Comparing temperature sensitivity of bacterial growth in Antarctic marine water and soi

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Abstract

The western Antarctic Peninsula is an extreme low temperature environment that is warming rapidly due to global change. Little is known, however, about the temperature sensitivity of growth of microbial communities in Antarctic soils and in the surrounding oceanic waters. This is the first study that directly compares temperature adaptation of adjacent marine and terrestrial bacteria in a polar environment. The bacterial communities in the ocean were adapted to lower temperatures than those from nearby soil, with cardinal temperatures for growth in the ocean being the lowest so far reported for microbial communities. This was reflected in lower minimum (Tmin) and optimum temperatures (Topt) for growth in water (‐17°C and +20°C, respectively) than in soil (‐11°C and +27°C), with lower sensitivity to changes in temperature (Q10; 0‐10°C interval) in Antarctic water (2.7) than in soil (3.9). This is likely due to the more stable low temperature conditions
Original languageEnglish
JournalGlobal Change Biology
DOIs
StatePublished - Jan 29 2020

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