Wyniki wyszukiwania

1

On the cccurence of uranium and thorium in the biosphere of natural waters. Part II. Uranium and thorium in corals, molluscs and fish

100%

Szefer P., Ostrowski S.

Oceanologia

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1981

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tom 13

2

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Seasonal changes of sedimentation rates and sediment characteristics status in the Gulf of Mannar Coral Island, India

100%

Yogesh Kumar J. S., Geetha S., Sornaraj R.

International Letters of Natural Sciences

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2014

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tom 01

Corals are known to flourish in various turbid environments around the world. The quantitative distinction between clear and turbid water in coral habitats is not well defined nor are the amount of sediment in suspension and rates of sedimentation used to evaluate the condition of reef environments well established. This study of sedimentation rate, sediment composition and pH, OC deposition was on a fringing reef flat off Thoothukudi and Vembar group of islands, Gulf of Mannar, India. In the present study the sedimentation rate ranged from 1.97 mg/cm2/day to 12.31 mg/cm2/day. The percentage of sand in the sediment was higher than silt and clay. The organic carbon level in all the study stations ranged from 0.03 to 2.54. The sediment pH of the six studied stations was highly acidic in nature at all the study sites in the Gulf of Mannar.

3

The oldest representative of a modern deep-sea ophiacanthid brittle-star clade from Jurassic shallow-water coral reef sediments

100%

Thuy B., Schulz H.

Acta Palaeontologica Polonica

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2013

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tom 58

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nr 3

Ophiurites crinitus is a fossil brittle−star species which passed largely unnoticed since its original description. In this paper, we redescribe the type material of O. crinitus with the aim to put it into the context of modern ophiuroid systematics, and propose the new genus name Ophiosternle to replace the invalid Ophiurites. The re−assessed species is shown to be a member of the extant deep−sea family Ophiacanthidae, articulated fossils of which are extremely rare. It presents greatest affinities with members of the Ophioplinthaca–Ophiocamax–Ophiomitra clade, of which it most probably represents the oldest known fossil species. The depositional environment of the strata, which yielded the described specimens is interpreted as shallow, storm−influenced marine setting in the immediate vicinity of coral reefs. This contrasts with the distribution pattern of extant species of the Ophioplinthaca–Ophiocamax–Ophiomitra clade, which almost exclusively occur at depths exceeding the shelf break.

4

Wave-induced set-up and flow over shoals and coral reefs. Part 1. A simplified bottom geometry case

100%

Massel S. R., Brinkman R. M.

Oceanologia

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2001

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tom 43

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nr 4

An analytical approach was used to model the wave-induced set-up and flow through simple shoal geometry when water depth is a linear function of the distance. Two different approaches were applied to parameterize the energy dissipation due to wave breaking. The resulting set-up height and flow velocity were determined and their dependence on the geometry of the shoal and offshore forcing was demonstrated. The extension of the solution to a more complicated bathymetry and verification against the experimental data will be given in the second part of the paper.

5

Nutrient status in coral reefs of the Iles Eparses (Scattered Islands): comparison to nearby reefs subject to higher anthropogenic influences (Mozambique Channel and Mascarenes, Indian Ocean)

80%

Riaux-Gobin C., Witkowski A., Saenz-Agudelo P., Neveux J., Oriol L., Vetion G.

Oceanological and Hydrobiological Studies

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2011

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tom 40

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nr 3

6

Elthusa epinepheli sp. nov. [Crustacea, Isopoda, Cymothoidae] a branchial parasite of the grouper Epinephelus howlandi [Serranidae, Epinephelinae] from off New Caledonia

80%

Trilles J. P., Justine J.-L.

Acta Parasitologica

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2010

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tom 55

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nr 2

177-187

The cymothoid isopod Elthusa epinepheli sp. nov., a branchial parasite of the blacksaddle grouper Epinephelus howlandi (Serranidae, Epinephelinae) from the coral reef of New Caledonia (Southwestern Pacific), is described and figured.Within the genus, E. epinepheli shows some similarity with E. raynaudii and E. myripristae. The ovigerous female of E. epinepheli can be distinguished from E. raynaudii by a less ovate body; cephalon deeply immersed in pereonite 1; eyes almost concealed by the amphicephalic processes; pereonites 3–7 distinctly decreasing in size (width and length); pleonites 1–5 distinctly increasing in width; and pleotelson larger. E. epinepheli can be distinguished from E. myripristae by the anterior margin of the cephalon being rounded in dorsal view and all pleonites being visible. E. epinepheli is the first species of Elthusa reported from the host genus Epinephelus.

7

Temporal variations in coral reef health at a coastal industrial site on the Gulf of Aqaba, Red Sea

80%

Al-Zibdah M. K., Damhoureyeh S. A., Badran M. I.

Oceanologia

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2007

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tom 49

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nr 4

A detailed ecological study was conducted for three years (2001–03) on a 5 km stretch of well-developed coral reef facing an industrial site in the southernmost section of the Jordanian coast of the Gulf of Aqaba, Red Sea. The degree of modification associated with the prevailing ecological factors was assessed with respect to species diversity and abundance of the major groups of the macrobenthic community: corals, bivalves, hydrozoans, echinoderms, sponges and macroalgae. Three locations of two depths each – 6 and 12 m – were selected and surveyed using the visual census point-intercept method. The actual area of the survey covered about 2250 m2. Macrobenthic communities occurring close to the industrial jetty were characterized by low diversity and the obvious dominance of soft coral (16–30% cover). In the deep transects (12 m) hard coral cover was higher than that in the shallow transects (30–55%). Correlation analyses indicated that species richness increased with increasing distance from the industrial jetty. Species richness of other macrobenthos was also higher as depth increased. The results revealed that the distribution and abundance of coral, echinoderms, hydrozoans and macroalgae were correlated with the relative importance of bottom modification within the various locations in the entire study area. However, no distinct influence of location or depth on the identities of most macrobenthic species was indicated.

Ograniczanie wyników

On the cccurence of uranium and thorium in the biosphere of natural waters. Part II. Uranium and thorium in corals, molluscs and fish

Seasonal changes of sedimentation rates and sediment characteristics status in the Gulf of Mannar Coral Island, India

The oldest representative of a modern deep-sea ophiacanthid brittle-star clade from Jurassic shallow-water coral reef sediments

Wave-induced set-up and flow over shoals and coral reefs. Part 1. A simplified bottom geometry case

Nutrient status in coral reefs of the Iles Eparses (Scattered Islands): comparison to nearby reefs subject to higher anthropogenic influences (Mozambique Channel and Mascarenes, Indian Ocean)

Elthusa epinepheli sp. nov. [Crustacea, Isopoda, Cymothoidae] a branchial parasite of the grouper Epinephelus howlandi [Serranidae, Epinephelinae] from off New Caledonia

Temporal variations in coral reef health at a coastal industrial site on the Gulf of Aqaba, Red Sea