Juniperus navicularis - a study of Portuguese population structure and fitness
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10174/19465 |
Resumo: | Juniperus navicularis Gand. is a dioecious endemic conifer that constitutes the understory of seaside pine forests in Portugal, areas currently threatened by increasing urban expansion. The aim of this study is to assess the conservation status of previously known populations of this species located on its core area of distribution. The study was performed in south-west coast of Portugal. Three populations varying in size and pine density were analyzed. Number of individuals, population density, spatial distribution and individual characteristics of junipers were estimated. Female cone, seed characteristics and seed viability were also evaluated. Results suggest that J. navicularis populations are vulnerable because seminal recruitment is scarce, what may lead to a reduction of genetic variability due solely to vegetative propagation. This vulnerability seems to be strongly determined by climatic constraints toward increasing aridity. Ratio between male and female shrubs did not differ from 1:1 in any population. Deviations from 1:1 between mature and non-mature plants were found in all populations, denoting population ageing. Very low seed viability was observed. A major part of described Juniperus navicularis populations have disappeared through direct habitat loss to urban development, loss of fitness in drier and warmer locations and low seed viability. This study is the first to address J. navicularis conservation, and represents a valuable first step toward this species preservation. |
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Juniperus navicularis - a study of Portuguese population structure and fitnessendemic endangered speciespopulation structureseed viabilityfragmented populationCupressaceaeclonal growthJuniperus navicularis Gand. is a dioecious endemic conifer that constitutes the understory of seaside pine forests in Portugal, areas currently threatened by increasing urban expansion. The aim of this study is to assess the conservation status of previously known populations of this species located on its core area of distribution. The study was performed in south-west coast of Portugal. Three populations varying in size and pine density were analyzed. Number of individuals, population density, spatial distribution and individual characteristics of junipers were estimated. Female cone, seed characteristics and seed viability were also evaluated. Results suggest that J. navicularis populations are vulnerable because seminal recruitment is scarce, what may lead to a reduction of genetic variability due solely to vegetative propagation. This vulnerability seems to be strongly determined by climatic constraints toward increasing aridity. Ratio between male and female shrubs did not differ from 1:1 in any population. Deviations from 1:1 between mature and non-mature plants were found in all populations, denoting population ageing. Very low seed viability was observed. A major part of described Juniperus navicularis populations have disappeared through direct habitat loss to urban development, loss of fitness in drier and warmer locations and low seed viability. This study is the first to address J. navicularis conservation, and represents a valuable first step toward this species preservation.Ediciones Complutense2016-12-30T17:18:35Z2016-12-302016-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/19465http://hdl.handle.net/10174/19465engCastro, M., Belo, A., Afonso, A., & Zavattieri, M. (2016). Juniperus navicularis - a study of Portuguese population structure and fitness. Lazaroa, 37, 31-41. doi:10.5209/LAZAROA.47929http://revistas.ucm.es/index.php/LAZA/article/view/47929ICAAM - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica CIMA_UE - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científicaafb@uevora.ptaafonso@uevora.ptzavattieri@uevora.pt221doi:10.5209/LAZAROA.47929Belo, A.D.F.Afonso, AnabelaZavattieri, M. Amelyinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-03T19:08:33Zoai:dspace.uevora.pt:10174/19465Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:11:07.917319Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Juniperus navicularis - a study of Portuguese population structure and fitness |
title |
Juniperus navicularis - a study of Portuguese population structure and fitness |
spellingShingle |
Juniperus navicularis - a study of Portuguese population structure and fitness Belo, A.D.F. endemic endangered species population structure seed viability fragmented population Cupressaceae clonal growth |
title_short |
Juniperus navicularis - a study of Portuguese population structure and fitness |
title_full |
Juniperus navicularis - a study of Portuguese population structure and fitness |
title_fullStr |
Juniperus navicularis - a study of Portuguese population structure and fitness |
title_full_unstemmed |
Juniperus navicularis - a study of Portuguese population structure and fitness |
title_sort |
Juniperus navicularis - a study of Portuguese population structure and fitness |
author |
Belo, A.D.F. |
author_facet |
Belo, A.D.F. Afonso, Anabela Zavattieri, M. Amely |
author_role |
author |
author2 |
Afonso, Anabela Zavattieri, M. Amely |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Belo, A.D.F. Afonso, Anabela Zavattieri, M. Amely |
dc.subject.por.fl_str_mv |
endemic endangered species population structure seed viability fragmented population Cupressaceae clonal growth |
topic |
endemic endangered species population structure seed viability fragmented population Cupressaceae clonal growth |
description |
Juniperus navicularis Gand. is a dioecious endemic conifer that constitutes the understory of seaside pine forests in Portugal, areas currently threatened by increasing urban expansion. The aim of this study is to assess the conservation status of previously known populations of this species located on its core area of distribution. The study was performed in south-west coast of Portugal. Three populations varying in size and pine density were analyzed. Number of individuals, population density, spatial distribution and individual characteristics of junipers were estimated. Female cone, seed characteristics and seed viability were also evaluated. Results suggest that J. navicularis populations are vulnerable because seminal recruitment is scarce, what may lead to a reduction of genetic variability due solely to vegetative propagation. This vulnerability seems to be strongly determined by climatic constraints toward increasing aridity. Ratio between male and female shrubs did not differ from 1:1 in any population. Deviations from 1:1 between mature and non-mature plants were found in all populations, denoting population ageing. Very low seed viability was observed. A major part of described Juniperus navicularis populations have disappeared through direct habitat loss to urban development, loss of fitness in drier and warmer locations and low seed viability. This study is the first to address J. navicularis conservation, and represents a valuable first step toward this species preservation. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-12-30T17:18:35Z 2016-12-30 2016-01-01T00:00:00Z |
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://hdl.handle.net/10174/19465 http://hdl.handle.net/10174/19465 |
url |
http://hdl.handle.net/10174/19465 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Castro, M., Belo, A., Afonso, A., & Zavattieri, M. (2016). Juniperus navicularis - a study of Portuguese population structure and fitness. Lazaroa, 37, 31-41. doi:10.5209/LAZAROA.47929 http://revistas.ucm.es/index.php/LAZA/article/view/47929 ICAAM - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica CIMA_UE - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica afb@uevora.pt aafonso@uevora.pt zavattieri@uevora.pt 221 doi:10.5209/LAZAROA.47929 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Ediciones Complutense |
publisher.none.fl_str_mv |
Ediciones Complutense |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799136592674160640 |