The interspecific competition of tropical estuarine macrophytes is not density-dependent
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.aquabot.2020.103233 http://hdl.handle.net/11449/200121 |
Resumo: | The interspecific competition of aquatic macrophytes may be density-dependent and its outcome has importance for the monospecific and mixed stands zonation in tropical estuaries. To evaluate the growth of Spartina alterniflora and Crinum americanum and the effect of the initial densities on their competition we developed a laboratory experiment using five planting densities of young individuals (8:0, 5:3, 4:4, 3:5 and 0:8) and two sediment types (lower and middle estuary sediment: salinity 20.90 and 6.60, respectively). We tested the hypotheses that (i) in the lower estuary sediment S. alterniflora would have greater competitive ability than C. americanum even at lower initial densities, because of its great salt tolerance; (ii) However, at the middle estuary sediment the competitive outcome would depend on initial plant densities, because of the favorable brackish conditions for both species. Our results corroborated our first hypothesis, since in the lower estuary sediment S. alterniflora limited the C. americanum aboveground biomass by asymmetrical competition regardless of their planting densities. However, our second hypothesis was not confirmed as S. alterniflora had greater competitive ability and limited C. americanum at any planting density in the middle estuary sediment. We conclude that the competition between S. alterniflora and C. americanum in the two sediment types is not density-dependent. We suggest that in the lower estuary S. alterniflora might have competitively excluded C. americanum regardless of their colonization densities; and that in the middle estuary the arrival order might be important to the mixed stands organization. |
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The interspecific competition of tropical estuarine macrophytes is not density-dependentColonizationCompetitive exclusionCrinum americanumPlanting densityPropagules pressureSalinity gradientSpartina alternifloraThe interspecific competition of aquatic macrophytes may be density-dependent and its outcome has importance for the monospecific and mixed stands zonation in tropical estuaries. To evaluate the growth of Spartina alterniflora and Crinum americanum and the effect of the initial densities on their competition we developed a laboratory experiment using five planting densities of young individuals (8:0, 5:3, 4:4, 3:5 and 0:8) and two sediment types (lower and middle estuary sediment: salinity 20.90 and 6.60, respectively). We tested the hypotheses that (i) in the lower estuary sediment S. alterniflora would have greater competitive ability than C. americanum even at lower initial densities, because of its great salt tolerance; (ii) However, at the middle estuary sediment the competitive outcome would depend on initial plant densities, because of the favorable brackish conditions for both species. Our results corroborated our first hypothesis, since in the lower estuary sediment S. alterniflora limited the C. americanum aboveground biomass by asymmetrical competition regardless of their planting densities. However, our second hypothesis was not confirmed as S. alterniflora had greater competitive ability and limited C. americanum at any planting density in the middle estuary sediment. We conclude that the competition between S. alterniflora and C. americanum in the two sediment types is not density-dependent. We suggest that in the lower estuary S. alterniflora might have competitively excluded C. americanum regardless of their colonization densities; and that in the middle estuary the arrival order might be important to the mixed stands organization.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Programa de Pós-Graduação em Ciências Biológicas (Biologia Vegetal) Instituto de Biociências de Rio Claro Universidade Estadual Paulista UNESP, Av. 24A, 1515Departamento de Ecologia Instituto de Biociências de Rio Claro Universidade Estadual Paulista UNESP, Av. 24A, 1515Programa de Pós-Graduação em Ciências Biológicas (Biologia Vegetal) Instituto de Biociências de Rio Claro Universidade Estadual Paulista UNESP, Av. 24A, 1515Departamento de Ecologia Instituto de Biociências de Rio Claro Universidade Estadual Paulista UNESP, Av. 24A, 1515FAPESP: #2016/01416-4Universidade Estadual Paulista (Unesp)Nunes, Laís Samira Correia [UNESP]Camargo, Antonio Fernando Monteiro [UNESP]2020-12-12T01:58:16Z2020-12-12T01:58:16Z2020-05-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.aquabot.2020.103233Aquatic Botany, v. 164.0304-3770http://hdl.handle.net/11449/20012110.1016/j.aquabot.2020.1032332-s2.0-85080989034Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAquatic Botanyinfo:eu-repo/semantics/openAccess2021-10-23T12:19:09Zoai:repositorio.unesp.br:11449/200121Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T18:39:08.275309Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
