scholarly journals Kondisi Substrat Dasar Perairan Cagar Alam Pulau Sempu, Kabupaten Malang

2018 ◽  
Vol 5 (1) ◽  
pp. 77
Author(s):  
Oktiyas Muzaky Luthfi ◽  
Firly Yulianto ◽  
Sanydo Pandapotan Caesar Pangaribuan ◽  
Dimas Bagus Dwi Putranto ◽  
Dimas Syarif Alim ◽  
...  
Keyword(s):  
Coral Reef ◽  
Nature Reserve ◽  
Soft Coral ◽  
Hard Coral ◽  
Bottom Substrate ◽  
Coral Coverage ◽  
Natural Factors ◽  
One Year

The aim this study was to determine the condition of bottom substrate base of Sempu Island Nature Reserve of Malang that was very important to know the coral reef composition to support living creatures in this area. The research was conducted on December 8-9, 2017, the substrates data was taken by using Point Intercept Transect (PIT) for 100 m along of coast of Sempu Island (Reef Check Indonesia), the transect was divided into four parts 20 meters each segment and 5 m blank between segments.  The data was taken into three stations, they were Teluk Semut 1 , Teluk Semut 2, and Watu Meja. The results of this study indicate that the basic substrate of waters at Sempu Island Nature Reserve is divided into two: living (HC = Hard Coral, SC = Soft Coral, NIA = Nutrien Indicator Algae, SP = Sponge and OT = Other) and non-living (RKC = Ricently Killed Coral, RC = Rock, RB = Rubble, SD = Sand and SI = Silt). Teluk Semut Station 1 was dominated by the rubble (39%), Teluk Semut 2 station and Watu Meja were dominated by hard coral (53%). In conclusion, from three monitored stations showed that the life coral percentage in Sempu Island water was significane changed during last one year where in Teluk Semut 1 the coral coverage decreased to 21.75%, while in Teluk Semut 2 and Watu Meja was increased up to 42.38% and 25.5% respectively. The natural and non-natural factors may have influenced the changed of substrate cover in Sempu Island water during this last year.

scholarly journals Impact of cyclones on hard coral and metapopulation structure, connectivity and genetic diversity of coral reef fish

Coral Reefs ◽  
2021 ◽  
Author(s):  
Gabriele Gerlach ◽  
Philipp Kraemer ◽  
Peggy Weist ◽  
Laura Eickelmann ◽  
Michael J. Kingsford
Keyword(s):  
Genetic Diversity ◽  
Coral Reef ◽  
Genetic Structure ◽  
Reef Fish ◽  
Coral Reef Fish ◽  
Population Genetic Study ◽  
Hard Coral ◽  
Great Loss ◽  
Metapopulation Structure ◽  
The Impact

AbstractCyclones have one of the greatest effects on the biodiversity of coral reefs and the associated species. But it is unknown how stochastic alterations in habitat structure influence metapopulation structure, connectivity and genetic diversity. From 1993 to 2018, the reefs of the Capricorn Bunker Reef group in the southern part of the Great Barrier Reef were impacted by three tropical cyclones including cyclone Hamish (2009, category 5). This resulted in substantial loss of live habitat-forming coral and coral reef fish communities. Within 6–8 years after cyclones had devastated, live hard corals recovered by 50–60%. We show the relationship between hard coral cover and the abundance of the neon damselfish (Pomacentrus coelestis), the first fish colonizing destroyed reefs. We present the first long-term (2008–2015 years corresponding to 16–24 generations of P. coelestis) population genetic study to understand the impact of cyclones on the meta-population structure, connectivity and genetic diversity of the neon damselfish. After the cyclone, we observed the largest change in the genetic structure at reef populations compared to other years. Simultaneously, allelic richness of genetic microsatellite markers dropped indicating a great loss of genetic diversity, which increased again in subsequent years. Over years, metapopulation dynamics were characterized by high connectivity among fish populations associated with the Capricorn Bunker reefs (2200 km2); however, despite high exchange, genetic patchiness was observed with annual strong genetic divergence between populations among reefs. Some broad similarities in the genetic structure in 2015 could be explained by dispersal from a source reef and the related expansion of local populations. This study has shown that alternating cyclone-driven changes and subsequent recovery phases of coral habitat can greatly influence patterns of reef fish connectivity. The frequency of disturbances determines abundance of fish and genetic diversity within species.

