期刊
MIRES AND PEAT
卷 24, 期 -, 页码 -出版社
INT PEAT SOC
DOI: 10.19189/MaP.2018.OMB.363
关键词
biodiversity; ecosystem stability; long-term vegetation studies; percolation mire; rich fen
资金
- Polish Ministry of Science and Higher Education [N304 010 31/0414]
- Polish-Norwegian Research Programme [Pol-Nor/199522/86/2013]
Little is known about the vegetation dynamics of fens, and especially of hydrologically undisturbed examples. We described the vegetation of an undisturbed mesotrophic rich fen (percolation mire) in 2006-2008 and 2016 and compared our results with vegetation records from the 1980s to identify any longer-term changes. Eight vegetation types were distinguished. On the whole, the vegetation of the mire has remained very stable throughout the last 30 years. However, detailed comparisons of permanent plots recorded twice in the last ten years indicated an expansion of shrubs in patches of Sphagnum - small sedge vegetation. There were also several less prominent changes in the abundance of particular species in other mire vegetation types: (1) an increase of sedges, reeds and Calhergonella cuspidata at the expense of rich-fen moss species in communities of brown moss - small sedge; (2) a change in composition of the moss layer in pine - birch fen woodland; (3) an increase of reedbed species and reduced Alnus gluhnosa abundance in flooded riparian alder woodland; and (4) a decline of wetland herbs and mosses in alder spring fen woodland at the edges of the valley.
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