Vascular plants from some localities in the western and northern parts of the Canadian Arctic Archipelago

Kuc, Marian

doi:10.1139/b70-283

Cited by 5 publications

(4 citation statements)

References 1 publication

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“…Young (1971) suggested that the association between summer Deshaye, 1983Deshaye, 1983Deshaye, 1983Deshaye, 1983Boumerias, 1975Brassard and Longton, 1970Calder, 195 1 Savile, 196 1 Webber, 1964Webber, 1964Webber, 1964Hainault , 1966Bruggeman and Calder, 1953Powell, 1971Mason et al, 1972Tedrow et al, 1968Savile, 1972aBrown, 1953Barrett and Teeri, 1973Cody et al, 1984Deshaye, 1983Deshaye, 1983Deshaye, 1983Bridgeland and Gillett, 1983Bliss, 1977Edlund, 1980Brassard and Beschel, 1968Muller, 1979Gillett, 1976Savile, 1959Hainault, 1966Savile, 1972bBell and Bliss, 1980Nettleship and Smith, 1975Kuc, 1970McLaren, 1964Savile, 1972aSavile. 1972a 9.4 6.2 5.6 6.2 9.3 5.4 7.6 3.2 5.3 6.7 5.3 4.1 3.6 3.6 5.9 3.9 4.1 8.7 4.6 10.0 7.5 5.0 6.5 6.…”

Section: Resultsmentioning

confidence: 99%

Summer Air Temperature and Number of Vascular Species in Arctic Canada

Rannie¹

1986

ARCTIC

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Exceptionally high correlations (r = 0.90-0.97) between number of vascular species and various indices of summer warmth at 38 localities in the Canadian Arctic support Young's contention that summer thermal regime is the most important ecological factor controlling the broad zonation of arctic flora. Highest correlations (r= 0.97) are with July mean temperature and mean number of degree-days above 0°C in July. Regression equations relating July mean temperature and number of species indicate a diversity gradient of about 25 species per degree. These equations provide estimates of species numbers or July temperatures in areas with poor climate or botanical data and may also be used to identify anomalous conditions.

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Section: Resultsmentioning

confidence: 99%

Summer Air Temperature and Number of Vascular Species in Arctic Canada

Rannie¹

1986

ARCTIC

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“…Species such as Crepis nana (Herbarium accession numbers 496101,502460 and 502552), Petasites frigidus, and Senecio congestus (Fig. 17g) occur only on southeastern Prince Patrick Island and warm areas of western Melville Island (Kuc, 1970;Porsild and Cody, 1980;Edlund, 1986a). Other Compositae show the dual disjunct distribution similar to that of Salix Polaris, occurring only in zone 4 on both Melville Island and in the intermontane area.…”

Section: Floristics and Regional Climate Patternsmentioning

confidence: 99%

Regional Congruence of Vegetation and Summer Climate Patterns in the Queen Elizabeth Islands, Northwest Territories, Canada

Edlund¹,

Alt²

1989

ARCTIC

171

212

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In the Queen Elizabeth Islands, regional distributions of vegetation and many summer climate patterns show similar, distinctive S-shaped patterns, a response to the interaction between regional topography and persistent northwesterly flow from the central Arctic Ocean. The cool and cloudy central polar pack ice climate bulges almost unimpeded into the low-lying islands of the northwest and north-central sector. This region has the least vascular plant diversity and is dominated almost entirely by herbaceous species. The mountains of Axel Heiberg and Ellesmere islands create a barrier that effectively shelters an intermontane region from both the central Arctic Ocean climate and travelling cyclonic systems. In this large intermontane zone regional minimums of cloud cover and maximums of temperatures and melt season duration are found. This area contains the most dense and diverse vascular plant assemblages. Woody species and sedges dominate, and many species with more southerly limits occur as disjuncts. The plateaus and highlands in the southern islands modify the central Arctic Ocean climate sufficiently to produce an intermediate climate. Woody species and sedges also dominate this area; however, the density and diversity are less than that of the intermontane area. Several phytogeographic limits occur in the Queen Elizabeth Islands, including the northern limits of woody plants and sedges, and the northern limits of the dominance of woody plants and sedges. These regional boundaries roughly coincide with regional mean July isotherms of 3 and 4°C respectively.

