Variation of the population structure of Polygonum viviparum L. in relation to certain environmental conditions
Populations of Polygonum viviparum L. have been studied at Godhavn in Greenland (69° 14' N, 53° 31 ' W), at 30 sites within an investigation area of approx. six km2. At each site, the age structure of the population was described after the individuals had been classified on the basis of th...
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Danish Polar Center/Museum Tusculanum Press
1981
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Online Access: | https://tidsskrift.dk/meddrgroenland_biosci/article/view/142181 |
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ftkbcopenhojs:oai:ojs.tidsskrift.dk:article/142181 2024-01-28T10:05:57+01:00 Variation of the population structure of Polygonum viviparum L. in relation to certain environmental conditions Petersen, Peter Milan 1981-01-01 application/pdf https://tidsskrift.dk/meddrgroenland_biosci/article/view/142181 eng eng Danish Polar Center/Museum Tusculanum Press https://tidsskrift.dk/meddrgroenland_biosci/article/view/142181/185875 https://tidsskrift.dk/meddrgroenland_biosci/article/view/142181 Meddelelser om Grønland. Bioscience; Vol. 4 (1981): Meddelelser om Grønland. Bioscience; 19 pp. Meddelelser om Grønland. Bioscience; Årg. 4 (1981): Meddelelser om Grønland. Bioscience; 19 pp. 0106-1054 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1981 ftkbcopenhojs 2024-01-03T23:58:33Z Populations of Polygonum viviparum L. have been studied at Godhavn in Greenland (69° 14' N, 53° 31 ' W), at 30 sites within an investigation area of approx. six km2. At each site, the age structure of the population was described after the individuals had been classified on the basis of the morphology of the rhizome. Other population parameters investigated are the total number of individuals (1 - 2,860 per m2), number of recently established individuals (0 - 1,720 per m2), number of flowering individuals (0 - 850 per m2), number of bulbils produced (0 - 17,870 per m2), and dry weight of standing crop (0.6 - 281 g per m2); the numbers in the brackets give the total range for the 30 sites. The flowering individuals have been characterized by the age class in which flowering first occurs, the mean dry weight of the vegetative parts (0.06 - 0.94 g) and the mean number of bulbils (9± 4 - 114 ± 46). The environmental parameters studied include height above sea level, slope and direction of slope, soil water content, loss on ignition, bulk density, pH, exchangeable K, 0.2 N H2S04-soluble P, C/N, soil temperature, time of disappearance of the snow, soil movement, and degree of cover of the vegetation. The sites have been assigned to six groups which are defined with emphasis on those factors which are assumed to be limiting: 1. Sites with soil movement, 2. Sites where the snow is late in disappearing, 3. Sites with waterlogged soil, 4. Well-drained sites on level or slightly sloping ground, 5. Steep slopes, exposed to the sun, and 6. Sites where competition for light is an important factor. Within each of the groups, the sites show a number of common features, especially as regards relative values referring to the population structure, and various features characterizing the plants. It is suggested that the large variation in the population parameters mentioned above occurs mainly because individuals of Polygonum viviparum of a different age are in a different way and to a different degree influenced by the ... Article in Journal/Newspaper Godhavn Greenland Polygonum viviparum Tidsskrift.dk (The Royal Library, Denmark) Greenland |
institution |
Open Polar |
collection |
Tidsskrift.dk (The Royal Library, Denmark) |
op_collection_id |
ftkbcopenhojs |
language |
English |
description |
Populations of Polygonum viviparum L. have been studied at Godhavn in Greenland (69° 14' N, 53° 31 ' W), at 30 sites within an investigation area of approx. six km2. At each site, the age structure of the population was described after the individuals had been classified on the basis of the morphology of the rhizome. Other population parameters investigated are the total number of individuals (1 - 2,860 per m2), number of recently established individuals (0 - 1,720 per m2), number of flowering individuals (0 - 850 per m2), number of bulbils produced (0 - 17,870 per m2), and dry weight of standing crop (0.6 - 281 g per m2); the numbers in the brackets give the total range for the 30 sites. The flowering individuals have been characterized by the age class in which flowering first occurs, the mean dry weight of the vegetative parts (0.06 - 0.94 g) and the mean number of bulbils (9± 4 - 114 ± 46). The environmental parameters studied include height above sea level, slope and direction of slope, soil water content, loss on ignition, bulk density, pH, exchangeable K, 0.2 N H2S04-soluble P, C/N, soil temperature, time of disappearance of the snow, soil movement, and degree of cover of the vegetation. The sites have been assigned to six groups which are defined with emphasis on those factors which are assumed to be limiting: 1. Sites with soil movement, 2. Sites where the snow is late in disappearing, 3. Sites with waterlogged soil, 4. Well-drained sites on level or slightly sloping ground, 5. Steep slopes, exposed to the sun, and 6. Sites where competition for light is an important factor. Within each of the groups, the sites show a number of common features, especially as regards relative values referring to the population structure, and various features characterizing the plants. It is suggested that the large variation in the population parameters mentioned above occurs mainly because individuals of Polygonum viviparum of a different age are in a different way and to a different degree influenced by the ... |
format |
Article in Journal/Newspaper |
author |
Petersen, Peter Milan |
spellingShingle |
Petersen, Peter Milan Variation of the population structure of Polygonum viviparum L. in relation to certain environmental conditions |
author_facet |
Petersen, Peter Milan |
author_sort |
Petersen, Peter Milan |
title |
Variation of the population structure of Polygonum viviparum L. in relation to certain environmental conditions |
title_short |
Variation of the population structure of Polygonum viviparum L. in relation to certain environmental conditions |
title_full |
Variation of the population structure of Polygonum viviparum L. in relation to certain environmental conditions |
title_fullStr |
Variation of the population structure of Polygonum viviparum L. in relation to certain environmental conditions |
title_full_unstemmed |
Variation of the population structure of Polygonum viviparum L. in relation to certain environmental conditions |
title_sort |
variation of the population structure of polygonum viviparum l. in relation to certain environmental conditions |
publisher |
Danish Polar Center/Museum Tusculanum Press |
publishDate |
1981 |
url |
https://tidsskrift.dk/meddrgroenland_biosci/article/view/142181 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Godhavn Greenland Polygonum viviparum |
genre_facet |
Godhavn Greenland Polygonum viviparum |
op_source |
Meddelelser om Grønland. Bioscience; Vol. 4 (1981): Meddelelser om Grønland. Bioscience; 19 pp. Meddelelser om Grønland. Bioscience; Årg. 4 (1981): Meddelelser om Grønland. Bioscience; 19 pp. 0106-1054 |
op_relation |
https://tidsskrift.dk/meddrgroenland_biosci/article/view/142181/185875 https://tidsskrift.dk/meddrgroenland_biosci/article/view/142181 |
_version_ |
1789332519678640128 |