scholarly journals Diversity and Species Composition of Sponges (Porifera: Demospongiae) in Reef Flat of Barranglompo Island

2020 ◽  
pp. 26-36
Author(s):  
Abdul Haris ◽  
Nurafni Nurafni ◽  
Dwi Nining Lestari ◽  
Maulana Hasania
Keyword(s):  
Coral Reef ◽  
Data Collection ◽  
Species Composition ◽  
Reef Flat ◽  
Marine Ecosystems ◽  
Seagrass Beds ◽  
Back Reef ◽  
Biological Resources ◽  
Coral Reef Ecosystems ◽  
Belt Transect

Sponge is one of the biota that makes up coastal and marine ecosystems, especially in coral reef ecosystems and seagrass beds in both tropical and subtropical waters. The lack of research and knowledge about sponges (Porifera; Demospongiae), especially in the reef flat ecosystem on Barranglompo Island, is considered necessary to be studied and equipped for research on marine biological resources in the future. This research was conducted in March-November 2019 on Barranglompo Island. The purpose of this study was to determine the diversity and species composition and density of sponges (Porifera: Demospongiae) in the reef flat of Barranglompo Island, Sangkarang District, Makassar City. The method used in sponge data collection is a belt transect starting from ± 50m of shoreline drawn perpendicular to the end of the back reef at each station. The diversity of sponge species found was 22 species belonging to the Demospongiae class. The diversity of sponges on Barranglompo Island is still quite diverse, with a fairly even distribution.

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

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.

scholarly journals POPULATION STRUCTURE OF Acanthaster planci ON THE REEF FLAT AT THE SOUTHERN PART OF BUNAKEN ISLAND

2013 ◽  
Vol 1 (1) ◽  
pp. 34
Author(s):  
Patritia Napitupulu ◽  
Hanny Tioho ◽  
Agung Windarto
Keyword(s):  
Population Structure ◽  
Coral Reef ◽  
Reef Flat ◽  
Adult Population ◽  
Acanthaster Planci ◽  
Night Time ◽  
Coverage Area ◽  
Reef Management ◽  
Coral Reef Management ◽  
Coral Reef Ecosystems

The information on population structure of Acanthaster planci in Bunaken National Park (BNP) is urgent to be presented in order to be considered in decision making especially on coral reef management in BNP. The objectives of  this study was to examine the  population structure of A. planci, represented by the diameter and weight, number of arms, while the density, distribution and types of coral predation by reef animals in the Southern part of Bunaken Island also observed. Data were collected at the three locations namely, front reef flat (FRF), middle reef flat (MRF) and back reef flat (BRF) with total coverage area of ​​100 x 50 meters. Sixty two individuals (41 at night and 21 at day time) were found with a body diameter ranging between 14 – 28 cm, whereas body weight ranged from 80 – 700 gr, with the number of arms between 9 until 17. The density of A. planci during day time was 0.0042 ind/m2, while the night time was 0.0082 ind/m2, moreover the animal is generally spread aggregated. The results of this study indicated that the population of A. planci in BNP was an adult population with density is still relatively normal, despite an alert sign for the sustainability of coral reef ecosystems in the BNP.

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

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  

scholarly journals Zooxanthellate, Sclerite-Free, and Pseudopinnuled Octocoral Hadaka nudidomus gen. nov. et sp. nov. (Anthozoa, Octocorallia) from Mesophotic Reefs of the Southern Ryukyus Islands

Diversity ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 176
Author(s):  
Yee Lau ◽  
James Reimer
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Shallow Water ◽  
Genetic Relationships ◽  
Marine Ecosystems ◽  
Marine Biota ◽  
Clade C ◽  
Coral Reef Ecosystems ◽  
Symbiodinium Clade ◽  
Water Coral

