Analysis of the utilization of landsat 8 oli imagery for mapping the distribution of coral reefs in Pulau Weh Sabang

As one of the largest archipelagic countries globally, Indonesia has diverse natural resources, one of which is the coral reef ecosystem. Coral reef ecosystems are spread across almost all Indonesian waters, and Pulau Weh Sabang is one distribution area. This study aims to determine the distribution of coral reef ecosystems and test landsat 8 oli imagery accuracy in mapping coral reef ecosystems. The method used in this research is the nearest neighbour algorithm object-based classification method. The results showed that the coral reef ecosystem in Pulau Weh Sabang was divided into two classes: a healthy coral reef ecosystem class with 277.38 hectares and a medium condition coral reef ecosystem class with an area of 710.01 Ha.Keywords:Landsat 8 oliMappingDistributionCoral reefWeh Island

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Sponge community (Porifera) in coral reef ecosystem in Sabang, Aceh Province, Indonesia

Biodiversitas Journal of Biological Diversity ◽

10.13057/biodiv/d220647 ◽

2021 ◽

Vol 22 (6) ◽

Author(s):

Elsa Dianita Aulia ◽

Tri Aryono Hadi ◽

Rizkie Satria Utama

Keyword(s):

Coral Reef ◽

Benthic Communities ◽

Stable State ◽

Morphological Characters ◽

Coral Reef Ecosystem ◽

Significant Relationships ◽

Lack Of Information ◽

Aceh Province ◽

Coral Reef Ecosystems ◽

Reef Ecosystem

Abstract. Aulia ED, Hadi TA, Utama RS. 2021. Sponge community (Porifera) in coral reef ecosystem in Sabang, Aceh Province, Indonesia. Biodiversitas 22: 3394-3402. Sponges are one of the most influential benthic organisms in coral reef ecosystems. Many studies about sponge communities have been carried out globally, from tropical to temperate regions. In Indonesia, however, sponge communities have not been adequately observed, especially their diversity and interaction with habitats. Sabang, a developing city located in the northwest of Indonesia, has a lack of information about benthic communities and no reports about sponges. This study investigated the sponge community (species richness, coverage, and morphological characters) and the interactions, both within sponges and with corals and substrates, in Sabang. The study found that the sponge richness (species and morphology) and coverage are categorized as poor, having only 24 species with seven morphologies, and coverage of 1.79 ± 1.03% (SE). The interaction analyses showed significant relationships occur among sponge variables but not between sponges and corals, nor between sponges and their substrates. These results could be attributed to the hydrodynamic-related stresses in Sabang, which are likely influenced by exposure to the open ocean, a condition that is less favorable to diversity and interaction. It is necessary to regularly monitor the condition of benthic communities in Sabang in order to better understand their stable state and detect any change over time.

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KONDISI EKSISTING FAUNA MEGABENTHOS DI PERAIRAN LABUHAN PANDAN LOMBOK TIMUR PASCA GEMPA BUMI LOMBOK 7.0 SKALA RICHTER

JURNAL BIOLOGI TROPIS ◽

10.29303/jbt.v19i2.1303 ◽

2019 ◽

Vol 19 (2) ◽

pp. 172

Author(s):

Noar Muda Satyawan ◽

Novita Tri Atriningrum

Keyword(s):

