Some terrestrial tardigrades from New Brunswick, Canada

1971 ◽  
Vol 49 (3) ◽  
pp. 401-415 ◽  
Author(s):  
C. W. Argue
Keyword(s):  
New Brunswick ◽  
Anatomical Features ◽  
South Central ◽  
A Minor

Twenty-one species of terrestrial tardigrades, of which 11 represent new reports for Canada, are identified from cryptogam hosts from south central New Brunswick. Several new anatomical features of a minor nature are noted.

scholarly journals New range extensions for the Canadian Chironomidae fauna from two urban streams

2017 ◽  
pp. 76-80 ◽  
Author(s):  
Armin Namayandeh ◽  
David V. Beresford
Keyword(s):  
New Brunswick ◽  
Urban Streams ◽  
Previous Record ◽  
South Central

We report on 2 first records of Chironomidae for Ontario, Rheosmittia spinicornis (Brundin, 1956) and Sublettea coffmani (Roback 1975), and confirm a previous record of Odontomesa fulva (Kieffer 1919) from Ontario. Specimens of S. coffmani have been only reported from New Brunswick whereas R. spinicornis has records from northern, western and central provinces and territories. Reports of O. fulva were not con-firmed in Ontario. Here we report its occurrence for the second time in south central Ontario, confirming its occurrence within the province.

Tardigrades from New Brunswick, Canada. 3

1974 ◽  
Vol 52 (7) ◽  
pp. 919-922 ◽  
Author(s):  
C. W. Argue
Keyword(s):  
New Brunswick ◽  
South Central ◽  
Hypsibius Dujardini

Four species of tardigrades, not before reported for Canada, are identified from sites in south central New Brunswick. They are Macrobiotus pullari, Hypsibius (Hypsibius) dujardini, Hypsibius (Diphascon) bullatus, and H. (D.) rugosus.

Tardigrades from New Brunswick, Canada. 2.

1972 ◽  
Vol 50 (1) ◽  
pp. 87-94 ◽  
Author(s):  
C. W. Argue
Keyword(s):  
New Brunswick ◽  
New Variety ◽  
South Central

Seven kinds of tardigrades, not before reported for Canada, are identified from sites in south central New Brunswick. They are Echiniscus (Echiniscus) spiniger, E. (E.) spinuloides, Macrobiotus ambiguus, M. furciger, M. hibernicus, Hypsibius (Diphascon) nodulosus, and H. (D.) pinguis brunsvicensis which is proposed as a new variety. A summary of species and varieties of tardigrades so far known for Canada is given. Markings on the pharyngeal tube of species of Diphascon are discussed.

The Upper Carboniferous Clifton Formation of northern New Brunswick: coal-bearing deposits of a semi-arid alluvial plain

1982 ◽  
Vol 19 (9) ◽  
pp. 1775-1785 ◽  
Author(s):  
Andrew S. Legun ◽  
Brian R. Rust
Keyword(s):  
New Brunswick ◽  
Central Africa ◽  
Plant Litter ◽  
Alluvial Plain ◽  
Common Source ◽  
Fine Grained ◽  
South Central ◽  
Okavango River ◽  
Sand Sheet ◽  
Semi Arid

Two contiguous successions within Member B of the Westphalian Clifton Formation are exposed on the coast of Chaleur Bay east of Bathurst, New Brunswick. The upper succession is dominated by sandstone, and the lower by shale, which encloses isolated channel and lenticular sandstone bodies. Distinctive features of the shale are thin coals, casts of tree trunks, calcareous paleosols, and deep desiccation cracks with calcareous coatings. Markov chain analysis of the shale-dominated succession defines a repetitive sequence of shale, rippled fine-grained sandstone, paleosol, and coal. This sequence is attributed to filling of flood basins followed by emergence and pedogenesis under semi-arid conditions, which prevented thick coal accumulation. The major sandstone bodies are interpreted as channels, associated with lenticular levee, crevasse-splay, or mouth-bar deposits of a semi-arid alluvial plain on which anastomosing channels dominated. The Okavango River of south-central Africa and Cooper's Creek in central Australia are proposed as modern analogues.The upper succession of Member B is characterized by sheet sandstones made up of top-truncated trough and planar cross-stratified units, with abundant plant litter and calcareous intraclasts. The rocks are interpreted as braided-fluvial sand sheet deposits that blanketed the lower succession floodplain. Petrographic and paleocurrent data suggest a common source for both successions. The progradation of the braided sand sheet may reflect a sedimentary response to climate change, tectonic rejuvenation, or a combination of both.

