Duas novas ocorrências de Orchidaceae para a flora Brasileira

Silva, Manoela Ferreira F da; Silva, Joao Batista F. da

doi:10.1590/1809-43922000302186

Cited by 3 publications

(3 citation statements)

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“…Na Amazônia brasileira, os trabalhos mais relevantes são os de Braga (1977de Braga ( , 1978, Silva & Silva (1998, Ribeiro et al (1999), Monteiro et al (2009) e os de Silva & Oliveira (1999, 2000. Para o Estado do Pará, destacam-se os estudos de Silveira et al (1995), com inventário das espécies da Serra dos Carajás; o de Atzingen et al (1996), com a flora orquidológica da Serra das Andorinhas, município de São Geraldo do Araguaia; o de IlkiuBorges & Cardoso (1996), com notas preliminares sobre a flora orquidológica do Pará; e os de Cardoso et al (1995) e Medeiros et al (2009), com listas das orquídeas da Ilha do Combu, município de Acará.…”

Section: Introductionunclassified

Sinopse das Orchidaceae holoepífitas e hemiepífitas da Floresta Nacional de Caxiuanã, PA, Brasil

Koch

Santos

Ilkiu–Borges

2014

Hoehnea

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-(Synopsis of the holoepiphyte and hemiepiphyte Orchidaceae of Floresta Nacional de Caxiuanã, Pará State, Brazil). This study reports the floristic survey of holoepiphyte and hemiepiphyte Orchidaceae in Caxiuanã National Forest, located between municipalities of Melgaço and Portel, near the Marajó area, Pará State, Brazil. Four random excursions for collecting fertile material were taken between April 2009 and November 2010. The family is represented by 33 species and 24 genera in Floresta Nacional de Caxiuanã. The most representative genera were Epidendrum, Scaphyglottis, Catasetum, Encyclia, and Polystachya; other genera were represented by only one species each.

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Section: Introductionunclassified

Sinopse das Orchidaceae holoepífitas e hemiepífitas da Floresta Nacional de Caxiuanã, PA, Brasil

Koch

Santos

Ilkiu–Borges

2014

Hoehnea

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“…Identify the occurrence of orchids in different environments has led to an enhance of biodiversity in many Brazilian regions. In the case of orchids, these studies may indicate the status of species conservation, epiphytic characteristics of most tropical orchids, pointing that deforestation changes the preservation of genotypes on natural environments (CARDOSO and ISRAEL, 2005;SILVA and SILVA, 2000;STORTI et al, 2011). The results of orchid surveys may also provide information of the species reproductive biology , which represents a strong concerning when the intention is to obtain propagative material for economic purposes.…”

Section: Introductionmentioning

confidence: 98%

Orchid diversity at a residual plateu on Caroebe, Roraima

Luz¹,

Oliveira²,

Silva

2016

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Orchids were observed in a granitic mountain hill at the, Caroebe road 35, Roraima, at February and June of 2016. It was observed the occurrence of orchids in three different points: the base of the mountain, with typical humid tropical dry land forest; the forest around the rocky top of the mountain, with the presence of thin trees about 15 meters high, medium light entrance below the vegetation; and the granitic plateau, more sun incidence and surrounded by small shrubs. The total area surveyed was of 5 hectares. The orchids encountered in the whole trail were prior identified locally, just as their localization by GPS and according to their growth habit (epiphytic, terrestrial or rupicolous). It was found 28 species. The majority of the indivíduals identified in this survey were found on organic layers accumulated over the granitic rock, as follow: Catasetum planiceps, Catasetum discolor, Cyrtopodium andersonii, Encyclia granitica, Epidendrum ibaguense, Epidendrum viviparum, Cleistes rosea e Nohawilliamsia pirarensis. At the forest that surrounds the rocky hill it was observed, associated to small trees, the following epiphyte orchids: Dimerandra emarginata, Octomeria sp., Scaphyglottis sickii, Trigonidium acuminatum and Cattleya violacea. At the forest covering the base of the mountain it was found the larger number of species (13), with predominance of epiphytes. Besides the larger number found, the frequency of these species was very low, except for Camaridium ochroleucum and Heterotaxis superflua that were found in larger quantity associated to some sort of trees. The specie Liparis nervosa was found only associated to the base of a unique tree, over the organic matter accumulated locally. The large number of orchids found in the study area indicates its importance for more comprehensive studies and stresses the importance for conservation.

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“…Orchidaceae are one of the largest families of plants with about 24.500 species (Dressler, 2005) and 725 genera (Dressler, 1993), it is represented by 764 species within the Brazilian portion of the Amazon region (Barros et al 2013). However, Silva and Silva (2000) pointed out that additional collection efforts along the border with the Guyanas and Venezuela (Guayana Shield), the upper courses of rivers, and the central inaccessible areas could result in an increase to the already rich orchid flora.…”

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confidence: 99%