English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  Temperature dependence of aerobic respiration in a coastal sediment

Thamdrup, B., Hansen, J., & Jørgensen, B. B. (1998). Temperature dependence of aerobic respiration in a coastal sediment. FEMS Microbiology Ecology, 25(2), 189-200. doi:10.1016/S0168-6496(97)00095-0.

Item is

Basic

show hide
Genre: Journal Article

Files

show Files
hide Files
:
Thamdrup_1998.pdf (Publisher version), 277KB
 
File Permalink:
-
Name:
Thamdrup_1998.pdf
Description:
-
Visibility:
Restricted ( Max Planck Society (every institute); )
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Thamdrup, B.1, Author              
Hansen, JW, Author
Jørgensen, Bo Barker1, Author              
Affiliations:
1Department of Biogeochemistry, Max Planck Institute for Marine Microbiology, Max Planck Society, ou_2481693              

Content

show
hide
Free keywords: -
 Abstract: The direct temperature dependence of aerobic respiration was determined in sediment from Aarhus Bay, Denmark, in incubations shorter than 12 h at temperature intervals of 1.7 degrees C. Oxygen consumption showed a bimodal distribution between -2 and 80 degrees C indicating the presence of distinct non-thermophilic and thermophilic populations. The thermophilic oxygen consumption had minimum, optimum, and maximum temperatures of 40, 55, and 65 degrees C, respectively, and accelerated strongly after a lag phase of 2-3 h, which may be due to an activation of spores. The sourer of this dormant thermophilic population is unknown. Oxygen consumption by the non-thermophilic population had minimum and maximum temperatures of < -1 and 45 degrees C, respectively. The optimum temperature increased from a broad plateau of 20-30 degrees C in late winter to 30-35 degrees C in late summer, and the apparent activation energy in the natural temperature range (0-15 degrees C) increased from similar to 50 to similar to 70 kJ mol(-1), corresponding to Q(10) values of similar to 2.0 and similar to 3.0, respectively. These changes indicated an adaptation of the aerobic population to seasonal temperature conditions. Due to the seasonal adaptation and to diffusive limitations, a relatively weak temperature dependence of the area-specific aerobic mineralisation rate in the sediment was calculated, Q(10)=1.8. Model calculations further demonstrated significant shifts in the relative importance of aerobic and anaerobic mineralisation due to seasonal temperature variation, with less importance of aerobic respiration and a larger fraction of benthic oxygen consumption coupled to the reoxidation of reduced inorganic compounds during summer than during winter. (C) 1998 Federation of European Microbiological Societies. Published by Elsevier Science B.V.

Details

show
hide
Language(s): eng - English
 Dates: 1998
 Publication Status: Published in print
 Pages: 12
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: FEMS Microbiology Ecology
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Amsterdam : Oxford University Press
Pages: - Volume / Issue: 25 (2) Sequence Number: - Start / End Page: 189 - 200 Identifier: ISSN: 0168-6496
CoNE: https://pure.mpg.de/cone/journals/resource/954925526820_1