THE ODONATA OF THE NORTHERN CORDILLERAN PEATLANDS OF NORTH AMERICA

1994 ◽  
Vol 126 (S169) ◽  
pp. 89-110 ◽  
Author(s):  
Sydney G. Cannings ◽  
Robert A. Cannings
Keyword(s):  
British Columbia ◽  
North America ◽  
Natural History ◽  
Boreal Forest ◽  
Northwest Territories ◽  
Transition Zone ◽  
Aquatic Habitats ◽  
Larval Ecology ◽  
Mountain Ranges ◽  
Wide Range

AbstractThe peatlands of the northern Cordillera of North America (consisting of the mountain ranges and intermontane lowlands and plateaus of British Columbia, Alberta, the Northwest Territories, the Yukon, and Alaska) support a distinctive Odonata fauna. Forty species in six families and 12 genera are typical of northwestern peatlands and another 12 species are occasional inhabitants of these environments. Of the 40 species, eight (20%) are peatland obligates and four (10%) almost always occur in such habitats. The remaining 28 (70%) are generalists and live in a wide range of aquatic habitats; nevertheless, they often are common inhabitants of, or are even dominant in, peatland environments. The fauna is dominated by the genera Aeshna Fabricius and Somatochlora Selys, with 11 and 10 species, respectively. It is also dominated by species restricted to Boreal regions (25 species, 62.5%), six (15%) of which have Holarctic distributions. The remainder of the fauna consists of eight species (20%) ranging transcontinentally in Transition Zone forests south of the Boreal Forest, five (12.5%) restricted to the Cordillera, and two (5%) with wide distributions in North America. Notes and maps summarize our knowledge of biogeographical information and previously unpublished records are listed. Significant southerly range extensions for species such as Coenagrion interrogatum (Hagen), Aeshna septentrionalis Burmeister, A. sitchensis Hagen, A. subarctica Walker, Somatochlora septentrionalis (Hagen), and Leucorrhinia patricia Walker are reported. Ecological and natural history data are outlined for each species. There do not appear to be any clear differences between the faunas of bogs and fens; dragonflies seem to respond to the habitat's form and structure rather than to its acidity or nutrient levels. Distinctive species associations result. A better understanding of the preferences of these dragonflies for different peatland microhabitats must await detailed research on oviposition behaviour and larval ecology.

scholarly journals Plauditus cestus (Provonsha & McCafferty, 1982) (Insecta: Ephemeroptera: Baetidae): New records from Virginia and the Northwest Territories, with notes on color variation

Check List ◽  
2014 ◽  
Vol 11 (1) ◽  
pp. 1498 ◽  
Author(s):  
Melissa R. Gorski ◽  
Autumn D. E. Fox ◽  
Jordan I. McQueen ◽  
Luke M. Jacobus
Keyword(s):  
North America ◽  
Northwest Territories ◽  
Abdominal Segment ◽  
New Records ◽  
Color Variation ◽  
Aquatic Habitats ◽  
Far North ◽  
Color Variant

Plauditus cestus (Provonsha & McCafferty, 1982) is widespread in eastern and central North America. We provide new data from Virginia that fill a gap in the range of distribution and new data from the Northwest Territories that extend the range of the species by over 1900 km to the northwest. The Northwest Territories specimen represents a new larval color variant, with pronounced coloration of abdominal segment 6. We emphasize the need for additional sampling of aquatic habitats in the Far North.

Pissodes terminalis. [Distribution map].

2006 ◽  
Author(s):  
Keyword(s):  
British Columbia ◽  
North America ◽  
South Dakota ◽  
Northwest Territories ◽  
Geographical Distribution ◽  
Pinus Banksiana ◽  
Pinus Contorta ◽  
Jack Pine ◽  
Distribution Map ◽  
New Distribution

Abstract A new distribution map is provided for Pissodes terminalis Hopping. Coleoptera: Curculionidae. Hosts: Jack pine (Pinus banksiana) and lodgepole pine (Pinus contorta). Information is given on the geographical distribution in North America (Canada, Alberta, British Columbia, Manitoba, Northwest Territories, Saskatchewan, Yukon, USA, California, Colorado, Idaho, Montana, Oregon, South Dakota, Washington, Wyoming).

