Factors driving seed dispersal in a Neotropical river-floodplain system
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Acta Botanica Brasilica |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000300465 |
Resumo: | ABSTRACT Dispersal is a key process affecting the diversity of natural communities. We addressed hydrochory of wetland plant seeds in the Middle Paraná River floodplain. We first studied seed dispersal by drifting macrophytes in the Paraná River main channel (MC), in a high discharge secondary channel (HD) and in two low discharge channels (LD) during an extraordinary flood. We then experimentally analyzed the effect of standing (SW) and moving water (MW) on seed buoyancy of different plant communities. We recorded seeds of 27 taxa distributed in 12 families. Taxa richness ranged from 17 in LD to 25 in MC, and included seeds of terrestrial, palustrine and aquatic plants. River discharge did not affect seed richness and density, which was probably associated with a homogenization process caused by the flood. Seed buoyancy significantly differed between water movement treatments independently of the source community, lasting longer in SW than in MW. Our results suggest that drifting macrophytes contribute to seed dispersal of several communities in the Middle Paraná River, and probably over long distances. Furthermore, seed buoyancy might be more important for surficial dispersal in low-energy systems, where subaqueous dispersal may be difficult due to the lack of current. |
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Acta Botanica Brasilica |
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Factors driving seed dispersal in a Neotropical river-floodplain systemdispersaldrifting macrophyteshydrochoryMiddle Paraná Riverpropagulesriver dischargewater movementABSTRACT Dispersal is a key process affecting the diversity of natural communities. We addressed hydrochory of wetland plant seeds in the Middle Paraná River floodplain. We first studied seed dispersal by drifting macrophytes in the Paraná River main channel (MC), in a high discharge secondary channel (HD) and in two low discharge channels (LD) during an extraordinary flood. We then experimentally analyzed the effect of standing (SW) and moving water (MW) on seed buoyancy of different plant communities. We recorded seeds of 27 taxa distributed in 12 families. Taxa richness ranged from 17 in LD to 25 in MC, and included seeds of terrestrial, palustrine and aquatic plants. River discharge did not affect seed richness and density, which was probably associated with a homogenization process caused by the flood. Seed buoyancy significantly differed between water movement treatments independently of the source community, lasting longer in SW than in MW. Our results suggest that drifting macrophytes contribute to seed dispersal of several communities in the Middle Paraná River, and probably over long distances. Furthermore, seed buoyancy might be more important for surficial dispersal in low-energy systems, where subaqueous dispersal may be difficult due to the lack of current.Sociedade Botânica do Brasil2019-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000300465Acta Botanica Brasilica v.33 n.3 2019reponame:Acta Botanica Brasilicainstname:Sociedade Botânica do Brasil (SBB)instacron:SBB10.1590/0102-33062019abb0065info:eu-repo/semantics/openAccessFernández,Florencia FacelliSchneider,BereniceZilli,Florenciaeng2020-02-14T00:00:00Zoai:scielo:S0102-33062019000300465Revistahttps://www.scielo.br/j/abb/ONGhttps://old.scielo.br/oai/scielo-oai.phpacta@botanica.org.br||acta@botanica.org.br|| f.a.r.santos@gmail.com1677-941X0102-3306opendoar:2020-02-14T00:00Acta Botanica Brasilica - Sociedade Botânica do Brasil (SBB)false |
dc.title.none.fl_str_mv |
Factors driving seed dispersal in a Neotropical river-floodplain system |
title |
Factors driving seed dispersal in a Neotropical river-floodplain system |
spellingShingle |
Factors driving seed dispersal in a Neotropical river-floodplain system Fernández,Florencia Facelli dispersal drifting macrophytes hydrochory Middle Paraná River propagules river discharge water movement |
title_short |
Factors driving seed dispersal in a Neotropical river-floodplain system |
title_full |
Factors driving seed dispersal in a Neotropical river-floodplain system |
title_fullStr |
Factors driving seed dispersal in a Neotropical river-floodplain system |
title_full_unstemmed |
Factors driving seed dispersal in a Neotropical river-floodplain system |
title_sort |
Factors driving seed dispersal in a Neotropical river-floodplain system |
author |
Fernández,Florencia Facelli |
author_facet |
Fernández,Florencia Facelli Schneider,Berenice Zilli,Florencia |
author_role |
author |
author2 |
Schneider,Berenice Zilli,Florencia |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Fernández,Florencia Facelli Schneider,Berenice Zilli,Florencia |
dc.subject.por.fl_str_mv |
dispersal drifting macrophytes hydrochory Middle Paraná River propagules river discharge water movement |
topic |
dispersal drifting macrophytes hydrochory Middle Paraná River propagules river discharge water movement |
description |
ABSTRACT Dispersal is a key process affecting the diversity of natural communities. We addressed hydrochory of wetland plant seeds in the Middle Paraná River floodplain. We first studied seed dispersal by drifting macrophytes in the Paraná River main channel (MC), in a high discharge secondary channel (HD) and in two low discharge channels (LD) during an extraordinary flood. We then experimentally analyzed the effect of standing (SW) and moving water (MW) on seed buoyancy of different plant communities. We recorded seeds of 27 taxa distributed in 12 families. Taxa richness ranged from 17 in LD to 25 in MC, and included seeds of terrestrial, palustrine and aquatic plants. River discharge did not affect seed richness and density, which was probably associated with a homogenization process caused by the flood. Seed buoyancy significantly differed between water movement treatments independently of the source community, lasting longer in SW than in MW. Our results suggest that drifting macrophytes contribute to seed dispersal of several communities in the Middle Paraná River, and probably over long distances. Furthermore, seed buoyancy might be more important for surficial dispersal in low-energy systems, where subaqueous dispersal may be difficult due to the lack of current. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-09-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000300465 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000300465 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0102-33062019abb0065 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Botânica do Brasil |
publisher.none.fl_str_mv |
Sociedade Botânica do Brasil |
dc.source.none.fl_str_mv |
Acta Botanica Brasilica v.33 n.3 2019 reponame:Acta Botanica Brasilica instname:Sociedade Botânica do Brasil (SBB) instacron:SBB |
instname_str |
Sociedade Botânica do Brasil (SBB) |
instacron_str |
SBB |
institution |
SBB |
reponame_str |
Acta Botanica Brasilica |
collection |
Acta Botanica Brasilica |
repository.name.fl_str_mv |
Acta Botanica Brasilica - Sociedade Botânica do Brasil (SBB) |
repository.mail.fl_str_mv |
acta@botanica.org.br||acta@botanica.org.br|| f.a.r.santos@gmail.com |
_version_ |
1752126663448068096 |