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376 results for “McMurdo Dry Valleys”
Chemical characteristics of snow in the ablation zone of Canada Glacier in the McMurdo Dry Valleys, Antarctica during the 2016-2017 austral summer
This data package contains chemical characteristics of snow in the ablation zone of Canada Glacier, located in Taylor Valley, McMurdo Dry Valleys, Antarctica during the 2016-17 austral summer. Specifically, snow samples were collected from the ablation zones of Canada and Commonwealth Glaciers to characterize the chemistry of recent snowfall in the ablation zones of these glaciers. Samples were collected in triplicate near mass balance stakes on the same date ice cores were collected as part of a larger study characterizing the spatial and temporal geochemical evolution of glacial meltwater. A subset of snow samples collected from Canada Glacier have been analyzed and are included here. This package may be amended in the future if analysis of the remaining samples from both Canada and Commonwealth Glaciers occurs.
McMurdo Dry Valleys Chlorophyll-A Responses to Short-Term Soil Manipulation Experiment
A short-term soil manipulation experiment has been conducted as part of the McMurdo Dry Valleys Long Term Ecological Research (LTER) project. The chlorophyll-a concentration of soil samples was determined. Samples were taken on November 13, 1995, November 17, 1995, November 24, 1995 and December 11, 1995.
McMurdo Dry Valleys Soil Depth Effects on Soil Biota
Investigation of the effect of soil depth on soil biota and properties was part of the McMurdo Dry Valleys Long Term Ecological Research (LTER) project. The number of soil organisms (nematodes, rotifers and tardigrades), divided by species, sex and maturity was monitored at various soil depths in Taylor Valley in order to accomplish this. The study began in the austral summer of 1993/1994. Samples were taken on 20-Dec-1993, 6-Jan-1994, 21-Nov-1994 and 26-Dec-1994.
McMurdo Dry Valleys Soil Depth Effects on Anhydrobiosis of Nematodes
Investigation of the effect of soil depth on soil biota and properties was part of the McMurdo Dry Valleys Long Term Ecological Research (LTER) project. The proportion of soil nematodes found in an anhydrobiotic survival state was monitored at various soil depths in Taylor Valley to help accomplish this. Samples were taken on 21-Nov-1994 and 26-Dec-1994.
McMurdo Dry Valleys Soil Depth Effects on Chlorophyll-a Concentrations
Investigation of the effect of soil depth on soil biota and properties was part of the McMurdo Dry Valleys Long Term Ecological Research (LTER) project. Chlorophyll-a concentrations from soil samples collected for organism extraction and identification was monitored at various soil depths in Taylor Valley in order to accomplish this. Samples were taken on 21-Nov-1994 and 26-Dec-1994.
McMurdo Dry Valleys High Nutrient Influences on Soil Biota
Investigation of the effect of penguins (high C and N inputs) on soil biota was part of the McMurdo Dry Valleys Long Term Ecological Research (LTER) project. The number of soil organisms (nematodes, rotifers and tardigrades), divided by species, sex and maturity was monitored at Cape Crozier in order to accomplish this. Samples were gathered on December 5, 1997 from Cape Crozier.
McMurdo Dry Valleys Human Disturbances Effects on Chlorophyll-A
Concerns over environmental disturbance in the McMurdo Dry Valleys are increasing with increasing foot traffic from tourists and scientist. The effect of pedestrian disturbance was monitored by comparing the species composition, depth distribution and soil properties between adjacent high-, low- and no- traffic sites. This study began in the austral summer 1995/1996.
McMurdo Dry Valleys Human Disturbance Effects on soils - Soil Moisture
Concerns over environmental disturbance in the McMurdo Dry Valleys are increasing with increasing foot traffic from tourists and scientist. The effect of pedestrian disturbance were monitored by comparing the species composition, depth distribution and soil properties between adjacent high-, low- and no- traffic sites. This study began in the austral summer 1995/1996.
McMurdo Dry Valleys Human Disturbance Effects on soils - Soil Organism
Concerns over environmental disturbance in the McMurdo Dry Valleys are increasing with increasing foot traffic from tourists and scientist. The effect of pedestrian disturbance were monitored by comparing the species composition, depth distribution and soil properties between adjacent high-, low- and no- traffic sites. This study began in the austral summer 1995/1996.
