bluuebunny/crossref_metadata_2025_split huggingface dataset:
INSECTS IN THERMAL SPRINGS
Authors: Pritchard Gordon 
Published: April 2011

AbstractThermal springs are characterized by year-round high temperatures and a total-dissolved-solids concentration that is generally higher than that of surface waters. Insects appear to encounter few constraints from the water chemistry of most thermal springs, but considerable constraint from the high water temperature. Indeed, because no insect lives above 50 °C and very few above 40 °C, few thermal springs offer favorable conditions for insects in the actual boil itself. Thermal spring insects live in the stream at some distance from the source, and they may be defined as living in habitats having temperature regimens that are influenced by geothermy in the sense that they are warmer than they otherwise would be. An annual mean water temperature that is 5 °C above the annual mean air temperature of the region can be used to define the downstream limit of geothermal influence.Thermal springs around the world have similar insect faunas; only four orders (Diptera, Coleoptera, Hemiptera, Odonata) are commonly represented, and each of these only by a handful of genera. Furthermore, the fauna of any one thermal spring is characterized by very few species, and the higher the temperature the lower the species richness. Both temperature and water chemistry may exclude certain species, and even whole orders, from thermal springs, these factors acting either directly, alone or in concert, or indirectly through competitive interactions. Even moderately warmed systems can significantly affect insect growth rates, and seasonal regulation of adult emergence through diapause is a common strategy of temperate-zone thermal spring insects.Thermal springs present many advantages to the ecologist, such as long-term habitat constancy, temperature stability, and taxonomic simplicity. They provide field laboratories for the study of temperature-related phenomena as well as the opportunity to explore a range of questions in biogeography and evolutionary biology. The challenge is to form the questions and select the systems critically.
AQUATIC COLEOPTERA OF SPRINGS IN CANADA
Authors: Roughley R.E. , Larson D.J. 
Published: April 2011

AbstractThe habitat preferences of each of the 663 species of aquatic Coleoptera known from Canada and Alaska were categorized as lentic, lotic, spring-inhabiting, other, or unknown. Most species were assigned to a single habitat type although some occur in more than one habitat. The distribution of species among these habitat types is as follows: lentic, 61%; lotic, 23%; springs, 8%; other, <1%, unknown, 8%. The 63 spring-inhabiting species are distributed among the families Dytiscidae (38 species), Hydrophilidae (nine), Hydraenidae (eight), Chrysomelidae (subfamily Donaciinae) (six), Haliplidae (one), and Dryopidae (one). The diversity of these families in springs only approximately parallels their diversity in the total fauna. Several relatively diverse families (Gyrinidae, Scirtidae, and Curculionidae) are absent from springs as are some predominantly lotic families (Amphizoidae, Elmidae, and Psephenidae). About half the spring species are western (occurring in Manitoba and west), about a quarter are eastern, and a quarter are transcontinental. Most of these spring species are known from the conterminous United States and it is suggested that spring habitats within Canada are being colonized slowly from southern refugia.The habitat affinities of spring-inhabiting Dytiscidae are examined in detail. Of the 260 species occurring in Canada, 38 species occur in springs and represent about 60% of all beetle species in Canadian springs. The spring fauna of dytiscids comprises four elements: nine (24%) inhabit springs only, 11 (29%) are lotic species that also occur in springs, 12 (31%) are species that use a broad range of habitats, and six (16%) are species known otherwise only from lentic habitats. The dytiscid fauna of springs is a heterogeneous assemblage derived from many separate phylogenetic elements.
A COMPARISON OF THE SPRING-INHABITING GENERA OF CHIRONOMIDAE FROM THE HOLARCTIC WITH THOSE FROM NATURAL AND MANMADE SPRINGS IN LABRADOR, CANADA
Authors: Colbo M.H. 
Published: April 2011

