Diana H. WallRoss A. Virginia 2014-11-12 Human Disturbance Effects on soils - Soil Moisture tabular digitial data McMurdo Dry Valleys LTER McMurdo Dry Valleys LTER 10.6073/pasta/f11305edc51d672f3da7cb026c5e546a https://mcm.lternet.edu/content/human-disturbance-effects-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. 1995-10-01 1997-04-01 ground condition This file was created by Mark St. John on 9 Nov 1998, using raw data from the Excel workbook '9612diso.raw'. The file format was suggested by the LTER data manager, to conform with the relational database structure. As needed Long Term Manipulation Experiment at South Side of Lake Hoare LTM 162.882125854492 162.882125854492 -77.632965087891 -77.632965087891 LTER Core Areas disturbance population dynamics None <cntorg>McMurdo Dry Valleys LTER</cntorg> <onlink>http://mcmlter.org/</onlink> <span property="dc:title" content="McMurdo Dry Valleys LTER" class="rdf-meta element-hidden"></span> Name: John "Jeb" E. Barrett Role: associated researcher Name: Laura E Powers Role: field crew Name: Johnson Nkem Role: field crew Name: Byron J. Adams Role: field crew Name: Emma Broos Role: field crew Name: Denise Steigerwald Role: data manager Name: Inigo San Gil Role: data manager Not Applicable Not Applicable Field and/or Lab Methods  Sampling bags were prepared with one sterile 'Whirlpak' bag and clean plastic scoop per sample. Soils were sampled from three areas: heavy traffic (H), light traffic (L) and control (C) where soils had not been walked upon; and at 2.5 and 10 cm depths. The location of the sampling was recorded each year so that areas were not re-sampled. Using the plastic scoop, soil was collected to 10 cm depth. Very large rocks (&gt;20 mm diameter) were excluded from the sample.     The soil was shoveled into the 'Whirlpak' bag until three quarters full (about 1.5 kg soil). The soil was mixed well in the bag, then the bag was closed tightly, expelling as much air as possible. The soil samples were stored in a cooler for transportation. On return to the laboratory (within 8 hours of sampling), the soils were stored at 5 C until further processing.   In the laboratory, soil samples were handled in a laminar flow hood to prevent contamination. The Whirlpak bags of soil were mixed thoroughly prior to opening. Approximately 200cm3 of soil was placed in a pre-weighed 800mL plastic beaker. Rocks greater than 3-4mm in diameter were removed from the sample. A sub-sample of approximately 50g was removed and placed in a pre-weighed aluminum dish, and weighed on a balance accurate to 0.01g. This sample was dried at 105C for 24 hours. The sample was removed, placed in desiccator to cool down, and re-weighed. These data were used to calculate water content of the soil and to express data as numbers of soil organisms per unit dry weight of soil.    Sampling bags were prepared with one sterile 'Whirlpak' bag and clean plastic scoop per sample. Soils were sampled from three areas: heavy traffic (H), light traffic (L) and control (C) where soils had not been walked upon; and at 2.5 and 10 cm depths. The location of the sampling was recorded each year so that areas were not re-sampled. Using the plastic scoop, soil was collected to 10 cm depth. Very large rocks (>20 mm diameter) were excluded from the sample.   The soil was shoveled into the 'Whirlpak' bag until three quarters full (about 1.5 kg soil). The soil was mixed well in the bag, then the bag was closed tightly, expelling as much air as possible. The soil samples were stored in a cooler for transportation. On return to the laboratory (within 8 hours of sampling), the soils were stored at 5 C until further processing. In the laboratory, soil samples were handled in a laminar flow hood to prevent contamination. The Whirlpak bags of soil were mixed thoroughly prior to opening. Approximately 200cm3 of soil was placed in a pre-weighed 800mL plastic beaker. Rocks greater than 3-4mm in diameter were removed from the sample. A sub-sample of approximately 50g was removed and placed in a pre-weighed aluminum dish, and weighed on a balance accurate to 0.01g. This sample was dried at 105C for 24 hours. The sample was removed, placed in desiccator to cool down, and re-weighed. These data were used to calculate water content of the soil and to express data as numbers of soil organisms per unit dry weight of soil.  unknown 9597diso LOCATION Name of area where measurement was made The data provider Name of area where measurement was made DATE_TIME Date on which sample was gathered The data provider calendar date/time mm/dd/yyyy gregorian calendar SAMPLE # Sample ID The data provider Sample ID SOIL WATER CONTENT (%) Percent water found in soil The data provider dimensionless COMMENTS Helpful hints about the sample The data provider Helpful hints about the sample FILE NAME Name of file in which data was stored The data provider Name of file in which data was stored McMurdo Dry Valleys LTER The data distributor shall not be liable for innacuracies in the content http 1 0 \n 1 column , https://mcm.lternet.edu/sites/default/files/9597diso.csv None 2014-11-12 2014-11-12 McMurdo Dry Valleys LTER http://mcmlter.org/ Biological Data Profile of the Content Standards for Digital Geospatial Metadata devised by the Federal Geographic Data Committee. Drupal Ecological information Management Systems, version D7, Biological Data Profile module