The effect of multiple stressors on the Florida Keys coral reef ecosystem: a landscape hypothesis and a physiological test

Article Abstract:

The effect of multiple stressors on the Florida Keys coral reef ecosystem has been studied with a physiological test, and a landscape hypothesis has been developed. Changes in land use and water management in south Florida have changed both quality and quantity of fresh water going into Florida Bay and extensive hypersalinity has developed with drastic results for benthic communities and perhaps on coral communities there and in the Florida Keys National Marine Sanctuary. Effects of two stressors, higher temperature and salinity on coral respiration, production and survival were tested for. Higher temperatures bring significant lowering of respiration, photosynthesis and net P:R ratios after 6 hours. Higher salinities bring similar results after 30 hours. Where both are in effect a very significant but short-term interactive amelioration exists.

Florida, Salinity, Coral reefs and islands, Coral reefs, Ocean temperature

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Molecular weight distribution of proteinaceous material in Long Island Sound sediments

Article Abstract:

Molecular weight distribution of proteinaceous material in Long Island Sound sediments is discussed. The material was extracted with NaOH and results evaluated in terms of diagenetic changes in the pool. The relative abundance of the peptide-size fraction was essentially unchanged. Selective adsorption, bacterial production, geopolymerization and selective preservation were investigated in the search for explanations of changes. Protein concentration was measured as total hydrolyzed amino acids (THAA) in surface and downcore sediments over a year with attention to sediment depth and season. Most sampes were collected in the time of the spring phytoplankton bloom.

Statistical Data Included, Analysis, Measurement, Estuarine sediments, Molecular weights, Long Island Sound

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