BIODIVERSITI DAN PEMULIHARAAN TERUMBU KARANG DI TIGA BUAH PULAU, MELAKA (Biodiversity and Conservation of Coral Reefs in Three Islands in Malacca)

2021 ◽  
Vol 22 (1) ◽  
pp. 180-197
Author(s):  
SYAIMAK ISMAIL ◽  
MOHAMAD SAUPI BIN ISMAIL ◽  
MUHAMMAD SAIFUL ISLAM ISMAIL ◽  
AEMY AZIZ
Keyword(s):  
Coral Reefs ◽  
Biodiversity Conservation ◽  
Soft Coral ◽  
Good Condition ◽  
Scuba Diving ◽  
Field Studies ◽  
The State ◽  
Hard Coral ◽  
Wide Range ◽  
State Museum

In the state of Melaka, there are eighteen islands recorded by the Melaka State Museum Corporation (PERZIM). Part of this island serves as a tourist island, and developed islands are also uninhabited islands. However, three islands are recorded to have amazing coral reefs that are still in good condition. The Penang Batu Maung Fisheries Research Institute (AkuaTAR) has conducted a study on the biodiversity of coral reefs around the waters of Pulau Dodol, Pulau Serimbun, and Pulau Undan. AkuaTAR researchers are using scuba diving methods, and at the same time, they did conservation on coral reefs that have been identified in the waters of the Straits of Melaka. The objective of this study is to record the types of community forms such as living corals and identify the species of coral reefs found in three islands in the state of Melaka in Pulau Undan, Pulau Dodol, and Pulau Serimbun. The study also implemented method observation by conducting field studies on the islands involved by doing scuba diving. Results and discussion of the search, these three islands are located in very clean, uninhabited waters. They have a wide range of coral biodiversity using soft coral reefs and hard coral reefs. The study also found that the three islands in the state have the largest coral reefs in the waters of the Straits of Melaka. Keywords: Biodiversity; Conservation; Coral; Three island; Melaka

Chlorinated and brominated persistent compounds in hard coral, soft coral, and parrotfish from remote Mascarene islands

Chemosphere ◽  
2021 ◽  
Vol 267 ◽  
pp. 129316
Author(s):  
Veronica van der Schyff ◽  
Marinus du Preez ◽  
Karin Blom ◽  
Nee Sun Choong Kwet Yive ◽  
Jana Klánová ◽  
...  
Keyword(s):  
Soft Coral ◽  
Hard Coral ◽  
Mascarene Islands

scholarly journals Declining abundance of coral reef fish in a World-Heritage-listed marine park

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Mathew A. Vanderklift ◽  
Russell C. Babcock ◽  
Fabio Boschetti ◽  
Michael D. E. Haywood ◽  
Richard D. Pillans ◽  
...  
Keyword(s):  
Coral Reef ◽  
Protected Areas ◽  
Reef Fish ◽  
Coral Reef Fish ◽  
Temporal Trends ◽  
World Heritage ◽  
Hard Coral ◽  
Absolute Abundance ◽  
Marine Park ◽  
Recreation Zone

Abstract One of the most robust metrics for assessing the effectiveness of protected areas is the temporal trend in the abundance of the species they are designed to protect. We surveyed coral-reef fish and living hard coral in and adjacent to a sanctuary zone (SZ: where all forms of fishing are prohibited) in the World Heritage-listed Ningaloo Marine Park during a 10-year period. There were generally more individuals and greater biomass of many fish taxa (especially emperors and parrotfish) in the SZ than the adjacent recreation zone (RZ: where recreational fishing is allowed) — so log response ratios of abundance were usually positive in each year. However, despite this, there was an overall decrease in both SZ and RZ in absolute abundance of some taxa by up to 22% per year, including taxa that are explicitly targeted (emperors) by fishers and taxa that are neither targeted nor frequently captured (most wrasses and butterflyfish). A concomitant decline in the abundance (measured as percentage cover) of living hard coral of 1–7% per year is a plausible explanation for the declining abundance of butterflyfish, but declines in emperors might be more plausibly due to fishing. Our study highlights that information on temporal trends in absolute abundance is needed to assess whether the goals of protected areas are being met: in our study, patterns in absolute abundance across ten years of surveys revealed trends that simple ratios of abundance did not.

