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Title: Biological chlorine cycling in the Arctic Coastal Plain

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Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
National Science Foundation (NSF)
OSTI Identifier:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Biogeochemistry; Journal Volume: 134; Journal Issue: 3
Country of Publication:
United States

Citation Formats

Zlamal, Jaime E., Raab, Theodore K., Little, Mark, Edwards, Robert A., and Lipson, David A. Biological chlorine cycling in the Arctic Coastal Plain. United States: N. p., 2017. Web. doi:10.1007/s10533-017-0359-0.
Zlamal, Jaime E., Raab, Theodore K., Little, Mark, Edwards, Robert A., & Lipson, David A. Biological chlorine cycling in the Arctic Coastal Plain. United States. doi:10.1007/s10533-017-0359-0.
Zlamal, Jaime E., Raab, Theodore K., Little, Mark, Edwards, Robert A., and Lipson, David A. Fri . "Biological chlorine cycling in the Arctic Coastal Plain". United States. doi:10.1007/s10533-017-0359-0.
title = {Biological chlorine cycling in the Arctic Coastal Plain},
author = {Zlamal, Jaime E. and Raab, Theodore K. and Little, Mark and Edwards, Robert A. and Lipson, David A.},
abstractNote = {},
doi = {10.1007/s10533-017-0359-0},
journal = {Biogeochemistry},
number = 3,
volume = 134,
place = {United States},
year = {Fri Jul 07 00:00:00 EDT 2017},
month = {Fri Jul 07 00:00:00 EDT 2017}
  • The draft environmental impact statement describes the procedures and probable effects of aerial and geological surveying for oil and gas in the coastal area of Alaska's Arctic National Wildlife Refuge. The procedures provide for the protection of caribou caving areas and the avoidance of duplication in the survey activities. Temporary disturbances from seismic surveys would interfere with wildlife breeding and migration due to changes in the habitat. The Alaska National Interest Lands Conservation Act of 1980 provides the legal mandate for environmental assessment.
  • The dominant landscape process on the Arctic Coastal Plain of northern Alaska is the formation and drainage of thaw lakes. Lakes and drained thaw lake basins account for approximately 75% of the modern surface expression of the Barrow Peninsula. The thaw lake cycle usually obliterates lacustrine or peat sediments from previous cycles which could otherwise be used for paleoecological reconstruction of long-term landscape and vegetation changes. Several possible erosional remnants of a former topographic surface that predates the formation of the thaw lakes have been tentatively identified. These remnants are characterized by a higher elevation, a thick organic layer withmore » very high ground ice content in the upper permafrost, and a plant community somewhat atypical of the region. Ten soil cores were collected from one site, and one core was intensively sampled for soil organic carbon content, pollen analysis, and {sup 14}C dating. The lowest level of the organic sediments represents the earliest phase of plant growth and dates to ca. 9000 cal BP. Palynological evidence indicates the presence of mesic shrub tundra (including sedge, birch, willow, and heath vegetation); and microfossil indicators point to wetter eutrophic conditions during this period. Carbon accumulation was rapid due to high net primary productivity in a relatively nutrient-rich environment. These results are interpreted as the local response to ameliorating climate during the early Holocene. The middle Holocene portion of the record contains an unconformity, indicating that between 8200 and 4200 cal BP sediments were eroded from the site, presumably in response to wind activity during a drier period centered around 4500 cal BP. The modern vegetation community of the erosional remnant was established after 4200 cal BP, and peat growth resumed. During the late Holocene, carbon accumulation rates were greatly reduced in response to the combined effects of declining productivity associated with climatic cooling, and increased nutrient stress as paludification and permafrost aggradation sequestered mineral nutrients.« less
  • Hydrolyzable amino acids were measured in cores and surface sediment samples collected over a 14 month period from the rapidly accumulating, anoxic sediments of Cape Lookout Bight, NC. The concentration of total hydrolyzable amino acids (THAAs) shows an exponential decrease with depth, in a manner similar to total organic carbon and total nitrogen. Carbon and nitrogen in THAAs averages 10-15% of the total organic carbon and 30-40% of the total nitrogen in these sediments. In surface sediments the concentration of THAAs do not show strong seasonal variations, with the exception of a small apparent decrease during the winter months. Asparticmore » acid, glutamic acid, glycine and alanine are the most abundant individual amino acids in Cape Lookout Bight sediments. The distribution of individual amino acids in these sediments is very similar to that observed in the two major sources of organic matter, vascular salt marsh plants and marine plankton. The mole fractions of most amino acids show no depth variation in Cape Lookout Bight sediments. Kinetic modeling of these data indicates that the deposition of amino acids to the surface of these sediments is 5.8 {plus minus} 1.0 mol{center dot}m{sup {minus}2}{center dot}yr{sup {minus}1}. Approximately 46 {plus minus} 16% of this input is remineralized in the upper 40 cm. The recycling of amino acids accounts for 82 {plus minus} 43% of the total nitrogen regeneration and 27 {plus minus} 11% of the regeneration of total organic carbon in these sediments. The mean residence time of metabolizable amino acids is approx. 9 months, a value which is comparable to the mean residence time of both metabolizable organic carbon and nitrogen in these sediments.« less
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