scholarly journals Characterization and sources of colored dissolved organic matter in a coral reef ecosystem subject to ultramafic erosion pressure (New Caledonia, Southwest Pacific)

2018 ◽  
Vol 616-617 ◽  
pp. 438-452 ◽  
Author(s):  
Chloé Martias ◽  
Marc Tedetti ◽  
François Lantoine ◽  
Léocadie Jamet ◽  
Cécile Dupouy
Keyword(s):  
Organic Matter ◽  
Coral Reef ◽  
Dissolved Organic Matter ◽  
New Caledonia ◽  
Colored Dissolved Organic Matter ◽  
Coral Reef Ecosystem ◽  
Southwest Pacific ◽  
Reef Ecosystem

Terrestrial Nutrients and Dissolved Organic Matter Input to the Coral Reef Ecosystem via Submarine Springs

2021 ◽  
Author(s):  
Dini Adyasari ◽  
Hannelore Waska ◽  
Kirstin Daehnke ◽  
Till Oehler ◽  
Atas Pracoyo ◽  
...  
Keyword(s):  
Organic Matter ◽  
Coral Reef ◽  
Dissolved Organic Matter ◽  
Coral Reef Ecosystem ◽  
Submarine Springs ◽  
Reef Ecosystem ◽  
Organic Matter Input

scholarly journals Eutrophication Accelerates Carbonate Dissolution under High pCO2 Condition in Coral Reef Ecosystem

2016 ◽  
Vol 8 (3) ◽  
pp. 427-438 ◽  
Author(s):  
M. N. Islam ◽  
B. E. Casareto ◽  
Y. Suzuki
Keyword(s):  
Organic Matter ◽  
Coral Reef ◽  
Calcium Carbonate ◽  
Bacterial Abundance ◽  
T Test ◽  
Carbonate Dissolution ◽  
Dark Condition ◽  
Coral Reef Ecosystem ◽  
Dissolution Rates ◽  
Reef Ecosystem

Incubation experiments were carried out to determine the effect of eutrophication on carbonate dissolution under high pCO2 (partial pressure of carbon dioxide) condition in coral reef ecosystem at Sesoko Island, Okinawa, Japan. Short incubation (24 h under natural illumination) and long incubations (4 days under dark condition) were carried out using white coral skeleton (without attachment of living organism, control); natural rubble (with associated epilithic and endolithic communities) and natural rubble with addition of dissolve organic matter (glucose and coral mucus). Addition of DOM significantly enhanced bacterial abundance (t-test; p=0.01) and net respiration (t-test; p=0.0001) with increasing pCO2 levels (p < 0.05) under natural illumination. Consistent with increase in respiration, dissolution rates also increased from 136.22±2.04 to 652.38±4.51 µmolm-2d-1. Under dark condition, where photosynthesis was inhibited, dissolution of calcium carbonate further increased with addition of different level of DOM. In addition of DOM incubation bottles, bacterial abundance increased by 3~4 orders of magnitude and the dissolution rates increased by 2.5~10 times more than the control. The results suggest that availability of organic matter in the reefs will enhance metabolic activities (respiration) of microbial communities associated with coral rubble which ultimately increase dissolution of calcium carbonate.

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
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