Bacterial activity associated with the decomposition of woody substrates in a stream sediment.

Abstract:

:Ground bark and heartwood from Alnus rubra and Pseudotsuga menziesii were added to a muddy sediment from a small Oregon stream and incubated in situ. Carbon dioxide and methane production rates were increased by all amendments, the biggest increase being shown with A. rubra wood. Except for sediment amended with A. rubra wood, nitrogen fixation rates from all treatments (including the control) were approximately 0.1 nmol/g per h throughout the 6-month study period. Contrary to expectations, neither bark had a noticeable adverse effect on microbial activity, but the A. rubra wood promoted nitrogen fixation. These results help to explain the faster rate of decomposition of A. rubra wood in water compared with that of P. menziesii described in the literature. The uptake kinetics of glucose (V(max)) did not follow the same pattern as gas evolution.

journal_name

Appl Environ Microbiol

authors

Baker JH,Morita RY,Anderson NH

doi

10.1128/AEM.45.2.516-521.1983

keywords:

subject

Has Abstract

pub_date

1983-02-01 00:00:00

pages

516-21

issue

2

eissn

0099-2240

issn

1098-5336

journal_volume

45

pub_type

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