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首页> 外文期刊>Estuarine coastal and shelf science >Population structure change in a temperate reef coral after a quarter of century
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Population structure change in a temperate reef coral after a quarter of century

机译：Population structure change in a temperate reef coral after a quarter of century

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Seawater warming is affecting corals worldwide. Mass mortality events are increasingly frequent, and the bio-construction potential of coral reefs is jeopardized. Revisiting sites surveyed in the past may represent a valuable tool to better understand the health state and ongoing trend of coral reefs. In the Mediterranean Sea the only reef-building coral is the endemic species Cladocora caespitosa. Several mortality events of this coral, due to thermal anomalies, have been reported in the last decades. An impressive change occurred in a population of C. caespitosa revisited 25 years after: smaller colonies became the prevalent size class and larger colonies disappeared, highlighting a loss in the bioconstruction potential. Data collected on C. caespitosa colonies in the Eastern Lig-urian Sea (NW Mediterranean) revealed that mortality rate was correlated with colony size, while reproductive potential apparently increased, suggesting hormesis (i.e., enhanced reproductive output under pre-lethal conditions).

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