Premium
The effects of short‐term inundation on carbon dynamics, microbial community structure and microbial activity in floodplain soil
Author(s) -
Wilson J. S.,
Baldwin D. S.,
Rees G. N.,
Wilson B. P.
Publication year - 2011
Publication title -
river research and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.679
H-Index - 94
eISSN - 1535-1467
pISSN - 1535-1459
DOI - 10.1002/rra.1352
Subject(s) - mesocosm , floodplain , environmental science , microbial population biology , soil respiration , flooding (psychology) , community structure , soil carbon , carbon cycle , soil water , ecology , environmental chemistry , soil science , ecosystem , chemistry , biology , psychology , genetics , bacteria , psychotherapist
A mesocosm study was carried out to determine whether flooding affected soil microbial structure and function. Over a 24 day period soils were either flooded or remained dry and changes in the microbial community structure, microbial metabolic activity (determined by looking at soil respiration rates and exo‐enzyme activity), community level physiological profiles and soil carbon speciation were examined. Flooding induced significant changes in the microbial community structure and increased soil respiration and enzymatic degradation rates. Shifts occurred in carbon speciation after flooding and increases in ‘labile’ carbon fractions were observed. The duration of flooding was also important for carbon dynamics and microbial community structure. Based on the results of the mesocosm experiment a conceptual model of floodplain soils response to flooding over time was formulated. The findings of this mesocosm study illustrate the importance of flooding to floodplain soil functioning. Copyright © 2010 John Wiley & Sons, Ltd.