Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 9 of 9 for “"montastraea"”.
-
Effects of nitrogen-fixing symbiotic cyanobacteria on the microbial ecology of the coral, Montastraea cavernosa
… abundant and broadly distributed Caribbean coral Montastraea cavernosa forms a symbiosis with intracellular nitrogen-fixing cyanobacteria in some, but not all colonies, which make up approximately 30% of the population and display a characteristic orange fluorescence. Diverse and functionally …
-
Variação morfológica dos esqueletos de Montastraea cavernosa (Linnaeus, 1767) e Favia gravida Vernill, 1868 (Cnidaria, Scleractinia)
… of many colonial animals. Skeletal variations of Montastraea cavernosa from Brazil, Abrolhos (BA), Tamandaré (PE) and Mexico, Puerto Morelos (Q.ROO) and variations of Favia gravida from Brazil, Abrolhos, Tamandaré and Santa Cruz (ES) were analyzed. At the Abrolhos reefs, samples of M. cavernosa …
-
Variação de formas de crescimento de Montastraea cavernosa (Linnaeus, 1767) (Cnidaria, Anthozoa, Scleractinia): uma abordagem modular
… access variations in growth forms of the coral Montastraea cavernosa using the arrangement and the size of polyps in the inner face of the colonial of 46 samples collected in Parcel das Paredes (BA) and João Pessoa (PB). Results showed that area of the polyps is partially explained by factors …
-
Comparative Growth Rates of the Extinct Coral Montastraea nancyi: A Dominant Framework Builder in the Pleistocene (MIS 5e) Reefs of Curacao, Netherland Antilles
The extinct organ-pipe coral Montastraea nancyi Pandolfi was a major framework building coral in reefs of the Pleistocene interglacial highstand (MIS 5e, ~125 kya) in Curaçao as well as many other islands in the Caribbean. In Curaçao well-preserved columns of this species were sampled from two …
-
Coral skeleton density banding: biotic response to changes in sea surface temperature
… cm in diameter) extracted from four species of Montastraea growing on the fringing reef tract of Curaçao, Netherlands Antilles. Annual mean variation in SST on Curaçao range from 29o in mid-September to 26o C in late February. Samples were collected at strategic time periods spanning the 3o C …
-
Fluorescence in reef corals
… an in situ corrununity study of the species Montastraea cavernosa and investigate the variability of fluorescence emission among colonies of one species at one location. Coral's fluorescence emission spectrum can result from the excitation of one or more fluorescing pigments. A mathematical …
-
Ecosystem health in Guánica Bay and La Parguera, Puerto Rico: Remote sensing of ocean color and metal analysis of coral tissue and surficial sediments
… was found in coral tissue. In the coral <em>Montastraea cavernosa, </em>Cu concentration of 103 ppm is over 69 ppm threshold that affects coral fertilization. Though coral Zn levels found in this study were higher than those reported by Whitall et al. (Whitall et al.), the concentrations are …
-
Sequence Stratigraphy and Depositional Controls on Oligocene-Miocene Caribbean Carbonate-Dominated Systems, Puerto Rico and the Dominican Republic
… and turbid-water tolerant photozoan corals (Montastraea, Goniopora, Porites, and Agaricia). This facies composition is atypical of tropical shallow-water environments and indicates stressed conditions. Timing of Ponce Limestone sequence deposition correlates with a known regional upwelling …
-
Chromatophore tissue density and skeletal density banding as a measure of the adaptive response of healthy corals to environmental change
Chromatophores, pigment-bearing cells within the ectodermal layer of hermatypic scleractinian coral tissues, are postulated to enhance the photosynthetic activity of zooxanthellae symbionts and possibly protect the coral animal from harmful ultraviolet (UV) radiation. Yet connections have not …