Fires can overwinter in boreal forests of North America

2020 ◽  
Author(s):  
Rebecca Scholten ◽  
Sander Veraverbeke
Keyword(s):  
North America ◽  
Boreal Forest ◽  
Northwest Territories ◽  
Boreal Forests ◽  
Fire Spread ◽  
Burned Area ◽  
Organic Soils ◽  
Boreal Winter ◽  
Large Fire ◽  
Lightning Strikes

<div>The boreal forest stores 35 % of the world’s soil carbon reserves. Wildfires burn frequently in the boreal forest of North America and drive the boreal forest carbon balance. Previously, lightning strikes and human activities were identified as the sole ignition sources for wildfires in the boreal regions of North America. In recent years however, fire managers in Alaska, USA and Northwest Territories, Canada have started reporting the occurrence of overwintering fires. Overwintering fires are fires, that survive the cold and wet boreal winter by smouldering in deep, carbon-rich soils and re-emerge early in the subsequent spring, when fire weather favours fire spread.</div><div>Using the location and ignition dates of 42 overwintering fires reported by fire managers in Alaska and Northwest Territories between 2002 and 2017, we developed an algorithm to identify these new ignition sources. Our algorithm detected 8 out of 9 additional reported fires we used for validation, and further identified 15 unreported overwintering fires. Even though overwintering fires make up only 0.5 % of the burned area in total, they can amount to up to more than 10 % of the annual burned area after exceptionally large fire years.</div><div>We found that overwintering of fires is facilitated by deep burning into the organic soils. Overwintering fires occur more frequently after large fire years in combination with subsequent mild winters and springs leading to an early snowmelt.</div><div>In a warming climate, the boreal forest is burning more frequently and more intensely. As a consequence, the burned area and burn depth are predicted to increase. Our results suggest that overwintering fires are closely tied to these conditions and will therefore occur more often in the future.</div>

Anastrophyllum assimile and Marsupella revoluta, new to the interior of North America

1977 ◽  
Vol 55 (19) ◽  
pp. 2479-2484 ◽  
Author(s):  
Diana G. Horton
Keyword(s):  
British Columbia ◽  
North America ◽  
Northwest Territories ◽  
North American ◽  
Yukon Territory ◽  
The Arctic ◽  
Devon Island ◽  
New Localities ◽  
Central Eastern ◽  
Coastal British Columbia

Anastrophyllum assimile (Mitt.) Steph. and Marsupella revoluta (Nees) Lindb. are reported from the Keele Peak area, central-eastern Yukon Territory, Canada, and M. revoluta is also reported from Devon Island, Northwest Territories, Canada. These new localities extend a pattern of disjunct occurrences throughout the known range of both species, which further support the hypothesis of their relictual status. However, collections of A. assimile from coastal British Columbia and the Alexander Archipelago, Alaska, are indicative of strong oceanic affinities of North American populations of this species. Also, the arctic and alpine localities at which either A. assimile or M. revoluta might be expected to occur in the interior of Alaska and the Yukon are limited in number as both species invariably occur in association with siliceous substrates.

Synchrony in the snowshoe hare (Lepus americanus) cycle in northwestern North America, 1970–2012

2013 ◽  
Vol 91 (8) ◽  
pp. 562-572 ◽  
Author(s):  
Charles J. Krebs ◽  
Knut Kielland ◽  
John Bryant ◽  
Mark O’Donoghue ◽  
Frank Doyle ◽  
...  
Keyword(s):  
British Columbia ◽  
North America ◽  
Northwest Territories ◽  
Time Window ◽  
Lepus Americanus ◽  
Adjacent Area ◽  
Lynx Lynx ◽  
Lynx Canadensis ◽  
Canada Lynx ◽  
Northwestern North America

