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Damage to photosystem II in symbiotic dinoflagellates: a determinant of coral bleaching.
Temperature-dependent loss of PSII activity and concomitant decrease in D1 reaction center protein seen in symbionts collected from corals naturally bleached on the reef are confirmed, indicating that perturbation ofPSII protein turnover rates during photoinhibition at elevated temperatures underlies the physiological collapse of symbiont in corals susceptible to heat-induced bleaching.
Low symbiont diversity in southern Great Barrier Reef corals, relative to those of the Caribbean
The comparison of symbiont diversity between southern GBR and Caribbean reefs shows an inverse relationship between coral diversity and symbionT diversity, perhaps as a consequence of more-rapid diversification of Caribbean symbionts.
Seasonal patterns of tissue biomass and densities of symbiotic dinoflagellates in reef corals and relation to coral bleaching
The results show that corals from all depths exhibited bleaching every year, regardless of whether they appeared white, tan, or mottled to the human eye, suggesting that all tropical reef-building corals, world-wide, exhibit similar predictable cycles in their tissue biomass and symbiotic algae.
Coral bleaching: interpretation of thermal tolerance limits and thermal thresholds in tropical corals
A thorough understanding of the organismal responses occurring during bleaching will help explain changes in coral populations and in the coral reef community, and perhaps assist in predicting the future of reef corals and coral reefs during the next century of global climate change.
Multi-year, seasonal genotypic surveys of coral-algal symbioses reveal prevalent stability or post-bleaching reversion
The extent to which coral colonies show fluctuations in their associations with different endosymbiotic dinoflagellates is documents, and the exposure to greater environmental variability near the surface may explain the higher symbiont diversity found within and between host colonies.
The effects of elevated temperature on the photosynthetic efficiency of zooxanthellae in hospite from four different species of reef coral: a novel approach
Fundamental differences in the physiology of the symbionts within different species of coral are identified, with zooxanthellae within M. annularis appear to be more susceptible to heat-induced damage at or near the reaction centre of Photosystem II, while zooxanhellae living in S. radians remain capable of dissipating excess excitation energy through non-photochemical pathways, thereby protecting the photosystem from damage during heat exposure.
Diurnal changes in photochemical efficiency and xanthophyll concentrations in shallow water reef corals : evidence for photoinhibition and photoprotection
Findings suggest a photoprotective function for these pigments, which declined after dawn to reach a minimum between midday and early afternoon, recovering to former dawn levels by early evening.
Closely related Symbiodinium spp. differ in relative dominance in coral reef host communities across environmental, latitudinal and biogeographic gradients
The diversity and community structures of symbiotic dinoflagellates are described from reef invertebrates in southern and central provinces of the Great Barrier Reef, Australia, and Zamami Island, Okinawa, Japan and most host-specialized types were found to be characteristic of a particular geographic region.
Long‐standing environmental conditions, geographic isolation and host–symbiont specificity influence the relative ecological dominance and genetic diversification of coral endosymbionts in the genus
The importance of geographic proximity, host life history and regional and local differences in environment in driving the ecological and evolutionary processes underpinning the global patterns of diversity and distribution of symbiotic dinoflagellates is examined.
High diversity and host specificity observed among symbiotic dinoflagellates in reef coral communities from Hawaii
The Hawaiian Islands represent one of the most geographically remote locations in the Indo-Pacific, and are a refuge for rare, endemic life. The diversity of symbiotic dinoflagellates (Symbiodinium