Soils and their microbiological properties from a transect from Cape Horn to the Antarctic Peninsula

概要

論文の詳細を見る
Soils of the southernmost islands of South America (Cape Horn), the Falkland Islands, South Georgia, South Orkneys, South Shetlands, the Antarctic Peninsula and Poulet Island are described and analyzed for soil properties, soil taxonomy and microorganisms. Results showed a great variety of soils. Leptosols, gleysols, regosols, cambisols, podzols, andosols and histosols are described. Podzolization was found in all climatic regions. Influences of bird colonies can be demonstrated by extractable phosphate and low C/N ratios. The bacterial flora is described via total counts (range between 0.06-10.45・10^9g^<-1>d. wt.) and biomass distributions (range between 0.47-102.7μgCg^<-1> d. wt.) in different soil layers. Total number or total biomass are not related to geographic or internal soil patterns but to contents of organic matter. Similarly, mean cell volumes of bacteria (range between 0.06 and 0.1μm^3) are found to be related to nutrient levels. Distributions of bacterial communities show individual patterns of soil profiles and are not related to an overall geographical pattern.
国立極地研究所の論文