Morphological Variation of Codium fragile (Chlorophyta) in Eastern Canada

2002 ◽  
Vol 45 (5) ◽  
Author(s):  
C. B. Hubbard ◽  
D. J. Garbary
Keyword(s):  
Morphological Variation ◽  
Eastern Canada ◽  
Codium Fragile

L'emploi des caractères épidermiques dans l'étude taxonomique du Festuca rubra lato sensu (Poaceae)

1996 ◽  
Vol 74 (3) ◽  
pp. 469-485 ◽  
Author(s):  
Martin Dubé ◽  
Pierre Morisset
Keyword(s):  
Morphological Variation ◽  
Festuca Rubra ◽  
Leaf Epidermis ◽  
Eastern Canada ◽  
Anatomical Characters

The leaf epidermis from a collection of 33 specimens encompassing most of the morphological variation of Festuca rubra in Eastern Canada and including two cytotypes (2n = 42 and 2n = 56) is described with 16 characters. The leaf epidermal composition differs markedly between culms and vegetative shoots. Many epidermal characters, particularly those from the vegetative shoots, are among the best ones for distinguishing between the two cytotypes. Parallel analyses using nine anatomical characters show the greater taxonomical potential of epidermis. Keywords: Festuca rubra, leaf, epidermis, anatomy, cytotypes.

scholarly journals Codium fragile: rhizomatous growth in the Zostera thief of eastern Canada

2004 ◽  
Vol 58 (3) ◽  
pp. 141-146 ◽  
Author(s):  
David J. Garbary ◽  
Sarah J. Fraser ◽  
Charlene Hubbard ◽  
Kwang Young Kim
Keyword(s):  
Eastern Canada ◽  
Codium Fragile

The stratigraphic importance of species of Sumatradinium, Barssidinium, and Erymnodinium, Neogene dinoflagellate genera from offshore eastern Canada

1994 ◽  
Vol 31 (3) ◽  
pp. 567-582 ◽  
Author(s):  
Judith K. Lentin ◽  
Robert A. Fensome ◽  
Graham L. Williams
Keyword(s):  
New Species ◽  
Morphological Variation ◽  
Generic Diagnosis ◽  
Dinoflagellate Cysts ◽  
Eastern Canada ◽  
Specific Diagnosis ◽  
Constituent Species ◽  
Rich Diversity ◽  
Biostratigraphic Subdivision

The Neogene strata of offshore eastern Canada contain a rich diversity of dinoflagellate cysts. Among the most distinctive are species of the peridinialean genus Sumatradinium and the related genera Barssidinium gen.nov. and Erymnodinium gen.nov. Sumatradinium and Erymnodinium have a reticulate wall, whereas Barssidinium has a smooth to granulate wall. Sumatradinium and Barssidinium have processes or pustules only; Erymnodinium has crests. The three genera and their constituent species are useful for biostratigraphic subdivision in the Miocene and Pliocene, as exemplified in the two wells Evangeline H-98 and Heron H-73; stratigraphic control for these wells is based on previously established palynologic data. To categorize the considerable morphological variation of these genera and promote their biostratigraphic usefulness, we propose five new species: Sumatradinium druggii, Sumatradinium pustulosum, Barssidinium evangelineae, Barssidinium graminosum, and Barssidinium wrennii. We also emend the generic diagnosis of Sumatradinium and the specific diagnosis of Sumatradinium hispidum.

Morphological variation inNepeta nuda L

1982 ◽  
Vol 93 (1-2) ◽  
pp. 71-76
Author(s):  
S. Kokkini ◽  
D. Babalonas
Keyword(s):  
Morphological Variation

Seasonal diving and foraging behaviour of Eastern Canada-West Greenland bowhead whales

2020 ◽  
Vol 643 ◽  
pp. 197-217 ◽  
Author(s):  
SME Fortune ◽  
SH Ferguson ◽  
AW Trites ◽  
B LeBlanc ◽  
V LeMay ◽  
...  
Keyword(s):  
Climate Change ◽  
Late Summer ◽  
Calanoid Copepods ◽  
Eastern Canada ◽  
West Greenland ◽  
Bowhead Whales ◽  
Seasonal Movement ◽  
Dive Behaviour ◽  
Calanus Glacialis ◽  
Canada West

Climate change may affect the foraging success of bowhead whales Balaena mysticetus by altering the diversity and abundance of zooplankton species available as food. However, assessing climate-induced impacts first requires documenting feeding conditions under current environmental conditions. We collected seasonal movement and dive-behaviour data from 25 Eastern Canada-West Greenland bowheads instrumented with time-depth telemetry tags and used state-space models to examine whale movements and dive behaviours. Zooplankton samples were also collected in Cumberland Sound (CS) to determine species composition and biomass. We found that CS was used seasonally by 14 of the 25 tagged whales. Area-restricted movement was the dominant behaviour in CS, suggesting that the tagged whales allocated considerable time to feeding. Prey sampling data suggested that bowheads were exploiting energy-rich Arctic copepods such as Calanus glacialis and C. hyperboreus during summer. Dive behaviour changed seasonally in CS. Most notably, probable feeding dives were substantially shallower during spring and summer compared to fall and winter. These seasonal changes in dive depths likely reflect changes in the vertical distribution of calanoid copepods, which are known to suspend development and overwinter at depth during fall and winter when availability of their phytoplankton prey is presumed to be lower. Overall, CS appears to be an important year-round foraging habitat for bowheads, but is particularly important during the late summer and fall. Whether CS will remain a reliable feeding area for bowhead whales under climate change is not yet known.

Morphological variation of Synedra rumpens Kuetz. var. fragilarioides Grun.

1991 ◽  
Vol 27 (1) ◽  
pp. 139-162
Author(s):  
Hiroshi FUKUSHIMA ◽  
Tsuyako KO-BAYASHI ◽  
Mika KURIHARA ◽  
Harue OHTSUKA
Keyword(s):  
Morphological Variation
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