Journal Article•
The Estação Biológica de Santa Lúcia, Santa Teresa, Espírito Santo, Brazil.
01 Jan 2000-Boletim do Museu de Biologia Mello Leitão (Museu de Biologia Prof. Mello Leitão)-pp 7-34
About: This article is published in Boletim do Museu de Biologia Mello Leitão.The article was published on 2000-01-01 and is currently open access. It has received 26 citations till now. The article focuses on the topics: Species richness.
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TL;DR: The results suggest that self-compatibility is common for Bromeliaceae and do not support the traditional hypothesis of reproductive assurance used to explain the evolution of selfing.
Abstract: Co-occurring congener plant species in the highly diverse Atlantic forests of southeastern Brazil may act as natural laboratories for evaluating evolution of reproductive shifts. We assessed the breeding systems in a sympatric assemblage of bromeliad species and compiled literature available for the family to compare our experiments with available information. We performed controlled experiments of autonomous selfing, self- and cross-pollination in 40 species of 11 genera of two subfamilies that, in general, overlap their blooming period and share the same pollination vectors. We also tested for differences between self-compatible (SC) and self-incompatible (SI) species with regard to ecological factors such as abundance, co-flowering and co-occurrence. Most species experimentally tested and surveyed in the literature (75%) were SC. Species from the subfamily Tillandsioideae were predominantly SC, while Bromelioideae showed greater variation in breeding systems. About 43% of the species studied set fruits spontaneously in the absence of pollinator vectors. We found that SC species were the more abundant, were more frequently associated with other relatives and overlapped their blooming period with other species more than SI species. Thus, our results suggest that self-compatibility is common for Bromeliaceae and do not support the traditional hypothesis of reproductive assurance used to explain the evolution of selfing. We discuss self-compatibility as a reproductive isolating mechanism in the presence of pollen flow among sympatric congener species.
81 citations
Cites background from "The Estação Biológica de Santa Lúci..."
...A detailed description of SLBS can be found in Mendes and Padovan (2000)....
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TL;DR: The Atlantic rainforest in southeastern Brazil is one the main centers of diversification of Bromeliaceae, and a community of 42 sympatric bromeliad species, represented by nine genera, were surveyed to assess the role of microhabitat isolation, phenological isolation and ethological isolation as potential prezygotic barriers.
Abstract: The Atlantic rainforest in southeastern Brazil is one the main centers of diversification of Bromeliaceae. Empirical estimates of the relative importance of different pre- and postzygotic barriers to gene flow between recently diverged species are important for understanding speciation processes. While many bromeliad species easily hybridize in cultivation, few records of natural hybrids between closely related sympatric species suggest the existence of strong prezygotic barriers. A community of 42 sympatric bromeliad species, represented by nine genera (Aechmea, Billbergia, Edmundoa, Neoregelia, Nidularium, Quesnelia, Racinaea, Tillandsia, and Vriesea), were surveyed from 2004–2005 to assess the role of microhabitat isolation, phenological isolation and ethological isolation as potential prezygotic barriers. These bromeliads are abundant in the understory and frequently grow densely aggregated in multispecific patches that may facilitate promiscuous pollination. There was a large overlap of flowering periods even between congeneric species. Most species shared a similar assemblage of flower visitors; the hummingbird Rhamphodon naevius was the major visitor for 35 species. Only one putative hybrid was observed. This uncommonness of hybridization is puzzling, given that the prezygotic isolation mechanisms investigated are potentially weak to effectively avoid interspecific pollination.
60 citations
Cites background from "The Estação Biológica de Santa Lúci..."
...A detailed description of SLBS can be found in Mendes and Padovan (2000)....
[...]
01 Jan 2006
TL;DR: The family Melastomataceae presents 12 genera and 57 species at the "Estacao Biologica de Santa Lucia", Santa Teresa, Espirito Santo, Brazil, with Miconia being the richest genus, followed by Leandra with 21 species.
