scholarly journals Effectivity of Normal Concrete and Clamshell as Materials of Artificial Pyramid Reef at Pasir Putih Beach, Situbondo - Indonesia

Jurnal Segara ◽  
2021 ◽  
Vol 17 (1) ◽  
pp. 1
Author(s):  
Rudhy Akhwady ◽  
Muhammad Akhyar Maududi ◽  
Dwi Chandra Dewi ◽  
Oktiyas Muzaky Luthfi
Keyword(s):  
Coral Reef ◽  
Artificial Reef ◽  
Field Research ◽  
Coral Reef Ecosystem ◽  
Normal Concrete ◽  
Underwater Camera ◽  
Descriptive Method ◽  
Important Purpose ◽  
Reef Ecosystem ◽  
Better Than

The bivalve anadara grandis is one of the most abundant shells which are easy to find in Indonesian waters. The number of clams consumed is directly proportional to the amount of clamshell waste, which the most part is only disposed into waste. Coral reef has a very important purpose in supporting activities in coastal areas. Artificial reef is a structure that has aim to restore the biological purpose coral reef that have been damaged. This study aims to compare the effectiveness of the use of normal concrete (made from sand, cement dan splits only) than clamshell mixture as materials of artificial reef.  A field research was conducted in Pasir Putih, Situbondo, with visual descriptive method (transect with a quadrant of 25 x 25cm) and underwater camera as an aid to facilitate the observation. During the 4-month observation of the drowning, nine types of biotas were found in attaching, with the dominant biota attached to these artificial reef were bivalves, barnacles, and bryozoan. Results show that the total number and density of calcareous biota attached on clamshell concretes are higher than those of standard concretes. So, it could be concluded that the concrete reefs made of clamshells resulted in attachment of biota slightly higher than it of normal concretes and the benefits of both materials can form the coral reef ecosystem well. In particular, the use of artificial reef with a mixture of clamshells is better than normal concrete because its more effective for algae attachment and cheaper because  low budget due to the material availability of clamshell presently as damage and wastes in coastal area.

scholarly journals Physical Characteristics of Artificial Reef Post Deployed on 2017 in Trenggalek Damas Beach

2021 ◽  
Vol 10 (1) ◽  
pp. 58
Author(s):  
Anda Putra R. Sirait ◽  
Oktiyas Muzaky Muzaky Luthfi ◽  
Andik Isdianto
Keyword(s):  
Coral Reef ◽  
Good Condition ◽  
Artificial Reef ◽  
Environmentally Friendly ◽  
Physical Characteristics ◽  
Artificial Reefs ◽  
Fishing Gear ◽  
Coral Reef Ecosystem ◽  
Entire Structure ◽  
Reef Ecosystem

Damage to the coral reef ecosystem in the Damas Coast waters is caused by the behavior of using fishing gear that is not environmentally friendly. Based on the problem, there is a solution to lay 25 cube-shaped artificial reefs in 2017. The condition of artificial reefs that have been placed in the waters of Damas Beach within 2.5 years needs to be monitored to determine the physical characteristics of artificial reefs. Observation of physical characteristics is done visually by using the underwater photo transect method. The observation found 22 artificial reefs (AR) including physical characteristics; 15 AR is Buried by sediment; 1 AR covered by a net; 3 AR in a Tilted position and 4 AR in good condition. Three AR that was not found is considered to have disappeared or the entire structure has been buried by sediment.

THE COMPOSITION AND DISTRIBUTION OF BENTHIC FORAMINIFERA AT CORAL REEF ECOSYSTEM IN THOUSANDS ISLAND

2013 ◽  
Vol 5 (1) ◽  
Author(s):  
Lumban Nauli Lumban Toruan ◽  
Dedi Soedharma ◽  
Kresna Tri Dewi
Keyword(s):  
Coral Reef ◽  
Human Activities ◽  
Close Association ◽  
Mesh Size ◽  
Coral Reef Ecosystem ◽  
Composition Distribution ◽  
Benthic Foraminifers ◽  
High Nutrient ◽  
Binocular Microscope ◽  
Reef Ecosystem

