Meiofauna increases bacterial denitrification in marine sediments
(2014) In Nature Communications 5.- Abstract
- Denitrification is a critical process that can alleviate the effects of excessive nitrogen availability in aquatic ecosystems subject to eutrophication. An important part of denitrification occurs in benthic systems where bioturbation by meiofauna (invertebrates <1mm) and its effect on element cycling are still not well understood. Here we study the quantitative impact of meiofauna populations of different abundance and diversity, in the presence and absence of macrofauna, on nitrate reduction, carbon mineralization and methane fluxes. In sediments with abundant and diverse meiofauna, denitrification is double that in sediments with low meiofauna, suggesting that meiofauna bioturbation has a stimulating effect on nitrifying and... (More)
- Denitrification is a critical process that can alleviate the effects of excessive nitrogen availability in aquatic ecosystems subject to eutrophication. An important part of denitrification occurs in benthic systems where bioturbation by meiofauna (invertebrates <1mm) and its effect on element cycling are still not well understood. Here we study the quantitative impact of meiofauna populations of different abundance and diversity, in the presence and absence of macrofauna, on nitrate reduction, carbon mineralization and methane fluxes. In sediments with abundant and diverse meiofauna, denitrification is double that in sediments with low meiofauna, suggesting that meiofauna bioturbation has a stimulating effect on nitrifying and denitrifying bacteria. However, high meiofauna densities in the presence of bivalves do not stimulate denitrification, while dissimilatory nitrate reduction to ammonium rate and methane efflux are significantly enhanced. We demonstrate that the ecological interactions between meio-, macrofauna and bacteria are important in regulating nitrogen cycling in soft-sediment ecosystems. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/8522767
- author
- Bonaglia, Stefano LU ; Nascimento, F. J. A. ; Bartoli, M. ; Klawonn, I. and Bruchert, V.
- publishing date
- 2014
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Nature Communications
- volume
- 5
- article number
- 5133
- publisher
- Nature Publishing Group
- external identifiers
-
- wos:000343980300007
- scopus:84928685471
- ISSN
- 2041-1723
- DOI
- 10.1038/ncomms6133
- language
- English
- LU publication?
- no
- id
- 169065d3-a1bd-4e44-b4bb-25b882f87902 (old id 8522767)
- date added to LUP
- 2016-04-01 12:55:21
- date last changed
- 2022-04-13 22:06:28
@article{169065d3-a1bd-4e44-b4bb-25b882f87902, abstract = {{Denitrification is a critical process that can alleviate the effects of excessive nitrogen availability in aquatic ecosystems subject to eutrophication. An important part of denitrification occurs in benthic systems where bioturbation by meiofauna (invertebrates <1mm) and its effect on element cycling are still not well understood. Here we study the quantitative impact of meiofauna populations of different abundance and diversity, in the presence and absence of macrofauna, on nitrate reduction, carbon mineralization and methane fluxes. In sediments with abundant and diverse meiofauna, denitrification is double that in sediments with low meiofauna, suggesting that meiofauna bioturbation has a stimulating effect on nitrifying and denitrifying bacteria. However, high meiofauna densities in the presence of bivalves do not stimulate denitrification, while dissimilatory nitrate reduction to ammonium rate and methane efflux are significantly enhanced. We demonstrate that the ecological interactions between meio-, macrofauna and bacteria are important in regulating nitrogen cycling in soft-sediment ecosystems.}}, author = {{Bonaglia, Stefano and Nascimento, F. J. A. and Bartoli, M. and Klawonn, I. and Bruchert, V.}}, issn = {{2041-1723}}, language = {{eng}}, publisher = {{Nature Publishing Group}}, series = {{Nature Communications}}, title = {{Meiofauna increases bacterial denitrification in marine sediments}}, url = {{http://dx.doi.org/10.1038/ncomms6133}}, doi = {{10.1038/ncomms6133}}, volume = {{5}}, year = {{2014}}, }