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A connection between colony biomass and death in Caribbean reef-building corals.

التفاصيل البيبلوغرافية
العنوان: A connection between colony biomass and death in Caribbean reef-building corals.
المؤلفون: Daniel J Thornhill, Randi D Rotjan, Brian D Todd, Geoff C Chilcoat, Roberto Iglesias-Prieto, Dustin W Kemp, Todd C LaJeunesse, Jennifer McCabe Reynolds, Gregory W Schmidt, Thomas Shannon, Mark E Warner, William K Fitt
المصدر: PLoS ONE, Vol 6, Iss 12, p e29535 (2011)
بيانات النشر: Public Library of Science (PLoS), 2011.
سنة النشر: 2011
المجموعة: LCC:Medicine
LCC:Science
مصطلحات موضوعية: Medicine, Science
الوصف: Increased sea-surface temperatures linked to warming climate threaten coral reef ecosystems globally. To better understand how corals and their endosymbiotic dinoflagellates (Symbiodinium spp.) respond to environmental change, tissue biomass and Symbiodinium density of seven coral species were measured on various reefs approximately every four months for up to thirteen years in the Upper Florida Keys, United States (1994-2007), eleven years in the Exuma Cays, Bahamas (1995-2006), and four years in Puerto Morelos, Mexico (2003-2007). For six out of seven coral species, tissue biomass correlated with Symbiodinium density. Within a particular coral species, tissue biomasses and Symbiodinium densities varied regionally according to the following trends: Mexico≥Florida Keys≥Bahamas. Average tissue biomasses and symbiont cell densities were generally higher in shallow habitats (1-4 m) compared to deeper-dwelling conspecifics (12-15 m). Most colonies that were sampled displayed seasonal fluctuations in biomass and endosymbiont density related to annual temperature variations. During the bleaching episodes of 1998 and 2005, five out of seven species that were exposed to unusually high temperatures exhibited significant decreases in symbiotic algae that, in certain cases, preceded further decreases in tissue biomass. Following bleaching, Montastraea spp. colonies with low relative biomass levels died, whereas colonies with higher biomass levels survived. Bleaching- or disease-associated mortality was also observed in Acropora cervicornis colonies; compared to A. palmata, all A. cervicornis colonies experienced low biomass values. Such patterns suggest that Montastraea spp. and possibly other coral species with relatively low biomass experience increased susceptibility to death following bleaching or other stressors than do conspecifics with higher tissue biomass levels.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 1932-6203
Relation: http://europepmc.org/articles/PMC3245285?pdf=render; https://doaj.org/toc/1932-6203
DOI: 10.1371/journal.pone.0029535
URL الوصول: https://doaj.org/article/b36f187bd39d4ac0aad0fb4f8afab4a6
رقم الأكسشن: edsdoj.b36f187bd39d4ac0aad0fb4f8afab4a6
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:19326203
DOI:10.1371/journal.pone.0029535