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Preliminary Identification to Local Coral Bleaching Event in Manjuto Beach, Pesisir Selatan Regency, West Sumatra: Hydro-Oceanographic Perspectives

Jurnal Ilmiah Perikanan dan Kelautan · Vol. 13 No. 2 (2021) · pp. 156–170

DOI
10.20473/jipk.v13i2.25502
ISSN
2528-0759, 2085-5842
Published
2021-09-28
Publisher
Faculty of Fisheries and Marine Universitas Airlangga
Language
eng
License
creativecommons.org/licenses/by-nc-sa/4.0

Abstract

Highlight ResarchThe cause of local coral bleaching in Manjuto Beash has been addressed.The influence of ebb-tide cycles on salinity mixing and stratification was analyzed.Spatial analysis Digital Shoreline Analysis System (DSASv5) was conducted to determine the coastline changes in Manjuto Beach.Flow model flexible mesh was simulated to determine the flow pattern within Sungai Pinang Bay.AbstractIn October 2019, the local community reported the occurrence of coral bleaching of a colony of Acropora sp. at Manjuto Beach, Pesisir Selatan Regency experienced bleaching. It was published in several local news, becoming a trending topic among local and central government authorities and coastal communities. There were many inaccuracies about the cause of this phenomenon. This study aimed to identify the causes of local coral bleaching in Manjuto Beach based on oceanographic perspectives. The water quality data collected using TOA DKK water quality checker in the surrounding Manjuto Beach were assessed descriptive-statistically. This study also analyzed the spatial changes of the coastline using DSASv5. A time series of tidal data was also used to analyze the tidal range-induced salinity stratification. A flow model with a flexible mesh was also simulated to determine the water mass movement and longshore current patterns in Manjuto Beach. Dissolved oxygen (DO), temperature, and salinity showed anomalies compared to the water quality standard to support marine life. During both flood and ebb tides, it ranged from 5.8-11.2 mg/L, 28-28.3oC, and 25-28 o/oo, respectively. The other parameters measured (pH, conductivity, turbidity, and density) were suitable for marine biota. The findings show that tidal range has a unique influence on salinity stratification. The intrusion of groundwater supply resulted in lowering of salinity, inducing local coral bleaching in Manjuto Beach. Changes in salinity levels were also triggered by tidal current ranging from 0-0.31 m/s resulting in cumulative salinity shock. Currently, Manjuto Beach is experiencing accretion ranging from 2.36-3.17 m/year, altering the water coverage through the flood-ebb cycles. Those states cause cumulative sun rays' exposures and salinity shock induced by flood-ebb cycles. That is why local coral bleaching event is undoubtedly avoided.

Keywords

Collaboration network of the authors

23 authors · 55 co-authorship links

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Co-authorOrganisationJoint articles
Wisnu Arya GemilangAffiliation unknown5
Koko OndaraAffiliation unknown3
Gunardi KusumahAffiliation unknown2
Semeidi HusrinAffiliation unknown2
Lilik MaslukahAffiliation unknown2
Aprizon PutraAffiliation unknown1
Joko PrihantonoAffiliation unknown1
Herdiana MutmainahAffiliation unknown1
Muhammad RamdhanAffiliation unknown1
Aida HeriatiAffiliation unknown1
Eva MustikasariAffiliation unknown1
Ilham IlhamAffiliation unknown1
Sugeng WidadaAffiliation unknown1
Anindya WirasatriyaAffiliation unknown1
Baskoro RochaddiAffiliation unknown1
M. Firouz Dimas SadewoAffiliation unknown1
Gegar Sapta PrasetyoAffiliation unknown1
Try Al TantoAffiliation unknown1
Ilham IlhamAffiliation unknown1

Affiliations come from OpenAlex; journal OAI-PMH metadata carries none. Authors without an OpenAlex ID are matched by name, which can merge or split people.

