The dynamics of sphagnum in forest and peatland communities in southeastern

ABSTRACT. Long fire rotation, high levels of precipitation, and acidic nature of the bedrock are factors contributing to the dominance of Sphagnum in many upland and peatland communities in southeastern Labrador. Vegetation development induced by local or regional environmental change fre-quently in...

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Bibliographic Details
Main Author: David R. Foster
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Published: 1984
Subjects:
Mots clés
Sphagnum
croissance de la végétation
incendie
Labrador
formulation de paluds
succession
bryophytes
Arctic
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.539.9011
http://pubs.aina.ucalgary.ca/arctic/arctic37-2-133.pdf
Description
Summary:ABSTRACT. Long fire rotation, high levels of precipitation, and acidic nature of the bedrock are factors contributing to the dominance of Sphagnum in many upland and peatland communities in southeastern Labrador. Vegetation development induced by local or regional environmental change fre-quently involves replacement of species assemblages of various bryophytes and lichens by species assemblages dominated by Sphagnum. In upland forests the successional sequence following fire often culminates in a carpet of Sphagnum girgensohnii overgrowing feather mosses. Similarly, following a change in the water table, Sphagnum lindbergii encroaches as a broad carpet over Cladopdiella fruituns and Gymnocoleu infraru on recently exposed mud bottoms in bog hollows. On bog hummocks, following fire or changes in the moisture regime, Sphagnumfuscum overtops Cladonia lichens to form a pronounced recurrence horizon.

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