CHARACTERISTICS AND CLASSIFICATION OF NON-CEMENTED SANDY SOILS IN NEW BRUNSWICK

1980 ◽  
Vol 60 (1) ◽  
pp. 71-81 ◽  
Author(s):  
C. WANG ◽  
H. W. REES
Keyword(s):  
New Brunswick ◽  
Sandy Soils ◽  
Classification Systems ◽  
Minor Effect ◽  
Soil Evolution ◽  
Organic C ◽  
Podzolic Soils ◽  
A Minor ◽  
Total Organic C

Forty-nine sandy soils developed in till, outwash, alluvium and marine sands were studied to determine the effect of mode of deposition on soil development and to classify the soils according to the Canadian and U.S. classification systems. Forty-three of the soils met the morphological and chemical criteria of Humo-Ferric Podzols but none of these was a Spodosol because the ratio of pyrophosphate-extractable Fe + Al to clay in the B horizon was below 0.2. Mode of deposition had only a minor effect on soil evolution. However, B horizon development was strongest in the till soils, perhaps because of their somewhat finer texture and greater age. A pronounced maximum of clay occurred in the B horizons of the Podzolic soils; commonly, clay in the B exceeded that in the A and C by a factor of 2–5. A higher pyrophosphate Al/Fe ratio was found associated with soils low in total pyrophosphate Al + Fe and vice versa. It was also found that pyrophosphate Al + Fe was positively correlated with total organic C (r = 0.891).

THE DIAPAUSE AND RELATED PHENOMENA IN GILPINIA POLYTOMA (HARTIG): III. BIOCLIMATIC RELATIONS

1941 ◽  
Vol 19d (11) ◽  
pp. 350-362 ◽  
Author(s):  
M. L. Prebble
Keyword(s):  
New Brunswick ◽  
Eastern North America ◽  
Climatic Data ◽  
Eastern Canada ◽  
Pupal Development ◽  
South Central ◽  
Probable Distribution ◽  
The One ◽  
Moisture Conditions ◽  
Do So

The progress of intracocoon development in relation to temperature and moisture is described for a one-generation and a two-generation area in eastern Canada. In the one-generation area (central Gaspé) the degree of seasonal emergence from the overwintered cocoons can be forecast with considerable accuracy by means of sample analyses during the period of pronymphal and early pupal development. This is possible since few individuals that have not initiated development by late June do so later in the summer, even though environmental conditions are quite favourable. The technique fails in a two-generation area (south central New Brunswick) because members of the overwintered population may continue to respond to favourable temperature and moisture conditions throughout the entire season.On the basis of biologic and climatic data the area occupied by the European spruce sawfly in eastern North America is divided into zones representing the probable distribution of one-, two-, and three-generation areas; intermediate transitional zones are also indicated.

The ecological consequences of Buffel Grass Cenchrus ciliaris establishment within remnant vegetation of Queensland

2002 ◽  
Vol 8 (2) ◽  
pp. 99 ◽  
Author(s):  
Andrew J. Franks
Keyword(s):  
Ground Cover ◽  
Woody Species ◽  
Minor Role ◽  
Grass Cover ◽  
Cenchrus Ciliaris ◽  
Buffel Grass ◽  
Remnant Vegetation ◽  
South Central ◽  
Relative Cover ◽  
A Minor

