sludge 12 anthropogenic 12 terrestrial 10 aquatic 7 lentic 7 benthic 5 sediment 5 anaerobic 4 littoral 4 medium temperature 4 wetland 4 brackish water 3 paludal 3 soil 3 medium salinity 3 lacustrine 2 low salinity 2 fresh water 2 contaminated 2 high salinity 1 mangrove 1 marine 1 very low temperature 1 plant host 1 rhizosphere 1 saline water 1 host-associated 1