AbstractFrom the literature 70 of the 212 chironomid genera known in the immature stage from the Holarctic Region are considered in this paper to be inhabitants of springs or seeps, or both. Three more are known only from adults collected at springs and seeps so that 73 out of 235 genera recognized from the Holarctic appear to be associated with these habitats. Literature records of distribution suggest that 65 of the 73 occur in northeastern North America. Collections from natural and manmade springs and seeps in Labrador yielded 45 genera; 40 of these genera belong to the set of 65 genera noted above. The other five are likely spill-overs into springs and seeps from adjacent habitats. Communities from manmade springs and seeps originating from the earth dykes and dams at Churchill Falls were compared with natural springs and seeps there and in Goose Bay, Labrador. Chironomid communities were similar at the generic level in both man-made and natural spring–seep habitats.
ARTHROPODS OF SPRINGS, WITH PARTICULAR REFERENCE TO CANADA: SYNTHESIS AND NEEDS FOR RESEARCH
Authors: Danks H.V. , Williams D. Dudley 
Published: April 2011

AbstractSprings include a great variety of habitats, because many possible geological and ecological conditions intersect in any given spring.Available information on the arthropod fauna shows that springs contain a limited number of species of diverse origins, including groundwater, stream, and water-film inhabitants. There is a substantial number of spring-specialist species, many of them in distinctive genera, reflecting many independent invasions of spring habitats by various groups and subgroups of aquatic arthropods. Most of this diversity is present in cold water springs, though smaller numbers of distinctive elements occur in hot or in saline springs. The specialists of coldwater springs tend to show adaptations such as cold stenothermy and limited dispersal, but different species possess different suites of adaptations to the habitat, reflecting their evolutionary history and biology.Faunal differences among springs result from geographical differences (many species, though not as many genera, differ between eastern and western Canada), but within a given region reflect the variety of habitats and microhabitats that exists. Such variety means that except in very broad terms it is not possible to establish workable “definitions” for the range of spring types. Rather, we recommend that biologists adopt a few key descriptors, based on source geometry, water supply, temperature, chemistry, and persistence, to provide useful information about the sites in which they collect. The term “spring” should be used conservatively, to apply only to the area immediately around the point of groundwater issue, because conditions change rapidly farther away from this point.Some needs for the inventory (and protection) of springs and for more extensive sampling are summarized. Further taxonomic studies are required in several characteristic groups. Ecological work on the specialized species confined to springs is likely to be especially instructive.
DIVERSITY OF SOIL ARTHROPODS IN CANADA: SYSTEMATIC AND ECOLOGICAL PROBLEMS
Authors: Behan-Pelletier Valerie M. 
Published: April 2011

AbstractData on diversity are fundamental to our understanding of both natural and disturbed ecosystems. Yet, despite their real and potential importance, knowledge of the diversity of non-pterygote soil arthropods in Canada still is very incomplete. This is illustrated with information on diversity from nine non-pterygote arthropod taxa: Tardigrada, Chilopoda, Diplopoda, Symphyla, Pauropoda, Protura, Collembola, Pseudoscorpionida, and Oribatida, and faunal lists are given for six of these taxa. Although valuable family and generic keys have been published recently, few monographic works or user-friendly keys to species are available. Autecological information essential to explaining the functional role of soil arthropods remains inadequate. Fortunately, the needs of other disciplines and issues are causing a change. For example, current ecological research recognizes that the roles of soil arthropods in decomposition, nutrient cycling, and soil formation are more complex than previously supposed, palaeoecologists require new or corroborating data to interpret their fossil assemblages, and issues such as agroecosystem management, environmental indicators, and global change require a more thorough knowledge of soil communities. Researchers in these areas face poor data on diversity based on inadequate systematics, which limit their understanding of the composition and organisation of soil arthropod communities. This inadequacy presents both a challenge and an opportunity to soil arthropod systematists and ecologists.
PATTERNS OF DIVERSITY IN THE CANADIAN INSECT FAUNA
Authors: Danks H.V. 
Published: April 2011

AbstractThe diversity of the Canadian insect fauna decreases and its composition (at all taxonomic levels) changes as climates become progressively more harsh toward the north. This climatic trend dominates patterns of diversity, but many other factors interact to produce the observed patterns. In the arctic, species richness is greatest in the west. Farther south, overall species richness is greatest in the west (especially British Columbia), associated with coastal and cordilleran habitats, and to a somewhat smaller degree in the southeast (especially Ontario), associated with deciduous forests and particularly with transitional forests which occupy a large area of southeastern Canada. However, certain taxa are better represented in the west or in the east, depending on present-day habitats and on historical factors. These conclusions, based chiefly on a sample of taxa of different types, are possible only because basic systematic work has been carried out to distinguish and map the species. Preliminary data on numerical patterns, such as the numbers of species relative to different potential resources such as host plants in different zones, tend to suggest that the occurrence of species in the north may depend so heavily on climatic factors that potential resources are not fully exploited and the effects of interspecific interactions on diversity are reduced.
WEEVILS AND PLANTS: PHYLOGENETIC VERSUS ECOLOGICAL MEDIATION OF EVOLUTION OF HOST PLANT ASSOCIATIONS IN CURCULIONINAE (COLEOPTERA: CURCULIONIDAE)
Authors: Anderson Robert S. 
Published: April 2011

