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Vegetation changes in the Jornada Basin from 1858 to 1998
Abstract Notes made by land surveyors in 1858 were utilized to estimate cover of grasses and shrubs on the Jornada Experimental Range (JER) and the Chihuahuan Desert Range Research Center (CDRRC) inExpand
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Marine Molluscs as Indicators of Environmental Change in Glaciated North America and Greenland During the Last 18 000 Years
Dated mollusc collections are classified in assemblages to map paleo-faunistic zones. Hiatella arctica and Mya truncata account for almost half the records and comprise a restricted arcticExpand
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A high resolution proxy-climate record from an arctic lake with annually-laminated sediments on Devon Island, Nunavut, Canada
Sediments from a 3 ha lake (75 °34.34′N, 89 °18.55′W) from the coastal region of northern Devon Island, Nunavut, Canada, contain discrete laminations in the deepest part of the basin. The laminationsExpand
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Seasonal Sediment and Diatom Record from Late Holocene Laminated Sediments, Effingham Inlet, British Columbia, Canada
Abstract Laminated diatomaceous sediments from Effingham Inlet, British Columbia, are described and classified in this study. Analyses were made from ten 15-cm long sediment slabs, spanning the lastExpand
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Recent rates of mesquite establishment in the northern Chihuahuan Desert.
Honey mesquite (Prosopis glandulosa Torr. var. glandulosa populations continue to expand and become more dense, even on areas once "successfully" treated either with herbicides or by bulldozing inExpand
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Trace metal profiles in the varved sediment of an Arctic lake
Abstract Varved (annually-laminated) sediments offer a rare and physically undisturbed archive of past trace metal deposition and limnological conditions. Here, a high-resolution 1,300 year record ofExpand
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Teeth as biomonitors of soft tissue mercury concentrations in beluga, Delphinapterus leucas
This paper reports relationships between bulk Hg concentrations in the tooth cementum and soft tissues of free-living beluga (Delphinapterus leucas). Total Hg levels were determined in slivers ofExpand
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The calculation of lead-210 dates for McKay Lake sediments
Lead-210 dates are assigned to a sediment core retrieved from McKay Lake, Ottawa, Canada. Sediment mixing is found to have little, but discernible, influence on the age/depth profile. ConsiderationExpand
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