DOI: 10.1111/gcb.14285
Scopus记录号: 2-s2.0-85047553770
论文题名: Temperature sensitivity of soil microbial activity modeled by the square root equation as a unifying model to differentiate between direct temperature effects and microbial community adaptation
作者: Bååth E.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 7 起始页码: 2850
结束页码: 2861
语种: 英语
英文关键词: microbial growth
; Q10
; respiration
; soil
; T min
; temperature sensitivity
Scopus关键词: adaptation
; microbial activity
; numerical model
; soil microorganism
; soil respiration
; temperature effect
英文摘要: Numerous models have been used to express the temperature sensitivity of microbial growth and activity in soil making it difficult to compare results from different habitats. Q10 still is one of the most common ways to express temperature relationships. However, Q10 is not constant with temperature and will differ depending on the temperature interval used for the calculation. The use of the square root (Ratkowsky) relationship between microbial activity (A) and temperature below optimum temperature, √A = a × (T−Tmin), is proposed as a simple and adequate model that allow for one descriptor, Tmin (a theoretical minimum temperature for growth and activity), to estimate correct Q10-values over the entire in situ temperature interval. The square root model can adequately describe both microbial growth and respiration, allowing for an easy determination of Tmin. Q10 for any temperature interval can then be calculated by Q10 = [(T + 10 − Tmin)/(T−Tmin)]2, where T is the lowest temperature in the Q10 comparison. Tmin also describes the temperature adaptation of the microbial community. An envelope of Tmin covering most natural soil habitats varying between −15°C (cold habitats like Antarctica/Arctic) to 0°C (tropical habitats like rain forests and deserts) is suggested, with an 0.3°C increase in Tmin per 1°C increase in mean annual temperature. It is shown that the main difference between common temperature relationships used in global models is differences in the assumed temperature adaptation of the soil microbial community. The use of the square root equation will allow for one descriptor, Tmin, determining the temperature response of soil microorganisms, and at the same time allow for comparing temperature sensitivity of microbial activity between habitats, including future projections. © 2018 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110330
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Microbial Ecology, Department of Biology, Ecology Building, Lund University, Lund, Sweden
Recommended Citation:
Bååth E.. Temperature sensitivity of soil microbial activity modeled by the square root equation as a unifying model to differentiate between direct temperature effects and microbial community adaptation[J]. Global Change Biology,2018-01-01,24(7)