Une épidémie d’insectes, facteur de déboisement dans le Québec

Spruce budworm bas invaded the forest of Québec since 1939, especially the pines of the coniferous area. There are jour major infested regions : three are located on the North shore of the St. Lawrence river : in the Gatineau river bassin, in the Laurentians between the Lachute Area and lake St. John, and in the North Shore region behind Baie Comeau Sept-Iles. The fourth region starts behind Rimouski and spreads eastward, covering the whole Gaspé peninsula. In this last the authorities are quite concerned about this plague, which is becoming a serious menace to the forest industries. Various air-spays have been used during the past jour years in order to circumscribe the dammages, and more than 4,000,000 acres have been treated with DDT, first step toward the rehabilitation of the forest.

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A Virus Disease and Introduced Parasites as Factors Controlling the European Spruce Sawfly, Diprion hercyniae (Htg.), in Central New Brunswick

The Canadian Entomologist ◽

10.4039/ent89371-8 ◽

1957 ◽

Vol 89 (8) ◽

pp. 371-378 ◽

Cited By ~ 57

Author(s):

F. T. Bird ◽

D. E. Elgee

Keyword(s):

Nova Scotia ◽

New Brunswick ◽

New Hampshire ◽

Virus Disease ◽

Spruce Forests ◽

North Shore ◽

The North ◽

Gaspe Peninsula ◽

Gaspé Peninsula ◽

St Lawrence River

An outbreak of the European spruce sawfly, Diprion hercyniae (Htg.), was discovered in the Gaspé Peninsula in 1930. By 1938, heavy infestations had developed west of the Gaspé Peninsula in Quebec, throughout New Brunswick and northern Maine, and in parts of Vermont and New Hampshire. Moderate to light infestations occurred through all other parts of the spruce forests of this region and extended from Nova Scotia, to the north shore of the St. Lawrence River, and west to Ontario.

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Weather and Outbreaks of the Spruce Budworm in the Province of Quebec from 1939 to 1956

The Canadian Entomologist ◽

10.4039/ent93118-2 ◽

1961 ◽

Vol 93 (2) ◽

pp. 118-123 ◽

Cited By ~ 22

Author(s):

J. G. Pilon ◽

J. R. Blais

Keyword(s):

Choristoneura Fumiferana ◽

Abies Balsamea ◽

Spruce Budworm ◽

Balsam Fir ◽

The Past ◽

Forest Regions ◽

Tree Component ◽

Gaspe Peninsula ◽

Gaspé Peninsula

Nearly all forest regions in the Province of Quebec where balsam fir (Abies balsamea (L.) Mill.) is an important tree component have been subjected to severe defoliation by the spruce budworm, Choristoneura fumiferana (Clem.), during the past 20 years. These outbreaks have followed an easterly direction beginning near the Ontario-Quebec border in 1939 and ending in the Gaspé Peninsula in 1958.

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Seismicity and faulting in the Charlevoix zone of the St. Lawrence Valley

Bulletin of the Seismological Society of America ◽

10.1785/bssa0740020595 ◽

1984 ◽

Vol 74 (2) ◽

pp. 595-603

Author(s):

F. M. Anglin

Keyword(s):

Active Zone ◽

Continuous Monitoring ◽

North Shore ◽

The North ◽

Earthquake Zone ◽

St Lawrence River

Abstract Continuous monitoring of the seismically active Charlevoix zone since late 1977 has delineated the boundaries of the earthquake zone under the north shore and has enabled an association to be made with surface mapped faults that strike along the St. Lawrence Valley and dip to the southeast. Within the active zone, aseismic volumes are found under parts of the St. Lawrence River and another elongated zone of activity is found to the southeast on unmapped faults dipping under the river. The previous suggestions that the activity is related to old rift faults, which have been later weakened by a meteor impact, would seem to be upheld.

