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Full-Text Articles in Physical Sciences and Mathematics
Decade-Scale Trend In Sea Water Salinity Revealed Through Δ18o Analysis Of Montastraea Annularis Annual Growth Bands, Robert B. Halley, Peter Koenraad Swart, Richard E. Dodge, Harold J. Hudson
Decade-Scale Trend In Sea Water Salinity Revealed Through Δ18o Analysis Of Montastraea Annularis Annual Growth Bands, Robert B. Halley, Peter Koenraad Swart, Richard E. Dodge, Harold J. Hudson
Marine & Environmental Sciences Faculty Articles
Stable oxygen isotope ratios (δ18O) of coral skeletons are influenced by ambient water temperature and by the oxygen isotope ratio in the surrounding sea water, which, in turn, is linked to evaporation (salinity) and precipitation. To investigate this relationship more thoroughly, we collected hourly temperature data from the Hen and Chickens Reef in the Florida Keys between 1975 and 1988 and compared them to the δ18O of Montastraea annularis skeleton that grew during the same interval. To ensure that we obtained the correct oxygen isotopic range in the skeleton we typically sampled the coral at a …
Influence Of Reduced Leaching On Growth Of Seedlings Of Black Locust Inoculated With Rhizobia, William R. Graves, Sandra R. Anfinson
Influence Of Reduced Leaching On Growth Of Seedlings Of Black Locust Inoculated With Rhizobia, William R. Graves, Sandra R. Anfinson
Journal of the Iowa Academy of Science: JIAS
Seedlings of black locust (Robinia pseudoacacia L.) were inoculated with compatible rhizobia and irrigated twice each week with solution containing either 50 or 150 mg nitrogen/L. Leaching fraction treatments of 0, 0.2, or 0.4 were maintained for 6 weeks. Seedlings supplied 50 mg nitrogen/L grew poorly compared co planes supplied 150 mg nitrogen/L regardless of leaching fraction. Dry masses of shoots and of entire planes were lower for seedlings in the 0 and 0.2 leaching fraction treatments compared with chose in the 0.4 treatment. Neither leaching fraction nor applied nitrogen concentration appeared co affect the number of nodules per plant, …