Ecological Significance of Different Growth Forms of Purple Saxifrage, Saxifraga oppositifolia L., in the High Arctic, Ny-Ålesund, Svalbard

1999 ◽  
Vol 31 (1) ◽  
pp. 27 ◽  
Author(s):  
Atsushi Kume ◽  
Takayuki Nakatsubo ◽  
Yukiko Bekku ◽  
Takehiro Masuzawa
Keyword(s):  
High Arctic ◽  
Ecological Significance ◽  
Growth Forms ◽  
Saxifraga Oppositifolia

Ecological Significance of Different Growth Forms of Purple Saxifrage,Saxifraga oppositifoliaL., in the High Arctic, Ny-Ålesund, Svalbard

1999 ◽  
Vol 31 (1) ◽  
pp. 27-33 ◽  
Author(s):  
Atsushi Kume ◽  
Takayuki Nakatsubo ◽  
Yukiko Bekku ◽  
Takehiro Masuzawa
Keyword(s):  
High Arctic ◽  
Ecological Significance ◽  
Growth Forms

scholarly journals Tetraploids do not form cushions: association of ploidy level, growth form and ecology in the High Arctic Saxifraga oppositifolia L. s. lat. (Saxifragaceae) in Svalbard

2013 ◽  
Vol 32 (1) ◽  
pp. 20071 ◽  
Author(s):  
Pernille Bronken Eidesen ◽  
Eike Müller ◽  
Christian Lettner ◽  
Inger Greve Alsos ◽  
Morgan Bender ◽  
...  
Keyword(s):  
Ploidy Level ◽  
Growth Form ◽  
High Arctic ◽  
Saxifraga Oppositifolia

Growth Forms, Carbon Allocation, and Reproductive Patterns of High Arctic Saxifrages

1985 ◽  
Vol 17 (3) ◽  
pp. 241 ◽  
Author(s):  
N. E. Grulke ◽  
L. C. Bliss
Keyword(s):  
Carbon Allocation ◽  
High Arctic ◽  
Growth Forms ◽  
Reproductive Patterns

Molecular diversity and derivations of populations of Silene acaulis and Saxifraga oppositifolia from the high Arctic and more southerly latitudes

1995 ◽  
Vol 4 (2) ◽  
pp. 199-208 ◽  
Author(s):  
R. J. ABBOTT ◽  
H. M. CHAPMAN ◽  
R. M. M. CRAWFORD ◽  
D. G. FORBES
Keyword(s):  
Molecular Diversity ◽  
High Arctic ◽  
Silene Acaulis ◽  
Saxifraga Oppositifolia

Winged morph of the high arctic aphid Acyrthosiphon svalbardicum (Hemiptera: Aphididae): abundance, reproductive status, and ecological significance

2008 ◽  
Vol 140 (3) ◽  
pp. 385-387 ◽  
Author(s):  
J.-C. Simon ◽  
J. Bonhomme ◽  
R.L. Blackman ◽  
M. Hullé
Keyword(s):  
High Arctic ◽  
Wing Development ◽  
Sudden Increase ◽  
Single Specimen ◽  
Ecological Significance ◽  
Adaptive Traits ◽  
Dryas Octopetala ◽  
Dispersal Potential ◽  
Harsh Conditions ◽  
Aphid Abundance

AbstractThe aphid Acyrthosiphon svalbardicum Heikinheimo, which is endemic to Svalbard and feeds exclusively on eightpetal mountain-avens, Dryas octopetala L. (Rosaceae), has developed a series of adaptive traits to cope with the harsh conditions of the High Arctic. Prior to this study, only a single specimen of the winged morph of A. svalbardicum had been found, suggesting extremely low dispersal potential. In 2006 we collected many winged females in several places at Kongsfjorden, Spitsbergen. Although winged individuals were generally found in high-density populations, no significant relationship existed between aphid abundance and wing development. We discuss whether this sudden increase in winged-morph production by A. svalbardicum is related to a warmer than usual summer in Svalbard.

