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

scholarly journals Comparative growth forms of dryland forage legumes

2003 ◽  
Vol 11 ◽  
pp. 19-25
Author(s):  
R.G. Thomas
Keyword(s):  
White Clover ◽  
Seedling Establishment ◽  
Carbon Allocation ◽  
Maximum Growth ◽  
Forage Legume ◽  
Growth Forms ◽  
Leaf Production ◽  
Nodal Roots ◽  
Tap Root ◽  
The Impact

Basic forage legume morphology and development are described with reference to white, red, subterranean and caucasian clovers, lotus and lucerne, with emphasis on characteristics that relate to persistence in dryland environments, including crown formation, contractile tap roots and rhizomes. The range of structural variation is considered in detail by comparing development of plants with two extreme growth forms, i.e. white clover, which has branching horizontal growth and nodal roots, and lucerne and caucasian clover, which have vertical growth, permanent crowns and deep tap roots. Emphasis is placed on carbon allocation strategies during establishment and the inevitable compromise between shoot and root growth, which results in slow seedling establishment of the tap-rooted species, and on the effect of nodal roots as competitive sinks for carbon, which affect tap root development and longevity in white clover. The influence of storage tissues and the number of viable buds on regrowth following drought, overwintering and grazing is discussed together with the impact of variations in flowering shoot formation. All existing growth forms are seen as having evolved as compromise solutions to the problem of combining maximum growth rates with optimum drought tolerance. The possibility, or otherwise, of being able to combine rapid establishment, involving maximised leaf production, with development of a persistent deeply penetrating tap root is considered in light of present understanding. Key words: carbon allocation, dryland environment, forage legume, morphology, nodal roots, persistence, root:shoot ratio, seedling establishment, tap roots

scholarly journals Effects of simulated increased grazing on carbon allocation patterns in a high arctic mire

2014 ◽  
Vol 119 (1-3) ◽  
pp. 229-244 ◽  
Author(s):  
Julie Maria Falk ◽  
Niels Martin Schmidt ◽  
Lena Ström
Keyword(s):  
Carbon Allocation ◽  
High Arctic ◽  
Allocation Patterns

Photosynthetic capacity and carbon allocation patterns in diverse growth forms of Eucalyptus

Oecologia ◽  
1978 ◽  
Vol 36 (1) ◽  
pp. 103-111 ◽  
Author(s):  
H. A. Mooney ◽  
Pamela J. Ferrar ◽  
R. O. Slatyer
Keyword(s):  
Carbon Allocation ◽  
Photosynthetic Capacity ◽  
Growth Forms ◽  
Allocation Patterns

GROWTH FORMS OF KOMI REPUBLIC PROTECTED PLANTS

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
Yurii Bobroff ◽  
Irina Chudinova ◽  
Victoria Bulysheva ◽  
Lyubov’ Pozdeeva
Keyword(s):  
Komi Republic ◽  
Growth Forms ◽  
Protected Plants

Summer phytoplankton of the northern Barents Sea (75–80º N)

2019 ◽  
pp. 8-19
Author(s):  
Larisa A. Pautova ◽  
Vladimir A. Silkin ◽  
Marina D. Kravchishina ◽  
Valeriy G. Yakubenko ◽  
Anna L. Chultsova
Keyword(s):  
Barents Sea ◽  
Weighted Average ◽  
Arctic Basin ◽  
High Arctic ◽  
Alexandrium Tamarense ◽  
Warm Water ◽  
The Arctic ◽  
Absolute Maximum ◽  
Deep Trench ◽  
Maximum Biomass

The structure of the summer planktonic communities of the Northern part of the Barents sea in the first half of August 2017 were studied. In the sea-ice melting area, the average phytoplankton biomass producing upper 50-meter layer of water reached values levels of eutrophic waters (up to 2.1 g/m3). Phytoplankton was presented by diatoms of the genera Thalassiosira and Eucampia. Maximum biomass recorded at depths of 22–52 m, the absolute maximum biomass community (5,0 g/m3) marked on the horizon of 45 m (station 5558), located at the outlet of the deep trench Franz Victoria near the West coast of the archipelago Franz Josef Land. In ice-free waters, phytoplankton abundance was low, and the weighted average biomass (8.0 mg/m3 – 123.1 mg/m3) corresponded to oligotrophic waters and lower mesotrophic waters. In the upper layers of the water population abundance was dominated by small flagellates and picoplankton from, biomass – Arctic dinoflagellates (Gymnodinium spp.) and cold Atlantic complexes (Gyrodinium lachryma, Alexandrium tamarense, Dinophysis norvegica). The proportion of Atlantic species in phytoplankton reached 75%. The representatives of warm-water Atlantic complex (Emiliania huxleyi, Rhizosolenia hebetata f. semispina, Ceratium horridum) were recorded up to 80º N, as indicators of the penetration of warm Atlantic waters into the Arctic basin. The presence of oceanic Atlantic species as warm-water and cold systems in the high Arctic indicates the strengthening of processes of “atlantificacion” in the region.

Structural variation in the songs of Atlantic walruses breeding in the Canadian High Arctic

2003 ◽  
Vol 29 (2) ◽  
pp. 297-318 ◽  
Author(s):  
Becky Sjare ◽  
Ian Stirling ◽  
Cheryl Spencer
Keyword(s):  
Structural Variation ◽  
High Arctic ◽  
Canadian High Arctic

Body condition and spring migration in female high-arctic barnacle geeseBranta leucopsis

1996 ◽  
Vol 2 (1) ◽  
pp. 247-251 ◽  
Author(s):  
Ingunn M. Tombre ◽  
Kjell E. Erikstad ◽  
Geir W. Gabrielsen ◽  
Karl-Birger Strann ◽  
Jeffrey M. Black
Keyword(s):  
Body Condition ◽  
High Arctic ◽  
Spring Migration
Sign in / Sign up

Export Citation Format

Share Document