NDLI: Distribution patterns and environmental correlates of Thaumarchaeota abundance in six deep subalpine lakes

Content Provider	Springer Nature Link
Author	Callieri, Cristiana Hernández Avilés, Salvador Salcher, Michaela M. Fontaneto, Diego Bertoni, Roberto
Copyright Year	2015
Abstract	The presence of the mesophilic Thaumarchaeota (Thaum) in deep lakes seems to be restricted to oligotrophic lakes, where they have been found in the deep hypolimnion. We evaluated the vertical distribution of Thaum in six subalpine deep lakes, in spring and summer, to ascertain if there was a Thaum vertical gradient common to all the lakes in the region, possibly related to lake mixing and stratification. We examined nine environmental variables potentially correlated with Thaum abundance. Thaum abundance ranged from 0.61 × 103 to 236 × 103 cells mL−1, representing between 0.02 and 19 % of total prokaryotic cells, in the six lakes across different seasons. Although their absolute and relative abundance varied along the trophic gradient and with mixing conditions, a general pattern common to all the deep lakes was observed. In summer, the abundance of Thaum significantly increased with depth in all the lakes. Temperature emerged as the main environmental correlate of Thaum abundance in deep subalpine lakes. In spring, at low water temperature their abundance was significantly higher in warmer lakes and lower in colder lakes. Conversely, in summer, the correlation with temperature was inverse and Thaum thrived preferentially in the colder hypolimnion.
Starting Page	215
Ending Page	225
Page Count	11
File Format	PDF
ISSN	10151621
Journal	Aquatic Sciences
Volume Number	78
Issue Number	2
e-ISSN	14209055
Language	English
Publisher	Springer International Publishing
Publisher Date	2015-08-23
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Subalpine lakes Thaumarchaeota vertical profile CARD FISH Hypolimnion Freshwater & Marine Ecology Marine & Freshwater Sciences Oceanography Ecology Life Sciences
Content Type	Text
Resource Type	Article
Subject	Ecology Aquatic Science Water Science and Technology Ecology, Evolution, Behavior and Systematics

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