scholarly journals Bur Buttercup, Ranunculus testiculatus, New to Eastern Canada

2006 ◽  
Vol 120 (3) ◽  
pp. 319
Author(s):  
Michael J. Oldham ◽  
Clive E. Goodwin ◽  
Sean Blaney
Keyword(s):  
North America ◽  
Western North America ◽  
Eastern Canada ◽  
Southern Ontario

Bur Buttercup (Ranunculus testiculatus) is newly reported for eastern Canada based on two collections from campgrounds in southern Ontario. This vernal, annual, Eurasian weed is widespread in western North America and is expanding its range in the east; it should be expected elsewhere in eastern Canada. Bur Buttercup is known to be toxic to livestock.

The climate of North America and adjacent ocean waters ca. 6 ka

2000 ◽  
Vol 37 (5) ◽  
pp. 661-681 ◽  
Author(s):  
K Gajewski ◽  
Robert Vance ◽  
M Sawada ◽  
Inez Fung ◽  
L Dennis Gignac ◽  
...  
Keyword(s):  
North America ◽  
Carbon Storage ◽  
Great Plains ◽  
Climate Model ◽  
Northern Great Plains ◽  
Western Canada ◽  
Western North America ◽  
Total Change ◽  
Eastern Canada ◽  
Climate Reconstructions

The climate of North America and the adjacent ocean at 6000 BP was estimated using five independent approaches. Using pollen data, the terrestrial climate was estimated by the movement of ecozone boundaries and by the method of modern analogues. Both analyses indicate warmer temperatures in the western Great Lakes area and the northern Great Plains. A model of Sphagnum-dominated peatland initiation, when forced by Canadian Climate Model 6 ka output projected a cooler and (or) wetter climate for continental western North America. Contrary to this, a reconstruction of the distribution of Sphagnum-dominated peatlands in western Canada indicates that they were located north of their modern distribution, suggesting warmer and (or) drier conditions at 6000 BP. This interpretation is strengthened by observations of lower lake levels at 6000 BP in western Canada. This drier climate may have been associated with warmer conditions as indicated by the quantitative climate reconstructions. In general, eastern North America was drier, while western North America was warmer and drier at 6 ka compared to the present. A model of vegetation and carbon storage, when forced using 6 ka Canadian Climate Model and pollen-based climate reconstructions, showed an increase in area covered by boreal forest, extending north and south of the present location. This was not, however, verified by the fossil data. Additionally, the model showed little total change in carbon storage at 6 ka in the terrestrial biosphere. Estimated sea surface temperatures off eastern Canada suggest warmer surface waters at 6 ka, in agreement with reconstructions based on terrestrial records from the eastern seaboard.

scholarly journals VIII - Genetical and taxonomic investigations in the Genus Oenothera

1936 ◽  
Vol 226 (536) ◽  
pp. 239-355 ◽  
Keyword(s):  
New Species ◽  
North America ◽  
Wild Plants ◽  
Western North America ◽  
Eastern Canada ◽  
Taxonomic Descriptions ◽  
Whole Number ◽  
New Varieties ◽  
A New Species ◽  
Genetic Experiment

The present study is the result of combining genetics with taxonomy in the investigation of a polymorphic group of wild plants. It shows a degree of multiformity which was hitherto unsuspected in the genus. All the early genetical work on Oenothera was done with species which had been naturalized in Europe and whose North American home was unknown. Later, de vries (1913) introduced various American forms into cultivation and used them in genetic experiment, but without full taxonomic descriptions. Bartlett was mainly concerned in describing about twenty-five new species from wild plants of eastern North America brought into cultivation, and the present writer has previously described five, all but one of them from Eastern Canada. Professional taxonomists have paid little attention to the Onagra section of the genus except for the occasional description of a new species from western North America, and the whole number of species now recognized and described is about 70, not counting the 17 new species and 15 new varieties described in the present paper. The reason for the neglect of the taxonomists, even after the mutation work concentrated a great deal of attention on the genus, was no doubt the difficulty that many of the characters are not well shown in ordinary herbarium material. Indeed, cultures are necessary in order to study adequately the characters of these forms ; but, on the other hand, species once clearly delimited in this way can be recognized in the field, at least when well-developed plants are available, and frequently from the rosette stage alone.