AbstractA great proportion of biodiversity is accounted for by organisms, particularly insects, intimately associated with plants. Knowing whether ecological or phylogenetic factors chiefly influence the evolution of host plant associations is essential to understanding speciation in, and therefore factors influencing diversity of, phytophagous insects. Through examination of known host plant associations in Curculioninae and comparison with available reconstructed phylogenetic relationships of certain taxa of Curculioninae, little, if any, evidence for cospeciation (parallel cladogenesis) is found. In curculionine taxa where sufficient host plant and/or phylogenetic data are available, weevil species are narrowly to broadly oligophagous; a number of related weevil species are associated with a single host plant species; many weevil genera have host plant ranges spanning distantly related plant taxa; and available weevil reconstructed phylogenies are not concordant with plant relationships. Rather, for at least some weevil taxa, evolution appears to be mediated by one or more of a variety of strictly ecological factors, particularly habitat associations. General applications of these results include biological control, pollination biology, conservation and restoration biology, and use of patterns in insect – host plant associations to resolve problems in plant classification.
EVOLUTION OF LIMOTETTIX SAHLBERG (HOMOPTERA: CICADELLIDAE) IN PEATLANDS, WITH DESCRIPTIONS OF NEW TAXA
Authors: Hamilton K.G.A. 
Published: April 2011

AbstractThe world species of Limotettix Sahlberg are reviewed, and 13 new Nearctic species are described: in the typical subgenus — L. conservatus; in the new subgenus Dryola — L. elegans, L. minuendus; in subgenus Neodrylix — L. urnura; in subgenus Ophiolix — L. nigristriatus, L. pseudosphagneticus, L. xanthus; and in subgenus Scleroracus — L. brooksi, L. medleri, L. obesura, L. scudderi, L. strictus, and L. zacki. Limotettix (L.) emeljanovi is proposed to replace L. luteolus Emel'janov, 1962, nec L. (Scleroracus) luteolus (Sleesman, 1930). The 80 known world species are arranged phylogenetically. From this analysis the genus evidently evolved in the New World from swale and fen inhabiting ancestors that fed on spike-rush. Their bog-inhabiting descendents fed on various rushes and sedges, but apomorphic lineages transferred to ericaceous plants. Adaptation to ericaceous plants permitted invasion of drier habitats, with subsequent radiation on other semiwoody plants, principally Asteraceae and Symphoricarpos.
THE BEETLE FAUNA OF A MATURE SPRUCE–SPHAGNUM BOG, ALGONQUIN PARK, ONTARIO; ECOLOGICAL IMPLICATIONS OF THE SPECIES COMPOSITION
Authors: Runtz M.W.P. , Peck Stewart B. 
Published: April 2011

AbstractThe beetle (Coleoptera) fauna of a black spruce [Picea mariana (Mill.) BSP] – tamarack [Larix laricina (DuRoi) K. Koch] – Sphagnum bog in Algonquin Provincial Park, Ontario, was sampled from early June to mid-August with yellow pan traps and emergence traps. The yield was 5734 beetles, in 30 families. Ptiliidae was the most numerically abundant and Staphylinidae was the most taxonomically diverse. Carabidae was second in diversity and third in numerical abundance. The abundance and ecological implications of some individual species are discussed. Few of the species are bog-specific. The faunal composition suggests that the bog is in a late-succession phase and that most of the beetle species are derived from adjacent habitats.
TERRESTRIAL ARTHROPODS OF CANADIAN PEATLANDS: SYNOPSIS OF PAN TRAP COLLECTIONS AT FOUR SOUTHERN ONTARIO PEATLANDS
Authors: Blades David C.A. , Marshall Stephen A. 
Published: April 2011

