Abstract：
:It is well established that in ombrotrophic bogs, water-table depth (WTD) is the primary environmental control on testate amoeba distribution. However, the environmental controls on testate amoebae in minerotrophic fens are less well known and successional change in their assemblages associated with fen-bog peatland development has been scarcely investigated. Here we investigate a peatland space-for-time sequence resulting from postglacial rebound on the west coast of Finland, to assess successional patterns in testate amoeba communities and their relationships with environmental variables during peatland development. Sample sites along a 10-km transect from coast to inland ranged from a recently emerged wet meadow to a mature bog. Environmental variables (e.g., peat thickness, carbon and nitrogen content, pH, WTD and vegetation) were measured alongside testate amoeba samples. Results showed that even though the distribution of testate amoebae was to some extent determined by the succession stage, many taxa had wide WTD and pH ranges. The primary environmental control for many taxa changed along the succession. In conclusion, the ecological constraints on testate amoebae in minerotrophic systems are more complex than in bogs. The detected patterns also complicate the use of testate amoebae as a primary proxy in palaeoecological reconstructions where fen-to-bog shifts occur.
journal_name
Eur J Protistoljournal_title
European journal of protistologyauthors
Zhang H,Väliranta M,Amesbury MJ,Charman DJ,Laine A,Tuittila ESdoi
10.1016/j.ejop.2018.07.003subject
Has Abstractpub_date
2018-10-01 00:00:00pages
36-47eissn
0932-4739issn
1618-0429pii
S0932-4739(18)30059-2journal_volume
66pub_type
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journal_title：European journal of protistology
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