Abstract: Synopsis of the family Melastomataceae in the "Estacao Biologica de Santa Lucia", Santa Teresa, Espirito Santo, Brazil. The family Melastomataceae presents 12 genera and 57 species at the "Estacao Biologica de Santa Lucia". Miconia is the richest genus, with 21 species, followed by Leandra (12), Tibouchina (6), Mouriri and Clidemia (4 species each), Ossaea (3), Meriania (2) and Aciotis, Bertolonia, Dolichoura, Huberia and Rhynchanthera (all with one species each). We provide identification keys and collection lists for these species.
46 citations
TL;DR: The tree changes of montane forest at the Santa Lúcia Biological Station, southeastern Brazil, were analyzed using two surveys separated by an interval of 11 years with the aim of confirming the patterns of stability of structure and diversity over time.
Abstract: The tree changes of 1.02 ha of montane forest at the Santa Lucia Biological Station, southeastern Brazil, were analyzed using two surveys separated by an interval of 11 years with the aim of confirming the patterns of stability of structure and diversity over time. In the original survey all trees with diameter at breast height ≥6.4 cm were sampled. In second survey (this study), dead trees, survivors and recruits in the same forest were reported. The data suggest a dynamic balance of the forest structure because mortality (−1.06% year−1 for number of trees and −0.85% year−1 for basal area) was very close to recruitment (0.89% year−1) and ingrowth (1.05% year−1). The high diversity of the original survey (H′ > 5.2) was maintained by the turnover species. The main tree populations also showed stability of number of trees and basal area. This pattern was shared by most of the 28 local endemic species, ensuring the maintenance of their populations in the plot.
42 citations
Cites background from "The Estação Biológica de Santa Lúci..."
...The average annual temperature at the site is 20 C and the average annual rainfall (influenced by orographic rainfall) is 1868 mm. November is the wettest month and June is the only month of the year with precipitation below 60 mm (Mendes and Padovan 2000)....
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...Besides this, several research projects have recorded high levels of local biodiversity in this region (Mendes and Padovan 2000)....
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TL;DR: This study highlights the importance of primary forest for bromeliad and leaf-litter breeders and proposes that water-body breeders use edge and matrix habitats to reach breeding habitats along the valleys.
Abstract: Understanding the response of species with differing life-history traits to habitat edges and habitat conversion helps predict their likelihood of persistence across changing landscape. In Brazil’s Atlantic Forest, we evaluated frog richness and abundance by breeding guild at four distances from the edge of a reserve: i) 200 m inside the forest, ii) 50 m inside the forest, iii) at the forest edge, and iv) 50 m inside three different converted habitats (coffee plantation, non-native Eucalyptus plantation, and abandoned pastures, hereafter matrix types). By sampling a dry and a wet season, we recorded 622 individual frogs representing 29 species, of which three were undescribed. Breeding guild (i.e. bromeliad, leaf-litter, and water-body breeders) was the most important variable explaining frog distributions in relation to edge effects and matrix types. Leaf-litter and bromeliad breeders decreased in richness and abundance from the forest interior toward the matrix habitats. Water-body breeders increased in richness toward the matrix and remained relatively stable in abundance across distances. Number of large trees (i.e. DBH > 15 cm) and bromeliads best explained frog richness and abundance across distances. Twenty species found in the interior of the forest were not found in any matrix habitat. Richness and abundance across breeding guilds were higher in the rainy season but frog distributions were similar across the four distances in the two seasons. Across matrix types, leaf-litter species primarily used Eucalyptus plantations, whereas water-body species primarily used coffee plantations. Bromeliad breeders were not found inside any matrix habitat. Our study highlights the importance of primary forest for bromeliad and leaf-litter breeders. We propose that water-body breeders use edge and matrix habitats to reach breeding habitats along the valleys. Including life-history characteristics, such as breeding guild, can improve predictions of frog distributions in response to edge effect and matrix types, and can guide more effective management and conservation actions.
28 citations