A PRELIMINARY INVESTIGATION OF THE DIVERSITY, SURVIVABILITY AND DISPERSAL OF ALGAE INTRODUCED INTO ANTARCTICA BY HUMAN ACTIVITY (15th Symposium on Polar Biology)

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概要

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• Human activity was found to be an effective vector for the dispersal of microalgae to the Ross Sea regions of Antarctica. A total of 50 taxa, mostly typical soil algae, were identified as potential colonizers. Sample material included dust on equipment and boots of expeditioners taken prior to boarding aircraft bound for Antarctica, and soil adherrent to fresh vegetables imported into Scott Base, Ross Island. 10 taxa were from genera unrecorded in the Ross Sea regions. Cylindrospermum (Cyanophyta) and Eustigmatos (Eustigmatophyta) are relatively easily recognised and their spread could be monitored if they became established in Antarctic habitats. However, there was no evidence of the establishment of any exogenous algae even in highly perturbed habitats close to Scott Base. Airborne dispersal within Antarctica was found to disperse algal propagules in the vicinity of Scott Base, although numbers were very low, being two orders of magnitude lower than those found in New Zealand. The ability of indigenous Antarctic algae and exogenous potential colonizers to survive freeze-thaw cycles, high salinity and desiccation was investigated in laboratory experiments. In general, strains isolated from dust on boots and equipment and from New Zealand air showed high survivability, as did the indigenous Antarctic strains. In contrast, strains isolated from soil on fresh vegetables imported into Antarctica had low survival similar to those isolated from a typical moist New Zealand garden soil. Suggestions are provided on how these preliminary investigations can be extended and improved.

• 国立極地研究所の論文

著者

• BROADY Paul

  Department of Plant and Microbial Sciences, University of Canterbury

• Broady P

  Dep. Plant And Microbial Sci. Univ.

• Broady Paul

  Department Of Plant And Microbial Sciences University Of Canterbury

• Smith Robert

  National Institute Of Water And Atmosphere

関連論文

• Effects of salinity on growth and content on intracellular solutes in Heterococcus sp. (Tribonematales, Xanthophyceae) from Antarctica
• BIOGEOCHEMICAL FEATURES OF HYDROCARBONS IN CULTURED CYANOBACTERIA AND GREEN ALGAE FROM ANTARCTICA (17th Symposium on Polar Biology)
• EFFECTS OF SALINITY ON GROWTH AND CONTENT OF INTRACELLULAR SOLUTES IN Heterococcus sp. FROM ANTRACTICA
• A PRELIMINARY INVESTIGATION OF THE DIVERSITY, SURVIVABILITY AND DISPERSAL OF ALGAE INTRODUCED INTO ANTARCTICA BY HUMAN ACTIVITY (15th Symposium on Polar Biology)

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