Effects of a forest tent caterpillar outbreak on the dynamics of mixedwood boreal forests of eastern Canada

Ecoscience ◽  
2013 ◽  
Vol 20 (2) ◽  
pp. 182-193 ◽  
Author(s):  
Julien Moulinier ◽  
François Lorenzetti ◽  
Yves Bergeron
Keyword(s):  
Boreal Forests ◽  
Forest Tent Caterpillar ◽  
Eastern Canada ◽  
Tent Caterpillar

scholarly journals The Delphi method as an alternative to standard committee meetings to identify ecological issues for forest ecosystem-based management: A case study

2016 ◽  
Vol 92 (04) ◽  
pp. 453-464 ◽  
Author(s):  
K. Waldron ◽  
J.-M Lussier ◽  
N. Thiffault ◽  
F. Bujold ◽  
J.-C. Ruel ◽  
...  
Keyword(s):  
Forest Ecosystem ◽  
Delphi Method ◽  
Boreal Forests ◽  
Expert Consultation ◽  
Committee Meeting ◽  
Eastern Canada ◽  
Face To Face ◽  
Time Investment ◽  
Second Growth ◽  
The Face

The face-to-face committee meeting is one of the most common expert consultation methods used in forest management. However, it is also laden with disadvantages, such as potential inequity in its consideration of participant opinion and the time involvement required. This led us to evaluate another expert consultation method, the Delphi method, namely by implementing it to identify ecological issues associated with second-growth boreal forests in eastern Canada. We compared this method to the committee meeting method with regard to the time investment required and the efficiency of the consultations. In all, 21 experts participated in three rounds of our implementation of the Delphi method. Subsequently, we administered an appreciation survey comparing the participants’ attitudes vis-à-vis the two methods. These comparisons showed that Delphi was less time-consuming compared to a committee meeting consultation of comparable scope. Participants also considered the Delphi method to be fair and impartial, as all opinions were considered, which is frequently not the case in committee meetings. That said, participants believed that committee meetings allowed for a greater understanding of others’ opinions. Overall, the application of the Delphi method was shown to be a promising way of determining forest ecosystem management issues.

Effects of forest tent caterpillar defoliation on carbon and water fluxes in a boreal aspen stand

2018 ◽  
Vol 253-254 ◽  
pp. 176-189 ◽  
Author(s):  
Jilmarie J. Stephens ◽  
T. Andrew Black ◽  
Rachhpal S. Jassal ◽  
Zoran Nesic ◽  
Nicholas J. Grant ◽  
...  
Keyword(s):  
Forest Tent Caterpillar ◽  
Water Fluxes ◽  
Tent Caterpillar

Long-Term Effects of Defoliation of Aspen by the Forest Tent Caterpillar

Ecology ◽  
1964 ◽  
Vol 45 (3) ◽  
pp. 630-633 ◽  
Author(s):  
G. B. Churchill ◽  
H. H. John ◽  
D. P. Duncan ◽  
A. C. Hodson
Keyword(s):  
Forest Tent Caterpillar ◽  
Long Term Effects ◽  
Tent Caterpillar

scholarly journals Changes in Nesting Density of Baltimore Orioles (1976-1995) and Other Species in the Dune- Ridge Forest, Delta Marsh, MB: Response to an Outbreak of Forest Tent Caterpillar?

Blue Jay ◽  
2018 ◽  
Vol 76 (3) ◽  
pp. 22-27
Author(s):  
Spencer G. Sealy
Keyword(s):  
Forest Tent Caterpillar ◽  
Delta Marsh ◽  
Nesting Density ◽  
Dune Ridge ◽  
Tent Caterpillar

Changes in Nesting Density of Baltimore Orioles (1976-1995) and Other Species in the Dune- Ridge Forest, Delta Marsh, MB: Response to an Outbreak of Forest Tent Caterpillar?

Prevalence and biology of Furia gastropachae (Zygomycetes: Entomophthorales) in populations of forest tent caterpillar (Lepidoptera: Lasiocampidae)

2003 ◽  
Vol 135 (3) ◽  
pp. 359-378 ◽  
Author(s):  
Melanie J. Filotas ◽  
Ann E. Hajek ◽  
Richard A. Humber
Keyword(s):  
New York ◽  
United States Of America ◽  
Pieris Rapae ◽  
Viral Infections ◽  
Danaus Plexippus ◽  
Malacosoma Disstria ◽  
Forest Tent Caterpillar ◽  
Resting Spore ◽  
Tent Caterpillar ◽  
Marked Tendency

