lichens dominate, there is arctic sedge, arctic dwarf shrubs, dwarf birch.
Basically wht you would expect to find in an arctic transitional zone.
2007-11-02 07:19:11
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answer #1
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answered by Silverhorn 6
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The combined surveys at Burwash Bay yielded 118 vascular
plant species. Among these are 10 species from a total of
63 shown in distribution maps by Porsild (1964) and Porsild
and Cody (1980) to be confined to the low arctic bioclimatic
zone in the eastern Canadian Arctic: Arabis alpina L., Betula
glandulosa Michx., Deschampsia caespitosa (L.) Bernh.,
Epilobium angustifolium L., Erigeron humilus Graham,
Loiseleuria procumbens L., Pedicularis lapponica (L.) Desv.,
Potentilla nivea L., Poa alpina L., and Vaccinium vitis-idaea
L. Our reconnaissance surveys on the north and west sides of
Nettilling Lake and on the south and east sides of Amadjuak
Lake failed to detect Betula glandulosa there or to add to the
list of species. The results of the quadrat analysis for the
Burwash Bay site and the comparison sites are shown in
Table 2. While there is a fairly even representation of different
taxa (low dominance) and a moderate diversity at these
similar sites across the low arctic zone of Baffin Island,
diversity index values are generally lower at Burwash Bay
and Pangnirtung, sites at the northern low arctic limit, compared
with the more southerly sites at Lake Harbour and
Iqaluit.
From the field observations, four distinct vegetationlandscape
units were identified in the Nettilling–Amadjuak
study area:
1) Wet sedge-meadows, generally in marine or lacustrine
sediments and characterized by Carex spp. and Eriophorum
spp.;
2) Low shrub heath in areas of granite-gneiss bedrock, with
Salix arctica, Cassiope tetragona, Betula glandulosa,
Vaccinium vitis-ideae, Ledum palustre, and other heath
plants, and numerous herbs, grasses, and mosses;
3) Semivegetated granite-gneiss terrain, often with abundant
till or till veneer, with species such as Salix herbacea,
Saxifraga tricuspidata, Luzula confusa, Silene acaulis,
and abundant lichens; and
4) Polar semidesert limestone barrens with Salix lanata, Saxifraga
oppositifolia, and Leucanthemum integrifolium
2007-11-02 09:27:52
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answer #2
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answered by Loren S 7
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