极地研究

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Five-year bio-monitoring of aquatic ecosystems near Artigas Antarctic Scientific Base, King George Island

María A. Morel1*, Victoria Braña1, Cecilia Martínez-Rosales1,2, Célica Cagide1& Susana Castro-Sowinski1,2   

  1. 1 Microbiología Molecular, Instituto de Investigaciones Biológicas Clemente Estable (IIBCE), Montevideo, Uruguay;
    2 Bioquímica y Biología Molecular, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
  • 出版日期:1965-03-30 发布日期:1965-03-30
  • 通讯作者: María A. Morel

Five-year bio-monitoring of aquatic ecosystems near Artigas Antarctic Scientific Base, King George Island

María A. Morel1*, Victoria Braña1, Cecilia Martínez-Rosales1,2, Célica Cagide1& Susana Castro-Sowinski1,2   

  1. 1 Microbiología Molecular, Instituto de Investigaciones Biológicas Clemente Estable (IIBCE), Montevideo, Uruguay;
    2 Bioquímica y Biología Molecular, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
  • Online:1965-03-30 Published:1965-03-30
  • Contact: María A. Morel

摘要: Fildes Peninsula, in King George Island, Antarctica, has a great concentration of international facilities, and it has clearly been affected by human activities. The objective of this 5-year study was to assess the impact of anthropogenic activities on the bacterial abundance in water bodies close to Artigas Antarctic Scientific Base (BCAA, in Spanish Base Científica Antártica Artigas). Water samples from areas under different human influence (Uruguay Lake, nearby ponds, and meltwater from Collins Glacier) were aseptically collected and refrigerated until processed. The number of heterotrophic bacteria and Pseudomonas spp. was analyzed using a culture-dependent approach. Physico-chemical properties of the water samples (temperature, pH, and conductivity) were also determined. Results showed that water from the highly affected area, Uruguay Lake, where the pump that provides water to the BCAA is located, did not suffer significant fluctuations in heterotrophic bacterial abundance (104– 105 CFU?mL−1); however, Pseudomonas abundance increased until becoming the predominant population. In other water samples, the number of heterotrophic bacteria and Pseudomonas gradually increased during this 5-year study, by 2014 reaching similar values to those observed for Uruguay Lake. The implications of human activities on Antarctic bacterial abundance are discussed.

关键词: anthropogenic activities, water bodies, bacterial abundance

Abstract: Fildes Peninsula, in King George Island, Antarctica, has a great concentration of international facilities, and it has clearly been affected by human activities. The objective of this 5-year study was to assess the impact of anthropogenic activities on the bacterial abundance in water bodies close to Artigas Antarctic Scientific Base (BCAA, in Spanish Base Científica Antártica Artigas). Water samples from areas under different human influence (Uruguay Lake, nearby ponds, and meltwater from Collins Glacier) were aseptically collected and refrigerated until processed. The number of heterotrophic bacteria and Pseudomonas spp. was analyzed using a culture-dependent approach. Physico-chemical properties of the water samples (temperature, pH, and conductivity) were also determined. Results showed that water from the highly affected area, Uruguay Lake, where the pump that provides water to the BCAA is located, did not suffer significant fluctuations in heterotrophic bacterial abundance (104– 105 CFU?mL−1); however, Pseudomonas abundance increased until becoming the predominant population. In other water samples, the number of heterotrophic bacteria and Pseudomonas gradually increased during this 5-year study, by 2014 reaching similar values to those observed for Uruguay Lake. The implications of human activities on Antarctic bacterial abundance are discussed.

Key words: anthropogenic activities, water bodies, bacterial abundance