Fluktuasi Kondisi Megabentos di Perairan Ternate, Maluku Utara

The coral reef was a habitat for several groups of biota that live in this ecosystem. Some species or group species of benthic fauna are known to be ecologically important and others are economically important so that they can be used as indicators to assess reef health. Research on megabenthic fauna in Ternate and its surrounding waters, North Maluku, was carried out in 2012, 2015, 2016, 2017 and 2018 at fourteen permanent stations. The purpose of this study was to determine the fluctuations in several megabenthic faunae temporarily. Data were collected using the modified Belt Transect Method, namely Benthos Belt Transek method. Eight species or groups of megabenthic fauna in the coral reef have been observed. The highest distribution and abundance of megabenthic fauna was coral polyps eating-snail of Drupella spp. The species wealth index decreased from 2012 to 2017 (1.17 to 1.05) but experienced an increase in 2018 (to 1.29). The relatively high dominance found in the megabenthic fauna community was observed in 2015, 2016 and 2017, while in 2012 and 2018 it had relatively low dominance. The megabenthic fauna community observed in 2012 and 2018 has relatively high diversity, whereas in 2015, 2016 and 2017, the diversity is relatively low. The megabenthic fauna community observed in 2012 and 2018 has spread evenly, while in 2015, 2016 and 2017, the relative prevalence of fauna is relatively uneven. Terumbu karang merupakan habitat bagi beberapa kelompok biota yang hidup di dalamnya. Beberapa spesies atau kelompok spesies bentos diketahui bernilai ekologis pentingdan yang lainnya bernilai ekonomis penting sehingga dapat dijadikan sebagai indikator untuk menilai kesehatan terumbu. Penelitian fauna megabentos di perairan Ternate dan sekitarnya, Maluku Utara dilakukan pada tahun 2012, 2015, 2016, 2017 dan 2018 pada empat belas stasiun permanen. Tujuan penelitian ini adalah untuk mengetahui fluktuasi beberapa indeks ekologi megabentos dari tahun ke tahun. Pengambilan data menggunakan metode Benthos Belt Transect yang dimodifikasi dari Belt Transect Method. Sebanyak delapan kelompok jenis atau kelompok jenis megabentos pada perairan terumbu karang telah diamati. Sebaran dan kelimpahan megabentos tertinggi adalah siput pemakan polip karang Drupella spp. Indeks kekayaan spesies mengalami penurunan tahun 2012 hingga 2017 (1,17 menjadi 1,05), namun mengalami peningkatan pada tahun 2018 (menjadi 1,29). Dominansi yang relatif tinggi dijumpai pada komunitas megabentos yang teramati pada tahun 2015, 2016 dan 2017, sedangkan pada tahun 2012 dan 2018 memiliki dominansi yang relatif rendah. Komunitas megabentos yang teramati pada tahun 2012 dan 2018 memiliki keanekaragaman yang relatif tinggi, sedangkan pada tahun 2015, 2016 dan 2017 berkeanekaragaman relatif rendah. Komunitas megabentos yang teramati pada tahun 2012 dan 2018 memiliki kemerataan fauna yang relatif merata, sedangkan pada tahun 2015, 2016 dan 2017 memiliki kemerataan fauna yang relatif tidak merata.

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FLUKTUASI KEPADATAN MEGABENTOS DI PERAIRAN KENDARI, SULAWESI TENGGARA

BERITA BIOLOGI ◽

10.14203/beritabiologi.v19i3b.3902 ◽

2020 ◽

Vol 19 (3B) ◽

Author(s):

Ucu Yanu Arbi ◽

Paiga Hanurin Sawonua ◽

Hendrik Alexander William Cappenberg

Keyword(s):

