ISSN:
1573-1596
Keywords:
adaptation and self-regulation of ecosystems
;
charcoal
;
diatoms
;
Estonia
;
natural disturbances
;
palaeoecology
;
pollen analysis
Source:
Springer Online Journal Archives 1860-2000
Topics:
Energy, Environment Protection, Nuclear Power Engineering
,
Geography
Notes:
Abstract The study focused on the problem of the response and adaptation of an ecosystem to natural fire in case of greenhouse warming. The palaeoecological approach was used and reconstructions were made for time ca 6000 years ago, when the human impact in the studied area was absent or very weak and the summer temperatures were about 2.4 degrees higher than at the present time. The palaeoreconstructions were compiled using the charcoal, pollen and diatoms data from the sediments of a northeast Estonian lake. The results show that forest fires influenced the biota of the lake mainly through evapotranspiration and the accompanying erosional changes. The impacts of the fire directly to the lake ecosystem were short-term and the primary diatom association was restored after 10–15 years. The pollen influx was influenced by the fires mainly through the changes in the openness of the landscape and the composition of the pollen spectra was restored over a period of 50–60 years. The data demonstrate the high ability of the studied ecosystem to adapt to the impact of natural fires in the climatic environment comparable with that predicted for the future.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/B:MITI.0000004662.80181.80
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