Shallow water coral reefs are the most diverse marine ecosystems, but there is an immense gap in knowledge when it comes to understanding the diversity of the vast majority of marine biota in these ecosystems. This is especially true when it comes to understudied small and cryptic coral reef taxa in understudied ecosystems, such as mesophotic coral reef ecosystems (MCEs). MCEs were reported in Japan almost fifty years ago, although only in recent years has there been an increase in research concerning the diversity of these reefs. In this study we describe the first stoloniferous octocoral from MCEs, Hadaka nudidomus gen. nov. et sp. nov., from Iriomote and Okinawa Islands in the southern Ryukyus Islands. The species is zooxanthellate; both specimens host Cladocopium LaJeunesse & H.J.Jeong, 2018 (formerly Symbiodinium ‘Clade C’) and were collected from depths of ~33 to 40 m. Additionally, H. nudidomus gen. nov. et sp. nov. is both sclerite-free and lacks free pinnules, and both of these characteristics are typically diagnostic for octocorals. The discovery and morphology of H. nudidomus gen. nov. et sp. nov. indicate that we still know very little about stoloniferous octocoral diversity in MCEs, their genetic relationships with shallower reef species, and octocoral–symbiont associations. Continued research on these subjects will improve our understanding of octocoral diversity in both shallow and deeper reefs.

scholarly journals HARD CORAL (SCLERACTINIA) RECRUITMENT BASED ON THE GEOMORPHOLOGY ZONE IN BINTAN ISLAND WATERS, RIAU ISLANDS

2021 ◽  
Vol 13 (2) ◽  
pp. 269-281
Author(s):  
Nurhasima ◽  
Aditya Hikmat Nugraha ◽  
Dedy Kurniawan
Keyword(s):  
Coral Reef ◽  
Reef Flat ◽  
Sampling Method ◽  
Life Form ◽  
T Test ◽  
Reef Slope ◽  
Hard Coral ◽  
Coral Recruitment ◽  
Line Parallel ◽  
Coral Reef Ecosystems

The health of coral reef ecosystems can be seen through the emergence of coral recruitment. Aim of this research was to compared the scleractinia coral recruitment list based on genus, life form, and variations in size of the scleractinia coral recuit in the waters of Kampung Baru Lagoi and Teluk Bakau Village, Bintan Regency by geomorfology zone. The research was conducted using a Purposive sampling method in consideration of the presence of scleractinia coral in reef flat and reef slope areas using a 1x1 m square frame mounted along a 70 m transverse line parallel to the shoreline. Research has found 164 colonies of 24 genus dominated by Favia and Favites. Based on the most extensive life form of Coral encrusting and Coral massive variations in size 4.5-6 cm or medium category. The results of t test showed that the geomorphological differences in the research locations did not have a significant impact on the abundance of corals recruitment

scholarly journals Inventory of damage to coral reefs ecosystem in waters of Bungkutoko Island, Kendari City and Barrang Lompo Island, Makassar City

2018 ◽  
Vol 2 (2) ◽  
pp. 67 ◽  
Author(s):  
Mosriula Mosriula ◽  
Jaya Jaya ◽  
Muhammad Hamsir
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Marital Status ◽  
Damage Index ◽  
Coastal Areas ◽  
Seagrass Beds ◽  
Research Results ◽  
Biological Resources ◽  
Ecosystem Control

Coastal areas and sea have the potential biological resources large enough, because supported by three main ecosystem the ecosystem mangrove, seagrass beds and coral reefs. To maintain the existence of the ecosystem, control in coastal areas need to conducted one of them is inventory damage ecosystem especially ecosystem coral reefs. On the island of Bungkutoko lack or information on the coral reefs ecosystem is the island Barrang Lompo in addition the information and data on the ecosystem.  The purpose of this research is to get data teachers’ marital status and a condition of damage the ecosystem to coral reefs as a second the island. The research results obtained, a covering of coral reef island Bungkutoko depth 5m and 10m namely 36,47% and 41,67% category ‘being’. The island Barrang Lompo station 1 the depth of 5m and 10m namely 38,67% and 42,53% category ‘being’, station 2  covering 23,27% category ‘broken’. To scattery if coral reefs Bungkutoko island 231.31 ha, the Barrang Lompo island 127.47 ha. The level of damage/index mortalities on the island of Bungkutoko depth 5m and 10m namely 0,5593% and 0,6201% category ‘being’. The island Barrang Lompo station 1 depth 5m and 10m namely 0,6011% and 0,5504% category ‘being’, station 2 the level of damage/index mortalities 0,7326% category ‘high’.

