Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2017 Sep 26;12(1):87–100. doi: 10.1038/ismej.2017.146

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

Copyright © 2018 The Author(s)

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/4.0/

PMC Copyright notice

(a) Conceptual cross-section of the Sulzbrunn spring cavern and its water flows (not to scale). Inset images: (b) Collecting natural gas seeping from the spring pool in an inverted glass bottle using a funnel. (c) Natural bedrock and the emptied spring pool during biofilm and mineral spring water sampling. (d) The filled spring pool with surrounding natural bedrock and man-made gallery covered with biofilms. (e) The three distinct biofilm compartments sampled in this study: submersed and subaerial wall biofilms, snottites at the ceiling. (f) Close-up of thick, slimy snottites. (g) Close-up of subaerial biofilms at upper wall and ceiling. (h) Close-up of submersed wall biofilms.