Population structure and one-year dynamics of the endangered tropical tree species Caesalpinia echinata Lam. (Brazilian red-wood): the potential importance of small fragments for conservation
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Rodriguésia (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2175-78602009000100211 |
Resumo: | ABSTRACT Caesalpinia echinata Lam. an endangered species, occurs in forest fragments of the Cabo Frio region, in Rio de Janeiro, Brazil. Data from four sub-populations were used to describe local population patterns and one-year dynamics. In each subpopulation, 0.1 ha-plots were set up and all C. echinata trees were mapped, and diameter and height were measured. The fragments sampled had different sizes and were subjected to various degrees of man-made disturbance, representing a succession gradient from an earlier (small fragment) to a later stage (large fragment). We compared the sub-populations as regards density, size structure, spatial distribution, germination and mortality, to identify short-term responses to mechanical injuries (broken stems, sand burial and man-made cuts). Matrix analysis considering the four C. echinata sub-populations together showed a slight tendency for population expansion (λ = 1.0211) if injury patterns do not lead to habitat extinction. On the other hand, sub-populations showed aggregated distribution patterns, particularly at forest edges. Diameter size structure varied from a reversed-J pattern, i.e. seedling abundance in the small fragment (more impacted sub-population) to a uniform plant distribution of size classes in the large one (less impacted sub-population). The sub-population in the smallest fragment showed the highest birth and mortality, in contrast to reduced demographic variation in the largest fragment. Moreover, the smallest fragment also showed the largest seedling stand density and biomass. These data indicate the potential importance of small fragments for the conservation of the Brazilian red-wood. |
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Population structure and one-year dynamics of the endangered tropical tree species Caesalpinia echinata Lam. (Brazilian red-wood): the potential importance of small fragments for conservationAtlantic forestCabo Frio regionfragmentationpopulation structurematrix analysisABSTRACT Caesalpinia echinata Lam. an endangered species, occurs in forest fragments of the Cabo Frio region, in Rio de Janeiro, Brazil. Data from four sub-populations were used to describe local population patterns and one-year dynamics. In each subpopulation, 0.1 ha-plots were set up and all C. echinata trees were mapped, and diameter and height were measured. The fragments sampled had different sizes and were subjected to various degrees of man-made disturbance, representing a succession gradient from an earlier (small fragment) to a later stage (large fragment). We compared the sub-populations as regards density, size structure, spatial distribution, germination and mortality, to identify short-term responses to mechanical injuries (broken stems, sand burial and man-made cuts). Matrix analysis considering the four C. echinata sub-populations together showed a slight tendency for population expansion (λ = 1.0211) if injury patterns do not lead to habitat extinction. On the other hand, sub-populations showed aggregated distribution patterns, particularly at forest edges. Diameter size structure varied from a reversed-J pattern, i.e. seedling abundance in the small fragment (more impacted sub-population) to a uniform plant distribution of size classes in the large one (less impacted sub-population). The sub-population in the smallest fragment showed the highest birth and mortality, in contrast to reduced demographic variation in the largest fragment. Moreover, the smallest fragment also showed the largest seedling stand density and biomass. These data indicate the potential importance of small fragments for the conservation of the Brazilian red-wood.Instituto de Pesquisas Jardim Botânico do Rio de Janeiro2009-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2175-78602009000100211Rodriguésia v.60 n.1 2009reponame:Rodriguésia (Online)instname:Instituto de Pesquisas Jardim Botânico do Rio de Janeiro (JBRJ)instacron:JBRJ10.1590/2175-7860200960112info:eu-repo/semantics/openAccessRodrigues,Pablo José Francisco PenaAbreu,Rodolfo Cesar Real deBarcellos,Eduardo M. B.Lima,Haroldo Cavalcante deScarano,Fabio Rubioeng2018-01-19T00:00:00Zoai:scielo:S2175-78602009000100211Revistahttp://rodriguesia.jbrj.gov.br/https://old.scielo.br/oai/scielo-oai.phprodriguesia@jbrj.gov.br2175-78600370-6583opendoar:2018-01-19T00:00Rodriguésia (Online) - Instituto de Pesquisas Jardim Botânico do Rio de Janeiro (JBRJ)false |
dc.title.none.fl_str_mv |
Population structure and one-year dynamics of the endangered tropical tree species Caesalpinia echinata Lam. (Brazilian red-wood): the potential importance of small fragments for conservation |
title |