Snowshoe hares (Lepus americanus Erxleben, 1777) fluctuate in 9–10 year cycles throughout much of their North American range. Regional synchrony has been assumed to be the rule for these cycles, so that hare populations in virtually all of northwestern North America have been assumed to be in phase. We gathered qualitative and quantitative data on hare numbers and fur returns of Canada lynx (Lynx canadensis Kerr, 1792) in the boreal forest regions of Alaska, Yukon, Northwest Territories, and northern British Columbia to describe synchrony in the time window of 1970–2012. Broad-scale synchrony in lynx fur returns was strong from 1970 to about 1995 but then seemed to break down in different parts of this region. Hare populations at 20 sites in Alaska, the Yukon, and Northwest Territories showed peak populations that lagged by 1–4 years during the 1990s and 2000s cycles. The simplest hypothesis to explain these patterns of asynchrony in hare cycles is the movement of predators from British Columbia north into the Yukon and then east into the Northwest Territories and west into Alaska. A traveling wave of these cycles is clearly seen in the lynx fur returns from western Canada and Alaska from 1970 to 2009. One consequence of a failure of synchrony is that hare predators like Canada lynx and Great-horned Owls (Bubo virginianus (Gmelin, 1788)) can move from one adjacent area to the next within this region and survive long enough to prolong low densities in hare populations that have declined earlier.

Cystidicola farionis (Nematoda) as an Indicator of Lake Trout (Salvelinus namaycush) of Bering Ancestry

1983 ◽  
Vol 40 (11) ◽  
pp. 2034-2040 ◽  
Author(s):  
Geoff A. Black
Keyword(s):  
British Columbia ◽  
North America ◽  
Northwest Territories ◽  
Lake Trout ◽  
Appalachian Mountains ◽  
River System ◽  
Salvelinus Namaycush ◽  
Glacial Retreat ◽  
Yukon River ◽  
Cystidicola Farionis

Cystidicola farionis Fischer is widely distributed in fishes in northern North America west of the Appalachian Mountains. The swimbladders of lake trout (Salvelinus namaycush) from 225 localities across North America were examined for the parasite but only those from the Alsek, Coppermine, Flat, Peel, Stikine, Upper Liard, and Yukon River systems were infected with mature nematodes. The ancestors of fishes in these watersheds survived glaciation in a Bering refugiurn. Thus, this strain of C. farionis probably had a refugium in Beringia in the unglaciated parts of the Yukon River system and dispersed from there into northern British Columbia and the coastal mainland of the Northwest Territories during glacial retreat.

NEWLY RECOGNIZED HOLARCTIC AND INTRODUCED PLANT BUGS IN NORTH AMERICA (HETEROPTERA: MIRIDAE)

1998 ◽  
Vol 130 (3) ◽  
pp. 267-283 ◽  
Author(s):  
Michael D. Schwartz ◽  
G.G.E. Scudder
Keyword(s):  
British Columbia ◽  
North America ◽  
Northwest Territories ◽  
North American ◽  
Washington State ◽  
Yukon Territory ◽  
Lygus Rugulipennis

AbstractThe first North American records forDeraeocoris punctulatus(Fallén),Labopidea artemisiae(Sahlberg), andLabopidea bermaniKerzhner indicate that the species are naturally Holarctic.Lygus rugulipennisPoppius is now considered naturally Holarctic after specimens ofLygus perplexusStanger from Alaska, Yukon Territory, and Northwest Territories are correctly identified asL.rugulipennis. Additional North American localities forLabopidea discolor(Sahlberg) support the contention that the species is naturally Holarctic. Collections ofOrthotylus ochrotrichusFieber from Royal Oak, British Columbia, andMalacocoris chlorizansPanzer from British Columbia and Washington state suggest that these species are adventive to North America. Diagnoses are provided to distinguish all the taxa from other North American congeners. A key to the northern Nearctic species ofLabopideais given.

Climate and Permafrost Dynamics of the Alaskan Boreal Forest

2006 ◽  
Author(s):  
Larry D. Hinzman ◽  
Leslie A. Viereck
Keyword(s):  
Boreal Forest ◽  
Northern Region ◽  
Mean Annual Temperature ◽  
Main Body ◽  
Coastal Forests ◽  
The West ◽  
Climate Conditions ◽  
Mountain Ranges ◽  
Discontinuous Permafrost ◽  
Wide Range