Metadata source: OAI-PMH (metadata jurnal) https://e-journal.unair.ac.id/index.php/JIPK/oai, first harvested 9 Nov 2026, last seen 9 Nov 2026.
Original metadata (oai_dc) 
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	<dc:title xml:lang="en-US">Preliminary Identification to Local Coral Bleaching Event in Manjuto Beach, Pesisir Selatan Regency, West Sumatra: Hydro-Oceanographic Perspectives</dc:title>
	<dc:creator>Wisha, Ulung Jantama</dc:creator>
	<dc:creator>Dhiauddin, Ruzana</dc:creator>
	<dc:creator>Rahmawan, Guntur Adhi</dc:creator>
	<dc:creator>Wijaya, Yusuf Jati</dc:creator>
	<dc:subject xml:lang="en-US">Coral bleaching</dc:subject>
	<dc:subject xml:lang="en-US">Manjuto Beach</dc:subject>
	<dc:subject xml:lang="en-US">Hydro-oceanography</dc:subject>
	<dc:subject xml:lang="en-US">coastline changes</dc:subject>
	<dc:description xml:lang="en-US">Highlight ResarchThe cause of local coral bleaching in Manjuto Beash has been addressed.The influence of ebb-tide cycles on salinity mixing and stratification was analyzed.Spatial analysis Digital Shoreline Analysis System (DSASv5) was conducted to determine the coastline changes in Manjuto Beach.Flow model flexible mesh was simulated to determine the flow pattern within Sungai Pinang Bay.AbstractIn October 2019, the local community reported the occurrence of coral bleaching of a colony of Acropora sp. at Manjuto Beach, Pesisir Selatan Regency experienced bleaching. It was published in several local news, becoming a trending topic among local and central government authorities and coastal communities. There were many inaccuracies about the cause of this phenomenon. This study aimed to identify the causes of local coral bleaching in Manjuto Beach based on oceanographic perspectives. The water quality data collected using TOA DKK water quality checker in the surrounding Manjuto Beach were assessed descriptive-statistically. This study also analyzed the spatial changes of the coastline using DSASv5. A time series of tidal data was also used to analyze the tidal range-induced salinity stratification. A flow model with a flexible mesh was also simulated to determine the water mass movement and longshore current patterns in Manjuto Beach. Dissolved oxygen (DO), temperature, and salinity showed anomalies compared to the water quality standard to support marine life. During both flood and ebb tides, it ranged from 5.8-11.2 mg/L, 28-28.3oC, and 25-28 o/oo, respectively. The other parameters measured (pH, conductivity, turbidity, and density) were suitable for marine biota. The findings show that tidal range has a unique influence on salinity stratification. The intrusion of groundwater supply resulted in lowering of salinity, inducing local coral bleaching in Manjuto Beach. Changes in salinity levels were also triggered by tidal current ranging from 0-0.31 m/s resulting in cumulative salinity shock. Currently, Manjuto Beach is experiencing accretion ranging from 2.36-3.17 m/year, altering the water coverage through the flood-ebb cycles. Those states cause cumulative sun rays' exposures and salinity shock induced by flood-ebb cycles. That is why local coral bleaching event is undoubtedly avoided.</dc:description>
	<dc:publisher xml:lang="en-US">Faculty of Fisheries and Marine Universitas Airlangga</dc:publisher>
	<dc:date>2021-09-28</dc:date>
	<dc:type>info:eu-repo/semantics/article</dc:type>
	<dc:type>info:eu-repo/semantics/publishedVersion</dc:type>
	<dc:format>application/pdf</dc:format>
	<dc:format>text/xml</dc:format>
	<dc:identifier>https://e-journal.unair.ac.id/JIPK/article/view/25502</dc:identifier>
	<dc:identifier>10.20473/jipk.v13i2.25502</dc:identifier>
	<dc:source xml:lang="en-US">Jurnal Ilmiah Perikanan dan Kelautan; Vol. 13 No. 2 (2021): JURNAL ILMIAH PERIKANAN DAN KELAUTAN; 156-170</dc:source>
	<dc:source>2528-0759</dc:source>
	<dc:source>2085-5842</dc:source>
	<dc:language>eng</dc:language>
	<dc:relation>https://e-journal.unair.ac.id/JIPK/article/view/25502/15690</dc:relation>
	<dc:relation>https://e-journal.unair.ac.id/JIPK/article/view/25502/41087</dc:relation>
	<dc:rights xml:lang="en-US">Copyright (c) 2021 Jurnal Ilmiah Perikanan dan Kelautan</dc:rights>
	<dc:rights xml:lang="en-US">http://creativecommons.org/licenses/by-nc-sa/4.0</dc:rights>
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