The effects of Buffel Grass Cenchrus ciliaris presence and dominance in 78 Poplar Box Eucalyptus populnea woodland remnants of south central Queensland are documented, Buffel Grass was recorded from the majority of sites sampled, As the relative cover of Buffel Grass increased at both the quadrat and site level, the number of native ground cover species declined significantly. Most commonly recorded ground cover species displayed significant changes in frequency as Buffel Grass cover increased, Only two species increased with increased Buffel Grass cover: Desert Goosefoot Chenopodium desertorum subsp. anidiophyllum and Galvanised Burr Sclerolaena birchii. The average cover of Buffel Grass decreased significantly from the edge of remnants towards the core areas. The foliage projected cover of the sub-canopy layers appeared to be an important factor affecting the relative cover of Buffel Grass at any one site indicating that shading and competition with the woody layers are important determinants in the structure and composition of the ground cover layer. A number of sub-canopy species were found to produce leachates that were capable of significantly reducing the germination or growth of Buffel Grass seeds, alluding that allelopathy may play a minor role in determining ground cover species assemblages. However, this result can only be interpreted conservatively in relation to its ecological relevance with effects related to competition with overstorey woody species being of greater importance. This study quantifies the long observed effect that the exotic perennial Buffel Grass excludes other ground cover species, which may have detrimental ramifications on the functioning of remnant native vegetation over much of the state. With the recent introduction of regulations controlling broad scale tree clearing on both freehold and leasehold lands in Queensland, it is now important to identify a range of issues pertaining to the effective on ground management of remnant vegetation located outside the existing nature refuge network.

Multistage growth and reworking of the Palaeoproterozoic crust in the Bergslagen area, southern Sweden: evidence from U–Pb geochronology

2006 ◽  
Vol 143 (5) ◽  
pp. 679-697 ◽  
Author(s):  
ULF B. ANDERSSON ◽  
KARIN HÖGDAHL ◽  
HÅKAN SJÖSTRÖM ◽  
STEFAN BERGMAN
Keyword(s):  
Granulite Facies ◽  
Amphibolite Facies ◽  
Thermal Activity ◽  
The South ◽  
Magmatic Arc ◽  
Metasedimentary Rocks ◽  
The North ◽  
South Central ◽  
Augen Gneiss ◽  
A Minor

The Svecofennian Domain of the Fennoscandian Shield constitutes a considerable volume of Palaeoproterozoic crustal growth, 2.1–1.86 Ga ago, in between the Archaean craton in the NE and the 1.85–1.65 Ga Transscandinavian Igneous Belt (TIB) in the south and west. The Bergslagen area is a classical ore province located in the southwestern part of the Svecofennian Domain of south-central Sweden. Its northern part is dominated by volcanic and plutonic rocks of a magmatic arc with continental affinity, while the SE part is made up by a sedimentary basin. The Bergslagen area shows a metamorphic zonation from lower to middle amphibolite facies in the north to upper amphibolite facies and locally granulite facies in the south; a small greenschist area exists in the west. Identifying the age spectra of inherited components, magmatic crystallization, as well as metamorphic episodes, provide important constraints on the geodynamic evolution of this centrally located piece of the Shield.U–Pb zircon SIMS data presented in this paper complement the previous, regionally scattered TIMS data from this area. Magmatic zircons from two felsic metavolcanic rocks and two amphibolites (metagabbros) yield 1888±12, 1892±7 and 1887±5, 1895±5 Ma, respectively; i.e. within the 1.91–1.86 Ga range previously obtained for Early Svecofennian magmatism in Bergslagen. An augen gneiss from southern Bergslagen, assigned to the earliest TIB generation, yield an intrusive age of 1855±6 Ma. Metamorphic monazites from the same rock indicate that deformation and elevated thermal activity prevailed 1.83–1.82 Ga ago (TIMS). Metamorphic zircons in high-grade metasedimentary rocks from the south and west yield ages of 1793±5 and 1804±10 Ma, in accordance with ages for regional peak metamorphism and migmatite formation found elsewhere in the southern Svecofennian province of Sweden. More importantly, a few zircon crystals and overgrowths in rocks from the north indicate an early metamorphic episode at c. 1.87 Ga, indicating that Bergslagen has experienced two major metamorphic events. Detrital and inherited zircons span the range 2.78–1.90 Ga, with an apparent gap at 2.45–2.1 Ga, which further emphasize previous observations of a major juvenile (<2.1 Ga) and a minor Archaean provenance. This, and in particular the 1.94–1.91 Ga crystals present in the c. 1.89 Ga amphibolites, support the suggestion of a former Palaeoproterozoic pre-1.91 Ga crust in the Bergslagen area.

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