Biomechanics and mass mortality of erect bryozoans on a coral reef

1999 ◽  
Vol 79 (4) ◽  
pp. 745-747 ◽  
Author(s):  
David K.A. Barnes ◽  
Mark Whittington
Keyword(s):  
Coral Reef ◽  
Structural Integrity ◽  
Local Population ◽  
Lower Proportion ◽  
Size Spectrum ◽  
Sample Population ◽  
Hard Substratum ◽  
Periodic Force ◽  
The Mean ◽  
One Year

The bryozoan Cigclisula sp., is a heavily calcified erect species which occurs abundantly in the shallow sublittoral coral reef at Quilaluia Island, Quirimba Archipelago, northern Mozambique. It grows in an arborescent bilaminate form termed adeoniform on the undersides of coral heads or other available bioconstructed hard substratum. The geography and bathymetry of the area results in periodic high and complex current regimes often carrying water borne debris. If this periodic force overcomes the structural integrity of Cigclisula sp. either the outermost branches break or the colony topples at the base. The local population was dominated by young individuals: nearly 40% of the sample population had ten branches or fewer and less than 10% had more than 50 branches (these could be ascertained as young due to the lower proportion of damaged colonies with ≤10 branches; Figure 1). The only size group with no damaged specimens (branch breakage) were those with ≤5 branches. The mean proportion of branches broken significantly increased with increasing colony size. After one year a population of Cigclisula sp., initially comprising 30 colonies (encompassing the entire size spectrum of colonies), consisted of just one small specimen.

scholarly journals Sebaran dan Keanekaragaman Ikan Konsumsi pada Ekosistem Terumbu Karang di Teluk Majene, Provinsi Sulawesi Barat

Jurnal Airaha ◽  
2020 ◽  
Vol 9 (02) ◽  
pp. 105-115
Author(s):  
Andi Arham Atjo ◽  
Reski Fitriah
Keyword(s):  
Soft Coral ◽  
Hard Coral ◽  
Dead Coral ◽  
Visual Census

Tujuan penelitian ini adalah untuk  mengetahui Jenis dan sebaran ikan target konsumsi di Teluk Majene Prov, Sulawesi barat. Kondisi terumbu karang didata dengan menggunakan metode Transek segmen atau Point Intersept Transect  (PIT). Transek tersebut dibentangakan sesuai dengan titik yang telah ditentukan selanjutnya seorang penyelam melakukan penyelaman sepanjang transek 50 meter dan mencatat di kertas tahan air (underwater paper) substrat ataupun bentos yang berada tepat di bawah transek garis. Sedangkan jarak interval (point) pencatatan substrat ataupun bentos adalah setiap 50 cm ( Hill dan Wilkinson, 2004). Adapun kategori yang amati tiap titik 0,5 m yaitu Hard Coral (HC), Soft Coral (SC), Rubble (R), Dead Coral (DC),  Dead Coral Algae (DCA), dan Sand (S). Kelimpahan ikan target yang menghuni ekosistem terumbu karang didata dengan menggunakan metode sensus secara langsung  (Visual Census Method) (English et al.,1994), secara teknis pendataan ini dilakukan dengan metode belt transek.. Hasil dari penelitian ini menunjukkan bahwa Terdapat 28 jenis ikan karang yang merupakan target atau konsumsi penting di Teluk Majene. Jenis ikan yang terbanyak adalah dari jenis Caesio sp. Sedangkan untuk sebarannya, ikan target terdapat di seluruh ekosistem terumbu karang Teluk Majene. Sebaran yang terbanyak ada pada lokasi stasiun 6 tepatnya di Lingkungan Pasarang, Kelurahan Totoli.

scholarly journals Relationship Between Species Composition of Butterflyfishes and Coral Cover (Study case: Taka Bonerate National Park)

2020 ◽  
Vol 25 (3) ◽  
pp. 121-126
Author(s):  
Ana Faricha ◽  
Isa N. Edrus ◽  
Sasanti R. Suharti ◽  
Rizkie S. Utama ◽  
Agus Budiyanto ◽  
...  
Keyword(s):  
Coral Reef ◽  
Species Composition ◽  
National Park ◽  
Diversity Index ◽  
Coral Cover ◽  
Benthic Communities ◽  
Reef Environment ◽  
Dietary Specialization ◽  
Coral Coverage ◽  
Specific Species

