Download Coral Health and Disease by Yossi Loya (auth.), Professor Eugene Rosenberg, Professor PDF

By Yossi Loya (auth.), Professor Eugene Rosenberg, Professor Yossi Loya (eds.)

Coral reefs represent the main incredible and various ecosystems within the marine atmosphere. They shape reservoirs of the top organic range, together with genetic assets and bio-active compounds. regrettably, coral reefs also are one of the such a lot seriously degraded marine ecosystems. during the last 20 years, coral reef groups were experiencing more and more tense stipulations because of a mixture of ordinary and anthropogenic unsafe elements. Coral illnesses are one of the most up-to-date in a chain of threats (e.g. coral bleaching, over exploitation of fish shares, harmful fishing practices and coastal advancements) that's hard the resilience of coral reef groups.

During a world assembly on coral illnesses held in Eilat, Israel, in 2003, top scientists offered reports and up to date result of laboratory learn and in situ observations so one can check the prestige of coral overall healthiness and to appreciate the illness mechanisms.

The so much appropriate papers are actually provided in Coral well-being and Disease. The publication begins with numerous case reviews of reefs, which strongly range locally, e.g. the pink Sea, Caribbean, Mediterranean, Gulf of Mexico, Japan, western Indian Ocean and the nice Barrier Reef. the second one half on microbial ecology and body structure includes contributions describing the symbiotic family members of corals and microbes, the microbial position in food and bleaching resistance and the antibacterial actions of corals. specific coral illnesses, reminiscent of aspergillosis, white pox, black, yellow and white band illnesses are handled within the 3rd half. eventually, diversified hypotheses of the mechanisms of coral bleaching, together with a projection of the way forward for coral reefs, are mentioned.

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Sample text

Our field and laboratory studies on the effects of oil pollution on corals may explain the lack of recruitment of corals in the chronically polluted ECNR until 1979-1980. However, although no major oil spills have occurred in Eilat since 1980, to date the reef flats at the ECNR have not returned to their former community structure (Fig. 4). In the last two decades, other man-made perturbations (mainly eutrophication) have increased in severity (Sect. 4), preventing rehabilitation of the coral reefs of Eilat.

2000) and anthropogenic activities (Brown and Howard 1985; Nystrom et al. 2000). The period of time required for recruitment and recovery of reefs after such disturbances varies from very short (2 years; Shinn 1972) to prolonged (50 years or more; Grigg and Maragos 1974; Pearson 1981) and largely depends on local settings. The role of disturbance on community structure and species diversity of natural communities has been documented and discussed by many investigators. (For selected bibliography and reviews, see Dayton 1971; Connell 1978; Paine and Levin 1981; Miller 1982; Porter et al.

We have examined the reproductive patterns of 13 ecologically important coral species at Eilat (Fig. 5; Shlesinger and Loya 1985). Although these species comprise only 13% of the total known species there, they are among the most abundant, contributing approximately 60-70% of the total living cover of coral communities on the reef flats (Loya 1972). The major reproductive activities of these species (planula shedding or gamete spawning) occur in different seasons, different months, or different lunar phases within the same month (Fig.

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