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Diatoms in peat – Dominant producers in a changing environment?
Responsible organisation
2009 (English)In: Soil Biology and Biochemistry, ISSN 0038-0717, E-ISSN 1879-3428, Vol. 41, no 8, p. 1764-1766Article in journal (Refereed) Published
Abstract [en]

Changes in hydrology and temperature can induce rapid changes in boreal wetland ecosystems. Factors such as hydrosere, permafrost, climate and human interference may disturb the prevailing mire vegetation, whereby a new dominant assemblage can develop. At the transition from one vegetation type to another, the old vegetation may be suppressed, die out or start to decay, and some time may pass until a new mire vegetation is fully established. Here, we demonstrate that diatoms may thrive during such transitions, creating isolated and shallow peat layers with significantly elevated biogenic silica content. Biogenic silica and other nutrients that would otherwise be lost during mineralization in runoff are in this way retained in the ecosystem. Our results imply that silica storage originating from diatoms can be expected to increase in today’s rapidly changing boreal wetlands. The impacts on transport of Si through boreal watersheds are currently unknown.

Place, publisher, year, edition, pages
2009. Vol. 41, no 8, p. 1764-1766
Keywords [en]
Diatoms, Boreal wetlands, Dominant producers, Silica cycling, Climate and environmental change
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:polar:diva-8090DOI: 10.1016/j.soilbio.2009.05.012OAI: oai:DiVA.org:polar-8090DiVA, id: diva2:1288077
Available from: 2019-02-12 Created: 2019-02-12 Last updated: 2019-02-12

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