AbstractThis report is a synopsis of the terrestrial arthropod faunas collected from four peatlands in southern Ontario. The peatlands surveyed were the Wylde Lake bog (43°55′N, 80°30′W), Crieff fen (43°25′N, 80°07′W), Oliver bog (43°20′N, 80°16′W), and the Wainfleet bog (42°55′N, 79°17′W). Arthropods were collected in yellow pan traps (aluminum pan traps at Wainfleet) during the period May 1987 to June 1988 (including the period of snow cover from December to March). A total of 33 029 specimens were removed from the pan trap samples and of these 17 173 individuals were assigned to species. Between 603 and 870 species of arthropods were identified from each site. Collections from each site were compared using taxonomic and ecological groupings (based on feeding behaviour and habitat preference) of species. Sorensen's Index of Similarity was used to compare the overlap of species among sites. The Hymenoptera, Diptera, Coleoptera, and Araneae were the most species-rich orders collected at each site. More species preferring peatlands were collected at each of the three undisturbed peatlands (Wylde L., Crieff, and Oliver) than at the mined bog, Wainfleet. Species not usually associated with peatlands were more numerous in the Wainfleet collection than in collections from the undisturbed sites. It is concluded that grouping of species by habitat preference is a useful technique for assessing habitat disturbance.
FORMULATION OF ENTOMOPATHOGENS FOR THE CONTROL OF GRASSHOPPERS AND LOCUSTS
Authors: Moore D. , Caudwell R.W. 
Published: April 2011

AbstractSuccessful development of a biological pesticide requires attention not only to the biological agent, but also to formulation, application, and the biology of the pest–pathogen interaction in the field. Emphasis in our review is given to fungi, Metarhizium spp. and Beauveria bassiana (Balsamo) Vuillemin, as the most suitable agents, and oil-based ULV formulations or baits as the most promising application techniques for use with locusts and grasshoppers. The efficacy of the pathogen isolate must be maximized; selection is aimed at those that are suitably virulent, specific, and well adapted to the relevant environmental conditions. Opportunities exist for manipulation of the characteristics of the isolate by genetic means and by developments in culturing techniques. Formulation requirements are stability during storage and the ability to carry the active ingredient successfully to the target insect at application. Likely storage methods for fungi would be as dry conidia, perhaps with clay diluents, or in oils; the characteristics of both are briefly discussed. At application, efficacy of dose transfer and protection of the biological agent against environmental constraints such as UV radiation are needed. Baits have advantages in terms of dose transfer but logistical problems associated with the bulkiness of the carrier remain. Technological advances, including those that offer the prospect of carrier production in situ from dense precursors, and better knowledge of feeding behaviour have improved the prospects for baits. Multi-disciplinary research reducing dependency on the biological agent and exploiting formulation chemistry and application technology is required in developing biological pesticides.
METHODS OF APPLICATION OF MICROBIAL PESTICIDE FORMULATIONS FOR THE CONTROL OF GRASSHOPPERS AND LOCUSTS
Authors: Bateman Roy 
Published: April 2011

AbstractThe use of chemical insecticides, especially as ultra low volume (ULV) formulations, against locusts and grasshoppers will continue for the foreseeable future; therefore application techniques for microbial agents should be as compatible as possible with existing practice. Low volume and ULV spraying of deuteromycete conidia in oil-based formulations have produced very promising acridid control results in the field, although baiting, dusting, and hydraulic application techniques have also been tested for a wide range of pathogens.The key problems for further research and development appear to be the logistics and supply of consistently reliable formulations for application on a large scale, and the determination of mechanisms for effective dose transfer in the field. The application of suspended particulate matter can present special problems with rotary and other atomizers.
ENTOMOPOXVIRUSES ASSOCIATED WITH GRASSHOPPERS AND LOCUSTS: BIOCHEMICAL CHARACTERIZATION
Authors: Erlandson M.A. , Streett D.A. 
Published: April 2011

