Floristic composition, structure and species-area relationships on a neotropical inselberg in southeastern Brazil

Abstract The inselberg vegetation, in general, occurs in patches that vary in size, shape, number of plant species and are surrounded by a bare rock. The present study evaluated the species composition, structural analysis, and species-area relationships of vegetation patches on a neotropical inselb...

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Main Authors: Dayvid Rodrigues Couto, Mauricio Lima Dan, Willian Moura Aguiar, João Marcelo Alvarenga Braga, Marcelo Trindade Nascimento
Format: Article
Language:English
Published: Instituto de Pesquisas Jardim Botânico do Rio de Janeiro 2021-12-01
Series:Rodriguésia
Subjects:
Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2175-78602021000100300&tlng=en
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author Dayvid Rodrigues Couto
Mauricio Lima Dan
Willian Moura Aguiar
João Marcelo Alvarenga Braga
Marcelo Trindade Nascimento
author_facet Dayvid Rodrigues Couto
Mauricio Lima Dan
Willian Moura Aguiar
João Marcelo Alvarenga Braga
Marcelo Trindade Nascimento
author_sort Dayvid Rodrigues Couto
collection DOAJ
description Abstract The inselberg vegetation, in general, occurs in patches that vary in size, shape, number of plant species and are surrounded by a bare rock. The present study evaluated the species composition, structural analysis, and species-area relationships of vegetation patches on a neotropical inselberg in Rio de Janeiro state, southeastern Brazil. A total of 69 vascular plant species, from 31 families, were sampled in 84 vegetation patches varying in area from 0.02 to 500 m2, totaling 0.33 ha. Fabaceae and Cactaceae were the most representative families. Vellozia plicata and Selaginella sellowii presented the highest relative frequencies, relative dominances and importance values and were the most successful in the colonization of the studied rocky outcrop. A linear regression showed a positive correlation between patch size and species richness. Phanerophytes were the predominant life-form, with small patches being less rich in species and dominated by Selaginella mats. Our results suggest that the vegetation patches on the “Morro do Itaoca” inselberg currently represent a refuge against fire and other anthropogenic disturbances for many typical species of the surrounding matrix. In addition, the locality is home to endemic and endangered species, which reinforces its importance for conservation actions.
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spelling doaj.art-fc532d1d8d34454faa5e3b27ff03de692022-12-21T21:23:29ZengInstituto de Pesquisas Jardim Botânico do Rio de JaneiroRodriguésia2175-78602021-12-017210.1590/2175-7860202172114Floristic composition, structure and species-area relationships on a neotropical inselberg in southeastern BrazilDayvid Rodrigues Coutohttps://orcid.org/0000-0002-9563-8001Mauricio Lima Danhttps://orcid.org/0000-0002-1483-081XWillian Moura Aguiarhttps://orcid.org/0000-0002-2825-8623João Marcelo Alvarenga Bragahttps://orcid.org/0000-0002-6124-1970Marcelo Trindade Nascimentohttps://orcid.org/0000-0003-4492-3344Abstract The inselberg vegetation, in general, occurs in patches that vary in size, shape, number of plant species and are surrounded by a bare rock. The present study evaluated the species composition, structural analysis, and species-area relationships of vegetation patches on a neotropical inselberg in Rio de Janeiro state, southeastern Brazil. A total of 69 vascular plant species, from 31 families, were sampled in 84 vegetation patches varying in area from 0.02 to 500 m2, totaling 0.33 ha. Fabaceae and Cactaceae were the most representative families. Vellozia plicata and Selaginella sellowii presented the highest relative frequencies, relative dominances and importance values and were the most successful in the colonization of the studied rocky outcrop. A linear regression showed a positive correlation between patch size and species richness. Phanerophytes were the predominant life-form, with small patches being less rich in species and dominated by Selaginella mats. Our results suggest that the vegetation patches on the “Morro do Itaoca” inselberg currently represent a refuge against fire and other anthropogenic disturbances for many typical species of the surrounding matrix. In addition, the locality is home to endemic and endangered species, which reinforces its importance for conservation actions.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2175-78602021000100300&tlng=enAtlantic Forestconservationendangered specieslife formsrock outcrops
spellingShingle Dayvid Rodrigues Couto
Mauricio Lima Dan
Willian Moura Aguiar
João Marcelo Alvarenga Braga
Marcelo Trindade Nascimento
Floristic composition, structure and species-area relationships on a neotropical inselberg in southeastern Brazil
Rodriguésia
Atlantic Forest
conservation
endangered species
life forms
rock outcrops
title Floristic composition, structure and species-area relationships on a neotropical inselberg in southeastern Brazil
title_full Floristic composition, structure and species-area relationships on a neotropical inselberg in southeastern Brazil
title_fullStr Floristic composition, structure and species-area relationships on a neotropical inselberg in southeastern Brazil
title_full_unstemmed Floristic composition, structure and species-area relationships on a neotropical inselberg in southeastern Brazil
title_short Floristic composition, structure and species-area relationships on a neotropical inselberg in southeastern Brazil
title_sort floristic composition structure and species area relationships on a neotropical inselberg in southeastern brazil
topic Atlantic Forest
conservation
endangered species
life forms
rock outcrops
url http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2175-78602021000100300&tlng=en
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