The interspecific competition of tropical estuarine macrophytes is not density-dependent |
title |
The interspecific competition of tropical estuarine macrophytes is not density-dependent |
spellingShingle |
The interspecific competition of tropical estuarine macrophytes is not density-dependent Nunes, Laís Samira Correia [UNESP] Colonization Competitive exclusion Crinum americanum Planting density Propagules pressure Salinity gradient Spartina alterniflora |
title_short |
The interspecific competition of tropical estuarine macrophytes is not density-dependent |
title_full |
The interspecific competition of tropical estuarine macrophytes is not density-dependent |
title_fullStr |
The interspecific competition of tropical estuarine macrophytes is not density-dependent |
title_full_unstemmed |
The interspecific competition of tropical estuarine macrophytes is not density-dependent |
title_sort |
The interspecific competition of tropical estuarine macrophytes is not density-dependent |
author |
Nunes, Laís Samira Correia [UNESP] |
author_facet |
Nunes, Laís Samira Correia [UNESP] Camargo, Antonio Fernando Monteiro [UNESP] |
author_role |
author |
author2 |
Camargo, Antonio Fernando Monteiro [UNESP] |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Nunes, Laís Samira Correia [UNESP] Camargo, Antonio Fernando Monteiro [UNESP] |
dc.subject.por.fl_str_mv |
Colonization Competitive exclusion Crinum americanum Planting density Propagules pressure Salinity gradient Spartina alterniflora |
topic |
Colonization Competitive exclusion Crinum americanum Planting density Propagules pressure Salinity gradient Spartina alterniflora |
description |
The interspecific competition of aquatic macrophytes may be density-dependent and its outcome has importance for the monospecific and mixed stands zonation in tropical estuaries. To evaluate the growth of Spartina alterniflora and Crinum americanum and the effect of the initial densities on their competition we developed a laboratory experiment using five planting densities of young individuals (8:0, 5:3, 4:4, 3:5 and 0:8) and two sediment types (lower and middle estuary sediment: salinity 20.90 and 6.60, respectively). We tested the hypotheses that (i) in the lower estuary sediment S. alterniflora would have greater competitive ability than C. americanum even at lower initial densities, because of its great salt tolerance; (ii) However, at the middle estuary sediment the competitive outcome would depend on initial plant densities, because of the favorable brackish conditions for both species. Our results corroborated our first hypothesis, since in the lower estuary sediment S. alterniflora limited the C. americanum aboveground biomass by asymmetrical competition regardless of their planting densities. However, our second hypothesis was not confirmed as S. alterniflora had greater competitive ability and limited C. americanum at any planting density in the middle estuary sediment. We conclude that the competition between S. alterniflora and C. americanum in the two sediment types is not density-dependent. We suggest that in the lower estuary S. alterniflora might have competitively excluded C. americanum regardless of their colonization densities; and that in the middle estuary the arrival order might be important to the mixed stands organization. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-12T01:58:16Z 2020-12-12T01:58:16Z 2020-05-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.aquabot.2020.103233 Aquatic Botany, v. 164. 0304-3770 http://hdl.handle.net/11449/200121 10.1016/j.aquabot.2020.103233 2-s2.0-85080989034 |
url |
http://dx.doi.org/10.1016/j.aquabot.2020.103233 http://hdl.handle.net/11449/200121 |
identifier_str_mv |
Aquatic Botany, v. 164. 0304-3770 10.1016/j.aquabot.2020.103233 2-s2.0-85080989034 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Aquatic Botany |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128960011173888 |