Soil properties and microbial indicators of samples from Lake Wellman, Darwin Mountains, Antarctica
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2012
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| _version_ | 1867168562416713728 |
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| author | Aislabie, Jackie Bockheim, James G McLeod, Malcolm Hunter, David Stevenson, Bryan Barker, Gary M |
| author_facet | Aislabie, Jackie Bockheim, James G McLeod, Malcolm Hunter, David Stevenson, Bryan Barker, Gary M |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Four pedons on each of four drift sheets in the Lake Wellman area of the Darwin Mountains were sampled for chemical and microbial analyses. The four drifts, Hatherton, Britannia, Danum, and Isca, ranged from early Holocene (10 ka) to mid-Quaternary (c. 900 ka). The soil properties of weathering stage, salt stage, and depths of staining, visible salts, ghosts, and coherence increase with drift age. The landforms contain primarily high-centred polygons with windblown snow in the troughs. The soils are dominantly complexes of Typic Haplorthels and Typic Haploturbels. The soils were dry and alkaline with low levels of organic carbon, nitrogen and phosphorus. Electrical conductivity was high accompanied by high levels of water soluble anions and cations (especially calcium and sulphate in older soils). Soil microbial biomass, measured as phospholipid fatty acids, and numbers of culturable heterotrophic microbes, were low, with highest levels detected in less developed soils from the Hatherton drift. The microbial community structure of the Hatherton soil also differed from that of the Britannia, Danum and Isca soils. Ordination revealed the soil microbial community structure was influenced by soil development and organic carbon. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_806198 |
| institution | PANGAEA |
| language | en |
| publishDate | 2012 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Soil properties and microbial indicators of samples from Lake Wellman, Darwin Mountains, Antarctica Aislabie, Jackie Bockheim, James G McLeod, Malcolm Hunter, David Stevenson, Bryan Barker, Gary M Antarctica; International Polar Year (2007-2008); IPY; LakeWellman; SOIL; Soil profile Four pedons on each of four drift sheets in the Lake Wellman area of the Darwin Mountains were sampled for chemical and microbial analyses. The four drifts, Hatherton, Britannia, Danum, and Isca, ranged from early Holocene (10 ka) to mid-Quaternary (c. 900 ka). The soil properties of weathering stage, salt stage, and depths of staining, visible salts, ghosts, and coherence increase with drift age. The landforms contain primarily high-centred polygons with windblown snow in the troughs. The soils are dominantly complexes of Typic Haplorthels and Typic Haploturbels. The soils were dry and alkaline with low levels of organic carbon, nitrogen and phosphorus. Electrical conductivity was high accompanied by high levels of water soluble anions and cations (especially calcium and sulphate in older soils). Soil microbial biomass, measured as phospholipid fatty acids, and numbers of culturable heterotrophic microbes, were low, with highest levels detected in less developed soils from the Hatherton drift. The microbial community structure of the Hatherton soil also differed from that of the Britannia, Danum and Isca soils. Ordination revealed the soil microbial community structure was influenced by soil development and organic carbon. |
| title | Soil properties and microbial indicators of samples from Lake Wellman, Darwin Mountains, Antarctica |
| topic | Antarctica; International Polar Year (2007-2008); IPY; LakeWellman; SOIL; Soil profile |
| url | https://doi.org/10.1594/PANGAEA.806198 |