Articles | Volume 16, issue 20
https://doi.org/10.5194/bg-16-3959-2019
https://doi.org/10.5194/bg-16-3959-2019
Research article
 | 
15 Oct 2019
Research article |  | 15 Oct 2019

Hypoxia in mangroves: occurrence and impact on valuable tropical fish habitat

Alexia Dubuc, Ronald Baker, Cyril Marchand, Nathan J. Waltham, and Marcus Sheaves

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Cited articles

Alongi, D. M., Sasekumar, A., Chong, V. C., Pfitzner, J., Trott, L. A., Tirendi, F., Dixon, P., and Brunskill, G. J.: Sediment accumulation and organic material flux in a managed mangrove ecosystem: estimates of land–ocean–atmosphere exchange in peninsular Malaysia, Mar. Geol., 208, 383–402, 2004. 
Baker, R., Sheaves, M., and Johnston, R.: Geographic variation in mangrove flooding and accessibility for fishes and nektonic crustaceans, Hydrobiologia, 762, 1–14, 2015. 
Becker, A., Coppinger, C., and Whitfield, A. K.: Influence of tides on assemblages and behaviour of fishes associated with shallow seagrass edges and bare sand, Mar. Ecol. Prog. Ser., 456, 187–199, 2012. 
Bouillon, S., Middelburg, J. J., Dehairs, F., Borges, A. V., Abril, G., Flindt, M. R., Ulomi, S., and Kristensen, E.: Importance of intertidal sediment processes and porewater exchange on the water column biogeochemistry in a pristine mangrove creek (Ras Dege, Tanzania), Biogeosciences, 4, 311–322, https://doi.org/10.5194/bg-4-311-2007, 2007. 
Bradley, M., Baker, R., Nagelkerken, I., and Sheaves, M.: Context is more important than habitat type in determining use by juvenile fish, Landsc. Ecol. Eng., 34, 427–442, 2019. 
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Short summary
Little is known about how hypoxia influences mangrove fish assemblages. In situ video observations reveal species-specific avoidance strategies in response to developing hypoxia in a mangrove forest. Taxa commonly using mangroves could withstand hypoxia, while others usually associated with reef habitats were not recorded below 70 % saturation. These results suggest that hypoxia is an important factor shaping mangrove fish assemblages and could explain the low species richness usually observed.
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