نتایج جستجو برای: corals
تعداد نتایج: 5041 فیلتر نتایج به سال:
carboniferous strata in the alborz mountains consist of calcareous rich fossils the main part of which is composed of rugose corals. there have been few studies carried out on corals so far. in this paper, a new subfamily, genus and eight new species of rugose corals from mobarak limestones in the central alborz mountains are introduced
The percentage cover and distribution of scleractinian corals were studied at two Iranian islands in the Persian Gulf. Survey techniques involved the use of 20-m line transects placed at 4-9 m depth interval, parallel to the shore. GIS based maps were employed to show the distribution of hard corals. In Farurgan Island, hard coral cover was concentrated in the west and north-west of the island,...
Background and Objectives: ?????? Methods: ?????? Findings: ?????? Conclusion: ????? Coral ecosystems, like other natural habitats, are under effect by global warming. Every year we see the bleaching of corals in different parts of the world. Since the physical parameters of seawater are affected by meteorological phenomena, so in this study using ten-year data of oceanographic buoys, the ...
Carboniferous strata in the Alborz mountains consist of calcareous rich fossils the main part of which is composed of rugose corals. There have been few studies carried out on corals so far. In this paper, a new subfamily, genus and eight new species of rugose corals from Mobarak limestones in the central Alborz mountains are introduced
carboniferous corals of sardar formation, in zeludu stratigraphic section (in ozbak kuh mountains) was studied. after selected of 50 specimens of coral fossils, from first band of corals, 9 species belong to 5 genera from rugosa and tabulata corals with late serpukhovian age were identified. these corals are included following species: heritschioides pseudosolitarius, heritschioides vepres, her...
Density, mitotic index, Chlorophyll-a content and cell size of symbiotic dinoflagellates of dominant reef-building corals were measured at two different depths in Kish Island and from one depth of Larak Island in the Persian Gulf. The higher densities of symbionts were found in shallow waters of Kish Island. However, ANOVA analyses of the mitotic index yielded mixed results. The cell sizes of s...
Density, mitotic index, Chlorophyll-a content and cell size of symbiotic dinoflagellates of dominant reef-building corals were measured at two different depths in Kish Island and from one depth of Larak Island in the Persian Gulf. The higher densities of symbionts were found in shallow waters of Kish Island. However, ANOVA analyses of the mitotic index yielded mixed results. The cell sizes of s...
Assuming the possible scenario ICCP RCP8.5, by 2100, the pH of seawater in Hengam coral reef in the Persian Gulf will decrease by 0.46 compared to 1880 (to less than 7.72). Total dissolved inorganic carbon will increase from 2006 to 2263 µmol/kg. The concentration of bicarbonate ions will increase by 24% and the carbonate ions will decrease by 51%. The saturation of calcium carbonate in seawate...
Ocean warming threatens corals and the coral reef ecosystem. Nevertheless, corals can be adapted to their thermal environment and inherit heat tolerance across generations. In addition, the diverse microbes that associate with corals have the capacity for more rapid change, potentially aiding the adaptation of long-lived corals. Here, we show that the microbiome of reef corals is different acro...
Scleractinian corals (phylum Cnidaria, class Anthozoa) have innate immunological responses against infections. Research has recently suggested that corals also possess an adaptive-like immunological repertoire that recognizes specific pathogens and allografts. While evolutionarily distinct, the corals' innate and adaptive-like immunity systems are not mutually exclusive because the phagocytic c...
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