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“…Larix wood is common at Worth Point where KUC (1974) reported stumps of Larix laricina up to 26 cm in diameter. They possess extremely narrow growth rings, which probably means that the trees were growing near treeline.…”

Section: Fossil Woodmentioning

confidence: 99%

“…at WP are unusually well preserved considering that they are likely older than 730 ka. For example, KUC (1974) recorded several species of foliose lichens and many of the higher plant fossils retain leaves, buds and flower parts. The few insect fossils from samples studied by Kuc are also exceptionally well preserved.…”

Section: Worth Point Formationmentioning

confidence: 99%

Preglacial and Interglacial Environments of Banks Island: Pollen and Macrofossils from Duck Hawk Bluffs and Related Sites

Matthews¹,

Mott²,

Vincent³

2007

gpq

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Sediments ranging in age from Tertiary to Late Quaternary are exposed at Duck Hawk Bluffs near Sachs Harbour on Banks Island (NWT). Fossil pollen and macrofossils of plants and arthropods from various nonglacial sediments at Duck Hawk Bluffs and related sites on Banks and Victoria islands make it possible to infer some of the climatic/biotic changes during that time span. At the time of deposition of the Miocene-Pliocene Beaufort Formation, southern Banks Island supported a rich coniferous forest, containing several species of conifers and various hardwoods. An upper member of the Beaufort Fm. is characterized by a more depauperate coniferous forest assemblage, yet still contains plants now foreign to the entire NWT. The late Tertiary/early Quaternary Worth Point Formation was deposited when larch-dominated forest-tundra characterized southern Banks Island. Larch may have grown on the island during the following Morgan Bluffs Interglaciation (>730 ka), but in other respects the flora and fauna of that time seem to have been low Arctic in character. Similar conditions existed during the Cape Collinson Interglaciation ( = Sangamon), though by that time, coniferous trees had definitely disappeared from the island.Les falaises Duck Hawk, près de Sachs Harbour, présentent des sédiments dont l'âge varie du Tertiaire jusqu'au Quaternaire supérieur. Le pollen et les macrorestes de végétaux et d'animaux fossiles, prélevés dans divers sédiments non glaciaires dans les falaises Duck Hawk et d'autres sites associés dans les îles de Banks et Victoria, enregistrent des variations climatiques et biotiques au cours de cette période. Au moment de la mise en place des dépôts miocènes-pliocènes de la Formation de Beaufort, une forêt coniférienne, composée de plusieurs espèces de conifères et de divers feuillus, existait au sud de l'île de Banks. Un membre supérieur de la Formation de Beaufort est caractérisé par une forêt coniférienne appauvrie bien que plusieurs plantes, maintenant disparues de l'ensemble des T.N.-O., ont été identifées. La Formation de Worth Point, datant de la fin du Tertiaire et du Quaternaire inférieur, a été mise en place lorsqu'une toundra forestière, dominée par le mélèze, caractérisait l'île de Banks méridionale. Le mélèze croissait peut-être dans l'île lors de l'interglaciaire subséquent de Morgan Bluffs (>730 ka BP), mais les autres indicateurs permettent de croire que la faune et la flore étaient caractéristiques de celle du bas Arctique. Des conditions semblables ont existé lors de l'interglaciaire de Cape Collinson ( = Sangamon), bien qu'à ce moment les conifères avaient définitivement disparu de l'île.An den Steilkùsten von Duck Hawk in der Nâhe von Sachs Harbour auf der Insel Banks (Nord-West-Territorien) befinden sich Sedimente, deren Datierung vom Tertiar bis zum spâten Quaternàr reicht. Fossiler Pollen und Makrofossile von Pflanzen und GliederfùBern von verschiedenen nichtglazialen Sedimenten der Steilkùsten von Duck Hawk und verwandten Standorten auf den Insein Banks und Victoria erlauben, auf e...

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Vascular plants from some localities in the western and northern parts of the Canadian Arctic Archipelago

Cited by 5 publications

References 1 publication

Summer Air Temperature and Number of Vascular Species in Arctic Canada

Summer Air Temperature and Number of Vascular Species in Arctic Canada

Regional Congruence of Vegetation and Summer Climate Patterns in the Queen Elizabeth Islands, Northwest Territories, Canada

Preglacial and Interglacial Environments of Banks Island: Pollen and Macrofossils from Duck Hawk Bluffs and Related Sites

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