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Data de Publicação: | 2004 |
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Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Biotemas (Online) |
Texto Completo: | https://periodicos.ufsc.br/index.php/biotemas/article/view/23247 |
Resumo: | Population ecology of Paepalanthus polyanthus (Bong.) Kunth: temporal variation in the pattern of spatial distribution. The temporal variation in density and pattern of spatial distribution of Paepalanthus polyanthus (Bong.) Kunth (Eriocaulaceae) were evaluated at a determinate sand dune. This study was carried out over a period of five years, at three permanent plots of 25 m2 in a sand dune slack at Joaquina Beach, Florianópolis, SC, Brazil. There were strong density fluctuations throughout these years. In areas 1, 2 and 3, the densities changed from 10.4, 2.2 and 1.8 plants/m2 in December 1986 to 75.8, 11.4 and 45.6 plants/m 2 in December 1991. Area 3, situated on an elevated site, presented greater variation in density, with no live plants in December 1989 and 102.2 plants/m2 at the recruitment observed in May 1990. Despite these density fluctuations, the pattern of spatial distribution was always aggregated (Id > 1, P<0.05). The greatest Id values occurred in periods of low density and not in those of high density, associated with seedling recruitment. Factors such as high seed production with low dispersal, massive germination in moist years and a comparatively high death rate of seedlings at sites more subject to flooding or more distant from the water table proved themselves able to promote this aggregate pattern and increase it during plant development. |
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.Ecologia populacional de Paepalanthus polyanthus (Bong.) Kunth: variação temporal da distribuição espacialPopulation ecology of Paepalanthus polyanthus (Bong.) Kunth: temporal variation in the pattern of spatial distribution. The temporal variation in density and pattern of spatial distribution of Paepalanthus polyanthus (Bong.) Kunth (Eriocaulaceae) were evaluated at a determinate sand dune. This study was carried out over a period of five years, at three permanent plots of 25 m2 in a sand dune slack at Joaquina Beach, Florianópolis, SC, Brazil. There were strong density fluctuations throughout these years. In areas 1, 2 and 3, the densities changed from 10.4, 2.2 and 1.8 plants/m2 in December 1986 to 75.8, 11.4 and 45.6 plants/m 2 in December 1991. Area 3, situated on an elevated site, presented greater variation in density, with no live plants in December 1989 and 102.2 plants/m2 at the recruitment observed in May 1990. Despite these density fluctuations, the pattern of spatial distribution was always aggregated (Id > 1, P<0.05). The greatest Id values occurred in periods of low density and not in those of high density, associated with seedling recruitment. Factors such as high seed production with low dispersal, massive germination in moist years and a comparatively high death rate of seedlings at sites more subject to flooding or more distant from the water table proved themselves able to promote this aggregate pattern and increase it during plant development.A variação na densidade e no padrão de distribuição espacial de Paepalanthus polyanthus (Bong.) Kunth (Eriocaulaceae) foi avaliada ao longo de cinco anos em três parcelas permanentes de 25 m2, em uma area de baixada úmida de dunas (Praia da Joaquina, Florianópolis, SC). Ocorreram fortes oscilações populacionais neste período, com densidades iniciais de 10,4, 2,2 e 1,8 plantas/m2 e densidades finais de 75,8, 11,4 e 45,6 plantas/m2 nas Areas 1,2 e 3, respectivamente. Na área 3, mais seca, a densidade declinou a zero em dezembro de 1989, atingindo 102,2 plantas após recrutamento em maio de 1990. Apesar das flutuações de densidade, o padrão de distribuição espacial manteve-se sempre agregado (Id> 1, P<0,05). Os maiores valores de agregação ocorreram em períodos de baixa densidade e não naqueles de maior densidade, gerados pelo recrutamento de plantulas. A elevada produção de sementes com baixa dispersão, um padrão de germinação maciça em anos de maior umidade, uma mortalidade acentuada em trechos alagáveis e nos trechos mais