1. Researcher, Univ. of Innsbruck, Institute of Microbiology, Technikerstraße 25d, 6020 Innsbruck, Austria (corresponding author).
2. M.S. Student, Univ. of Innsbruck, Institute of Microbiology, Technikerstraße 25d, 6020 Innsbruck, Austria.
3. Researcher, Univ. of Innsbruck, Institute of Microbiology, Technikerstraße 25d, 6020 Innsbruck, Austria.
4. Private Lecturer, BIO4GAS GmbH, Technikerstraße 25d, 6020 Innsbruck, Austria.
5. Professor, Univ. of Innsbruck, Institute of Microbiology, Technikerstraße 25d, 6020 Innsbruck, Austria; and BIO4GAS GmbH, Technikerstraße 25d, 6020 Innsbruck, Austria.
6. Researcher, Centro de Edafología y Biología Aplicada del Segura, Campus Universitario de Espinardo, Espinardo, 30100 Murcia, Spain; and Univ. of Innsbruck, Institute of Microbiology, Technikerstraße 25d, 6020 Innsbruck, Austria.