Table 1.

Sampling locations, sampling dates, and estimated maximum initial methane oxidation rates of Lake Constance sediment incubations

Habitat (depth)AbbreviationSampling date (day.mo.yr)Maximum initial methane oxidation rateb
No additionNitrateAmbient air
Profundal (ca. 80 m)prof117.02.2009NAa3.627
Profundal (ca. 80 m)prof206.10.2009NA2.738
Profundal (ca. 120 m)prof309.02.2010NA1.844
Littoral (2-3 m)litt116.11.2009NANA18
Littoral (2-3 m)litt214.01.20100.080.663
  • a NA, rates were not calculated if the 14CO2 formation was within the background scatter of the values at time zero and values for sterile controls. With sulfate as electron acceptor, the 14CO2 formation was within the background scatter in all experiments.

  • b With the given electron acceptors, in nmol d−1 (ml sediment)−1.