BP environ, Picea abies, Larix sibirica, Populus tremula, Sorbus aucuparia et Alnus incana
etaient des especes subordonnees sur une couverture morte dominee par des especes vegetales caracteristiques de terrains boises prealpins ou subalpins.
The dynamics of biomass production in relation to foliar and root traits in a grey alder (Alnus incana
(L.) Moench) plantation on abandoned agricultural land.
Bite size (g/bite) Species n x SD arrow-leaved groundsel (Senecio triangularis) 3 1.56 0.03 bog birch (Betula glandulosa) 11 0.54 0.02 drummond willow (Salix drummondiana) 28 1.56 0.35 geyer willow (Salix geyeriana) 52 1.08 0.12 grasses 20 0.66 0.16 mountain alder (Alnus incana
) 23 1.30 0.23 mountain willow (Salix monticola) 61 1.32 0.26 plane-leaf willow (Salix planifolia) 45 0.60 0.05 western dock (Rumex aquaticus) 8 2.48 0.19 thistle (Cirsium spp.) 2 1.28 0.03 trembling aspen (Populus tremuloides) 6 1.80 0.31 whiplash willow (Salix lasiandra) 6 1.38 0.22 wolf willow (Salix wok) 3 0.64 0.04 yellow water-lily (Nuphar lutea ssp.
Black alder and grey alder (Alnus incana
) grow in northern Europe and western Siberia.
Schwabe (1991) estimated the persistent seed bank in the soils of a forest community dominated by young Alnus incana
trees at 935 viable seeds per [m.sup.2].
(speckled or hoary alder), abundant along streams, &c.
Betula pendula, Populus tremula, and Alnus incana
were excluded from the age structure analysis due to their very small number in plots (< 2 in each plot except in Barkava).
Lignin used in the experiments was extracted from long-term sample growths of grey alder (Alnus incana
L.) Moench) wood after being processed for 2 min by saturated steam at 235[degrees]C under pressure of 3.2 MPa.
Growth of actinorhizal plants as influenced by the form of nitrogen with special reference to Myrica gale and Alnus incana
. Journal of Experimental Botany 43:1349-1359.
Other species included mountain alder (Alnus incana
, 2.5%), quaking aspen (Populus tremuloides, 1.1%), and bog birch (Betula glandulosa, 1.0%).
Scots pine, silver birch and gray alder (Alnus incana
(L.) Moench) penetrated into the plantation later.
Breeding sites discovered in Siberia were surrounded by vegetation that included bushes and hardwood trees (e.g., willows (Salix spp.), alder trees (Alnus incana
), and occasionally coniferous trees) and resembled the habitat near the Canadian mainland breeding site of Churchill, Manitoba (Chartier and Cooke, 1980).
(1994) has shown that the fungus Penicillium nodositatum, which induces myconodules on various Alnus species (Valla et al., 1989), enters the root of Alnus incana
via root hairs.
Grey alder (Alnus incana
(L.) Moench) occurs in small stands or as isolated individuals in the conifer forest and as solitary trees in the subalpine birch belt.
(1991) noted that an association with less palatable alder (Alnus incana
) did not provide protection for Scots pine (Pinus sylvestris) against free-ranging moose (Alces alces), while there was a slight, but statistically non-significant, tendency toward an increased consumption per pine tree when associated with more palatable aspen (Populus tremula).