Zooxanthellae expelled from bleached corals at 33°C are photosynthetically competent
نویسندگان
چکیده
منابع مشابه
Zooxanthellae ultrastructure affected in bleached corals
Most reef-building corals are hermatypic: they harbour endosymbiotic algae of the dinoflagellates group (generally called zooxanthellae, genus Symbiodinium), within vacuoles in the gastroderm cells. Bleaching, loss of colour due to loss of these symbiotic algae and/or their photosynthetic pigments, on a large scale, appears to increase by intensity and geographic extent, certainly related to in...
متن کاملZooxanthellae harvested by ciliates associated with brown band syndrome of corals remain photosynthetically competent.
Brown band syndrome is a new coral affliction characterized by a local accumulation of yet-unidentified ciliates migrating as a band along the branches of coral colonies. In the current study, morphologically intact zooxanthellae (= Symbiodinium) were observed in great numbers inside the ciliates (>50 dinoflagellates per ciliate). Microscale oxygen measurements and variable chlorophyll a fluore...
متن کاملModerate Thermal Stress Causes Active and Immediate Expulsion of Photosynthetically Damaged Zooxanthellae (Symbiodinium) from Corals
The foundation of coral reef biology is the symbiosis between corals and zooxanthellae (dinoflagellate genus Symbiodinium). Recently, coral bleaching, which often results in mass mortality of corals and the collapse of coral reef ecosystems, has become an important issue around the world as coral reefs decrease in number year after year. To understand the mechanisms underlying coral bleaching, ...
متن کاملTemperature Induced Changes in Thylakoid Membrane Thermostability of Cultured, Freshly Isolated, and Expelled Zooxanthellae from Scleractinian Corals
Coral bleaching events are characterized by a dysfunction between the cnidarian coral host and the symbiotic dinoflagellate algae, known as zooxanthellae (genus Symbiodinium). Elevated temperature and intense light induce coral bleaching, where zooxanthellae are expelled from the host tissue. The primary cellular process in zooxanthellae which leads to coral bleaching is unresolved, and here, w...
متن کاملHurricanes benefit bleached corals.
Recent, global mass-mortalities of reef corals due to record warm sea temperatures have led researchers to consider global warming as one of the most significant threats to the persistence of coral reef ecosystems. The passage of a hurricane can alleviate thermal stress on coral reefs, highlighting the potential for hurricane-associated cooling to mitigate climate change impacts. We provide evi...
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ژورنال
عنوان ژورنال: Marine Ecology Progress Series
سال: 2001
ISSN: 0171-8630,1616-1599
DOI: 10.3354/meps220163