Coral Reef ◽

External Disturbance ◽

Acanthaster Planci ◽

Coral Reef Ecosystem ◽

Dominance Index ◽

Ecological Changes ◽

Coral Reef Ecosystems ◽

Reef Health ◽

Belt Transect ◽

Reef Ecosystem

Abstrak : Gangguan eksternal pada ekosistem terumbu karang dapat terjadi secara alami ataupun karena aktifitas manusia yang menimbulkan perubahan fisik maupun ekologis. Perubahan ekologis dapat terlihat dari perubahan komposisi biota yang berasosiasi di dalamnya. Salah satu kelompok biota yang berasosiasi dengan terumbu karang adalah megabenthos. Tujuan dari penelitian ini adalah untk mengetahui kondisi eksisting fauna megabenthos pada ekosistem terumbu karang di perairan Labuhan Pandan Lombok Timur. Pengamatan dilakukan pada 5 stasiun yaitu Gili Bidara (BDR_01), Gili Kondo (KND_01), Gili Petagan 1 (PTG_01), Gili Petagan 2 (PTG_02), dan Gili Petagan 3 (PTG_03). Pengambilan data megabenthos dilakukan dengan metode Benthos Belt Transect (BBT). Hasil penelitian menunjukkan bahwa ditemukan 15 jenis megabenthos yang termasuk dalam 5 Phylum (Mollusca, Echinodermata, Chordata, Annelida, dan Platyhelminthes). Jumlah jenis tertinggi ditemukan pada phylum Echinodermata (10 jenis), kemudian diikuti oleh Mollusca (2 jenis), Chordata (1 jenis), Annelida (1 jenis), dan Platyhelminthes (1 jenis). Kepadatan megabenthos tertinggi ditemukan pada stasiun BDR_01 (10.571 ind/Ha), kemudian diikuti oleh stasiun KND_01 (10.214 ind/Ha), PTG_02 (9.857 ind/Ha), PTG_03 (8.429 ind/Ha) dan PTG_01 (1.714 ind/Ha). Keanekaragaman jenis tertingi ditemukan pada stasiun PTG_01 (H’=1,14), kemudian diikuti oleh BDR_01 (H’=0,76), KND_01 (H’=0,69), PTG_03 (H’=0,17) dan PTG_02 (H’=0,09). Hasil perhitungan indeks dominansi menunjukkan bahwa Didemnum molle (phylum Chordata) ditemukan dominan pada seluruh stasiun pengamatan. Ditemukan juga jenis megabenthos pemangsa hewan karang yaitu Acanthaster planci pada stasiun PTG_03 serta Drupella sp. pada stasiun BDR_01, KND_01 dan PTG_02. Beberapa jenis megabenthos yang ditemukan dapat dijadikan bioindikator dalam pemantauan kesehatan ekosistem terumbu karang di Perairan Labuhan Pandan, Lombok Timur.Kata Kunci: Kondisi eksisting, Megabenthos, Gempa Bumi, Labuhan Pandan, Lombok TimurAbstract: External disturbance to the coral reef ecosystem occured by naturally or due to human activities that cause physical and ecological changes. Ecological changes could be seen from changes in the composition of the associated biota. One of the biota groups that associated with coral reefs were megabenthos. The purpose of this study were to determine the condition of the megabenthos fauna on coral reef ecosystems in the Labuhan Pandan waters, Eastern Lombok. Observations were made at 5 stations namely Gili Bidara (BDR_01), Gili Kondo (KND_01), Gili Petagan 1 (PTG_01), Gili Petagan 2 (PTG_02), and Gili Petagan 3 (PTG_03). Data of Megabenthos were collected by Benthos Belt Transect (BBT) method. The results showed that found 15 species of megabenthos included in 5 phylum (Mollusca, Echinoderm, Chordata, Annelida, and Platyhelminthes). The highest number of species were found in Echinoderms phylum (10 species), followed by Mollusca (2 species), Chordata (1 species), Annelida (1 species), and Platyhelminthes (1 species). The highest megabenthos density were found at BDR_01 station (10,571 ind / Ha), then followed by stations KND_01 (10,214 ind / Ha), PTG_02 (9,857 ind / Ha), PTG_03 (8,429 ind / Ha) and PTG_01 (1,714 ind / Ha). The highest species diversity were found at stations PTG_01 (H '= 1.14), then followed by BDR_01 (H' = 0.76), KND_01 (H '= 0.69), PTG_03 (H' = 0.17) and PTG_02 (H '= 0.09). The calculation result of dominance index shows that Didemnum molle (phylum Chordata) were found dominant in all observation stations. Also found species of coral predator Acanthaster planci at PTG_03 station and Drupella sp. at stations BDR_01, KND_01 and PTG_02. Several species of megabenthos can be used as bioindicators to monitoring of coral reef health in Labuhan Pandan Waters, East Lombok.Keywords: Existing conditions, megabenthos, earthquake, Labuhan Pandan, Eastern Lombok

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FORAMINIFERA BENTONIK SEBAGAI BIOINDIKATOR KUALITAS PERAIRAN TERUMBU KARANG DI PULAU TEGAL, TELUK LAMPUNG, LAMPUNG

JURNAL GEOLOGI KELAUTAN ◽

10.32693/jgk.17.2.2019.599 ◽

2019 ◽

Vol 17 (2) ◽

Author(s):

Sevina Rahmi ◽

Suwarno Hadisusanto ◽

Nazar Nurdin ◽

Mira Yosi

Keyword(s):

