Laura L. Timms
McGill University
Publications 10
#1Laura L. Timms (McGill University)H-Index: 7
#2Marla D. Schwarzfeld (U of A: University of Alberta)H-Index: 4
Last.Ilari E. Sääksjärvi (UTU: University of Turku)H-Index: 14
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While the diversity of most taxa increases from temperate to tropical regions, the parasitoid wasp family Ichneumonidae has often been cited as an example of an anomalous diversity pattern with their highest diversity at mid-latitudes. A rich body of literature has attempted to explain this pattern and provide hypothesised mechanisms, and recent studies have suggested that the pattern may result from biases in the data. Previous studies of patterns in ichneumonid diversity have mined catalogue d...
10 CitationsSource
#1Laura L. Timms (McGill University)H-Index: 7
#2Andrew Bennett (McGill University)H-Index: 2
Last.Terry A. Wheeler (McGill University)H-Index: 13
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Arctic ecosystems are fragile, and are particularly sensitive to the pressures of climate change. Both average temperature and precipitation have increased over the past five decades on Ellesmere Island, Nunavut, Canada in the high Arctic. Altered growth forms and increased biomass in dominant plant species on Ellesmere Island have been observed concurrent with the changing climate, but shifts in the diversity or rank abundance of plant and bird species have not been detected. Changes in diversi...
14 CitationsSource
#1Kathleen R. Aikens (McGill University)H-Index: 3
#2Laura L. Timms (McGill University)H-Index: 7
Last.Christopher M. Buddle (McGill University)H-Index: 25
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The forest canopy offers a vertical gradient across which variation in predation pressure implies variation in refuge quality for arthropods. Direct and indirect experimental approaches were combined to assess whether canopy strata differ in ability to offer refuge to various arthropod groups. Vertical heterogeneity in impact of avian predators was quantified using exclosure cages in the understory, lower, mid, and upper canopy of a north-temperate deciduous forest near Montreal, Quebec. Bait tr...
12 CitationsSource
#1Laura L. Timms (McGill University)H-Index: 7
#2Joseph J. Bowden (McGill University)H-Index: 10
Last.Christopher M. Buddle (McGill University)H-Index: 25
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Taxonomic sufficiency, or the suitability of substituting higher level taxonomic designations as response variables in community ecology analy- ses, is important in biodiversity studies from practical and fundamental perspec- tives. While there are many studies of taxonomic sufficiency in aquatic systems, there are few studies with terrestrial arthropods that examine the effects of tax- onomic resolution on the interpretation of multivariate community data. 2. We analysed data sets from three ma...
41 CitationsSource
#1Laura L. Timms (McGill University)H-Index: 7
#2Steven C. Walker (UdeM: Université de Montréal)H-Index: 10
Last.Sandy M. Smith (U of T: University of Toronto)H-Index: 23
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The gypsy moth is considered one of the most harmful invasive forest insects in North America. It has been suggested that gypsy moth may indirectly impact native caterpillar communities via shared parasitoids. However, the impact of gypsy moth on forest insect food webs in general remains unstudied. Here we assess such potential impacts by surveying forest insect food webs in Ontario, Canada. We systematically collected caterpillars using burlap bands at sites with and without histories of gypsy...
10 CitationsSource
#1Laura L. Timms (U of T: University of Toronto)H-Index: 7
#2Sandy M. Smith (U of T: University of Toronto)H-Index: 23
Little research has addressed the impacts of invasive-species establishment on native forest insect communities. Such information is lacking even for gypsy moth, Lymantria dispar (L.) (Lepidoptera: Erebidae), the most thoroughly studied invasive forest insect. We investigated the ecological impacts of gypsy moth on native species at sites in north-central Ontario, Canada, with and without significant histories of gypsy moth defoliation over a 2-year period. Patterns in native forest caterpillar ...
4 CitationsSource
#1Laura L. TimmsH-Index: 7
3 Citations
#1Marc Kenis (CABI)H-Index: 33
#2Marie-Anne Auger-Rozenberg (INRA: Institut national de la recherche agronomique)H-Index: 15
Last.Carlos Lopez-Vaamonde (INRA: Institut national de la recherche agronomique)H-Index: 25
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A literature survey identified 403 primary research publications that investigated the ecological effects of invasive alien insects and/or the mechanisms underlying these effects. The majority of these studies were published in the last 8 years and nearly two-thirds were carried out in North America. These publications concerned 72 invasive insect species, of which two ant species, Solenopsis invicta and Linepithema humile, accounted for 18% and 14% of the studies, respectively. Most publication...
371 CitationsSource
#1Laura L. Timms (CFS: Canadian Forest Service)H-Index: 7
#2Sandy M. Smith (CFS: Canadian Forest Service)H-Index: 23
Last.Peter de Groot (CFS: Canadian Forest Service)H-Index: 21
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1 The emerald ash borer Agrilus planipennis Fairmaire (Coleoptera: Buprestidae) is a serious exotic pest of ash trees (Fraxinus spp.) in North America, and is responsible for the deaths of millions of trees in Ontario and Michigan. One of the greatest challenges facing the successful management of the pest is the ability to accurately detect its presence in a tree. 2 Observations were made on A. planipennis larval feeding galleries found within 65 young, green-ash trees cut from plantations in E...
43 CitationsSource