Temperature adaptation of soil bacterial communities along an Antarctic climate gradient: predicting responses to climate warming

Riikka Rinnan; Johannes Rousk; Etienne Yergeau; George A. Kowalchuk; Erland Bååth

doi:10.1111/j.1365-2486.2009.01959.x

Temperature adaptation of soil bacterial communities along an Antarctic climate gradient: predicting responses to climate warming

Riikka Rinnan, Johannes Rousk, Etienne Yergeau, George A. Kowalchuk, Erland Bååth

Terrestrial Ecology

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

123 Citationer (Scopus)

Abstract

Udgivelsesdato: November 2009

Originalsprog	Engelsk
Tidsskrift	Global Change Biology
Vol/bind	15
Udgave nummer	11
Sider (fra-til)	2615–2625
ISSN	1354-1013
DOI	https://doi.org/10.1111/j.1365-2486.2009.01959.x
Status	Udgivet - 2009

Bibliografisk note

Keywords:Antarctic;bacterial growth;climate warming;community adaptation;leucine incorporation;Q10;soil;temperature response

Adgang til dokumentet

10.1111/j.1365-2486.2009.01959.x

Citationsformater

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title = "Temperature adaptation of soil bacterial communities along an Antarctic climate gradient: predicting responses to climate warming",

abstract = "Soil microorganisms, the central drivers of terrestrial Antarctic ecosystems, are being confronted with increasing temperatures as parts of the continent experience considerable warming. Here we determined short-term temperature dependencies of Antarctic soil bacterial community growth rates, using the leucine incorporation technique, in order to predict future changes in temperature sensitivity of resident soil bacterial communities. Soil samples were collected along a climate gradient consisting of locations on the Antarctic Peninsula (Anchorage Island, 67 °34'S, 68 °08'W), Signy Island (60 °43'S, 45 °38'W) and the Falkland Islands (51 °76'S 59 °03'W). At each location, experimental plots were subjected to warming by open top chambers (OTCs) and paired with control plots on vegetated and fell-field habitats. The bacterial communities were adapted to the mean annual temperature of their environment, as shown by a significant correlation between the mean annual soil temperature and the minimum temperature for bacterial growth (Tmin). Every 1 °C rise in soil temperature was estimated to increase Tmin by 0.24-0.38 °C. The optimum temperature for bacterial growth varied less and did not have as clear a relationship with soil temperature. Temperature sensitivity, indicated by Q10 values, increased with mean annual soil temperature, suggesting that bacterial communities from colder regions were less temperature sensitive than those from the warmer regions. The OTC warming (generally <1 °C temperature increases) over 3 years had no effects on temperature relationship of the soil bacterial community. We estimate that the predicted temperature increase of 2.6 °C for the Antarctic Peninsula would increase Tmin by 0.6-1 °C and Q10 (0-10 °C) by 0.5 units.",

author = "Riikka Rinnan and Johannes Rousk and Etienne Yergeau and Kowalchuk, {George A.} and Erland B{\aa}{\aa}th",

note = "Keywords:Antarctic;bacterial growth;climate warming;community adaptation;leucine incorporation;Q10;soil;temperature response",

year = "2009",

doi = "10.1111/j.1365-2486.2009.01959.x",

language = "English",

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T1 - Temperature adaptation of soil bacterial communities along an Antarctic climate gradient: predicting responses to climate warming

AU - Rinnan, Riikka

AU - Rousk, Johannes

AU - Yergeau, Etienne

AU - Kowalchuk, George A.

AU - Bååth, Erland

N1 - Keywords:Antarctic;bacterial growth;climate warming;community adaptation;leucine incorporation;Q10;soil;temperature response

PY - 2009

Y1 - 2009

N2 - Soil microorganisms, the central drivers of terrestrial Antarctic ecosystems, are being confronted with increasing temperatures as parts of the continent experience considerable warming. Here we determined short-term temperature dependencies of Antarctic soil bacterial community growth rates, using the leucine incorporation technique, in order to predict future changes in temperature sensitivity of resident soil bacterial communities. Soil samples were collected along a climate gradient consisting of locations on the Antarctic Peninsula (Anchorage Island, 67 °34'S, 68 °08'W), Signy Island (60 °43'S, 45 °38'W) and the Falkland Islands (51 °76'S 59 °03'W). At each location, experimental plots were subjected to warming by open top chambers (OTCs) and paired with control plots on vegetated and fell-field habitats. The bacterial communities were adapted to the mean annual temperature of their environment, as shown by a significant correlation between the mean annual soil temperature and the minimum temperature for bacterial growth (Tmin). Every 1 °C rise in soil temperature was estimated to increase Tmin by 0.24-0.38 °C. The optimum temperature for bacterial growth varied less and did not have as clear a relationship with soil temperature. Temperature sensitivity, indicated by Q10 values, increased with mean annual soil temperature, suggesting that bacterial communities from colder regions were less temperature sensitive than those from the warmer regions. The OTC warming (generally <1 °C temperature increases) over 3 years had no effects on temperature relationship of the soil bacterial community. We estimate that the predicted temperature increase of 2.6 °C for the Antarctic Peninsula would increase Tmin by 0.6-1 °C and Q10 (0-10 °C) by 0.5 units.

AB - Soil microorganisms, the central drivers of terrestrial Antarctic ecosystems, are being confronted with increasing temperatures as parts of the continent experience considerable warming. Here we determined short-term temperature dependencies of Antarctic soil bacterial community growth rates, using the leucine incorporation technique, in order to predict future changes in temperature sensitivity of resident soil bacterial communities. Soil samples were collected along a climate gradient consisting of locations on the Antarctic Peninsula (Anchorage Island, 67 °34'S, 68 °08'W), Signy Island (60 °43'S, 45 °38'W) and the Falkland Islands (51 °76'S 59 °03'W). At each location, experimental plots were subjected to warming by open top chambers (OTCs) and paired with control plots on vegetated and fell-field habitats. The bacterial communities were adapted to the mean annual temperature of their environment, as shown by a significant correlation between the mean annual soil temperature and the minimum temperature for bacterial growth (Tmin). Every 1 °C rise in soil temperature was estimated to increase Tmin by 0.24-0.38 °C. The optimum temperature for bacterial growth varied less and did not have as clear a relationship with soil temperature. Temperature sensitivity, indicated by Q10 values, increased with mean annual soil temperature, suggesting that bacterial communities from colder regions were less temperature sensitive than those from the warmer regions. The OTC warming (generally <1 °C temperature increases) over 3 years had no effects on temperature relationship of the soil bacterial community. We estimate that the predicted temperature increase of 2.6 °C for the Antarctic Peninsula would increase Tmin by 0.6-1 °C and Q10 (0-10 °C) by 0.5 units.

U2 - 10.1111/j.1365-2486.2009.01959.x

DO - 10.1111/j.1365-2486.2009.01959.x

M3 - Journal article

SN - 1354-1013

VL - 15

SP - 2615

EP - 2625

JO - Global Change Biology

JF - Global Change Biology

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ER -