Coral Reef ◽

Coral Reefs ◽

Water Depth ◽

Coral Reef Ecosystem ◽

Reef Community ◽

Tourist Destinations ◽

Low Diversity ◽

Almost All ◽

Reef Ecosystem

Foraminifera telah banyak digunakan sebagai indikator kualitas perairan sekitar terumbu karang di Indonesia berdasarkan perbandingan kelompok foraminifera bentonik tertentu. Studi tersebut diterapkan di sekitar Pulau Tegal, Teluk Lampung yang merupakan salah satu destinasi wisata yang secara tidak langsung memberikan pengaruh terhadap ekosistem terumbu karang. Penelitian ini bertujuan untuk mengetahui struktur komunitas foraminifera bentonik kaitannya dengan kondisi perairan terumbu karang Pulau Tegal, Teluk Lampung. Penelitian ini dilakukan pada 16 stasiun penelitian di Pulau Tegal yang mewakili semua sisi pulau dengan variasi kedalaman dari 0 meter hingga 28 meter. Hasil dari penelitian ini ditemukan 6.918 spesimen foraminifera bentonik dengan keanekaragaman yang tergolong rendah. Genera Amphistegina dan Elphidium ditemukan sangat melimpah pada hampir seluruh stasiun. Nilai Indeks FORAM (FI) diatas 4 ditemukan pada 11 stasiun penelitian yang mengindikasikan bahwa sebagian besar perairan Pulau Tegal berada dalam kondisi yang sangat baik dan kondusif untuk pertumbuhan serta pemulihan terumbu karang. Hasil ini sejalan dengan melimpahnya kehadiran kelompok foraminifera yang berasosiasi dengan terumbu karang pada perairan Pulau Tegal.Kata Kunci: Bioindikator, Pulau Tegal, Indeks FORAM, Terumbu Karang, Komunitas.Foraminifera has been widely used as an indicator of the quality of the waters around coral reefs in Indonesia based on the comparison of certain groups of benthonic foraminifera. The study was implemented around Tegal Island, Lampung Bay, which is one of the tourist destinations that influence the coral reef ecosystem. This study aims to determine the structure of bentonic foraminifera communities related to the condition of the coral reef waters of Tegal Island, Lampung Bay. This research was conducted at 16 research stations in Tegal Island representing all sides of the island with variations in depth from 0 m to 28 m water depth. The results of this study found 6.918 specimens of bentonic foraminifera with relatively low diversity. The genera Amphistegina and Elphidium were found to be very abundant in almost all stations. The FORAM Index (FI) above 4 was found in 11 research stations which indicated that most of the waters of Tegal Island were in very good conditions and conducive to the growth and recovery of coral reefs. This result is in line with the abundance of the presence of foraminifera groups associated with coral reefs in the waters of Tegal Island. Keywords: Bioindicator, Tegal Island, FORAM Index, Coral Reef, Community

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ANALISIS TINGKAT KESESUAIAN WISATA BAHARI PADA EKOSISTEM TERUMBU KARANG DI PULAU LAREA- REA KABUPATEN SINJAI

JOURNAL OF INDONESIAN TROPICAL FISHERIES (JOINT-FISH) : Jurnal Akuakultur, Teknologi Dan Manajemen Perikanan Tangkap, Ilmu Kelautan ◽

10.33096/joint-fish.v4i1.88 ◽

2021 ◽

Vol 4 (1) ◽

pp. 47-60

Author(s):

Isra Wahyudi ◽

Asbar Asbar ◽

Danial Sultan

Keyword(s):

