Université de Neuchâtel

Contrasted effects of increased N and CO2 supply on two keystone species in peatland restoration and implications for global change

Mitchell, Edward A. D. ; Buttler, Alexandre ; Grosvernier, Philippe ; Rydin, HÅkan ; Siegenthaler, Andy ; Gobat, Jean-Michel

In: Journal of Ecology, 2002, vol. 90, no. 3, p. 529-533

1 Significant areas of temperate bogs have been damaged by peat harvesting but may regenerate. These secondary mires, if well managed, may act as strong C sinks, regulate hydrology and buffer regional climate. 2 The potential effects of bog regeneration will, however, depend on the successful establishment of the principal peat formers –Sphagnum mosses. The influence...

Université de Neuchâtel

Cut-over peatland regeneration assessment using organic matter and microbial indicators (bacteria and testate amoebae)

Laggoun-Défarge, Fatima ; Mitchell, Edward A. D. ; Gilbert, Daniel ; Disnar, Jean-Robert ; Comont, Laure ; Warner, Barry G. ; Buttler, Alexandre

In: Journal of Applied Ecology, 2007, vol. 45, no. 2, p. 716-727

1. Cut-over peatlands cover large surfaces of high potential value for enhancing biodiversity and carbon sequestration if successfully restored. Unfortunately, evaluation of restoration success is not straightforward. We assessed the bioindicator value of organic matter (OM), testate amoebae (protozoa) and bacteria in peat from two regeneration stages and a reference site of a cut-over...

Université de Neuchâtel

Ecology of testate amoebae (Protista) in south-central Alaska peatlands: building transfer-function models for palaeoenvironmental studies

Payne, Richard J. ; Kishaba, Keiko ; Blackford, Jeff J. ; Mitchell, Edward A. D.

In: The Holocene, 2006, vol. 16, no. 3, p. 403-414

Testate amoebae are valuable indicators of peatland hydrology and have been used in many palaeoclimatic studies in peatlands. Because the species' ecological optima may vary around the globe, the development of transfer function models is an essential prerequisite for regional palaeoclimatic studies using testate amoebae. We investigated testate amoebae ecology in nine peatlands covering a 250-km...

Université de Neuchâtel

Evolution des points d’eau dans la tourbière du cachot (Jura neuchâtelois) : 2. Les creuses de pied de murs = Evolution of the waterholes in the peat bog of Le Cachot (Swiss Jura mountains). 2. Ponds in peat cutting pits.

Matthey, Willy

In: Bulletin de la Société Neuchâteloise des Sciences naturelles, 2000, vol. 123, p. 65

These waterholes are situated at the periphery of the peat bog. They have been studied in detail in 1969. A new survey has been made in 1999, that has showed some changes caused by two factors: • The filling of the pits by fallen peat cutting faces. • The invasion of the ponds by Carex rostrata and Sphagnum spp. The growing of the birch - and pine trees over the exploited peat...