elevados e secos do micro-relevo podem gerar tal padrão agregado e acentuá-lo ao longo do desenvolvimento das plantas.Universidade Federal de Santa Catarina2004-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufsc.br/index.php/biotemas/article/view/23247Biotemas; v. 17 n. 2 (2004); 27-452175-79250103-1643reponame:Biotemas (Online)instname:Universidade Federal de Santa Catarina (UFSC)instacron:UFSCporhttps://periodicos.ufsc.br/index.php/biotemas/article/view/23247/20968Copyright (c) 2004 Karla Zanenga Scherer, Tânia Tarabini Castellanihttp://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessScherer, Karla ZanengaCastellani, Tânia Tarabini2022-11-21T11:17:32Zoai:periodicos.ufsc.br:article/23247Revistahttp://www.biotemas.ufsc.br/index.htmPUBhttps://periodicos.ufsc.br/index.php/biotemas/oai||carlospinto@ccb.ufsc.br2175-79250103-1643opendoar:2022-11-21T11:17:32Biotemas (Online) - Universidade Federal de Santa Catarina (UFSC)false |
dc.title.none.fl_str_mv |
. Ecologia populacional de Paepalanthus polyanthus (Bong.) Kunth: variação temporal da distribuição espacial |
title |
. |
spellingShingle |
. Scherer, Karla Zanenga |
title_short |
. |
title_full |
. |
title_fullStr |
. |
title_full_unstemmed |
. |
title_sort |
. |
author |
Scherer, Karla Zanenga |
author_facet |
Scherer, Karla Zanenga Castellani, Tânia Tarabini |
author_role |
author |
author2 |
Castellani, Tânia Tarabini |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Scherer, Karla Zanenga Castellani, Tânia Tarabini |
description |
Population ecology of Paepalanthus polyanthus (Bong.) Kunth: temporal variation in the pattern of spatial distribution. The temporal variation in density and pattern of spatial distribution of Paepalanthus polyanthus (Bong.) Kunth (Eriocaulaceae) were evaluated at a determinate sand dune. This study was carried out over a period of five years, at three permanent plots of 25 m2 in a sand dune slack at Joaquina Beach, Florianópolis, SC, Brazil. There were strong density fluctuations throughout these years. In areas 1, 2 and 3, the densities changed from 10.4, 2.2 and 1.8 plants/m2 in December 1986 to 75.8, 11.4 and 45.6 plants/m 2 in December 1991. Area 3, situated on an elevated site, presented greater variation in density, with no live plants in December 1989 and 102.2 plants/m2 at the recruitment observed in May 1990. Despite these density fluctuations, the pattern of spatial distribution was always aggregated (Id > 1, P<0.05). The greatest Id values occurred in periods of low density and not in those of high density, associated with seedling recruitment. Factors such as high seed production with low dispersal, massive germination in moist years and a comparatively high death rate of seedlings at sites more subject to flooding or more distant from the water table proved themselves able to promote this aggregate pattern and increase it during plant development. |
publishDate |
2004 |
dc.date.none.fl_str_mv |
2004-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://periodicos.ufsc.br/index.php/biotemas/article/view/23247 |
url |
https://periodicos.ufsc.br/index.php/biotemas/article/view/23247 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://periodicos.ufsc.br/index.php/biotemas/article/view/23247/20968 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2004 Karla Zanenga Scherer, Tânia Tarabini Castellani http://creativecommons.org/licenses/by/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2004 Karla Zanenga Scherer, Tânia Tarabini Castellani http://creativecommons.org/licenses/by/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Catarina |
publisher.none.fl_str_mv |
Universidade Federal de Santa Catarina |
dc.source.none.fl_str_mv |
Biotemas; v. 17 n. 2 (2004); 27-45 2175-7925 0103-1643 reponame:Biotemas (Online) instname:Universidade Federal de Santa Catarina (UFSC) instacron:UFSC |
instname_str |
Universidade Federal de Santa Catarina (UFSC) |
instacron_str |
UFSC |
institution |
UFSC |
reponame_str |
Biotemas (Online) |
collection |
Biotemas (Online) |
repository.name.fl_str_mv |
Biotemas (Online) - Universidade Federal de Santa Catarina (UFSC) |
repository.mail.fl_str_mv |
||carlospinto@ccb.ufsc.br |
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1799940552229126144 |