7 documents found, page 1 of 1
Biased-corrected richness estimates for the Amazonian tree flora
ter Steege, H.; Prado, Paulo I.; Lima, Renato A.Fde; Pos, Edwin T.; Coelho, Luiz Souza de; Lima Filho, Diógenes de Andrade; Salomão, Rafael PaivaAmazonian forests are extraordinarily diverse, but the estimated species richness is very much debated. Here, we apply an ensemble of parametric estimators and a novel technique that includes conspecific spatial aggregation to an extended database of forest plots with up-to-date taxonomy. We show that the species abundance distribution of Amazonia is best approximated by a logseries with aggregated individuals,...
Formations of coastal forests in the Amazon and ecological relations with vascu...
Quaresma, Adriano Costa; Jardim, Mário Augusto GonçalvesWas investigated the vascular epiphytes and relate it to the composition and structure of the arboreal component in two formations of coastal forests in the Algodoal-Maiandeua Environmental Protetion Area, Maracanã, Pará, Brazil. We demarcated four 50m x 50m parcels (two in a dry forest and two in a flooding forest). Were registered and identified all the vascular epiphytes as well as their phorophytes. The abu...
Species Distribution Modelling: Contrasting presence-only models with plot abun...
Gomes, Vitor H.F.; IJff, Stéphanie D.; Raes, Niels; Amaral, Iêda Leão do; Salomão, Rafael Paiva; Coelho, Luiz Souza deSpecies distribution models (SDMs) are widely used in ecology and conservation. Presence-only SDMs such as MaxEnt frequently use natural history collections (NHCs) as occurrence data, given their huge numbers and accessibility. NHCs are often spatially biased which may generate inaccuracies in SDMs. Here, we test how the distribution of NHCs and MaxEnt predictions relates to a spatial abundance model, based on ...
Rarity of monodominance in hyperdiverse Amazonian forests
ter Steege, H.; Henkel, Terry W.; Helal, Nora; Marimon, Beatriz Schwantes; Marimon Júnior, Ben Hur; Huth, Andreas; Groeneveld, Jürgen J.Tropical forests are known for their high diversity. Yet, forest patches do occur in the tropics where a single tree species is dominant. Such “monodominant” forests are known from all of the main tropical regions. For Amazonia, we sampled the occurrence of monodominance in a massive, basin-wide database of forest-inventory plots from the Amazon Tree Diversity Network (ATDN). Utilizing a simple defining metric ...
Floristic composition and spatial distribution of vascular epiphytes in the res...
Quaresma, Adriano Costa; Jardim, Mário Augusto GonçalvesAs epífitas vasculares constituem uma forma de vida que é importante para manter a diversidade biológica dos ecossistemas florestais, porque eles fornecem recursos alimentares e microambientes especializados para a fauna no dossel da floresta. Este estudo objetivou descrever a composição florística e os aspectos ecológicos das epífitas vasculares ocorrentes nas restingas (bosques costeiros) dentro da Área Ambie...
Formations of coastal forests in the amazon and ecological relations with vascu...
Quaresma, Adriano Costa; Jardim, Mário Augusto G.O objetivo foi investigar a flora de epífitas vasculares e relacionar com a composição e a estrutura do componente arbóreo em duas formações florestais de restinga. Foram demarcadas quatro parcelas de 50m x 50m (duas em floresta de restinga seca e duas em floresta de restinga inundável) e registradas as epífitas vasculares bem como seus respectivos forófitos. A abundância e riqueza de epífitas sobre a comunidad...
Forófitos preferenciais de orquídeas epífitas na APA Ilha do Combu, Belém, Pará...
Medeiros, Tonny David Santiago; Jardim, Mário Augusto Gonçalves; Quaresma, Adriano CostaFoi avaliada a correlação da abundância de orquídeas epífitas com o tipo de casca dos forófitos e a influência do DAP sobre a abundância e a riqueza na Área de Proteção Ambiental (APA) Ilha do Combu, Belém, Pará, Brasil. O estudo foi realizado em 2,85 ha, a partir da demarcação de 114 transectos de 5 m x 50 m, onde foram mensurados todos os forófitos com DAP ≥ 20 cm e anotadas as características da casca, e ide...