Coral Reef ◽

Coral Reefs ◽

Carrying Capacity ◽

Environmental Parameters ◽

Coral Reef Ecosystem ◽

Government Programs ◽

Marine Tourism ◽

Suitability Index ◽

Coral Reef Ecosystems ◽

Reef Ecosystem

Coral reefs are one of the marine tourism potentials that need to be managed in a sustainable manner by looking at the suitability of tourism and the carrying capacity of the environment. Data on the potential for coral reefs will support government programs related to conservation and rehabilitation of coastal and marine ecosystems as a focus area for maritime research. This study aims to determine the potential and percentage of coral reef cover, know the tourism suitability index and environmental carrying capacity, know the direction of coral reef ecosystem management. The research method is using UPT (Underwater Photo Transect), as well as measurement of environmental parameters on Larea-rea Island. Data analysis using CPCe 4.1 software, and Arcgis 10.8 (Kismanto et.al, 2018). Than, an analysis of the suitability of diving tourism and an analysis of the carrying capacity of the area is carried out (Yulianda, 2018).Coral reefs are one of the marine tourism potentials that need to be managed in a sustainable manner by looking at the suitability of tourism and the carrying capacity of the environment. Data on the potential for coral reefs will support government programs related to conservation and rehabilitation of coastal and marine ecosystems as a focus area for maritime research. This study aims to determine the potential and percentage of coral reef cover, know the tourism suitability index and environmental carrying capacity, know the direction of coral reef ecosystem management. The research method is using UPT (Underwater Photo Transect), as well as measurement of environmental parameters on Larea-rea Island. Data analysis using CPCe 4.1 software, and Arcgis 10.8 (Kismanto et.al, 2018). Than, an analysis of the suitability of diving tourism and an analysis of the carrying capacity of the area is carried out (Yulianda, 2018). The results of this study indicate that the percentage of potential coral reef cover at all stations is 10-36%, indicating that the coral condition is not good (according to the conditions). Damage to coral reef ecosystems due to environmentally unfriendly fishing activities (Wardani, 2018). The number of lifeform types ranged from 8-12, while the number of fish species obtained was 37-44 species. The suitability class category based on the results of the analysis at the three stations obtained the appropriate category (S2), with a percentage of the IKW value of 50-67% (Yulianda, 2018). Then, area carrying capacity (DDK) in the diving tourism category is an average of 528 people / day from the three stations. Management and development of marine tourism can be done by determining the zone of utilization and rehabilitation of coral reef ecosystems, as well as limiting visitors for certain periods to reduce the potential impact of environmental degradation.

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STRUKTUR KOMUNITAS TERUMBU KARANG DI PERAIRAN TELUK BALIKPAPAN, KALIMANTAN TIMUR

Jurnal Segara ◽

10.15578/segara.v16i1.8649 ◽

2020 ◽

Vol 16 (1) ◽

Author(s):

Niken Financia Gusmawati ◽

Candra Dwi Puspita ◽

Herlina Ika Ratnawati

Keyword(s):

Coral Reef ◽

Coral Reefs ◽

Environmental Changes ◽

Coral Cover ◽

Nitrate Content ◽

Marine Biota ◽

Coral Reef Ecosystem ◽

Coral Reef Ecosystems ◽

Index Value ◽

Reef Ecosystem

Coral reefs are ecosystems with high productivity while being very vulnerable to environmental changes. The oil spill incident in Balikpapan Bay in 2018 still caused damage to the coral reef ecosystem in Tanjung Jumlai, Penajam Paser Utara Regency, East Kalimantan due to the use of dispersants in handling oil spills. Research on the condition of coral reefs is carried out to ensure the sustainability of the benefits of ecosystem products and services provided by coral reef ecosystems to communities around Balikpapan Bay. Coral reef research has been carried out at three transect station locations in the Tanjung Jumlai reef area. This research is aimed to determine the distribution, abundance, and structure of coral reef ecosystems in these waters. The study was conducted in October 2019. Data collection was carried out using the Point Intercept Transect (PIT) method. The results showed that the average percentage of coral cover was 55.7% with a good coral cover category. Substrate covering the bottom of the coral reef ecosystem is dominated by Acropora Tubulate and Acropora Branching from the biotic component, and Dead Coral with Algae and Rubble from the abiotic component. Diversity index value (H') in the waters is categorized as low species richness. This research has been identified only 10 genera in the study area where 9 genera are hard coral species. Similarity Index value (E) included in the medium category and dominance index value (D) belong to the medium category which means that there are no species that are very dominant in the observation area. Water quality at station 1 representing all observation stations shows results that the study area are still appropriate for marine biota according to Minister of Environment Decree 51/2004, except for nitrate content. Sediments also show no trace of hydrocarbons.Coral reefs are ecosystems with high productivity while being very vulnerable to environmental changes. The oil spill incident in Balikpapan Bay in 2018 still caused damage to the coral reef ecosystem in Tanjung Jumlai, Penajam Paser Utara Regency, East Kalimantan due to the use of dispersants in handling oil spills. Research on the condition of coral reefs is carried out to ensure the sustainability of the benefits of ecosystem products and services provided by coral reef ecosystems to communities around Balikpapan Bay. Coral reef research has been carried out at three transect station locations in the Tanjung Jumlai reef area. This research is aimed to determine the distribution, abundance, and structure of coral reef ecosystems in these waters. The study was conducted in October 2019. Data collection was carried out using the Point Intercept Transect (PIT) method. The results showed that the average percentage of coral cover was 55.7% with a good coral cover category. Substrate covering the bottom of the coral reef ecosystem is dominated by Acropora Tubulate and Acropora Branching from the biotic component, and Dead Coral with Algae and Rubble from the abiotic component. Diversity index value (H') in the waters is categorized as low species richness. This research has been identified only 10 genera in the study area where 9 genera are hard coral species. Similarity Index value (E) included in the medium category and dominance index value (D) belong to the medium category which means that there are no species that are very dominant in the observation area. Water quality at station 1 representing all observation stations shows results that the study area are still appropriate for marine biota according to Minister of Environment Decree 51/2004, except for nitrate content. Sediments also show no trace of hydrocarbons.

