Artigo

Cryptic species in Pagamea coriacea sensu lato (Rubiaceae): evidence from morphology, ecology and reproductive behavior in a sympatric context

In this study we explore morphological and ecological variation in sympatric populations of Pagamea coriacea s.l. - a species complex from white-sand vegetation in the Amazon. A total of 147 trees were sampled and monitored at three nearby sites in Central Amazon, Brazil. Multivariate analyses of mo...

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Autor principal: Esteves, Samantha de Miranda
Outros Autores: Vicentini, Alberto
Grau: Artigo
Idioma: English
Publicado em: Acta Amazonica 2020
Assuntos:
Population Ecology
Species Delimitation
Reproductive System Variation
White-sand Forests
Amazon
Ecologia De Populações
Delimitação De Espécies
Variação Em Sistema Reprodutivo
Campinarana
Amazônia
Acesso em linha: https://repositorio.inpa.gov.br/handle/1/13529
id oai:repositorio:1-13529
recordtype dspace
spelling oai:repositorio:1-13529 Cryptic species in Pagamea coriacea sensu lato (Rubiaceae): evidence from morphology, ecology and reproductive behavior in a sympatric context Espécies crípticas em Pagamea coriacea sensu lato (Rubiaceae): evidências morfológicas, ecológicas e de comportamento reprodutivo em um contexto simpátrico Esteves, Samantha de Miranda Vicentini, Alberto Population Ecology Species Delimitation Reproductive System Variation White-sand Forests Amazon Ecologia De Populações Delimitação De Espécies Variação Em Sistema Reprodutivo Campinarana Amazônia In this study we explore morphological and ecological variation in sympatric populations of Pagamea coriacea s.l. - a species complex from white-sand vegetation in the Amazon. A total of 147 trees were sampled and monitored at three nearby sites in Central Amazon, Brazil. Multivariate analyses of morphology indicated two distinct groups (A and B), which also differed in bark type, each containing subgroups associated with sexual dimorphism. However, a single hermaphroditic individual was observed within group B. As expected, all pistillate plants produced fruits, but 23% of the staminate plants of group B, and 5% of group A also produced fruits. This variation suggests that the sexual systems of both groups are between dioecy and gynodioecy. There was an overlap in flowering phases between the two groups, but the pattern of floral maturation differed. Ecologically, plants of group B were found in more shaded habitats and over sandstone bedrocks, while group A was prevalent in deeper sandy soils as canopy plants. The significances of morphological and environmental differences were tested by a multivariate analysis of variance, and a canonical discriminant analysis assessed the importance of variables. The coexistence in sympatry of two discrete morphological groups in the P. coriacea s.l., with different habitat preferences and reproductive behaviors, indicates they represent distinct species. O objetivo deste estudo foi testar se o complexo de espécies Pagamea coriacea inclui múltiplas espécies, usando evidências morfológicas, ecológicas e de comportamento reprodutivo. Um total de 147 árvores foram amostradas e monitoradas em três locais próximos na Amazônia Central, Brasil. Análises multivariadas de dados morfológicos indicaram dois grupos discretos (A e B), que coincidem com diferenças no tipo de casca, cada um por sua vez com subgrupos que representam dimorfismo sexual. Contudo, um indivíduo distintamente hermafrodita foi encontrado no grupo B. Todas as plantas pistiladas produziram frutos, mas também foram observados frutos para 23% das plantas estaminadas do grupo B, e para 5% das estaminadas do grupo A. Essa variação sugere que ambos grupos possuem um sistema sexual entre dioicia e ginodioicia. Houve sobreposição das fases de floração e frutificação entre os dois grupos, mas o padrão de maturação de flores foi diferente. Quanto ao hábitat, o grupo B predominou em situações de sombra e em solos arenosos rasos sobre lajes de pedra, enquanto o grupo A ocorreu em solos arenosos mais profundos e no dossel da vegetação. A coexistência de dois grupos morfológicos discretos no complexo P. coriacea s.l., com diferenças ecológicas e de comportamento reprodutivo, indica que correspondem a duas espécies distintas. 2020-04-24T15:28:55Z 2020-04-24T15:28:55Z 2013 Artigo https://repositorio.inpa.gov.br/handle/1/13529 10.1590/S0044-59672013000400003 en Volume 43, Número 4, Pags. 415-428 Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf Acta Amazonica
institution Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional
collection INPA-RI
language English
topic Population Ecology
Species Delimitation
Reproductive System Variation
White-sand Forests
Amazon
Ecologia De Populações
Delimitação De Espécies
Variação Em Sistema Reprodutivo
Campinarana
Amazônia
spellingShingle Population Ecology
Species Delimitation
Reproductive System Variation
White-sand Forests
Amazon
Ecologia De Populações
Delimitação De Espécies
Variação Em Sistema Reprodutivo
Campinarana
Amazônia
Esteves, Samantha de Miranda
Cryptic species in Pagamea coriacea sensu lato (Rubiaceae): evidence from morphology, ecology and reproductive behavior in a sympatric context
topic_facet Population Ecology
Species Delimitation
Reproductive System Variation
White-sand Forests
Amazon
Ecologia De Populações
Delimitação De Espécies
Variação Em Sistema Reprodutivo
Campinarana
Amazônia
description In this study we explore morphological and ecological variation in sympatric populations of Pagamea coriacea s.l. - a species complex from white-sand vegetation in the Amazon. A total of 147 trees were sampled and monitored at three nearby sites in Central Amazon, Brazil. Multivariate analyses of morphology indicated two distinct groups (A and B), which also differed in bark type, each containing subgroups associated with sexual dimorphism. However, a single hermaphroditic individual was observed within group B. As expected, all pistillate plants produced fruits, but 23% of the staminate plants of group B, and 5% of group A also produced fruits. This variation suggests that the sexual systems of both groups are between dioecy and gynodioecy. There was an overlap in flowering phases between the two groups, but the pattern of floral maturation differed. Ecologically, plants of group B were found in more shaded habitats and over sandstone bedrocks, while group A was prevalent in deeper sandy soils as canopy plants. The significances of morphological and environmental differences were tested by a multivariate analysis of variance, and a canonical discriminant analysis assessed the importance of variables. The coexistence in sympatry of two discrete morphological groups in the P. coriacea s.l., with different habitat preferences and reproductive behaviors, indicates they represent distinct species.
format Artigo
author Esteves, Samantha de Miranda
author2 Vicentini, Alberto
author2Str Vicentini, Alberto
title Cryptic species in Pagamea coriacea sensu lato (Rubiaceae): evidence from morphology, ecology and reproductive behavior in a sympatric context
title_short Cryptic species in Pagamea coriacea sensu lato (Rubiaceae): evidence from morphology, ecology and reproductive behavior in a sympatric context
title_full Cryptic species in Pagamea coriacea sensu lato (Rubiaceae): evidence from morphology, ecology and reproductive behavior in a sympatric context
title_fullStr Cryptic species in Pagamea coriacea sensu lato (Rubiaceae): evidence from morphology, ecology and reproductive behavior in a sympatric context
title_full_unstemmed Cryptic species in Pagamea coriacea sensu lato (Rubiaceae): evidence from morphology, ecology and reproductive behavior in a sympatric context
title_sort cryptic species in pagamea coriacea sensu lato (rubiaceae): evidence from morphology, ecology and reproductive behavior in a sympatric context
publisher Acta Amazonica
publishDate 2020
url https://repositorio.inpa.gov.br/handle/1/13529
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score 11.755432

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