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Title: Modified niche optima and breadths explain the historical contingency of bacterial community responses to eutrophication in coastal sediments

Abstract

Abstract Previous studies have shown that the response of bacterial communities to disturbances depends on their environmental history. Historically fluctuating habitats host communities that respond better to disturbance than communities of historically stable habitats. However, the exact ecological mechanism that drives this dependency remains unknown. Here, we experimentally demonstrate that modifications of niche optima and niche breadths of the community members are driving this dependency of bacterial responses to past environmental conditions. First, we develop a novel, simple method to calculate the niche optima and breadths of bacterial taxa regarding single environmental gradients. Then, we test this method on sediment bacterial communities of three habitats, one historically stable and less loaded and two historically more variable and more loaded habitats in terms of historical chlorophyll‐α water concentration, that we subject to hypoxia via organic matter addition ex situ . We find that communities containing bacterial taxa differently adapted to hypoxia show different structural and functional responses, depending on the sediment's environmental history. Specifically, in the historically less fluctuating and loaded sediments where we find more taxa poorly adapted to hypoxic conditions, communities change a lot over time and organic matter is not degraded efficiently. The opposite is true for themore » historically more fluctuating and loaded sediments where we find more taxa well adapted to hypoxia. Based on the community responses observed here, we also propose an alternative calculation of community resistance that takes into account how rapidly the communities respond to disturbances and not just the initial and final states of the community.« less

Authors:
 [1];  [2];  [3];  [3];  [3];  [4];  [4];  [3];  [3]
  1. Biological and Environmental Sciences and Engineering Department King Abdullah University of Science and Technology (KAUST) Thuwal 23955‐6900 Saudi Arabia, Department of Biology University of Crete Voutes University Campus 70013 Heraklion Crete Greece
  2. School of Biological and Chemical Sciences Queen Mary University of London Mile End Road London E1 4NS UK
  3. Department of Biology University of Crete Voutes University Campus 70013 Heraklion Crete Greece
  4. Biological and Environmental Sciences and Engineering Department King Abdullah University of Science and Technology (KAUST) Thuwal 23955‐6900 Saudi Arabia
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1328803
Alternate Identifier(s):
OSTI ID: 1328804
Grant/Contract Number:  
DE‐AC02‐05CH11231; AC02-05CH11231
Resource Type:
Journal Article: Published Article
Journal Name:
Molecular Ecology
Additional Journal Information:
Journal Name: Molecular Ecology Journal Volume: 26 Journal Issue: 7; Journal ID: ISSN 0962-1083
Publisher:
Wiley-Blackwell
Country of Publication:
United Kingdom
Language:
English

Citation Formats

Fodelianakis, S., Moustakas, A., Papageorgiou, N., Manoli, O., Tsikopoulou, I., Michoud, G., Daffonchio, D., Karakassis, I., and Ladoukakis, E. D. Modified niche optima and breadths explain the historical contingency of bacterial community responses to eutrophication in coastal sediments. United Kingdom: N. p., 2016. Web. doi:10.1111/mec.13842.
Fodelianakis, S., Moustakas, A., Papageorgiou, N., Manoli, O., Tsikopoulou, I., Michoud, G., Daffonchio, D., Karakassis, I., & Ladoukakis, E. D. Modified niche optima and breadths explain the historical contingency of bacterial community responses to eutrophication in coastal sediments. United Kingdom. https://doi.org/10.1111/mec.13842
Fodelianakis, S., Moustakas, A., Papageorgiou, N., Manoli, O., Tsikopoulou, I., Michoud, G., Daffonchio, D., Karakassis, I., and Ladoukakis, E. D. 2016. "Modified niche optima and breadths explain the historical contingency of bacterial community responses to eutrophication in coastal sediments". United Kingdom. https://doi.org/10.1111/mec.13842.
@article{osti_1328803,
title = {Modified niche optima and breadths explain the historical contingency of bacterial community responses to eutrophication in coastal sediments},
author = {Fodelianakis, S. and Moustakas, A. and Papageorgiou, N. and Manoli, O. and Tsikopoulou, I. and Michoud, G. and Daffonchio, D. and Karakassis, I. and Ladoukakis, E. D.},
abstractNote = {Abstract Previous studies have shown that the response of bacterial communities to disturbances depends on their environmental history. Historically fluctuating habitats host communities that respond better to disturbance than communities of historically stable habitats. However, the exact ecological mechanism that drives this dependency remains unknown. Here, we experimentally demonstrate that modifications of niche optima and niche breadths of the community members are driving this dependency of bacterial responses to past environmental conditions. First, we develop a novel, simple method to calculate the niche optima and breadths of bacterial taxa regarding single environmental gradients. Then, we test this method on sediment bacterial communities of three habitats, one historically stable and less loaded and two historically more variable and more loaded habitats in terms of historical chlorophyll‐α water concentration, that we subject to hypoxia via organic matter addition ex situ . We find that communities containing bacterial taxa differently adapted to hypoxia show different structural and functional responses, depending on the sediment's environmental history. Specifically, in the historically less fluctuating and loaded sediments where we find more taxa poorly adapted to hypoxic conditions, communities change a lot over time and organic matter is not degraded efficiently. The opposite is true for the historically more fluctuating and loaded sediments where we find more taxa well adapted to hypoxia. Based on the community responses observed here, we also propose an alternative calculation of community resistance that takes into account how rapidly the communities respond to disturbances and not just the initial and final states of the community.},
doi = {10.1111/mec.13842},
url = {https://www.osti.gov/biblio/1328803}, journal = {Molecular Ecology},
issn = {0962-1083},
number = 7,
volume = 26,
place = {United Kingdom},
year = {Fri Oct 07 00:00:00 EDT 2016},
month = {Fri Oct 07 00:00:00 EDT 2016}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at https://doi.org/10.1111/mec.13842

Citation Metrics:
Cited by: 13 works
Citation information provided by
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