The coral reef environment has a strong influence on associated organisms such as fishes, mollusks, and others. Wherein, the butterflyfishes are marine fishes which closely associated with the tropic group as dietary specialization i.e. obligate coral feeder, facultative, and generalist. The obligate may respond only to change in preferred corals and not indicate others. However, generalist show in different response in habitat deteriorates and may allow switching feeding to a less preferred one. Many questions remain about food specific at the species level which may potentially as bio-indicator for coral conditions. Here, we studied the species composition among coral coverage. We explore the environmental degradation in Taka Bonerate National Park impact on food resources and fishes especially for butterflyfishes community. This study focused on family Chaetodontidae with UVC method and UPT method for coral cover. This study was carried out at Taka Bonerate National Park, South Sulawesi between May and June 2019. There were 342 individuals observed and dominated by Chaetodon kleinii, Hemitaurichthys polylepis, Heniochus chrysostomus, C. lunulatus, C. melannotus, C punctatofasciatus, and Forcipiger flavissimus. However, we found a site with diversity index and coral cover has across conditions. Whilst, these benthic communities mostly dominated by Acropora, which may be preferenced by specific species. Butterflyfishes have several types of foraging tasks and may impact in utilizing the coral reef and other social habitats used. The species composition and abundance of butterflyfishes had relations not only by coral coverage but also benthic compositions. However, factors that regulate its specific species distribution and species compositions are still under study.

scholarly journals STATUS TERUMBU KARANG DAN IKAN KARANG DI GILI MATRA, NUSA TENGGARA BARAT

2020 ◽  
Vol 14 (1) ◽  
pp. 14
Author(s):  
Eghbert Elvan Ampou ◽  
Suciadi Catur Nugroho ◽  
Nuryani Widagti
Keyword(s):  
Water Quality ◽  
Coral Reef ◽  
Coral Cover ◽  
Reef Fishes ◽  
Coral Mortality ◽  
Hard Coral ◽  
Mortality Index ◽  
Fish Group ◽  
Hard Coral Cover ◽  
Reef Condition

This study aims to identify the status of reef fishes and coral reefs in Gili Meno, Air, and Trawangan or Gili Matra waters. This area is part of the North Lombok Regency, West Nusa Tenggara Province. Field observation was conducted on September 2011 at 11 (eleven) diving points. The video-transect method was used for observing the coral reef condition, while reef fishes abundance was observed by using visual-census method. The parameter that used to determine the condition of coral reef in study location are the percentage of live hard coral cover and index of coral mortality. In general, the result shows that percentage of live hard coral cover in each diving point ranged from 4.4% - 37.2% and the Coral Mortality Index (IMK) ranged form 0.40-0.92. The values describe that the condition of coral reef at eleven diving points vary from fair until poor condition. Current status of coral reef condition showed an insignificant increase from bad to moderate during the period 2011 -2018. There were 23 families of reef fishes from 46 genera were found during the study consisting of 16 genera of target fish groups, 5 genera of indicator fish group, and 25 genera of major fish group. The water quality is still within the limits of environmental quality standards.   Keywords: Reef fish, coral reef, Mortality Index, water quality, Gili Matra

scholarly journals Macrobenthic Composition of Sea Water Associated with Seagrass in East and West Portions of the Igang Bay, Nueva Valencia, Guimaras

2012 ◽  
Vol 7 (1) ◽  
Author(s):  
Mary Jean L. De La Cruz ◽  
June Raymund Peter Flores ◽  
Melchor M. Magramo ◽  
Christy Madas ◽  
Marlon Terunez
Keyword(s):  
Water Depth ◽  
Hermit Crab ◽  
Soft Coral ◽  
Sea Water ◽  
Hard Coral ◽  
Seagrass Community ◽  
East And West

The macrobenthic invertebrates are associated with seagrass communities in East and West at the Igang Bay, Nueva Valencia, Guimaras. Seven groups were found in West Igang which includes the hard coral, gastropod, bivalve, soft coral, starfish, limpet, hermit crab and cowrie while eight groups composed of bivalve, gastropod, snail, cowrie, hard coral, hermit crab and sponge were found in the seagrass community of East Igang. Results show that gastropod was the dominating group in both sites. The hard coral group was the most frequent to occur in West Igang while the gastropod in East Igang was frequently observed. Common groups in both sites were hard coral, gastropod, bivalve, and cowrie. West Igang had higher diversity of macrobenthos (H’ = 0.608) than the East Igang with (H’ = 0.513). Both sites have sandy, silty-muddy type of substrates although some portions of West Igang were rocky. Salinity ranged from 28 to 30 parts per thousand and temperature from 20.67 to 32.67 degrees Celsius. Water depth recorded ranged from 0.43 to 0.60 meters. The higher variability of substrates in West Igang probably promoted the higher diversity of macrobenthic groups in the area suitable for different attachments and mobility along with denser growth of seagrass in the said site. Keywords - Seagrass, Igang Bay, Macrobenthic invertebrates, hard corals, gastropod, bivalve

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