Links between bacteria derived from penguin guts and deposited guano and the surrounding soil microbiota

Yew, Wen Chyin and Pearce, David Anthony and Dunn, Michael James and Adlard, Stacey and Alias, Siti Aisah and Samah, Azizan Abu and Convey, Peter (2018) Links between bacteria derived from penguin guts and deposited guano and the surrounding soil microbiota. Polar Biology, 41 (2). pp. 269-281. ISSN 0722-4060

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Official URL: https://doi.org/10.1007/s00300-017-2189-x

Abstract

Penguins are an important indicator of marine ecosystem health and a major contributor of nutrients to terrestrial ecosystems in Antarctica. Their stomach microbiota is influenced by both the prey consumed and their foraging environment in the sea. As penguins feed at sea and breed on land, they might be expected to transfer microbes (e.g. prey-associated and marine bacteria) as well as nutrients from their stomachs while regurgitating food or in their guano to the surrounding terrestrial environment. However, most research attention to date has focused separately on the penguin gut microbiota (via cloacal/guano samples) and the terrestrial soil microbiota, and any relationship between them has yet to be established. Here, we analysed the bacterial communities in stomach regurgitates and cloacal swabs from the same individual birds, freshly deposited guano and rookery soils of two Pygoscelis penguins that breed sympatrically on Signy Island (South Orkney Islands, maritime Antarctic) using a high-throughput DNA sequencing method. Our data do not support the hypothesis that bacteria transferred from penguin guts and/or deposited guano make a significant contribution to the communities of the surrounding terrestrial microbial ecosystem. In both penguin species, composition of bacterial communities differed between the four sample types, with Jaccard similarities ranging between 10 and 36%. Assemblages of the dominant and co-occurring bacterial communities in rookery soils were either significantly negatively correlated or not correlated with the three other sample types. Sample-specific communities were also identified in this study, contributing around 63% of the identified diversity overall.

Item Type: Article
Uncontrolled Keywords: Antarctic; Bacterial input; Microbial diversity; Terrestrial environment
Subjects: Q Science > Q Science (General)
Divisions: Faculty of Science
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 12 Feb 2019 08:23
Last Modified: 12 Feb 2019 08:23
URI: http://eprints.um.edu.my/id/eprint/20272

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