Coral Reef ◽

Density Fluctuation ◽

Acanthaster Planci ◽

Economic Values ◽

Or Groups ◽

Significant Difference ◽

Belt Transect ◽

The Mean ◽

Suitable Habitats ◽

Group Species

Coral reef is an ecosystem which provides suitable habitats for sgroups of biota that has important ecological and economic values which can be used as bio-indicators to assess the health of the environment. Research on megabenthic fauna in Kendari waters and its surroundings, Southeast Sulawesi was carried out at nine permanent stations in 2015 to 2018. The data was collected using the Benthos Belt Transect method that modified from the Belt Transect method on 8 types or groups of megabenthos in these waters. The purpose of this study was to determine the density fluctuation of megabenthic fauna over the years. The mean density of individuals found at each station during the study did not differ significantly. The Kruskal-Wallis test on density of megabenthic fauna during this period of times did not show a significant difference (H = 28.511 > df 7 = 14.067). Drupella spp. was the group species of megabenthic fauna with the highest density each year (1,079-1,738 ind/ha), while lobster was the group species of megabenthic fauna with the lowest density each year (0 - 39.7 ind/ha). The crown of thorns starfish Acanthaster planci had the highest fluctuation where density increased from 28.3 to 71.4 ind/ha.

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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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The coral reef health index in Teluk Sebong, Bintan Island

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/763/1/012066 ◽

2021 ◽

Vol 763 (1) ◽

pp. 012066

Author(s):

Dedy Kurniawan ◽

Try Febrianto ◽

Jumsurizal ◽

Risandi Dwirama Putra

Keyword(s):

Coral Reef ◽

Health Index ◽

Reef Health

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A coral reef health study and its problem in Leti, Moa and Wetar Island, Mollucas Province

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/777/1/012003 ◽

2021 ◽

Vol 777 (1) ◽

pp. 012003

Author(s):

D D Pelasula ◽

R Alik ◽

F Ruli ◽

F D Hukom ◽

La Pay ◽

...

Keyword(s):

Coral Reef ◽

Health Study ◽

Reef Health

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FORAMINIFER-BASED CORAL REEF HEALTH ASSESSMENT FOR SOUTHWESTERN ATLANTIC OFFSHORE ARCHIPELAGOS, BRAZIL

The Journal of Foraminiferal Research ◽

10.2113/gsjfr.42.2.169 ◽

2012 ◽

Vol 42 (2) ◽

pp. 169-183 ◽

Cited By ~ 10

Author(s):

C. F. Barbosa ◽

B. P. Ferreira ◽

J. C. S. Seoane ◽

P. Oliveira-Silva ◽

A. L. B. Gaspar ◽

...

Keyword(s):

Coral Reef ◽

Health Assessment ◽

Southwestern Atlantic ◽

Reef Health

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Status of Coral Reefs in the Water of Spermonde, Makassar, South Sulawesi

E3S Web of Conferences ◽

10.1051/e3sconf/202132403007 ◽

2021 ◽

Vol 324 ◽

pp. 03007

Author(s):

Ni Wayan Purnama Sari ◽

Rikoh Manogar Siringoringo ◽

Muhammad Abrar ◽

Risandi Dwirama Putra ◽

Raden Sutiadi ◽

...

Keyword(s):

Coral Reef ◽

Coral Reefs ◽

Coral Cover ◽

Public Awareness ◽

Live Coral ◽

Health Index ◽

Point Count ◽

Live Coral Cover ◽

Reef Health ◽

Index Value

Observations of the condition of coral reefs have been carried out in Spermonde waters from 2015 to 2018. The method used in this observation uses Underwater Photo Transect (UPT), and the data obtained is analyzed using CPCe (Coral Point Count with Excel Extensions) software. The results show that the percentage of coral cover has increased from year to year. The percentage of live coral cover in 2015 was 19.64%, 23.60 in 2016, 23.72% in 2017, and 27.83% in 2018. The increase in live coral cover from year to year is thought to occur due to the availability of nutrients. or increasing public awareness, considering this location is one of the most famous tourist attractions in Makassar. Coral reef health index values can be used to classify coral reef health. Through the analysis of the coral reef health index, an index value of 4 was obtained, which means that the condition of the coral reefs is in the “moderate” category.

