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Diatoms in peat : dominant producers in a changing environment?

Kokfelt, Ulla LU ; Struyf, Eric LU and Randsalu Wendrup, Linda LU (2009) In Soil Biology and Biochemistry 41(8). p.1764-1766
Abstract
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... (More)
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. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Climate and environmental change, Silica cycling, Dominant producers, Diatoms, Boreal wetlands
in
Soil Biology and Biochemistry
volume
41
issue
8
pages
1764 - 1766
publisher
Elsevier
external identifiers
  • WOS:000268920400025
  • Scopus:67650084382
ISSN
0038-0717
DOI
10.1016/j.soilbio.2009.05.012
project
Climate Initiative
language
English
LU publication?
yes
id
1ca9250c-d9e0-41c8-a457-4823fbd75037 (old id 1444549)
date added to LUP
2009-12-14 14:36:36
date last changed
2016-11-14 14:55:03
@misc{1ca9250c-d9e0-41c8-a457-4823fbd75037,
  abstract     = {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.},
  author       = {Kokfelt, Ulla and Struyf, Eric and Randsalu Wendrup, Linda},
  issn         = {0038-0717},
  keyword      = {Climate and environmental change,Silica cycling,Dominant producers,Diatoms,Boreal wetlands},
  language     = {eng},
  number       = {8},
  pages        = {1764--1766},
  publisher    = {ARRAY(0x7a43a90)},
  series       = {Soil Biology and Biochemistry},
  title        = {Diatoms in peat : dominant producers in a changing environment?},
  url          = {http://dx.doi.org/10.1016/j.soilbio.2009.05.012},
  volume       = {41},
  year         = {2009},
}