Heavy Metal Pollution Structures Soil Bacterial Co

Authors: Jennifer Mesa Enrique MateosNaranjo Eloísa Pajuelo Miguel Ángel Caviedes Ignacio David RodríguezLlorente

Publish Date: 2016/11/26

Volume: 227, Issue: 12, Pages: 466-

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Abstract

Soil bacterial community dynamics was assessed in some of the most polluted estuaries by heavy metals of the world The influence of seasons heavy metal pollution and Spartina maritima rhizosphere throughout an entire year were compared in Tinto Odiel and Piedras salt marshes from Huelva Spain The less contaminated estuary showed the highest bacterial biodiversity especially in rhizosphere which was deeply affected by seasonal changes On the contrary bacterial diversity in the most polluted salt marsh was lower and neither plant roots nor seasons had a marked effect on their annual dynamics This work provided evidence that soil bacterial communities in south western Spain estuarine sediments were not completely related to the plant species they inhabit with but to environmental conditions prioritizing pollution levels These results may be considered for conducting planned restoration strategies using native plant growth promoting rhizobacteria together with heavy metal hyperaccumulator S maritima to preserve these endangered ecosystemsThis work was supported by the Junta de Andalucía Spain P11RNM7274MO the Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria INIA Spain RTA201200006C0303 and the Ministerio de Educación Cultura y Deporte Spain FPU grant number AP20121809 to JM Authors are grateful to ResBioAgro company Seville Spain and S NavarroTorre for technical support and Dr F Balao for statistical analysis assistance Authors also gratefully acknowledge the anonymous reviewer who substantially improved the earlier draft of this manuscript with valuable and constructive comments

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