Population structure and one-year dynamics of the endangered tropical tree species Caesalpinia echinata Lam. (Brazilian red-wood): the potential importance of small fragments for conservation |
spellingShingle |
Population structure and one-year dynamics of the endangered tropical tree species Caesalpinia echinata Lam. (Brazilian red-wood): the potential importance of small fragments for conservation Rodrigues,Pablo José Francisco Pena Atlantic forest Cabo Frio region fragmentation population structure matrix analysis |
title_short |
Population structure and one-year dynamics of the endangered tropical tree species Caesalpinia echinata Lam. (Brazilian red-wood): the potential importance of small fragments for conservation |
title_full |
Population structure and one-year dynamics of the endangered tropical tree species Caesalpinia echinata Lam. (Brazilian red-wood): the potential importance of small fragments for conservation |
title_fullStr |
Population structure and one-year dynamics of the endangered tropical tree species Caesalpinia echinata Lam. (Brazilian red-wood): the potential importance of small fragments for conservation |
title_full_unstemmed |
Population structure and one-year dynamics of the endangered tropical tree species Caesalpinia echinata Lam. (Brazilian red-wood): the potential importance of small fragments for conservation |
title_sort |
Population structure and one-year dynamics of the endangered tropical tree species Caesalpinia echinata Lam. (Brazilian red-wood): the potential importance of small fragments for conservation |
author |
Rodrigues,Pablo José Francisco Pena |
author_facet |
Rodrigues,Pablo José Francisco Pena Abreu,Rodolfo Cesar Real de Barcellos,Eduardo M. B. Lima,Haroldo Cavalcante de Scarano,Fabio Rubio |
author_role |
author |
author2 |
Abreu,Rodolfo Cesar Real de Barcellos,Eduardo M. B. Lima,Haroldo Cavalcante de Scarano,Fabio Rubio |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Rodrigues,Pablo José Francisco Pena Abreu,Rodolfo Cesar Real de Barcellos,Eduardo M. B. Lima,Haroldo Cavalcante de Scarano,Fabio Rubio |
dc.subject.por.fl_str_mv |
Atlantic forest Cabo Frio region fragmentation population structure matrix analysis |
topic |
Atlantic forest Cabo Frio region fragmentation population structure matrix analysis |
description |
ABSTRACT Caesalpinia echinata Lam. an endangered species, occurs in forest fragments of the Cabo Frio region, in Rio de Janeiro, Brazil. Data from four sub-populations were used to describe local population patterns and one-year dynamics. In each subpopulation, 0.1 ha-plots were set up and all C. echinata trees were mapped, and diameter and height were measured. The fragments sampled had different sizes and were subjected to various degrees of man-made disturbance, representing a succession gradient from an earlier (small fragment) to a later stage (large fragment). We compared the sub-populations as regards density, size structure, spatial distribution, germination and mortality, to identify short-term responses to mechanical injuries (broken stems, sand burial and man-made cuts). Matrix analysis considering the four C. echinata sub-populations together showed a slight tendency for population expansion (λ = 1.0211) if injury patterns do not lead to habitat extinction. On the other hand, sub-populations showed aggregated distribution patterns, particularly at forest edges. Diameter size structure varied from a reversed-J pattern, i.e. seedling abundance in the small fragment (more impacted sub-population) to a uniform plant distribution of size classes in the large one (less impacted sub-population). The sub-population in the smallest fragment showed the highest birth and mortality, in contrast to reduced demographic variation in the largest fragment. Moreover, the smallest fragment also showed the largest seedling stand density and biomass. These data indicate the potential importance of small fragments for the conservation of the Brazilian red-wood. |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009-03-01 |
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=S2175-78602009000100211 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2175-78602009000100211 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/2175-7860200960112 |
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 |
Instituto de Pesquisas Jardim Botânico do Rio de Janeiro |
publisher.none.fl_str_mv |
Instituto de Pesquisas Jardim Botânico do Rio de Janeiro |
dc.source.none.fl_str_mv |
Rodriguésia v.60 n.1 2009 reponame:Rodriguésia (Online) instname:Instituto de Pesquisas Jardim Botânico do Rio de Janeiro (JBRJ) instacron:JBRJ |
instname_str |
Instituto de Pesquisas Jardim Botânico do Rio de Janeiro (JBRJ) |
instacron_str |
JBRJ |
institution |
JBRJ |
reponame_str |
Rodriguésia (Online) |
collection |
Rodriguésia (Online) |
repository.name.fl_str_mv |
Rodriguésia (Online) - Instituto de Pesquisas Jardim Botânico do Rio de Janeiro (JBRJ) |
repository.mail.fl_str_mv |
rodriguesia@jbrj.gov.br |
_version_ |
1752128669665460224 |