Composition and distribution of foraminifers are affected by human activities and have close association with coral reef ecosystem. The aims of this research were to investigate the benthic foraminifers’ composition and distribution in sediment of coral reef ecosystem. Eleven stations of Karang Bongkok, Pramuka, and Onrust Island were observed in this study. The sediments were taken from surface substrate up to 2 cm under the substrate. Samples were washed on sieve with mesh size 0,063 mm, and then dried in oven with 50°C of temperature  for two hours. After separating from the sediment, the foraminifers were laid on foraminiferal slide and indentified using binocular microscope. The highest composition of symbiont-bearing foraminiferal assemblages which associated with reef ecosystem was in East Pramuka (78.17%) and the lowest was in South Onrust (21,83%). The opportunistic type had the highest composition in South Onrust (38.67%) and the lowest was in South Karang Bongkok. In west Pramuka had the highest composition of heterotrophic type (57.17%) and the lowest was in North Onrust (11.33%). Onrust Island was dominated by opportunistic type, indicating high nutrient. The highest amount of foraminifers’ taxa was found in Karang Bongkok with good coral reef coverage, while the lowest in Onrust facing with Jakarta Bay. Keywords: composition, distribution, benthic foraminifers, coral reef.

Measurement of the trophic level of fish in a coral reef ecosystem using stable isotopes

2013 ◽  
Vol 19 (1) ◽  
pp. 105-115 ◽  
Author(s):  
Guohuan YANG ◽  
Xingli SUN ◽  
Xiuqiong HOU ◽  
Chunliang CHEN
Keyword(s):  
Stable Isotopes ◽  
Coral Reef ◽  
Trophic Level ◽  
Coral Reef Ecosystem ◽  
Reef Ecosystem

Marine reserves, fisheries ban, and 20 years of positive change in a coral reef ecosystem

2021 ◽  
Author(s):  
Peter J. Mumby ◽  
Robert S. Steneck ◽  
George Roff ◽  
Valerie J. Paul
Keyword(s):  
Coral Reef ◽  
Marine Reserves ◽  
Positive Change ◽  
Coral Reef Ecosystem ◽  
Reef Ecosystem

Integrity evaluation and dynamic simulation of Xisha coral reef ecosystem

2021 ◽  
Vol 41 (10) ◽  
Author(s):  
王耕，董瑞，周腾禹，徐惠民，丁德文 WANG Geng
Keyword(s):  
Coral Reef ◽  
Dynamic Simulation ◽  
Coral Reef Ecosystem ◽  
Reef Ecosystem

scholarly journals CONDITION OF CORAL AND REEF FISH IN THE LOCATION OF FISH CATCHING USING DYNAMITE FISHING IN KAPOPOSANG WATER PARK AND THE SURROUNDING SEA

2020 ◽  
Vol 6 (1) ◽  
pp. 1
Author(s):  
Mahmudin Mahmudin ◽  
Chair Rani ◽  
Hamzah Hamzah
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Coral Cover ◽  
Low Cost ◽  
Fish Abundance ◽  
Live Coral ◽  
Coral Reef Ecosystem ◽  
Control Location ◽  
Target Fish ◽  
Reef Ecosystem

Dynamite fishing is one of the causes of damage to the coral reef ecosystem in Indonesia. Fishing activities using explosives (dynamite fishing) occur because of the desire of fishermen to get a lot of catch with low cost in a short time. Kapoposang Water Park (WP) is a region rich in marine biological resources. However, dynamite fishing activities which are still found within the area have caused the coral reef ecosystem to be severely damaged. The results showed a lower difference in the percentage of live coral cover at dynamite fishing locations (DF1, DF2) compared to control locations (K1, K2). In addition, the highest average values of coral fish abundance were found at locations K1, DF1, and DF2. Conversely, the results of the analysis found the lowest fish abundance at the K2 location. Different from the average number of reef fish species that were higher at the control location (K1, K2) compared to dynamite fishing locations (DF1, DF2). For the target fish biomass there is no real difference between the control location and dynamite fishing.

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