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II.—Notes on the Pleistocene of the North-West Territories of Canada, North-West and West of Hudson Bay

Geological Magazine ◽

10.1017/s0016756800143596 ◽

1894 ◽

Vol 1 (9) ◽

pp. 394-399 ◽

Cited By ~ 3

Author(s):

J. Burr Tyrrell

Keyword(s):

Geological Survey ◽

Hudson Bay ◽

North West ◽

The Past ◽

North Shore ◽

The North ◽

South West ◽

North West Territories

In the extreme northernmost part of Canada, lying between North Latitudes 56° and 68° and West Longitudes 88° and 112°, is an area of about 400,000 square miles, which had up to the past two years remained geologically unexplored.In 1892 the Director of the Geological Survey of Canada sent the writer to explore the country north of Churchill River, and south-west of Lake Athabasca;in1893 the exploration was continued northward, along the north shore of Athabasca Lake

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Preliminary interpretation of the first refraction arrivals in Gaspé from shots in Labrador and Quebec

Canadian Journal of Earth Sciences ◽

10.1139/e69-071 ◽

1969 ◽

Vol 6 (4) ◽

pp. 771-774 ◽

Cited By ~ 7

Author(s):

Douglas S. Rankin ◽

Ravi Ravindra ◽

David Zwicker

Keyword(s):

Upper Mantle ◽

Arrival Time ◽

The South ◽

North Shore ◽

The North ◽

A Value ◽

South Shore ◽

Compressional Velocity ◽

St Lawrence River

Previous work in the Gulf of St. Lawrence has yielded an unusually high upper-mantle compressional velocity. In the Gaspé area a more recent determination has yielded a value of 8.75 ± 0.20 km/s for an unreversed profile. The arrival time at a station on the north shore of the St. Lawrence River suggests that there is no major difference in velocity and depth relative to the south shore.

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The Sedimentary Structures and Depositional Mechanics of Certain Ordovician Turbidites, Cloridorme Formation, Gaspé Peninsula, Quebec

Canadian Journal of Earth Sciences ◽

10.1139/e75-171 ◽

1975 ◽

Vol 12 (11) ◽

pp. 1934-1952 ◽

Cited By ~ 10

Author(s):

Keith Skipper ◽

Gerard V. Middleton

Keyword(s):

Large Scale ◽

Fine Sand ◽

Coarse Sand ◽

Turbidity Currents ◽

Upstream Migration ◽

High Concentration ◽

Sedimentary Structures ◽

The North ◽

Gaspe Peninsula ◽

Gaspé Peninsula

Turbidites, belonging to the β1, member, Cloridorme Formation, are exposed on the north shore of the Gaspé Peninsula, Quebec. Their structural attitude is such that vertical sections through turbidite beds are exposed on the wave-cut platform and their strike is approximately parallel to the paleocurrent direction, as shown by sole marks on the bases of beds.Certain thick turbidite beds, in a distal position, display a sequence of sedimentary structures which differs from the sequence defined by Bouma. Three broad divisions are recognized: a basal division consists of either limestone or quartz granule to pebble conglomerate (0–4 cm thick) or coarse sand graywacke or calcareous wacke (0–15 cm thick). Basal divisions of calcareous wacke frequently display ripple-lamination, parallel lamination, or upstream-inclined laminae. Where the upstream inclined laminae form a single set, they occur below a sinuous profile (wavelength 40–80 cm, and amplitude 2–5 cm).A second division (0–330 cm thick) consists in most places of spindle- or globular-shaped calcareous nodules scattered in an argillaceous host. In some beds, streaking and lobing of light colored, carbonate bearing material is associated with these nodules. Internal hemi-ellipsoid structures, arranged en echelon and convex towards the base of the bed, are displayed from the second division. The upper division consists of fine grained siltstone and shale.The upstream-inclined laminae in the basal division of calcareous wacke beds are interpreted as being the result of the upstream migration of antidunes. The nodules within the second division developed as 'pseudo-nodules'. The hemi-ellipsoid structures resemble damped, large scale (macroturbulent) eddies associated with the flow of dense grain dispersions.Correlation of these beds has been achieved over a distance of 12 km. Basal divisions of granule and pebble conglomerate persist over this distance and show that coarse particles may be transported by turbidity currents over long distances. The sedimentary structures of the basal divisions of several calcareous wacke beds might be interpreted as the result of either an increase in flow regime downcurrent, or of nonpreservation of structures at up-current localities.The beds were probably deposited from turbidity currents composed largely of mud and fine sand, but containing a zone of coarse grains concentrated near the bed. The basal division was deposited from this lower zone and a period of traction formed rippled, flat, or antidune bed forms. Stratification in the basal division was preserved by the rapid deposition on top of sediment that settled en masse from the subsequent high concentration body of the current. The formation of a succession of 'quick' beds led to the sedimentation of the second division. The flows responsible for the sequence of structures observed and the downcurrent persistence of the beds probably approached closely a state of 'autosuspension'.