scholarly journals Status of coral reefs in Antigua & Barbuda: using data to inform management

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e9236
Author(s):  
Ruleo Camacho ◽  
Sophia Steele ◽  
Shanna Challenger ◽  
Mark Archibald
Keyword(s):  
Coral Reef ◽  
Data Collection ◽  
Marine Conservation ◽  
Caribbean Region ◽  
North East ◽  
Management Actions ◽  
Coral Reef Ecosystems ◽  
The Government ◽  
Marine Areas ◽  
Future Management

The nation of Antigua and Barbuda has experienced major degradation of its coral reef ecosystems over the past 40+ years. The primary drivers of this degradation are multiple and are highly linked to anthropogenic influences, including over-exploitation and poor management of marine resources. The effectiveness of management actions in marine protected areas (MPAs) has often been hampered by a lack of data to inform management recommendations. This was emphasized by The Nature Conservancy’s (TNC) Coral Reef Report Card which highlighted not only the lack of data collection in Antigua and Barbuda and other Caribbean nations, but also illustrated how spatially dispersed available datasets are. The government of Antigua and Barbuda recognized the need for a marine data collection program to better inform the designation and management of MPAs as a tool to improve the health of the marine ecosystems. The Atlantic Gulf Rapid Reef Assessment (AGRRA) protocol has been identified as a means to address planning and management for marine areas. Three AGRRA surveys have been conducted in the years following the TNC 2016 report, in previously established managed areas: North East Marine Management Area (NEMMA) in 2017 and Nelson Dockyard National Park (NDNP) in 2019 as well as areas outlined for future management (Redonda in 2018). Our surveys were conducted to provide updated datasets to inform management for the aforementioned areas. While the results of these surveys mirror the underlying poor coral reef-health conditions, which have been shown to exist within the Caribbean region, they also highlight intra-site variation that exists within each survey location. This knowledge can be crucial in guiding management decisions in these marine areas, through zoning and other management prescriptions. Additionally, the marine surveys conducted around Redonda established useful marine baselines to aid in monitoring the island’s recovery following removal of terrestrial invasive species. This article provides an overview of data collected using the AGRRA methodology in marine zones across Antigua and Barbuda which have current or future management prescriptions and provides recommendations to demonstrate the data’s future utilization for marine conservation and management.

scholarly journals Seabird-Derived Nutrients Supply Modulates the Trophic Strategies of Mixotrophic Corals

2022 ◽  
Vol 8 ◽  
Author(s):  
Martin Thibault ◽  
Fanny Houlbreque ◽  
Nicolas N. Duprey ◽  
Noémie Choisnard ◽  
David P. Gillikin ◽  
...  
Keyword(s):  
Coral Reef ◽  
Resource Sharing ◽  
Reef Flat ◽  
Nitrogen Isotope ◽  
Nutrient Supply ◽  
Global Changes ◽  
Pocillopora Damicornis ◽  
Sw Pacific ◽  
Island Communities ◽  
Coral Reef Ecosystems

The ability of corals to modulate their nutrition strategy in response to variable nutrient supply remains poorly understood, limiting our understanding of energy flow in coral reef ecosystems and thus our comprehension of their resilience to global changes. We used a naturally occurring nutrient gradient along the reef flat of two seabird-inhabited islets in the SW Pacific to characterize spatiotemporal fluctuations in coastal nutrient availability, and how it modulates the trophic response of the mixotrophic coral Pocillopora damicornis. The clear gradients in dissolved [NOx] and δ15N values of macroalgae and both P. damicornis tissues and symbionts observed along the reef flat during the dry and the rainy season revealed that seabird-derived-N is supplied year-round to the reef flat. Yet, nitrogen isotope values of macroalgae show that the seabirds’ effect on coral reefs varies with sites and seasons. Metrics derived from the SIBER framework revealed that coral nutrition seasonally favored autotrophy when exposed to higher seabird guano concentrations and at inshore stations, while heterotrophy dominated in corals less exposed to seabird-derived nutrient supply. P. Damicornis is therefore able to cope with large changes in nitrogen supply induced by seabird island communities by switching between autotrophy and heterotrophy. These results shed light on the flexibility of resource sharing within the coral-algae symbiosis and highlight the importance of seabird populations to the functioning of coral reef ecosystems.