McMurdo Dry Valleys Soil Moistures for Soil Biota Distribution Experiment
Investigation of the variation in soil biota and soil properties across the McMurdo Dry Valleys was part of the McMurdo Dry Valleys Long Term Ecological Research (LTER) project.  The moisture content of soil samples collected for organism extraction and identification was determined.   The study began in the austral summer of 1993/1994. Samples were taken on:    * December 31, 1993  * January 3, 8, 10 and 13, 1994,  * December 12 and 22, 1994,  * January 6 and 9, 1995,  * November 1, 8, 16 and 27, 1995,  * December 5 and 7, 1995, and  * January 12, 1998. Â
McMurdo Dry Valleys Biota Found in Soil Biota Distribution Experiment
 Investigation of the variation in soil biota and soil properties across the McMurdo Dry Valleys was part of the McMurdo Dry Valleys Long Term Ecological Research (LTER) project.  The number of soil organisms (nematodes, rotifers and tardigrades), divided by species, sex and maturity was monitored at sampling sites throughout the region in order to accomplish this.    The study began in the austral summer of 1993/1994. Samples were taken on:      * December 31, 1993   * January 3, 8, 10 and 13, 1994,   * December 12 and 22, 1994,   * January 6 and 9, 1995,   * November 27, 1995,   * December 5, 7 and 10, 1995, and   * January 12, 1998. Â
McMurdo Dry Valleys Chlorophyll-a Concentrations for Soil Biota Distribution Experiment
 Investigation of the variation in soil biota and soil properties across the McMurdo Dry Valleys was part of the McMurdo Dry Valleys Long Term Ecological Research (LTER) project. Chlorophyll-a concentrations from soil samples collected for organism extraction and identification  was determined. Chlorophyll-a samples were gathered on the following dates:   * December 12 and 22, 1994,  * January 9, 1995,  * November 8, 1995,  * December 7, 1995, and  * January 12, 1998. Â
McMurdo Dry Valleys Diurnal Effects on Anhydrobiosis of Nematodes
Investigation of the effect of short-term variation in soil moisture and soil temperature on nematode anhydrobiosis as part of the McMurdo Dry Valleys Long Term Ecological Research (LTER) project. The percent of anhydrobiotic (coiled) nematodes with relation to soil moisture and temperature was determined. The study began at 0930 on 22 December 1997 and ended on 23 December 1997. The samples were taken at 0, 6, 12, 18, and 24 hrs, at the south side of the Lake Hoare.
McMurdo Dry Valleys Diurnal Effects on Soil Moisture
Investigation of the effect of short-term variation in soil moisture and soil temperature on nematode anhydrobiosis as part of the McMurdo Dry Valleys Long Term Ecological Research (LTER) project. The percent of anhydrobiotic nematodes with relation to soil moisture and temperature was determined. The study began at 0930 on 22 December 1997 and ended on 23 December 1997. The samples were taken at 0, 6, 12, 18, and 24 hrs.
McMurdo Dry Valleys Diurnal Effects on Soil Biota
Investigation of the effect of short-term variation in soil moisture and soil temperature  on nematode anhydrobiosis as part of the McMurdo Dry Valleys Long Term Ecological Research (LTER) project. The percent of anhydrobiotic nematodes with relation to soil moisture and temperature was determined.   The study began at 0930 on 22 December 1997 and ended on 23 December 1997. The samples were taken at 0, 6, 12, 18, and 24 hrs.Â
McMurdo Dry Valleys Seasonal Effects on Anhydrobiosis of Nematodes
Investigation of the effect of long-term variation in soil moisture and soil temperature on nematode anhydrobiosis as part of the McMurdo Dry Valleys Long Term Ecological Research (LTER) project. The percent of anhydrobiotic (coiled) nematodes with relation to season was determined. The study took place on three separate dates during the 1997-1998 austral summer: 21 November 1997, 16 December 1997, and 13 January 1998.
McMurdo Dry Valleys Seasonal Effects on Electrical Conductivity
Investigation of the effect of long-term variation in soil moisture and soil temperature on nematode anhydrobiosis as part of the McMurdo Dry Valleys Long Term Ecological Research (LTER) project. The percent of anhydrobiotic (coiled) nematodes with relation to season was determined. The study took place on three separate dates during the 1997-1998 austral summer: 21 November 1997, 16 December 1997, and 13 January 1998.
McMurdo Dry Valleys Seasonal Effects on Soil Moisture
Investigation of the effect of long-term variation in soil moisture and soil temperature on nematode anhydrobiosis as part of the McMurdo Dry Valleys Long Term Ecological Research (LTER) project. The percent of anhydrobiotic (coiled) nematodes with relation to season was determined. The study took place on three separate dates during the 1997-1998 austral summer: 21 November 1997, 16 December 1997, and 13 January 1998.
McMurdo Dry Valleys Seasonal Effects on Soil Biota
Investigation of the effect of long-term variation in soil moisture and soil temperature on nematode anhydrobiosis as part of the McMurdo Dry Valleys Long Term Ecological Research (LTER) project. The percent of anhydrobiotic (coiled) nematodes with relation to season was determined. Â The study took place on three separate dates during the 1997-1998 austral summer: 21 November 1997, 16 December 1997, and 13 January 1998, samples were gathered at the south side of the Lake Hoare
McMurdo Dry Valleys Soil Effects on Anhydrobiosis of Nematodes
Investigation of the effect of short-term variation in soil moisture and soil temperature on nematode anhydrobiosis as part of the McMurdo Dry Valleys Long Term Ecological Research (LTER) project. Â The percent of anhydrobiotic (coiled) nematodes with relation to soil moisture, temperature, and salinity was determined. Â The study began in the austral summer of 1996/1997. Locations on the south sides of both the Lake Hoare and Fryxell. Also, at a moss site near the Canada Glacier. Â Samples gathered on Jan 1st 1997
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