Impact of ocean acidification on benthic and water column ammonia oxidation

Kitidis, V, Laverock, B, Mcneill, L, Beesley, A, Cummings, D, Tait, K, Osborn, A and Widdicombe, S 2011, 'Impact of ocean acidification on benthic and water column ammonia oxidation', Geophysical Research Letters, vol. 38, no. 21, L21603, pp. 1-5.


Document type: Journal Article
Collection: Journal Articles

Title Impact of ocean acidification on benthic and water column ammonia oxidation
Author(s) Kitidis, V
Laverock, B
Mcneill, L
Beesley, A
Cummings, D
Tait, K
Osborn, A
Widdicombe, S
Year 2011
Journal name Geophysical Research Letters
Volume number 38
Issue number 21
Article Number L21603
Start page 1
End page 5
Total pages 5
Publisher Wiley-Blackwell Publishing
Abstract Ammonia oxidation is a key microbial process within the marine N-cycle. Sediment and water column samples from two contrasting sites in the English Channel (mud and sand) were incubated (up to 14 weeks) in CO2-acidified seawater ranging from pH 8.0 to pH 6.1. Additional observations were made off the island of Ischia (Mediterranean Sea), a natural analogue site, where long-term thermogenic CO2 ebullition occurs (from pH 8.2 to pH 7.6). Water column ammonia oxidation rates in English Channel samples decreased under low pH with near-complete inhibition at pH 6.5. Water column Ischia samples showed a similar though not statistically significant trend. However, sediment ammonia oxidation rates at all three locations were not affected by reduced pH. These observations may be explained by buffering within sediments or low-pH adaptation of the microbial ammonia oxidizing communities. Our observations have implications for modeling the future impact of ocean acidification on marine ecosystems.
Subject Environmental Sciences not elsewhere classified
Environmental Science and Management not elsewhere classified
Keyword(s) Ammonia oxidation
English channel
Marine ecosystem
Mediterranean sea
Microbial process
Water columns
DOI - identifier 10.1029/2011GL049095
Copyright notice © 2011 by the American Geophysical Union
ISSN 0094-8276
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