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VALUASI EKONOMI EKOSISTEM TERUMBU KARANG DI PULAU ENGGANO, KABUPATEN BENGKULU UTARA, PROVINSI BENGKULU

JURNAL ENGGANO ◽

10.31186/jenggano.4.2.160-173 ◽

2019 ◽

Vol 4 (2) ◽

pp. 160-173

Author(s):

Zamdial Zamdial ◽

Dede Hartono ◽

Ari Anggoro ◽

Ali Muqsit

Keyword(s):

Coral Reef ◽

Economic Value ◽

Small Island ◽

Option Value ◽

Coral Reef Ecosystem ◽

Existence Value ◽

Purposive Sampling ◽

Coral Reef Ecosystems ◽

Total Economic Value ◽

Reef Ecosystem

Pulau Enggano dengan luas ± 400,6 km2 (± 40.600 hektar) adalah sebuah pulau kecil terluar di Provinsi Bengkulu yang terletak di Perairan Barat Sumatera, dan termasuk wilayah Kabupaten Bengkulu Utara. Salah satu sumberdaya alam yang dominan di Pulau Enggano adalah ekosistem terumbu karang yang memberikan manfaat begitu besar bagi kehidupan masyarakat di Pulau Enggano. Penelitian ini bertujuan untuk menghitung valuasi ekonomi ekosistem terumbu karang di Pulau Enggano, untuk kepentingan perencanaan pemanfaatan dan pengelolaan secara berkelanjutan. Penelitian ini dilakukan dengan Metode Survai. Data parameter kualitas air dikumpulkan dengan pengukuran langsung di lokasi penelitian. Data untuk menghitung nilai keberadaan ekosistem terumbu karang dikumpulkan dengan metode wawancara terhadap 180 orang responden yang dipilih secara purposive sampling. Nilai ekonomi total ekosistem terumbu karang dianalisis dan dihitung berdasarkan nilai manfaat langsung, nilai manfaat tidak langsung, nilai manfaat pilihan dan nilai manfaat warisan. Nilai rata-rata parameter perairan di perairan Pulau Enggano secara berturut-turut adalah suhu (29,660C), salinitas (35,06 ‰), kuat arus (2,13 m/s), kecerahan 5,33 m), Oksigen Terlarut/DO (7,39 mg/l), dan pH (7,13). Nilai parameter perairan menunjukkan kondisi perairan yang masih baik dan belum tercemar sehingga dapat mendukung keberadaan dan pertumbuhan ekosistem terumbu karang di Perairan Pulau Enggano. Luas ekosistem terumbu karang di Pulau Enggano ± 5.097 hektar. Nilai manfaat ekonomi total ekosistem terumbu karang adalah Rp. 176.901.038.387,- per tahun, yang terdiri dari nilai manfaat langsung Rp. 561.327.640,- per tahun; nilai manfaat tidak langsung Rp. 46.342.500.000,- per tahun, nilai manfaat pilihan Rp. 2.516.077.983,- , nilai manfaat keberadaan Rp. 127.425.000.000,- per tahun dan nilai warisan Rp. 56.132.764,- per tahun.ECONOMIC VALUATION OF CORAL REEF IN ENGGANO ISLAND, NORTH BENGKULU REGENCY, BENGKULU PROVINCE. Enggano Island with area of ± 400.6 km2 (± 40,600 hectares) is an the outer small island in Bengkulu Province that located in the West Coast of Sumatra, and include of North Bengkulu Regency. One of the dominant natural resources in Enggano Island is a coral reef ecosystem that provides enormous benefits to people's lives in Enggano Island. This study aims to calculate the economic valuation of coral reef ecosystems in Enggano Island, for stake of planning, utilization and sustainable management. This research is done by Survey Method. The data of water quality parameter was collected by direct measurement at the study location. Data to calculate the existence value of coral reef ecosystem was collected by interview method to 180 respondents that chosen by purposive sampling. The total economic value of coral reef ecosystems is analyzed and calculated based on the direct value, indirect value, option value and bequest value. The average values of water parameters in Enggano Island waters are (29,66 oC), salinity (35.06 ‰), current speed (2.13 m/s), water brightness (5.33 m), Oxygen Dissolved (7.39 mg / l), and pH (7.13). The parameters of waters shows the condition of the waters are still good and not contaminated so it can support the existence and growth of coral reef ecosystems in Enggano Island waters. The wide of coral reef ecosystem in Enggano Island ± 5,097 hectares. The total economic value of coral reef ecosystem is Rp.176,901,038,387,- per year, that consisting of direct value Rp. 561,327,640,- per year; indirect value Rp. 46,342,500,000, - per year, the option value Rp. 2,516,077,983, - per year, the existence value Rp. 127.425.000.000,- and the bequest value Rp. 56,132,764,- per year.