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Control of Black Fly Larvae (Diptera: Simuliidae) in the Forests of Eastern Canada by Aircraft Spraying

The Canadian Entomologist ◽

10.4039/ent92745-10 ◽

1960 ◽

Vol 92 (10) ◽

pp. 745-754 ◽

Cited By ~ 2

Author(s):

A. S. West ◽

A. W. A. Brown ◽

D. G. Peterson

Keyword(s):

Black Flies ◽

Eastern Canada ◽

Black Fly ◽

North Shore ◽

The North ◽

Fly Larvae ◽

And Control ◽

St Lawrence River ◽

Made In

The results reported in this paper are part of a study of the biology and control of black flies in the forests of Eastern Canada conducted on the north shore of the St. Lawrence River, near Baie Comeau, Quebec, during 1954, 1955, and 1956. Reference to this study is made in a review by Peterson and Wolfe (1958). The identification and biology of the black flies of this region has been reported on by Wolfe and Peterson (1959) who also describe the topography of the region. The important feature of this rugged area is an abundance of fast-flowing streams which provide highly suitable environments for the development of black-fly populations.

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Late Precambrian Rocks of the North Shore of the St. Lawrence River and of the Mistassini and Otish Mountains Areas, Quebec

The Proterozoic in Canada ◽

10.3138/9781487595838-022 ◽

1957 ◽

pp. 124-131 ◽

Cited By ~ 2

Author(s):

Robert Bergeron

Keyword(s):

Precambrian Rocks ◽

Late Precambrian ◽

North Shore ◽

The North ◽

St Lawrence River

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Development of a New TRIPLEX-Insect Model for Simulating the Effect of Spruce Budworm on Forest Carbon Dynamics

Forests ◽

10.3390/f9090513 ◽

2018 ◽

Vol 9 (9) ◽

pp. 513 ◽

Cited By ~ 2

Author(s):

Zelin Liu ◽

Changhui Peng ◽

Louis De Grandpré ◽

Jean-Noël Candau ◽

Xiaolu Zhou ◽

...

Keyword(s):

Tree Mortality ◽

Spruce Budworm ◽

Published Data ◽

Insect Management ◽

Cape Breton Island ◽

North Shore ◽

The North ◽

Cape Breton ◽

Conifer Trees ◽

Forest C

The spruce budworm (SBW) defoliates and kills conifer trees, consequently affecting carbon (C) exchanges between the land and atmosphere. Here, we developed a new TRIPLEX-Insect sub-model to quantify the impacts of insect outbreaks on forest C fluxes. We modeled annual defoliation (AD), cumulative defoliation (CD), and tree mortality. The model was validated against observed and published data at the stand level in the North Shore region of Québec and Cape Breton Island in Nova Scotia, Canada. The results suggest that TRIPLEX-Insect performs very well in capturing tree mortality following SBW outbreaks and slightly underestimates current annual volume increment (CAI). In both mature and immature forests, the simulation model suggests a larger reduction in gross primary productivity (GPP) than in autotrophic respiration (Ra) at the same defoliation level when tree mortality was low. After an SBW outbreak, the growth release of surviving trees contributes to the recovery of annual net ecosystem productivity (NEP) based on forest age if mortality is not excessive. Overall, the TRIPLEX-Insect model is capable of simulating C dynamics of balsam fir following SBW disturbances and can be used as an efficient tool in forest insect management.

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