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Full-Text Articles in Life Sciences
The Magnitude And Persistence Of Soil No, N2o, Ch4, And Co, Fluxes From Burned Tropical Savanna In Brazil, M Poth, Iris C. Anderson, Et Al
The Magnitude And Persistence Of Soil No, N2o, Ch4, And Co, Fluxes From Burned Tropical Savanna In Brazil, M Poth, Iris C. Anderson, Et Al
VIMS Articles
Among all global ecosystems, tropical savannas are the most severely and extensively affected by anthropogenic burning. Frequency of fire in cerrado,a type of tropical savanna covering 25% of Brazil, is 2 to 4 years. In 1992 we measured soil fluxes of NO, N2O, CH4, and CO2 from cerrado sites that had been burned within the previous 2 days, 30 days, 1 year, and from a control site last burned in 1976. NO and N2O fluxes responded dramatically to fire with the highest fluxes observed from newly burned soils after addition of water. Emissions of N-trace gases after burning were of …
The Use Of Night-Vision Equipment To Observe Wildlife In Forested Wetlands, Kirk J. Havens, Walter I. Priest Iii, Ann Jennings
The Use Of Night-Vision Equipment To Observe Wildlife In Forested Wetlands, Kirk J. Havens, Walter I. Priest Iii, Ann Jennings
VIMS Articles
Urban forested wetlands and rural forested wetlands were studied to investigate the effectiveness of night-vision image intensifier equipment in the observation of medium-to-large animals and to investigate if surrounding landscape type influences wetland habitat value. Bats, cats, dogs, owls, deer, and humans were easily observed using the night-vision equipment. Differences in species use between the rural and urban forested wetland were observed. Light levels and noise levels were significantly higher (p
Introduction To The Proceedings Of The Blue Crab Recruitment Symposium, Ej Olmi, Rj Orth
Introduction To The Proceedings Of The Blue Crab Recruitment Symposium, Ej Olmi, Rj Orth
VIMS Articles
The blue crab, Callinectes sapidus Rathbun, is found in all major coastal habitats along the mid-Atlantic, South Atlantic and Gulf of Mexico coasts of the United States, including large embayments, barrier island-lagoonal systems, and coastal marsh, mangrove and seagrass systems. Ecologically important, blue crabs may control abundances of other estuarine benthic species (Hines et aI., 1990). The blue crab also supports valuable commercial and recreational fisheries from New Jersey to Texas; commercial landings of 249.3 million pounds of hard blue crabs in 1993 had a dockside value of 126.6 million dollars (NMFS, 1994). Blue crab stocks vary interannually within and …
Review Of Ecology And Fishery Of The Olympia Oyster, Ostrea Lurida With Annotated Bibliography, P Baker
Review Of Ecology And Fishery Of The Olympia Oyster, Ostrea Lurida With Annotated Bibliography, P Baker
VIMS Articles
The Olympia oyster, Ostrea lurida,is a small bivalve mollusk species native to the western United States and Canada. It was commercially important in the late 19th century, and was cultured in Washington State until a near-collapse of the industry in the 1950s. Since then it has made a minor commercial comeback, but has been largely superseded by the introduced Crassostrea gigas. Most significant literature dates from prior to the collapse of the industry in the 1950s, and much of this is comprised of state or federal agency reports, or similar obscure literature formats. This document is divided into 2 parts; …
Nitrification Potentials Of Benthic Macrofaunal Tubes And Burrow Walls: Effects Of Sediment Nh4+ And Animal Irrigation Behavior, Ms Mayer, L Schaffner, Wm Kemp
Nitrification Potentials Of Benthic Macrofaunal Tubes And Burrow Walls: Effects Of Sediment Nh4+ And Animal Irrigation Behavior, Ms Mayer, L Schaffner, Wm Kemp
VIMS Articles
We examined the natural variation of nitrification potentials (NPs) of surface sediments and macrofaunal tubes and burrow walls in relation to sediment NH4+ level, season, and macrofaunal species. NP (the ability of a unit of sediment to oxidize NH4+ when NH4+ and O-2 are not limiting) is an index of the abundance and activity of nitrifying bacteria which we measured in slurries with the chlorate block technique (nmol NO2--N produced g(-1) dry weight sediment h(-1)). The NP of the tubes of the polychaete Loimia medusa was positively related to sediment NH4+ (KCl-extractable) concentration at 3 sites where tubes were collected …