Berdasarkan Data Water Column Echosounder

Sholihah, Rayinda Santriana Umi (2025) Identifikasi Pola Migrasi Zooplankton secara Temporal Berdasarkan Data Water Column Echosounder. Other thesis, Institut Teknologi Sepuluh Nopember.

Text 5016211069-Undergraduate_Thesis.pdf Restricted to Repository staff only Download (10MB) | Request a copy

Abstract

Zooplankton merupakan komponen utama ekosistem laut yang berperan sebagai penghubung antara fitoplankton dan organisme tingkat trofik lebih tinggi. Selain itu, zooplankton juga berkontribusi dalam siklus biogeokimia, khususnya transportasi karbon melalui migrasi vertikalnya atau Diel Vertical Migration (DVM). Penelitian ini untuk mengidentifikasi pola migrasi vertikal zooplankton secara temporal di wilayah gunung laut Gunung Hobal dan Gunung Batutara di Laut Flores dengan pendekatan hidroakustik menggunakan data water column dari Multibeam Echosounder. Analisis ini menggunakan parameter oseanografi temperature, salinitas dari data CTD dan kelimpahan fitoplankton dari plankton net dalam Ekspedisi Jala Citra 3 yang dilaksanakan oleh PUSHIDROSAL. Penelitian ini, menghasilkan zooplankton mengalami migrasi vertikal harian atau DVM dengan pola naik ke lapisan perairan dangkal (50–100 m) pada malam hari dan turun ke kedalaman 200–900 m pada siang hari. Pola ini terekam secara jelas pada lapisan Deep Scattering Layer (DSL) yang divisualisasikan dengan intensitas backscatter tinggi. DSL diperoleh dengan menerapkan nilai threshold di Gunung Batutara -90 hingga -36 dB dan di Gunung Hobal antara -78 hingga -36 dB. Kedalaman lapisan konsentrasi zooplankton atau DSL dipengaruhi oleh kelimpahan fitoplankton, di mana zooplankton cenderung bertahan di kedalaman yang kaya fitoplankton, seperti di Gunung Hobal yang memiliki kelimpahan lebih tinggi 97.985 ind/m³ dibanding Gunung Batutara 21.268 ind/m³. Lapisan termoklin dan haloklin yang terbentuk dari variasi suhu, salinitas, dan kedalaman menjadi batas alami migrasi zooplankton. Penelitian ini menunjukkan bahwa kombinasi antara data hidroakustik dan parameter lingkungan mampu memberikan gambaran rinci tentang dinamika migrasi zooplankton.
================================================================================================================================
Zooplankton are key components of the marine ecosystem, acting as a crucial link between phytoplankton and higher trophic level organisms. In addition, zooplankton play an important role in biogeochemical cycles, particularly in carbon transport through their vertical migration behavior, known as Diel Vertical Migration (DVM). This study aims to identify the temporal patterns of vertical migration of zooplankton in the seamount regions of Mount Hobal and Mount Batutara in the Flores Sea using a hydroacoustic approach based on water column data from a Multibeam Echosounder. The analysis incorporates oceanographic parameters such as temperature and salinity obtained from CTD data, as well as phytoplankton abundance measured using a plankton net during the Jala Citra 3 Expedition conducted by PUSHIDROSAL. The results show that zooplankton perform daily vertical migration (DVM), ascending to shallower waters (50–100 m) at night and escending to depths of 200–900 mduring the day. This migration pattern is clearly recorded in the Deep Scattering Layer (DSL), visualized by high backscatter intensity. The DSL was identified using a backscatter threshold range of -90 to -36 dB at Mount Batutara and -78 to -36 dB at Mount Hobal. The depth of the zooplankton concentration layer (DSL) is influenced by phytoplankton abundance, with zooplankton tending to remain at depths rich in phytoplankton, as observed at Mount Hobal, which had a higher abundance of 97,985 ind/m³ compared to Mount Batutara with 21,268 ind/m³. Thermocline and halocline layers, formed due to variations in temperature, salinity, and depth, act as natural barriers for zooplankton migration. This study demonstrates that the integration of hydroacoustic data with environmental parameters provides a detailed picture of zooplankton migration dynamics.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Multibeam Echosounder, Water Column, Zooplankton, Oseanografi, Sustainable Development Goals, Multibeam Echosounder, Water Column, Zooplankton, Oceanography, Sustainable Development Goals
Subjects:	G Geography. Anthropology. Recreation > G Geography (General) > G109.5 Global Positioning System G Geography. Anthropology. Recreation > G Geography (General) > G70.217 Geospatial data G Geography. Anthropology. Recreation > GC Oceanography Q Science > QH Biology > QH541 Ecology Q Science > QL Zoology
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geomatics Engineering > 29202-(S1) Undergraduate Thesis
Depositing User:	Rayinda Santriana Umi Sholihah
Date Deposited:	23 Jul 2025 06:34
Last Modified:	23 Jul 2025 06:34
URI:	http://repository.its.ac.id/id/eprint/120787

Actions (login required)

View Item