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KEPADATAN MEGABENTOS PADA EKOSISTEM TERUMBU KARANG DI PERAIRAN DESA PERLANG BANGKA TENGAH, BANGKA BELITUNG

Akuatik Jurnal Sumberdaya Perairan ◽

10.33019/akuatik.v13i2.1621 ◽

2019 ◽

Vol 13 (2) ◽

pp. 173-177

Author(s):

Arham Hafidh Akbar ◽

Sudirman Adibrata ◽

Wahyu Adi

Keyword(s):

Coral Reef ◽

Data Collection ◽

Coral Cover ◽

Live Coral ◽

Coral Reef Ecosystems ◽

Tridacna Maxima ◽

Belt Transect ◽

Tridacna Gigas ◽

Drupella Cornus ◽

Diadema Setosum

This study aims to analyze the density of megabenthos in coral reef ecosystems in the waters of Perlang Village. This research was conducted in November 2019 in the waters of Perlang Village with the megabentos data collection method using the Bentos Belt Transect (BBT) method based on COREMAP CTI LIPI (2017) with 5 data collection stations. The results found 603 individuals consisting of 9 species from 4 megabenthos families in coral reef ecosystems. Species found at the study site are Diadema setosum, Diadema antillarium (Familli Deadematidae), Drupella cornus, Drupella rugosa (Family Murcidae), Trochus sp, Trochus conus, Tectus pyramis (Family Trochidae), Tridacna gigas, and Tridacna maxima (Family Tridacnidae) . The highest attendance percentage of all stations was obtained by Diadema setosum of 47.93% (289 people). Percentage of live coral cover from 5 observation stations ranged from 57.44% - 91.78%. Observation pensions that received the highest percentage of cover values were at pension 2 with 91.78% in the very good category.

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Bioeroding sponge assemblages: the importance of substrate availability and sediment

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315418000164 ◽

2018 ◽

Vol 99 (2) ◽

pp. 343-358 ◽

Cited By ~ 3

Author(s):

Joseph Marlow ◽

Christine H.L. Schönberg ◽

Simon K. Davy ◽

Abdul Haris ◽

Jamaluddin Jompa ◽

...

Keyword(s):

Coral Reef ◽

Environmental Factors ◽

Spatial Variation ◽

Environmental Conditions ◽

Sponge Species ◽

Coral Mortality ◽

Substrate Availability ◽

Abiotic Conditions ◽

Assemblage Composition ◽

Reef Health

Despite global deterioration of coral reef health, not all reef-associated organisms are in decline. Bioeroding sponges are thought to be largely resistant to the factors that stress and kill corals, and are increasing in abundance on many reefs. However, there is a paucity of information on how environmental factors influence spatial variation in the distribution of these sponges, and how they might be affected by different stressors. We aimed to identify the factors that explained differences in bioeroding sponge abundance and assemblage composition, and to determine whether bioeroding sponges benefit from the same environmental conditions that can contribute towards coral mortality. Abundance surveys were conducted in the Wakatobi region of Indonesia on reefs characterized by different biotic and abiotic conditions. Bioeroding sponges occupied an average of 8.9% of available dead substrate and variation in abundance and assemblage composition was primarily attributed to differences in the availability of dead substrate. Our results imply that if dead substrate availability increases as a consequence of coral mortality, bioeroding sponge abundance is also likely to increase. However, bioeroding sponge abundance was lowest on a sedimented reef, despite abundant dead substrate. This suggests that not all forms of coral mortality will benefit all bioeroding sponge species, and sediment-degraded reefs are likely to be dominated by a few resilient bioeroding sponge species. Overall, we demonstrate the importance of understanding the drivers of bioeroding sponge abundance and assemblage composition in order to predict possible impacts of different stressors on reefs communities.

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