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Christy A. Morrissey
University of Saskatchewan
PesticideEcologyImidaclopridNeonicotinoidBiology
69Publications
24H-index
2,422Citations
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Publications 73
Newest
#1Egina Malaj (U of S: University of Saskatchewan)
#2Karsten Liber (U of S: University of Saskatchewan)H-Index: 32
Last. Christy A. Morrissey (U of S: University of Saskatchewan)H-Index: 24
view all 3 authors...
Abstract Agricultural pest control products are a major cause of degradation of water quality and biodiversity loss worldwide. In the Canadian Prairie Pothole Region, the landscape is characterized by millions of ecologically important wetlands, but also large farm sizes and high agrochemical use. Despite the region’s agricultural intensity, the spatial extent of pesticide use and likelihood of pesticides contaminating surface water in this region has been poorly studied. Here, we estimated the ...
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#1Jessica E. Howell (U of S: University of Saskatchewan)
#2Ann E. McKellar (U of S: University of Saskatchewan)
Last. Christy A. Morrissey (U of S: University of Saskatchewan)H-Index: 24
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#1Fredric M. Windsor (University of Exeter)H-Index: 4
#2M. Glória PereiraH-Index: 13
Last. Steve J. Ormerod (Cardiff University)H-Index: 21
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Abstract Legacy organic pollutants persist in freshwater environments, but there is limited understanding of how their trophic transfer and effects vary across riverine ecosystems with different land use, biological communities and food webs. Here, we investigated the trophic magnification of polybrominated diphenyl ethers (PBDEs), polychlorinated biphenyls (PCBs) and a suite of organochlorines (OCs) across nine riverine food webs in contrasting hydrological catchments across South Wales (United...
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#1E.M. Maloney (U of S: University of Saskatchewan)H-Index: 3
#2Hunter Sykes (U of S: University of Saskatchewan)
Last. Karsten Liber (U of S: University of Saskatchewan)H-Index: 32
view all 6 authors...
Acute (96-h) toxicities of 5 systemic insecticides (chlorantraniliprole, cyantraniliprole, flupyradifurone, flubendiamide, and sulfoxaflor) were tested on larval Chironomus dilutus and compared with the neonicotinoid imidacloprid. Three insecticides were less acutely toxic than imidacloprid (2.5-25 times lower). However, chlorantraniliprole and cyantraniliprole were 1.5 to 1.8 times more toxic to C. dilutus. Thus, these ryanodine receptor agonists could pose a higher risk to aquatic insects than...
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#1Gabrielle E. Ruso (U of S: University of Saskatchewan)
#2Christy A. Morrissey (U of S: University of Saskatchewan)H-Index: 24
Last. Timothy D. Jardine (U of S: University of Saskatchewan)H-Index: 26
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#1Ana M. Chará-Serna (UBC: University of British Columbia)H-Index: 6
#2Luis B. Epele (CONICET: National Scientific and Technical Research Council)H-Index: 7
Last. John S. Richardson (UBC: University of British Columbia)H-Index: 44
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Abstract Pesticides are important contributors to the global freshwater biodiversity crisis. Among pesticides, neonicotinoids are the best-selling class of agricultural insecticides and are suspected to represent significant risks to freshwater and terrestrial ecosystems worldwide. Despite growing recognition that neonicotinoid impacts may be modified by the presence of additional stressors, there is limited information about their interactions with other agricultural stressors in freshwater eco...
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#1Shiao-Yu Hong (NPUST: National Pingtung University of Science and Technology)H-Index: 3
#2Christy A. Morrissey (U of S: University of Saskatchewan)H-Index: 24
Last. Yuan-Hsun Sun (NPUST: National Pingtung University of Science and Technology)H-Index: 6
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Abstract Anticoagulant rodenticides (ARs) are known to cause extensive secondary exposure in top predators in Europe and North America, but there remains a paucity of data in Asia. In this study, we collected 221 liver samples of 21 raptor species in Taiwan between 2010 and 2018. Most samples were from rescue organizations, but some free-ranging individuals were from bird-strike prevention measures in airports. ARs were detected in 10 species and more than half of the total samples. Common roden...
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#1Margaret L. Eng (U of S: University of Saskatchewan)H-Index: 9
#2Bridget J. M. Stutchbury (York University)H-Index: 37
Last. Christy A. Morrissey (U of S: University of Saskatchewan)H-Index: 24
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Neonicotinoids are neurotoxic insecticides widely used as seed treatments, but little is known of their effects on migrating birds that forage in agricultural areas. We tracked the migratory movements of imidacloprid-exposed songbirds at a landscape scale using a combination of experimental dosing and automated radio telemetry. Ingestion of field-realistic quantities of imidacloprid (1.2 or 3.9 milligrams per kilogram body mass) by white-crowned sparrows (Zonotrichia leucophrys) during migratory...
4 CitationsSource
#1Michael C. Cavallaro (U of S: University of Saskatchewan)H-Index: 4
#2Anson R. Main (U of S: University of Saskatchewan)H-Index: 4
Last. Christy A. Morrissey (U of S: University of Saskatchewan)H-Index: 24
view all 7 authors...
Abstract Threats to wetland water quality and aquatic insect secondary production in agricultural landscapes are multifaceted and are known to vary spatially and temporally. We designed this study with the aim to disentangle the effects of multiple stressors on emerging aquatic insects from wetlands impacted by intensive agricultural practices and receiving runoff from neonicotinoid-treated canola. In 2013, 2015, 22 semi-permanent wetlands were monitored over two growing seasons (11 different we...
2 CitationsSource
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