Critical loads of acidity were estimated for upland forests in Eastern Canada using the steady-state Simple Mass Balance (SMB) Model. A consistent methodology was applied to the entire region, although critical loads were estimated separately for the Atlantic provinces (New Brunswick, Nova Scotia, Prince Edward Island and Newfoundland), Quebec and Ontario using different data sources. In this project, critical load estimates and steady-state exceedance values did not include the effect of forest fire and forest harvesting, which could have a considerable impact on critical loads in Eastern Canada. The observed soil pH -base saturation relationship for forest soils indicated that the constants used into the calculation of alkalinity leaching should be set to 10 (M/M) for the molar Bc/Al ratio in soil leachate and 10 9 (mol L −1 ) 2 for the gibbsite dissolution constant. The areaweighted median critical load for each province varied between 519 (Quebec) and 2063 eq ha −1 y −1 (Prince Edward Island), with a median critical load value for Eastern Canada of 559 eq ha −1 y −1 . It is estimated that approximately 52% of the mapped area is exceeded in terms of acidity according to the 1994-1998 average total (wet + dry) atmospheric deposition. Greatest exceedances occurred in Ontario and Quebec and in the south of Nova Scotia, due to low critical loads and high loads of acid deposition.

Forty-four species of Staphylininae are newly reported from New Brunswick, bringing the total number of species known from the province to 126. Quedius criddlei (Casey) is reported for the first time from Quebec. Bisnius cephalotes (Gravenhorst) is removed from the faunal list of New Brunswick due to a lack of supporting voucher specimens. Additional locality data are presented for seven species either recently recorded from the province or with few previous records and little habitat data. We provide the first documented records of Atrecus americanus (Casey), Quedius erythrogaster Mannerheim, Quedius labradorensis labradorensis Smetana, Quedius plagiatus (Mannerheim), and Neobisnius terminalis (LeConte) from New Brunswick. Collection and habitat data are presented and discussed for all species.

More than 1180 non-native species, mostly of Palaearctic origin, have been recorded from the boreal zone of Canada, with the highest diversity on the island of Newfoundland and in the southern boreal zone of Ontario and Quebec. The non-native biota of the boreal zone (and of Canada in general) is poorly known in terms of species composition and distribution. A large proportion of species are associated with disturbed anthropogenic habitats such as urban areas, agricultural landscapes, transportation and communication corridors, and industrial developments. Natural habitats in the boreal zone have a high degree of resistance to invasion compared with those of other Canadian zones, likely owing to harsh climates, low light levels, poor soil nutrient availability, low soil pH, low productivity, and dense covering of the ground by plants, especially bryophytes. Of the relatively few non-native species that have successfully colonized the boreal zone, many decline greatly in abundance after a few years, suggesting biotic resilience. To date the boreal zone has shown the least resistance and resilience to large vertebrates (moose and white-tailed deer) translocated to islands, diseases of vertebrates, and earthworms. In general, the ecological impacts of non-native species on the boreal zone have been poorly studied, and there are few examples where such impacts are evident. Likewise, there has been little attempt to quantify the economic impacts of non-native species in either the boreal zone or in Canada as a whole. In the few cases where management measures have been implemented for highly destructive non-native species, results have been somewhat successful, especially where classical biological control measures have been implemented against insects on trees. Chemical and mechanical management measures have had only limited success in localized situations. Management resources are most effectively applied to reducing the risk of introduction. The risk to the boreal zone posed by future new non-native species is increasing with the warming climate and the fast and direct transport of goods into the boreal zone from points of origin. Five recommendations are provided to address recognized gaps concerning non-native species.Résumé : On a enregistré plus de 1180 espèces non indigènes, surtout d'origine paléarctique, dans la zone de la forêt boréale du Canada, dont la plus grande diversité se retrouve sur l'île de Terre-Neuve et dans la zone boréale méridionale de l'Ontario et du Québec. Le biote non indigène de la zone boréale (et du Canada en général) est mal connu en ce qui concerne sa composition et sa distribution. Une forte proportion des espèces est associée à des habitats perturbés par l'homme comme les milieux urbains, les paysages agricoles, les corridors de communication et de transport ainsi que les développements industriels. Les habitats naturels de la zone boréale montrent un fort degré de résistance à l'invasion, comparativement à ceux d'autres zones du Canada, vraisemblablement à cause des climats rigou...

Dineutus assimilis Kirby and Dineutus discolor Aubé of the Family Gyrinidae are newly reported from New Brunswick, Canada. Four species of Carabidae, Agonum (Agonum) piceolum (LeConte), Bembidion (Pseudoperyphus) rufotinctum Chaudoir, Harpalus (Harpalus) opacipennis (Haldeman), and Pterostichus (Melanius) castor Goulet & Bousquet are newly reported from New Brunswick and the Maritime provinces, and one species of Dytiscidae, Liodessus noviaffinis Miller, is newly recorded for the province. Collection, habitat data, and distribution maps are presented for each species.