AbstractEntomopoxviruses (EPVs) are large DNA viruses with structural similarities to vertebrate poxviruses. EPV virions are occluded in large (3–15 μm in diameter) proteinaceous occlusion bodies (OBs). To date, EPVs are reported from 15 species of grasshoppers and locusts. The current information on the biochemical characterization of these EPVs is summarized in our review. The DNA genomes of grasshopper and locust EPVs analysed to date have a G+C ratio of approximately 18.5% and genome size estimates generated by various methods range from 180 to 194 kilobase pairs (kbp). Restriction endonuclease enzyme analysis of a number of grasshopper and locust EPV DNAs shows the virus isolates to be distinct and the technique will be useful in identifying virus isolates. The structural proteins of certain grasshopper EPVs have also been analysed. Forty to 50 polypeptides ranging in molecular weight from 12 to 200 kilodaltons (kDa) have been detected by SDS-PAGE analysis of virions released from OBs and the polypeptide profiles are distinct for many of the virus isolates. The proteinaceous matrix of the OB of EPVs contains one predominant protein referred to as spheroidin. The spheroidin protein from most grasshopper EPVs is approximately the same molecular weight, 107 kDa, when analysed by SDS-PAGE. As with other groups of occluded insect viruses, grasshopper EPVs have a protease activity associated with OBs derived from infected insects. The possible role of this protease activity in the infection cycle is discussed. Finally, the role of various molecular techniques for the detection and identification of EPV infections in laboratory and field populations of grasshoppers and locusts is discussed. The development of EPV-specific monoclonal antibodies and DNA hybridization probes for the detection of virus infections is reviewed. As well, the possible use of polymerase chain reaction and randomly amplified polymorphic DNA fingerprinting techniques for the detection and identification of EPV infections is discussed.
The Comparative Internal Larval Anatomy of Sawflies (Hymenoptera: Symphyta)
Authors: Maxwell Doreen E. 
Published: April 2011

AbstractExamination of 132 recognized species of sawflies (Hymenoptera: Symphyta) from America, Europe, Africa, and Australia, has demonstrated the value of internal anatomical larval detail as a taxonomic tool and an indicator of phylogenetic relationship. Two characters, the salivary glands and Malpighian tubules, proved of major importance. The salivary glands fall into three main categories, narrow squared ducts and incorporated gland cells (the Orthandria with the exception of the Xyelidae), narrow ducts and sheathlike gland cells (the Xyelidae), and either increased cell numbers and narrow branching ducts or expanded ducts (the Tenthredinoidea). Three divisions of the Tenthredinidae are suggested, viz. the Selandriinae-Dolerinae-Athaliinae-Lycaotinae, the Nematinae, and the Blennocampinae-Allantinae-Heterarthrinae-Tenthredininae, corresponding to Malpighian tubule groupings of primitive, intermediate-advanced, and advanced. Character trends are discussed in the light of existing adult arrangements (Ross and Benson), and external larval (Yuasa). The survey emphasizes the need of a revision of family and subfamily limits. Where identification is difficult, internal anatomy is of use in determination to genus and species as well as to family and subfamily. The frequency of parallel evolution does not affect the use of certain characters indicative of progressive change within a group.
Recherches sur la Biologie et la Dynamique des Populations Naturelles d'Archips argyrospilus(Wlk.) (Lépidoptères: Tortricidae) dans le Sud-ouest du Québec
Authors: Paradis Rodolphe-O. , LeRoux E. J. 
Published: April 2011

RésuméDes recherches bio-écologiques ont été en cours de 1956 à 1963 surArchips argyrospilus(Wlk.), tortricidé qui infeste périodiquement les pommiers dans le sud-ouest du Québec.Le cycle évolutif complet, tel que déterminé, révèle que l'espèce est univoltine et passe l'hiver au stade d'œufs. L'éclosion larvaire prend place vers le milieu de mai et présente un synchronisme évident avec les premiers stades phénologiques du pommier. La nymphose débute vers la mi-juin, tandis que les adultes éclosent jusqu'au 20 juillet.Les études écologiques, constituant une des premières utilisations des 'tables de survie' en relation avec les insectes des cultures, portent sur sept générations successives qui s'intègrent dans la durée complète d'une pullulation. Le taux annuel de mortalité, chez les populations d'A.argyrospilus, varie de 91.3 à 99.7 pour cent et résulte de l'action conjuguée de nombreux facteurs biotiques et abiotiques. Les mouvements de progression et de régression de la présente pullulation ont cependant été réglés, d'une part, par les migrations d'adultes, conditionnées par l'environnement et, d'autre part, par l'action des oiseaux et du parasiteItoplectis conquisitor(Say) sur la survie des chrysalides, facteurs trouvés dépendants de la densité de l'hÔte.