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Community Structure Of Coral Reefs In Saebus Island, Sumenep District, East Java

E3S Web of Conferences ◽

10.1051/e3sconf/20183108013 ◽

2018 ◽

Vol 31 ◽

pp. 08013

Author(s):

Mada Rizmaadi ◽

Johannes Riter ◽

Siti Fatimah ◽

Riyan Rifaldi ◽

Arditho Yoga ◽

...

Keyword(s):

Community Structure ◽

Coral Reef ◽

Coral Reefs ◽

Satellite Imagery ◽

Good Condition ◽

Common Species ◽

Field Observations ◽

Coral Reef Ecosystem ◽

Coral Reef Ecosystems ◽

Reef Ecosystem

Increasing degradation coral reefs ecosystem has created many concerns. Reduction of this damage can only be done with good and proper management of coral reef ecosystem based on existing condition. The condition of coral reef ecosystem can be determined by assessing its community structure. This study investigates community structure of coral reef ecosystems around Saebus Island, Sumenep District, East Java, by using satellite imagery analysis and field observations. Satellite imagery analysis by Lyzenga methods was used to determine the observation stations and substrate distribution. Field observations were done by using Line Intercept Transect method at 4 stations, at the depth of 3 and 10 meters. The results showed that the percentage of coral reef coverage at the depth of 3 and 10 meters were 64.36% and 59.29%, respectively, and included in fine coverage category. This study found in total 25 genera from 13 families of corals at all stations. The most common species found were Acropora, Porites, and Pocillopora, while the least common species were Favites and Montastrea. Average value of Diversity, Uniformity and Dominancy indices were 2.94, 0.8 and 0.18 which include as medium, high, and low category, respectively. These results suggest that coral reef ecosystems around Saebus Island is in a good condition.

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CORAL REEF ECOSYSTEM MANAGEMENT IN AREA OF EASTERN COASTAL WATER CONSERVATION WEH ISLAND SABANG

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.29244/jitkt.v8i2.15842 ◽

2017 ◽

Vol 8 (2) ◽

pp. 781-790

Author(s):

Nurul Najmi ◽

Mennofatria Boer ◽

Fredinan Yulianda

Keyword(s):

