caa a22 4500 469077719 CHVBK 20180323132939.0 cr unu---uuuuu 170328e19920101xx s 000 0 eng 10.1007/BF00196867 doi (NATIONALLICENCE)springer-10.1007/BF00196867 Dormant bacteria in lake sediments as palaeoecological indicators [Elektronische Daten] [Ingemar Renberg, Mats Nilsson] Lake sediments contain viable allochthonous bacteria that can be cultured and used for palaeoecological studies. To be a good palaeoindicator, a bacterium must be able to survive in sediments for long periods of time, but also be unable to reproduce in the lake bottom. Bacteria can survive the unfavourable environmental conditions in lake sediments as resting cells. The endospore is the most specialized form and gives the bacterium an extreme longevity. The oldest viable endospores isolated from lake sediments that we are aware of are about 9000 years old. Several species, mainly in the genera Thermoactinomyces, Bacillus and Clostridium, form endospores. Clostridium perfringens has been used as palaeoindicator for sewage pollution, while Thermoactinomyces vulgaris is an indicator for past agricultural activity in the boreal forest zone and a potential climatic indicator in other vegetation zones. Although isolation and enumeration of bacterial endospores from lake sediments is rather easy and has considerable potential as a powerful tool in palaeoecology, the number of studies using palaeoecological approaches is limited. Kluwer Academic Publishers, 1992 bacteria nationallicence dormancy nationallicence longevity nationallicence sediment nationallicence spores nationallicence palaeoecology nationallicence palaeolimnology nationallicence Renberg Ingemar Department of Ecological Botany, University of Umeå, S-901 87, Umeå, Sweden aut Nilsson Mats Department of Forest Site Research, Swedish University of Agricultural Sciences, S-901 83, Umeå, Sweden aut Journal of Paleolimnology Kluwer Academic Publishers 7/2(1992-01-01), 127-135 0921-2728 7:2<127 1992 7 10933 https://doi.org/10.1007/BF00196867 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00196867 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Renberg Ingemar Department of Ecological Botany, University of Umeå, S-901 87, Umeå, Sweden aut NATIONALLICENCE 700 1- Nilsson Mats Department of Forest Site Research, Swedish University of Agricultural Sciences, S-901 83, Umeå, Sweden aut NATIONALLICENCE 773 0- Journal of Paleolimnology Kluwer Academic Publishers 7/2(1992-01-01), 127-135 0921-2728 7:2<127 1992 7 10933 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer