Geochemical Studies in New Brunswick, Nova Scotia, and Ontario

Abstract Brook trout and yellow perch collected while surveying New Brunswick and Nova Scotia headwater lakes were analyzed for DDT metabolites, chlordane, hexacyclohexane isomers, hexachlorobenzene, toxaphene and PCB’s. Concentrations of DDT metabolites were much higher from fish taken from lakes in north-central N.B. (200-700 ng/g wet wt) than from fish taken elsewhere (<10 ng/g). Seventy to 90% of the DDT metabolites was DDE. Chlordane (3-13 ng/g) was analyzed in seven trout, six of them from central N.B. areas with intensive agriculture. Isomers of hexachlorocyclohexane were in highest concentration from north-central N.B. (10-20 ng/g), eastern N.S. (5-15 ng/g) and southern N.B. (5-20 ng/g). In most cases, alpha-hexachlorocyclohexane (lindane) was the isomer in highest concentration. Concentrations of hexachlorobenzene in fish tissues was highly variable with no obvious geographic bias. PCB’s were detected in very few fish, and no toxaphene was detected.

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Old forest policy and regulatory frameworks in Nova Scotia and New Brunswick with a comparison to British Columbia

The Forestry Chronicle ◽

10.5558/tfc2018-003 ◽

2018 ◽

Vol 94 (01) ◽

pp. 13-19 ◽

Cited By ~ 1

Author(s):

Amy Berry ◽

Amanda Lavers ◽

Lisa Mitchell

Keyword(s):

British Columbia ◽

Nova Scotia ◽

New Brunswick ◽

Forest Policy ◽

Regulatory Frameworks

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Pollen evidence for the postglacial origins of Nova Scotia's forests

Canadian Journal of Botany ◽

10.1139/b87-163 ◽

1987 ◽

Vol 65 (6) ◽

pp. 1163-1179 ◽

Cited By ~ 32

Author(s):

David G. Green

Keyword(s):

Nova Scotia ◽

New Brunswick ◽

New England ◽

Ice Sheets ◽

Arrival Times ◽

Local Environments ◽

Pollen Diagrams ◽

Propagule Dispersal ◽

Coastal Shelf ◽

Maritime Canada

Pollen diagrams from sites in southwest Nova Scotia and close to the New Brunswick – Nova Scotia border show that after retreat of the Wisconsin ice sheets, most tree taxa arrived in the extreme southwest of Nova Scotia earlier than anywhere else in the province. For most tree taxa, arrival times at sites in maritime Canada and in northeastern New England are consistent with very early dispersal of individuals along the coastal strip via the exposed coastal shelf and with their entering Nova Scotia from the southwest. These scattered pioneer populations acted as centres for major population expansions, which followed much later in some cases. Local environments, fire, and interspecies competition appear to have been more important than propagule dispersal rates as factors limiting the spread of most taxa.

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PREDATION BY INSECTS AND SPIDERS INHABITING COLONIAL WEBS OF HYPHANTRIA CUNEA

The Canadian Entomologist ◽

10.4039/ent1041197-8 ◽

1972 ◽

Vol 104 (8) ◽

pp. 1197-1207 ◽

Cited By ~ 18

Author(s):

R. F. Morris

Keyword(s):

Population Dynamics ◽

Nova Scotia ◽

North America ◽

Population Density ◽

New Brunswick ◽

Numerical Response ◽

Initial Number ◽

Hyphantria Cunea ◽

The North ◽

The Mean

AbstractThe number of predators inhabiting nests of Hyphantria cunea Drury was recorded annually for 13 years in four areas in New Brunswick and two areas on the coast of Nova Scotia. The most common groups were the pentatomids and spiders, which sometimes reproduced within the nests, but the mean number per nest was low in relation to the number of H. cunea larvae in the colonies. The rate of predation on fifth-instar larvae was low. Small or timid predators appeared to prey largely on moribund larvae or small saprophagans during the principal defoliating instars of H. cunea.No relationship could be detected between the number of larvae reaching the fifth instar and the number of predators in the colony; nor could any functional or numerical response of the predators to either the initial number of larvae per colony or the population density of colonies be found. It is concluded that the influence of the nest-inhabiting predators is small and relatively stable, and may be treated as a constant in the development of models to explain the population dynamics of H. cunea.H. cunea is a pest in parts of Europe and Asia, where it has been accidentally introduced from North America. The introduction to other continents of the North American predator, Podisus maculiventiis (Say), is discussed briefly.

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Limnetic Zooplankton Assemblages in Atlantic Canada with Special Reference to Acidification

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f86-055 ◽

1986 ◽

Vol 43 (2) ◽

pp. 444-456 ◽

Cited By ~ 34

Author(s):

J. C. H. Carter ◽

W. D. Taylor ◽

R. Chengalath ◽

D. A. Scruton

Keyword(s):

Nova Scotia ◽

New Brunswick ◽

Fish Predation ◽

Low Ph ◽

Buffering Capacity ◽

The Other ◽

Bay Of Fundy ◽

Factor Scores ◽

Multiple Discriminant Analysis ◽

Biological Factors

Crustacean and rotifer plankton assemblages of 93 lakes in Labrador, 107 in Newfoundland, and 142 in New Brunswick – Nova Scotia were investigated for evidence of correlations with lake morphometric, chemical, or biological factors. Labrador assemblages were almost completely lacking in identifiable structure. Newfoundland species clustered into two groups of different body size, suggesting the influence of fish predation. Only one species in Labrador and Newfoundland was significantly correlated with a derived factor related to lake water buffering capacity. New Brunswick – Nova Scotia species clustered into two groups, one featuring significant positive and the other significant negative correlations with the buffering factor. From this we conclude that acidification is having an impact on the limnetic zooplankton of these two provinces. Multiple discriminant analysis was used to demonstrate that New Brunswick – Nova Scotia lakes differing in their buffering capacity were also distinct in zooplankton composition. Lakes with low factor scores (low pH, alkalinity, and calcium) were mainly located in the Bay of Fundy region; this area has above average fog and precipitation, and lies within the summer air flow carrying pollutants from the south.

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Chrysomyxa arctostaphyli. [Distribution map].

Distribution Maps of Plant Diseases ◽

10.1079/dmpd/20066500441 ◽

1999 ◽

Author(s):

Keyword(s):

New York ◽

British Columbia ◽

New Mexico ◽

Nova Scotia ◽

North America ◽

New Brunswick ◽

South Dakota ◽

Geographical Distribution ◽

Distribution Map ◽

New Distribution

Abstract A new distribution map is provided for Chrysomyxa arctostaphyli Dietel Fungi: Basidiomycota: Uredinales Hosts: Picea spp. and Arctostaphylos uva-ursi. Information is given on the geographical distribution in NORTH AMERICA, Canada, Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland, Northwest, Territories, Nova Scotia, Ontario, Quebec, Saskatchewan, Yukon, USA, Alaska, Arizona, Colorado, Idaho, Maine, Michigan, Montana, New Mexico, New York, Oregon, South Dakota, Utah, Washington, Wisconsin, Wyoming.

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