scholarly journals A new western Canadian record of Epeoloides pilosulus (Cresson), with discussion of ecological associations, distribution and conservation status in Canada

2018 ◽  
Vol 6 ◽  
pp. e22837 ◽  
Author(s):  
Cory Sheffield ◽  
Jennifer Heron
Keyword(s):  
Nova Scotia ◽  
North America ◽  
Conservation Status ◽  
Western North America ◽  
Southern Ontario ◽  
Ecological Associations ◽  
The 1960S

Epeoloidespilosulus, one of the rarest bees in North America, is a cleptoparasite ofMacropisbees which themselves are uncommon oligoleges of oil-producingLysimachiaflowers. Only two specimens of the cleptoparasite have been reported from Canada since the 1960s, both from Nova Scotia.A recently collected specimen ofEpeoloidespilosulusfrom Alberta, Canada confirms this species from that province and greatly increases its known range in western North America. This record and additional specimens from southern Ontario (one collected in 1978) have implications for the conservation status of this COSEWIC assessed species in Canada, which are discussed.

Synopsis of the genus Orius Wolff in America north of Mexico (Heteroptera: Anthocoridae)

1963 ◽  
Vol 95 (6) ◽  
pp. 631-636 ◽  
Author(s):  
Leonard A. Kelton
Keyword(s):  
United States ◽  
North America ◽  
Common Species ◽  
Palaearctic Region ◽  
Valid Species ◽  
Western North America ◽  
Eastern United States ◽  
Orius Insidiosus ◽  
Eastern Canada ◽  
Nearctic Region

AbstractFour species of Orius Wolff, a Holarctic genus, are known from the Nearctic region. Orius insidiosus (Say) is known from midwestern and eastern United States and eastern Canada, while O. tristicolor (White), shown here to be a valid species, is transcontinental in North America. O. minutus (L.), a common species in the Palaearctic region, is known from western North America. O. pumilio (Champ.) occurs in Florida. The distinguishing characteristics of the species are given, and a key is provided.

Trypanosoma ambystomae in Ambystoma spp. (order Caudata) in southern Ontario

1980 ◽  
Vol 58 (3) ◽  
pp. 466-469
Author(s):  
Patrick T. K. Woo ◽  
James P. Bogart ◽  
David L. Servage
Keyword(s):  
North America ◽  
Host Range ◽  
Ambystoma Maculatum ◽  
Western North America ◽  
Southern Ontario ◽  
First Report ◽  
Ambystoma Jeffersonianum ◽  
Ambystoma Laterale ◽  
Division Process

Using the haematocrit centrifuge technique, Trypanosoma ambystomae was recorded from Ambystoma jeffersonianum, Ambystoma platineum, Ambystoma laterale, Ambystoma maculatum, and Ambystoma tremblayi from five areas in southern Ontario. The percentage of infected animals varied from about 5% in A. tremblayi to 27% in A. platineum and A. maculatum. This report not only expands the host range for the trypanosome, it is also the first report of it being found outside western North America. The division process of the trypanosome in the salamander is described and it is shown that it can be maintained in salamanders in the laboratory by blood inoculation.

scholarly journals Damage to common plumbing materials caused by overwintering Leptoglossus occidentalis (Hemiptera: Coreidae)

2005 ◽  
Vol 137 (4) ◽  
pp. 492-496 ◽  
Author(s):  
Sarah L. Bates
Keyword(s):  
United States ◽  
North America ◽  
The United States ◽  
Economic Losses ◽  
Western North America ◽  
Eastern Canada ◽  
Seed Orchards ◽  
Leptoglossus Occidentalis ◽  
Conifer Seed ◽  
Western Conifer Seed Bug

The western conifer seed bug, Leptoglossus occidentalis Heidemann (Hemiptera: Coreidae), is a polyphagous pest of coniferous trees (Hedlin et al. 1981). Native to western North America, the seed bug has expanded its range to include eastern Canada and the United States (McPherson et al. 1990; Gall 1992; Marshall 1992; Ridge-O'Connor 2001; Bates 2002) and was recently introduced into Europe (Taylor et al. 2001). Both adults and nymphs feed by inserting their stylets into cones and digesting the contents of developing seeds, and they can cause serious economic losses in high-value seed orchards (Strong et al. 2001; Bates et al. 2002; Bates and Borden 2005).

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