scholarly journals Nitrogen concentration within Saxifraga oppositifolia in different successional stages on a glacier foreland in the high Arctic

Polar Science ◽  
2008 ◽  
Vol 2 (2) ◽  
pp. 143-147
Author(s):  
Atsushi Kume ◽  
Yukiko S. Bekku ◽  
Yuko T. Hanba ◽  
Takashi Nakano ◽  
Hiroshi Kanda
Keyword(s):  
Nitrogen Concentration ◽  
High Arctic ◽  
Glacier Foreland ◽  
Saxifraga Oppositifolia ◽  
Successional Stages

The influence of abiotic factors on the growth of two vascular plant species (Saxifraga oppositifolia and Salix polaris) in the High Arctic

CATENA ◽  
2018 ◽  
Vol 163 ◽  
pp. 219-232 ◽  
Author(s):  
Magdalena Opała-Owczarek ◽  
Ewa Pirożnikow ◽  
Piotr Owczarek ◽  
Wojciech Szymański ◽  
Bartłomiej Luks ◽  
...  
Keyword(s):  
Plant Species ◽  
Abiotic Factors ◽  
Vascular Plant ◽  
High Arctic ◽  
Salix Polaris ◽  
Vascular Plant Species ◽  
Saxifraga Oppositifolia

Growth forms and sepal hairs of the purple saxifrage (Saxifraga oppositifolia: Saxifragaceae) in North America related to chromosome records and DNA information

2005 ◽  
Vol 83 (9) ◽  
pp. 1088-1095 ◽  
Author(s):  
S.G. Aiken ◽  
M.C. LeBlanc ◽  
R.L. Boles
Keyword(s):  
North America ◽  
Original Description ◽  
Type Specimen ◽  
Morphological Data ◽  
Herbarium Specimens ◽  
Potential Candidate ◽  
Growth Forms ◽  
Type Specimens ◽  
The North ◽  
Saxifraga Oppositifolia

Growth forms and the presence or absence of hairs on the surfaces of the sepals of Saxifraga oppositifolia L. plants were examined on type specimens and more than 400 herbarium specimens collected from all over North America and Europe. Data were gathered on whether plant growth forms were compact, trailing, or intermediate between the extremes. Specimens were examined for whether or not hairs were present on the surface of the sepals between the long trichomes on the margins, and if so, an estimate was made of the degree of hairiness. While extreme forms of compact and trailing plants do occur, maps indicate that more of the plants collected in North America were intermediate in growth form. The geographic distribution of the presence or absence of hairs on the sepals is mapped, as is the gradation in degree of hairiness of sepals. The type specimen of S. oppositifolia subsp. smalliana (S. pulvinata), from the Yukon, has compact plants and flowers that have sepal surfaces with a few sparse hairs. The flowers have set fruits that have opened. “The smaller turbinate hypanthium” described in the original description may be the result of the structures being dehisced and dried up fruits. The type specimen of S. oppositifolia subsp. glandulisepala , from Alaska, is a relatively trailing specimen with some larger leaves. The sepal surfaces have a few glandular hairs. Whether or not the hairs appear glandular on herbarium specimens may reflect the stage of flowering at the time of collection. No morphological differences are associated with three different chromosome numbers known for S. oppositifolia plants from the area of the North American type specimens, and DNA analyses done mainly on European specimens, but also including a potential candidate for the name “smalliana”, gave inconclusive results. Thus, chromosome and DNA data join these morphological data on growth forms and the occurrence of sepal hairs to discourage recognizing subspecies among plants occurring in North America.

scholarly journals Population genetics of purple saxifrage (Saxifraga oppositifolia) in the high Arctic archipelago of Svalbard

AoB Plants ◽  
2013 ◽  
Vol 5 (0) ◽  
pp. plt024-plt024 ◽  
Author(s):  
M. Pietilainen ◽  
H. Korpelainen
Keyword(s):  
Population Genetics ◽  
High Arctic ◽  
Saxifraga Oppositifolia
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