Hotes, Stefan and Poschlod, Peter and Takahashi, H. and Grootjans, A. P. and Adema, E. (2004) Effects of tephra deposition on mire vegetation: a field experiment in Hokkaido, Japan. JOURNAL OF ECOLOGY, 92 (4). pp. 624-634. ISSN 0022-0477,
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1 The influence of tephra (aerially transported volcanic ejecta) on mire vegetation was investigated in a field experiment at Sarobetsu Mire, northern Hokkaido, Japan, which simulated relatively thin, widespread tephras. It was carried out in the centre of a raised part of the mire in a Carex middendorffii-Sphagnum papillosum community. 2 We tested the effects of varying tephra layer thickness, grain size and season of the simulated tephra impact. 3 Vegetation surveys and analyses of the mire pore water were carried out before and 1 and 2 years after tephra application. Redox potential, oxygen saturation and sulphide concentration were measured in the surface layer of selected plots after 10 months. 4 Pore water chemistry and oxygen saturation changed significantly in some treatments. Some plant species disappeared from certain treatments after tephra application, but the majority survived. Colonization by non-mire species played a significant role in only one treatment. Mosses were more strongly affected by the disturbance than vascular plants. 5 Tephra had stronger effects on the vegetation when layers were thicker, were more fine-grained and when applied at the beginning rather than at the end of the growing season. 6 Moderate tephra deposition is unlikely to cause long-term changes in mire development. Subsequent succession depends on properties of the tephra, on the vegetation type (e.g. life-forms) and on the season, but the original vegetation will probably recover even where the moss layer is severely damaged, as Sphagnum spp. can re-establish by growing through tephra at least up to 6 cm thick.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MOUNT ST-HELENS; WETLAND DEVELOPMENT; SUCCESSION; NORTHERN; HOLOCENE; ERUPTION; HISTORY; FENS; BOG; ASH; disturbance; field experiment; Japan; mire; succession; tephra; vegetation; volcanic impact; water chemistry |
| Subjects: | 500 Science > 580 Botanical sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Pflanzenwissenschaften > Lehrstuhl für Ökologie und Naturschutzbiologie (Prof. Dr. Peter Poschlod) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 05 Jul 2021 12:26 |
| Last Modified: | 05 Jul 2021 12:26 |
| URI: | https://pred.uni-regensburg.de/id/eprint/37400 |
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