The cyanobacterial community of polygon soils at an inland Antarctic nunatak |
| |
Authors: | Marcus Brinkmann David A Pearce Peter Convey Sieglinde Ott |
| |
Institution: | (1) Botanisches Institut, Heinrich-Heine-Universitaet, Universitaetsstr. 1, 40225 Duesseldorf, Germany;(2) British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge, CB3 0ET, UK |
| |
Abstract: | Inland Antarctic terrestrial ecosystems and biodiversity are poorly understood in comparison with Antarctic coastal regions.
Microorganisms, as primary colonists, are integral to Antarctic soil ecosystem development, essential for pedogenesis and
structuring the soil, and providing the nutrients necessary for the subsequent establishment of macroorganisms. This study
analysed the microbial communities present in polygon soils of Coal Nunatak (Alexander Island, at the southern limit of the
maritime Antarctic). Soils were analysed across three polygons (centre and margins) and at three depths (0–1, 1–2, 2–5 cm).
Cyanobacterial communities were characterised using two complementary molecular biological approaches, temperature gradient
gel electrophoresis and clone library analysis. The three polygons exhibited conspicuous differences in community composition,
both between different polygons and spatially (horizontally and vertically) within a single polygon. Comparison of our data
with that from previous studies using classical culture and morphological identification techniques clearly shows the need
for more intensive research on patterns of microbial diversity in terrestrial habitats throughout the Antarctic. The majority
of the 17 cyanobacterial genera identified at Coal Nunatak are thought to have ubiquitous distributions, while none are known
only from the Antarctic. Three of the genera present are also known to be capable of being lichen photobionts. |
| |
Keywords: | Microbiota Microbial diversity TGGE Clone library Alexander Island |
本文献已被 SpringerLink 等数据库收录! |
|