Sedimentation and bioturbation in a salt marsh as revealed by 210 Pb, 137 Cs, and 7 Be studies12
نویسندگان
چکیده
منابع مشابه
Sedimentation dynamics in the East China Sea elucidated from 210 Pb , 137 Cs and 239 , 240 Pu
Sedimentation dynamics in the East China Sea was investigated based on profiles and inventories of Pb , Cs and ex Pu in sediment cores collected from various settings in this marginal sea. The derived sedimentation rates vary by two orders of magnitude, from ;2 to 0.02 cm yr, and generally decrease southward along the inner shelf and eastward offshore. This pattern is consistent with the disper...
متن کاملSediment chronology in San Francisco Bay , California , defined by 210 Pb , 234 Th , 137 Cs , and 239 , 240 Pu
Sediment chronologies based on radioisotope depth profiles were developed at two sites in the San Francisco Bay estuary to provide a framework for interpreting historical trends in organic compound and metal contaminant inputs. At Richardson Bay near the estuary mouth, sediments are highly mixed by biological andror physical processes. Excess Th penetration ranged from 2 to more than 10 cm at e...
متن کاملa fundamental study of "histiriographic metafiction", and "literary genres", as introduced in "new historical philosophy", and tracing them in the works of julian barnes.
abstract a fundamental study of “historio-graphic metafiction” and “literary genres”, as introduced in “new historical philosophy”, and tracing them in the works of julian barnes having studied the two novels, the porcupine and arthur & george, by julian barnes, the researcher has applied linda hutcheon’s historio-graphic metafictional theories to them. the thesis is divided into five cha...
15 صفحه اولSeasonal and topographic variations in porewaters of a southeastern USA salt marsh as revealed by voltammetric profiling†
We report electrochemical profiles from unvegetated surficial sediments of a Georgia salt marsh. In creek bank sediments, the absence of Sigma H2S or FeSaq and the presence of Fe(III)-organic complexes suggest that Mn and Fe reduction dominates over at least the top ca. 5 cm of the sediment column, consistent with other recent results. In unvegetated flats, accumulation of Sigma H2S indicates t...
متن کاملBioaccumulation of 210 Po and 210 Pb in Arctic seabirds
INTRODUCTION When considering the potential radiological impacts of anthropogenic radionuclides in the environment, it is important to understand the doses incurred by biota by natural activity concentrations of naturally occurring radionuclides. Naturally occurring Po (half-life138 days) and Pb (half-life 22.3 years) are members of the U decay chain. In the marine environment, Po and Pb are pr...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Limnology and Oceanography
سال: 1987
ISSN: 0024-3590
DOI: 10.4319/lo.1987.32.2.0313