AbstractFuria gastropachaecomb. nov. (= Furia crustosa MacLeod et Tyrrell) has long been associated with declines in populations of the forest tent caterpillar, Malacosoma disstria Hübner; however, its prevalence and impact on host populations have never been documented. We clarify the nomenclature for this species, which has previously been called F. crustosa, and describe the morphology of F. gastropachae isolates from Maryland and New York. Epizootics of F. gastropachae were studied in M. disstria populations in New York and Maryland, United States of America. Prevalence (mean ± SE) of F. gastropachae in late fifth instar larvae in New York was 25.6 ± 7.8% compared with 22.2 ± 11.3% infection by virus and 23.3 ± 8.4% parasitism. In Maryland, F. gastropachae was not found in early instars and its incidence in fourth and fifth instars was 14.5 ± 7.3 and 21.6 ± 17.6%, respectively. Dipteran parasitoids were also important natural enemies with 38.3 ± 3.0 and 17.9 ± 1.4% parasitism in fourth and fifth instars, respectively. Virus was found in fewer than 5% of larvae collected. Furia gastropachae showed a marked tendency toward resting spore production in infected larvae, with 100% of larvae collected in New York and >80% of larvae collected in Maryland producing resting spores, either alone or in combination with conidia. The appearance of cadavers of larvae dying from fungal and viral infections was similar. Of 13 species of Lepidoptera exposed to F. gastropachae conidia in host-range bioassays, only 3.3% of Danaus plexippus (L.) (Lepidoptera: Danaidae), 5.6% of Pieris rapae (L.) (Lepidoptera: Pieridae), and 3.7% of Manduca sexta (L.) (Lepidoptera: Sphingidae) were successfully infected by this fungus.

The Light Reactions of Larvae of the Tent Caterpillars, Malacosoma disstria Hbn., M. americanum (Fab.), and M. pluviale (Dyar). (Lepidoptera: Lasiocampidae)

1953 ◽  
Vol 85 (8) ◽  
pp. 297-310 ◽  
Author(s):  
C. R. Sullivan ◽  
W. G. Wellington
Keyword(s):  
Physical Environment ◽  
Malacosoma Disstria ◽  
General Interest ◽  
Deciduous Trees ◽  
Physical Factors ◽  
Forest Tent Caterpillar ◽  
Field Observations ◽  
Larval Behaviour ◽  
Tent Caterpillars ◽  
Tent Caterpillar

The forest tent caterpillar, Malacosoma disstria Hbn., and the eastern and western tent caterpillars, M. americanum (Fab.) and M. pluviale (Dyar), are common pests of several species of deciduous trees in Canada. All are colonial during the larval stage, but M. disstria differs from the others in one respect: it does not construct a communal tent. This difference in habit merits special consideration in any comparative study of larval behaviour, particularly in one concerned with the effects of physical factors upon the insects, since a tent modifies the effects of the physical environment considerably. Recently, a series of such studies was carried out, and one part of the work consisted of laboratory and field observations on the light reactions of larvae. The results obtained have raised a number of new questions which unfortunately cannot be answered now, hecause two of the species have been difficult to obtain in quantity since 1950. Nevertheless, the findings are presented here without additional delay, since they are of general interest, and other workers may wish to use them.

Identification and behavioral assays of the trail pheromone of the forest tent caterpillar, Malacosoma disstria Hübner (Lepidoptera: Lasiocampidae)

1993 ◽  
Vol 71 (8) ◽  
pp. 1511-1515 ◽  
Author(s):  
T. D. Fitzgerald ◽  
F. X. Webster
Keyword(s):  
Trail Pheromone ◽  
Malacosoma Disstria ◽  
Forest Tent Caterpillar ◽  
Laboratory Studies ◽  
Malacosoma Americanum ◽  
Eastern Tent Caterpillar ◽  
Highly Sensitive ◽  
True Threshold ◽  
Behavioral Assays ◽  
Tent Caterpillar

Behavioral assays show that the steroid 5β-cholestan-3-one, isolated from the abdomen of the larva of the forest tent caterpillar (Malacosoma disstria), constitutes the chemical basis of trail following in this insect. Caterpillars follow artificial trails prepared from solvent dilutions of the compound at rates as low as 10−11 g∙mm−11 of trail, though the true threshold sensitivity is likely to be one or two orders of magnitude lower than this. Fourth-instar caterpillars store an average of 58 ng of the pheromone. Field and laboratory studies indicate that the compound is fully competitive with their authentic trails. The caterpillars are highly sensitive to differences in the concentration of the pheromone, preferring stronger trails to weaker trails. The caterpillars also respond to 5β-cholestane-3,24-dione, a chemical not found in M. disstria but known to be a component of the trail pheromone of the eastern tent caterpillar, Malacosoma americanum.

scholarly journals Forest landscape structure influences the cyclic‐eruptive spatial dynamics of forest tent caterpillar outbreaks

Ecosphere ◽  
2020 ◽  
Vol 11 (8) ◽  
Author(s):  
Louis‐Etienne Robert ◽  
Brian R. Sturtevant ◽  
Daniel Kneeshaw ◽  
Patrick M. A. James ◽  
Marie‐Josée Fortin ◽  
...  
Keyword(s):  
Landscape Structure ◽  
Spatial Dynamics ◽  
Forest Tent Caterpillar ◽  
Forest Landscape ◽  
Tent Caterpillar

Fire Severity and Long-term Ecosystem Biomass Dynamics in Coniferous Boreal Forests of Eastern Canada

Ecosystems ◽  
2006 ◽  
Vol 9 (8) ◽  
pp. 1215-1230 ◽  
Author(s):  
Nicolas Lecomte ◽  
Martin Simard ◽  
Nicole Fenton ◽  
Yves Bergeron
Keyword(s):  
Boreal Forests ◽  
Fire Severity ◽  
Eastern Canada ◽  
Biomass Dynamics
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