Sex ratio, flowering and fruit set in dioecious Rubus chamaemorus (Rosaceae) in Labrador
Rubus chamaemorus L. is a dioecious clonal herb with highly variable fruit production. Our overall objective was to determine how fruit production (and the reproductive stages leading to fruit) for R. chamaemorus varied with habitat and population (especially sex ratio) characteristics at scales fro...
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Canadian Science Publishing
2008
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Online Access: | http://dx.doi.org/10.1139/b07-127 http://www.nrcresearchpress.com/doi/full-xml/10.1139/B07-127 http://www.nrcresearchpress.com/doi/pdf/10.1139/B07-127 |
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crcansciencepubl:10.1139/b07-127 2024-09-15T18:32:33+00:00 Sex ratio, flowering and fruit set in dioecious Rubus chamaemorus (Rosaceae) in Labrador Karst, Amanda L. Antos, Joseph A. Allen, Geraldine A. 2008 http://dx.doi.org/10.1139/b07-127 http://www.nrcresearchpress.com/doi/full-xml/10.1139/B07-127 http://www.nrcresearchpress.com/doi/pdf/10.1139/B07-127 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Botany volume 86, issue 2, page 204-212 ISSN 1916-2790 1916-2804 journal-article 2008 crcansciencepubl https://doi.org/10.1139/b07-127 2024-08-15T04:09:29Z Rubus chamaemorus L. is a dioecious clonal herb with highly variable fruit production. Our overall objective was to determine how fruit production (and the reproductive stages leading to fruit) for R. chamaemorus varied with habitat and population (especially sex ratio) characteristics at scales from 1 m 2 quadrats to whole populations in southeastern Labrador, Canada. During the climatically favourable year studied, reproductive variables were only weakly correlated with habitat characteristics. Strongly biased sex ratios were found at scales of 1–10 m. Male-dominated quadrats exhibited a significantly higher proportion of flowering ramets than did female-dominated quadrats. Female-biased sex ratios of flowering ramets and large distances between male and female flowers were correlated with decreased seed set. We found no differences in microhabitats of males and females. Although the biased local sex ratios could limit sexual reproduction, the high fruit set we measured clearly indicates that populations are able to produce abundant fruit during favourable years in this unpredictable environment. Article in Journal/Newspaper Rubus chamaemorus Canadian Science Publishing Botany 86 2 204 212 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
Rubus chamaemorus L. is a dioecious clonal herb with highly variable fruit production. Our overall objective was to determine how fruit production (and the reproductive stages leading to fruit) for R. chamaemorus varied with habitat and population (especially sex ratio) characteristics at scales from 1 m 2 quadrats to whole populations in southeastern Labrador, Canada. During the climatically favourable year studied, reproductive variables were only weakly correlated with habitat characteristics. Strongly biased sex ratios were found at scales of 1–10 m. Male-dominated quadrats exhibited a significantly higher proportion of flowering ramets than did female-dominated quadrats. Female-biased sex ratios of flowering ramets and large distances between male and female flowers were correlated with decreased seed set. We found no differences in microhabitats of males and females. Although the biased local sex ratios could limit sexual reproduction, the high fruit set we measured clearly indicates that populations are able to produce abundant fruit during favourable years in this unpredictable environment. |
format |
Article in Journal/Newspaper |
author |
Karst, Amanda L. Antos, Joseph A. Allen, Geraldine A. |
spellingShingle |
Karst, Amanda L. Antos, Joseph A. Allen, Geraldine A. Sex ratio, flowering and fruit set in dioecious Rubus chamaemorus (Rosaceae) in Labrador |
author_facet |
Karst, Amanda L. Antos, Joseph A. Allen, Geraldine A. |
author_sort |
Karst, Amanda L. |
title |
Sex ratio, flowering and fruit set in dioecious Rubus chamaemorus (Rosaceae) in Labrador |
title_short |
Sex ratio, flowering and fruit set in dioecious Rubus chamaemorus (Rosaceae) in Labrador |
title_full |
Sex ratio, flowering and fruit set in dioecious Rubus chamaemorus (Rosaceae) in Labrador |
title_fullStr |
Sex ratio, flowering and fruit set in dioecious Rubus chamaemorus (Rosaceae) in Labrador |
title_full_unstemmed |
Sex ratio, flowering and fruit set in dioecious Rubus chamaemorus (Rosaceae) in Labrador |
title_sort |
sex ratio, flowering and fruit set in dioecious rubus chamaemorus (rosaceae) in labrador |
publisher |
Canadian Science Publishing |
publishDate |
2008 |
url |
http://dx.doi.org/10.1139/b07-127 http://www.nrcresearchpress.com/doi/full-xml/10.1139/B07-127 http://www.nrcresearchpress.com/doi/pdf/10.1139/B07-127 |
genre |
Rubus chamaemorus |
genre_facet |
Rubus chamaemorus |
op_source |
Botany volume 86, issue 2, page 204-212 ISSN 1916-2790 1916-2804 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/b07-127 |
container_title |
Botany |
container_volume |
86 |
container_issue |
2 |
container_start_page |
204 |
op_container_end_page |
212 |
_version_ |
1810474293674377216 |