There are large climatic differences among the boreal regions of the world. The extreme continental climates of central Siberia, with a mean annual temperature of –11°C or colder and precipitation of only 150 mm, for example, contrasts strikingly with the semicoastal climate of Newfoundland, with a mean annual temperature of +5°C and precipitation of 1400 mm. Yet both are considered boreal. This wide range in mean annual temperatures translates into large variation in the soil thermal conditions. Although much of the northern region of the boreal forest is underlain by continuous and discontinuous permafrost, southern regions are entirely permafrost-free. Boreal Canada has been classified into four major ecoclimatic provinces (Ecoregions Working Group 1989). The Subarctic Ecoclimatic Province extends from treeline in northern Canada south to the border with continuous stands of closed spruce. It ranges from the highly continental areas of northern Yukon Territory to the wetter and somewhat warmer regions of the Labrador Peninsula. The Boreal Ecoclimatic Province includes the main body of the boreal forests of Canada from the Mackenzie River east to Newfoundland. It is a complicated province that has been divided into High, Mid-, and Low Boreal, with a wide range of climate conditions. The Subarctic Cordilleran Ecoclimatic Province occurs only at higher elevations in western Canada. Forested areas in this region are usually restricted to valley bottoms or low, south-facing slopes. The Cordilleran Ecoclimatic Province includes the mountain ranges along the west coast and the continental divide from Montana to Alaska and from the Yukon River south to the boundary with the coastal forests. The boreal portion of this province has climates similar to that of the eastern section of the Interior Highland Ecoregion of Alaska (Fig. 2.3, Gallant et al. 1995). Alaska does not fit well into these Canadian ecoclimatic provinces because of differences in elevation, the effects of the two east-west-oriented mountain ranges (the Alaska and Brooks Ranges), and the coastal influences of the Bering Sea to the west and Cook Inlet to the south (Fig. 1.1; Hopkins 1959, Hare and Ritchie 1972). Hammond and Yarie (1996) separated Alaska into 35 ecoclimatic regions, of which nine include areas of boreal forest.

The taxonomy and distribution of rare or uncommon species of Albatrellus in western North America

1997 ◽  
Vol 75 (2) ◽  
pp. 261-273 ◽  
Author(s):  
J. Ginns
Keyword(s):  
British Columbia ◽  
New Mexico ◽  
North America ◽  
Key Words ◽  
Northwest Territories ◽  
Yukon Territory ◽  
Western North America ◽  
General Locality

Habitat data, although sparse, and occurrence are summarized for nine rare or uncommon species of Albatrellus. Significant range extensions are Albatrellus avellaneus in British Columbia, Oregon, and Washington, Albatrellus caeruleoporus in California, British Columbia, Oregon, and Washington, Albatrellus dispansus in Washington, Albatrellus ellisii in Colorado, Oregon, Washington, and Wyoming, Albatrellus flettii in Alaska, Alberta, northern British Columbia, Idaho, New Mexico, and Wyoming, Albatrellus subrubescens in Alberta, California, Northwest Territories, and Washington, Albatrellus syringae in North America (Alaska, Alberta, British Columbia, and Yukon Territory). Three additional collections of Albatrellus skamanius bring the total known collections of the species to four; all are from the same general locality. A key to the western species, emphasizing features of fresh basidiomes, is included. The basidiome features of these species are supplemented with data from additional collections. Spore sizes in several species are more critically defined. Amyloidity occurred in basidiospores and (or) hyphae of A. avellaneus, Albatrellus affin. cristatus, A. ellisii, A. flettii, A. skamanius, and A. subrubescens. Key words: systematics, ecology, Basidiomycetes, conservation, biodiversity, fungi.

Fusicladium romellianum. [Descriptions of Fungi and Bacteria].

2002 ◽  
Author(s):  
K. Schubert
Keyword(s):  
British Columbia ◽  
North America ◽  
Northwest Territories ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Airborne Conidia

Abstract A description is provided for Fusicladium romellianum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: Leaf spot. HOSTS: Species of Populus (Salicaceae), including P. alba, P. cataracti, P. deltoides, P. grandidentata, P. tremuloides and P. trichocarpa. GEOGRAPHICAL DISTRIBUTION: ASIA: India, Kazakhstan. NORTH AMERICA: Canada (Alberta, British Columbia, Manitoba, Newfoundland, Northwest Territories, Ontario, Quebec, Saskatchewan), USA (Alaska, Colorado, Utah, Wisconsin). EUROPE: Denmark, Finland, Latvia, Sweden. TRANSMISSION: By airborne conidia.

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