Influence of Salinity on Distribution of Ammonia-Oxidizing Bacteria in Laohe Estuarine Wetland, China

Abstract:

Soil salinization in Laohe estuarine wetland is becoming more serious, thus the characteristics of AOB in different salt salinity have drawn more attention. Our study investigated the spatial and temporal distribution of ammonia-oxidizing bacteria (AOB) in different salinity soils in Laohe estuarine wetland. Results show that the largest amount of AOB appeared when salinity was 10g/kg, and decrease when salinity was higher (15g/kg, 20g/kg) or lower (2g/kg, 5g/kg). The distribution of AOB shows that the AOB amount is larger in surface layer (0-20cm) than middle layer (20-40cm) or the bottom layer (40-60cm); the AOB is more abundant in summer than autumn. Results indicate that salinity is a key factor on the AOB abundance, but not an influencer on the vertical and temporal distribution of AOB in estuarine wetland. Temperature and organic content are the related factors of the vertical distribution of AOB abundance, and the growth of reed is also an important influence factor on the variation of AOB during different seasons.

• Periodical: Advanced Materials Research (Volumes 726-731)
• Pages: 1332-1336
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.726-731.1332
• Online since: August 2013
• Authors: Yan Wang, Jie Bai, Yang Guo Zhao
• Keywords: Ammonia-Oxidizing Bacteria (AOB), Estuarine Wetland, Salinity, Spatial and Temporal Distribution

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