Aerosol measurements at Palmer Station, Antarctica

1990 ◽  
pp. 1-5 ◽  
Author(s):  
V. K. Saxena ◽  
F. H. Ruggiero
Keyword(s):  
Palmer Station

scholarly journals The Palmer LTER: A Long-Term Ecological Research Program at Palmer Station, Antarctica

Oceanography ◽  
1995 ◽  
Vol 8 (3) ◽  
pp. 77-86 ◽  
Author(s):  
Raymond Smith ◽  
Karen Baker ◽  
William Fraser ◽  
Eileen Hofmann ◽  
David Karl ◽  
...  
Keyword(s):  
Research Program ◽  
Ecological Research ◽  
Long Term Ecological Research ◽  
Palmer Station ◽  
Ecological Research Program

Atmospheric trace gas measurements at Palmer Station, Antarctica: 1982?83

1984 ◽  
Vol 2 (1) ◽  
pp. 65-81 ◽  
Author(s):  
E. Robinson ◽  
W. L. Bamesberger ◽  
F. A. Menzia ◽  
A. S. Waylett ◽  
S. F. Waylett
Keyword(s):  
Trace Gas ◽  
Palmer Station ◽  
Gas Measurements ◽  
Atmospheric Trace Gas

Southern Elephant Seal Pupping at Palmer Station, Antarctica

1986 ◽  
Vol 67 (1) ◽  
pp. 189-190 ◽  
Author(s):  
R. J. Heimark ◽  
G. M. Heimark
Keyword(s):  
Elephant Seal ◽  
Southern Elephant Seal ◽  
Palmer Station

Ethanol-extractable substrate pools and the incorporation of thymidine, L-leucine, and other substrates by bacterioplankton

1992 ◽  
Vol 38 (7) ◽  
pp. 605-613 ◽  
Author(s):  
James T. Hollibaugh ◽  
Patricia S. Wong
Keyword(s):  
San Francisco ◽  
San Francisco Bay ◽  
Low Molecular Weight ◽  
Storage Mechanism ◽  
Bacterioplankton Production ◽  
Organic Extraction ◽  
Palmer Station ◽  
Filter Type ◽  
Tomales Bay ◽  
Productivity Measurements

Bacterioplankton productivity measurements based on [methyl-3H]-thymidine (TdR) or L-[3,4,5-3H]leucine (L-leu) incorporation typically depend on cold trichloroacetic acid (TCA) precipitation to separate 3H uptake from incorporation. An additional rinse with cold 80% ethanol (EtOH) removed an average of 22 (L-leu) and 32% (TdR) of 3H "incorporated" by San Francisco Bay samples and decreased the between-duplicate difference by a factor of 3.5. Similar results were obtained with samples from Tomales Bay, Calif., and Palmer Station, Antarctica. Varying amounts of cold TCA insoluble radiolabel from six other substrates were removed by the EtOH rinse. Regression analysis showed relationships between the effect of the EtOH rinse and a group of environmental variables and derived parameters. The percentage of 3H removed was generally independent of filter type; however, there were often large differences in the amount of 3H retained by Millipore versus Nuclepore or Poretics filters. The results strongly suggest that an EtOH rinse or other organic extraction should be included in protocols to determine incorporation of radiolabeled substrates into macromolecules. Furthermore, sequestering low molecular weight substrates in some sort of lipid-bound pool may represent a general storage mechanism employed by bacterioplankton. Key words: bacterioplankton, production, San Francisco Bay, filtration, incorporation.

scholarly journals Short Note: Increase in feeding by the tick, Ixodes uriae, on Adélie penguins during a prolonged summer

2008 ◽  
Vol 21 (2) ◽  
pp. 151-152 ◽  
Author(s):  
Joshua B. Benoit ◽  
Giancarlo Lopez-Martinez ◽  
Michael A. Elnitsky ◽  
Richard E. Lee ◽  
David L. Denlinger
Keyword(s):  
Tick Species ◽  
Short Note ◽  
Research Area ◽  
Adélie Penguin ◽  
Adelie Penguin ◽  
Ixodes Uriae ◽  
Striking Increase ◽  
Palmer Station ◽  
Adélie Penguins

Ixodes uriae White is the only tick species found in Antarctica, and in our research area at Palmer Station it feeds predominantly on Adélie penguins. At the beginning of the summer the ticks leave their off-host aggregation sites, feed on penguins, then subsequently return to their off-host habitats, where they remain until the next summer (Benoit et al. 2007). These ticks have been implicated as a competent vector for Borrelia spirochetes (Olsen et al. 1993) and tick-borne viruses (Nuttall 1984), and are thought to impact development, cause anaemia, alter the thermoregulation, and even lead to the death of penguins (Gauthier-Clerc et al. 1998, Mangin et al. 2003). In this report, we note a striking increase in the number of fed ticks found near Adélie penguin rookeries in 2007 compared to 2006, suggesting that the longer and warmer summer of 2007 may have permitted more ticks to find their hosts. High levels of parasitism could be detrimental to the already declining Adélie penguin populations near Palmer Station (Fraser & Patterson 1997).

Mycorrhizal status of Deschampsia antarctica in the Palmer Station area, Antarctica

Mycologia ◽  
1995 ◽  
Vol 87 (4) ◽  
pp. 451-453 ◽  
Author(s):  
Brent G. DeMars ◽  
Ralph E. J. Boerner
Keyword(s):  
Deschampsia Antarctica ◽  
Mycorrhizal Status ◽  
Palmer Station
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