Coral Reef ◽

Coral Reefs ◽

Water Conservation ◽

East Coast ◽

Group Discussion ◽

Coral Reef Ecosystem ◽

The Public ◽

The Status ◽

Coral Reef Ecosystems ◽

Reef Ecosystem

Coral reef ecosystem is important for coastal resources.Damage of Coral reefs resulted in de-gradation of population and fishes reef diversity. The East coast ofWeh Island in Sabang designated as conversation area that has aim to keep coral reefs from destructive utilization activites.The purpose of this study was to know the status of coral reefecosystemsmanagement in marine protected areaEast CoastWeh Island, Sabang and to analyze theattributessensitivelyfromthedimension ofecological,socio-economicand institutional sector.The methodthat used toknow the statusof the sustainablemanagementis RAPFISHanalysis.Dimensions oftheecologycan be known by measuring the coral growth used thePointInterceptTransect,reef fishabundanceusedUnderwaterVisualCensusFishmethod.Socio-economicand institutionaldimensionswill be collected through Focus Group Discussion(FGD) and help by questionnaires.Management status of coral reef ecosystems in the region of the East coast Weh islandmultidimensionallyindicatesthat it was quitesustainable.The most sensitiveattributeofthe managementisthe growth ofsaplings ofcorals,reef fishabundance,conflicts betweenfishermen,the public perceptionagainstthe abundance of fish, the role of the community, and the fishingmanagements.

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MANAGEMENT ON CORAL REEF ECOSYSTEM IN THE SIANTAN TENGAH DISTRICT, ANAMBAS ISLANDS

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.28930/jitkt.v7i1.9804 ◽

2015 ◽

Vol 7 (1) ◽

Author(s):

Rifki Aldi Ramadhani ◽

Ario Damar ◽

Hawis Madduppa

Keyword(s):

Coral Reef ◽

Ecosystem Management ◽

Multidimensional Index ◽

Coral Reef Ecosystem ◽

Reef Management ◽

Dimensional Scaling ◽

Coral Reef Management ◽

Coral Reef Ecosystems ◽

Reef Ecosystem ◽

Multi Dimensional Scaling

Coral reef ecosystem management in Siantan Tengah District, Anambas Islands need to be improved to obtain the optimal results. Currently, the coral reef ecosystem management is conducted sectorally, therefore, it can cause a damage on coral reef ecosystem. The purposes of this study were to analyze sustainability status of coral reefs managements in the District Central Siantan and to formulate the sustainability of coral reef ecosystem management. Multi Dimensional Scaling (MDS) with Rap-Insus COREMAG approach was used to analyze the sustainability status of coral reef management. The results showed that the sustainability status of coral reef management in Siantan Tengah District was sustainable with multidimensional index of 51.457. Dimensions that need to be improved to achieve the optimal management of coral reef ecosystems in a sustainable manner is social dimension to the value of sustainability by 42.324 and institutional dimensions of 49.85 which is classed as less sustainable. This results of this research are expected to be able to facilitate the stakeholders to arrange the sustainability of coral reef ecosystem management in the Siantan Tengah District. Keywords: coral reef management, sustainability analysis, Siantan Tengah District, Anambas Island, Multi Dimensional Scaling (MDS)

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Submarine groundwater discharge alters coral reef ecosystem metabolism

Proceedings of The Royal Society B Biological Sciences ◽

10.1098/rspb.2020.2743 ◽

2020 ◽

Vol 287 (1941) ◽

pp. 20202743

Author(s):

Nyssa J. Silbiger ◽

Megan J. Donahue ◽

Katie Lubarsky

Keyword(s):

Coral Reef ◽

Submarine Groundwater Discharge ◽

Structural Equation ◽

Groundwater Discharge ◽

High Tide ◽

Ecosystem Metabolism ◽

Coral Reef Ecosystem ◽

Submarine Groundwater ◽

Coral Reef Ecosystems ◽

Reef Ecosystem

Submarine groundwater discharge (SGD) influences near-shore coral reef ecosystems worldwide. SGD biogeochemistry is distinct, typically with higher nutrients, lower pH, cooler temperature and lower salinity than receiving waters. SGD can also be a conduit for anthropogenic nutrients and other pollutants. Using Bayesian structural equation modelling, we investigate pathways and feedbacks by which SGD influences coral reef ecosystem metabolism at two Hawai'i sites with distinct aquifer chemistry. The thermal and biogeochemical environment created by SGD changed net ecosystem production (NEP) and net ecosystem calcification (NEC). NEP showed a nonlinear relationship with SGD-enhanced nutrients: high fluxes of moderately enriched SGD (Wailupe low tide) and low fluxes of highly enriched SGD (Kūpikipiki'ō high tide) increased NEP, but high fluxes of highly enriched SGD (Kūpikipiki'ō low tide) decreased NEP, indicating a shift toward microbial respiration. pH fluctuated with NEP, driving changes in the net growth of calcifiers (NEC). SGD enhances biological feedbacks: changes in SGD from land use and climate change will have consequences for calcification of coral reef communities, and thereby shoreline protection.

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