scholarly journals KELIMPAHAN MEGABENTOS SEBAGAI INDIKATOR KESEHATAN KARANG DI PERAIRAN BILIK, TAMAN NASIONAL BALURAN, INDONESIA

2020 ◽  
Vol 5 (2) ◽  
pp. 181-194
Author(s):  
Bachtiar Wahyu Mutaqin ◽  
Emy Puspita Yuendini ◽  
Bagas Aditya ◽  
Isfi Nurafifa Rachmi ◽  
Muhammad Ilham Fathurrizqi ◽  
...  
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
National Park ◽  
Sea Urchins ◽  
Good Condition ◽  
Health Indicators ◽  
Environmental Damage ◽  
Sea Star ◽  
Coral Reef Ecosystems ◽  
Belt Transect

Ekosistem terumbu karang adalah ekosistem laut yang sangat rentan oleh kerusakan lingkungan. Terumbu karang di perairan Bilik, Taman Nasional Baluran merupakan contoh ekosistem terumbu karang yang mengalami ancaman kerusakan lingkungan akibat perubahan iklim dan aktivitas manusia. Salah satu metode yang dapat digunakan untuk memonitor kesehatan terumbu karang adalah dengan melihat kelimpahan megabentos dalam ekosistem terumbu karang. Oleh karena itu, penelitian ini memiliki tujuan untuk mengetahui kesehatan ekosistem terumbu karang dengan melihat kelimpahan megabentos di perairan Bilik, Taman Nasional Baluran. Metode yang digunakan dalam inventarisasi megabentos adalah dengan Benthos Belt Transect dan analisis video di Blok Sijile dan Blok Jeding di Perairan Bilik. Hasil pengamatan menunjukkan bahwa di Blok Sijile tidak ditemukan ekosistem terumbu karang dan megabentos. Sementara itu di Blok Jeding ditemukan ekosistem terumbu karang dengan megabentos berupa bulu babi dan bintang laut biru. Kelimpahan bulu babi di dan bintang laut biru adalah 0-0,14 individu/m2. Kondisi tersebut menunjukkan bahwa kesehatan ekosistem terumbu karang di Blok Jeding perairan Bilik Sijile masih baik, namun perlu mendapat perhatian khusus karena sebagian area terumbu karang mengalami pemutihan akibat aktivitas perikanan yang tidak ramah lingkungan.MEGABENTHOS ABUNDANCE AS CORAL HEALTH INDICATORS IN BILIK WATERS, BALURAN NATIONAL PARK, INDONESIA. Coral reef ecosystems are marine ecosystems that are prone to environmental damage. Coral reefs in Bilik waters, Baluran National Park, are examples of coral reef ecosystems that are threatened by environmental damage due to climate change and human activities. One of the methods for health monitoring of coral reefs is by looking at the abundance of megabenthos in coral reef ecosystems. Therefore, this study aims to determine the health of coral reef ecosystems by looking at the abundance of megabenthos in Bilik waters, Baluran National Park. We used Benthos Belt Transect and video analysis to identify the spatial distribution and number of megabenthos in Sijile Block and Jeding Block, Bilik waters. The results showed that in Sijile Block, there were no coral reef neither megabenthos ecosystems. Meanwhile, in Jeding Block, there was a coral reefs ecosystem with megabenthos in the form of sea urchins and blue starfish. The abundance of sea urchins and the blue sea star in Jeding Block was about 0-0.14 individual/m2. These conditions indicate that the health of the coral reef ecosystem in Jeding Block, Bilik waters was still in good condition, even though it still needs special attention related to coral bleaching as a consequence of fisheries activities that are not environmentally friendly.

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