10 documents found, page 1 of 1
Biased-corrected richness estimates for the Amazonian tree flora
ter Steege, Hans; Prado, Paulo I.; Lima, Renato A. F. de; Pos, Edwin; de Souza Coelho, Luiz; de Andrade Lima Filho, Diogenes; Salomão, Rafael P.Made available in DSpace on 2020-12-12T01:28:32Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-12-01; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); Amazonian 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 exten...
Rarity of monodominance in hyperdiverse Amazonian forests
ter Steege, Hans; Henkel, Terry W.; Helal, Nora; Marimon, Beatriz S.; Marimon-Junior, Ben Hur; Huth, Andreas; Groeneveld, Jürgen; Sabatier, DanielMade available in DSpace on 2020-12-12T01:40:04Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-12-01; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); 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 sam...
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,...
River damming affects seedling communities of a floodplain forest in the Centra...
Rocha, Maíra da; Feitosa, Yuri Oliveira; Wittmann, Florian; Piedade, Maria Teresa Fernandez; Resende, Angélica Faria de; Assis, Rafael Leandro deThe flood pulse of black water rivers in the Amazon basin determines the composition of species along the flood gradient in igapó forests. The Balbina dam, built on the Uatumã River, has altered the flood pulse and caused changes in the floristic composition of adult trees throughout the downstream area. There is a lack of studies on how communities of seedlings in igapó forests respond to changes in the flood ...
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 ...
Disentangling structural patterns of natural forest fragments in a savanna matr...
Amaral, Iêda Leão do; Magnusson, William Ernest; Matos, Francisca Dionízia de Almeida; Albernaz, Ana Luisa K.; Feitosa, Yuri OliveiraFragmentos naturais constituem importante fonte de recursos para o manejo e conservação da flora local. Este trabalho avaliou o efeito da fragmentação sobre a estrutura e a composição das comunidades de plantas de fragmentos florestais (FF), em Alter do Chão, na Amazônia oriental brasileira. Foram amostrados 25 sítios em FF e nove em floresta contínua (CF). Analisamos a diferença na densidade de plantas e na ri...
Composition, diversity and structure of vascular epiphytes in two contrasting C...
C., Quaresma, Adriano; Piedade, Maria Teresa Fernandez; Feitosa, Yuri Oliveira; Wittmann, Florian; Steege, Hans TerResearch focusing on assemblages of vascular epiphytes in the Amazon are scarce. This is especially true for Amazonian floodplain forests, for which only two previous studies have been published. We compared composition, richness and structure of epiphyte assemblages in white-water and black-water floodplains (várzea and igapó) in Central Amazonia in order to close knowledge gaps concerning the distribution and...
Composition, diversity and structure of vascular epiphytes in two contrasting C...
Quaresma, Adriano C.; Piedade, Maria Teresa F.; Feitosa, Yuri Oliveira; Wittmann, Florian; Steege, Hans terPesquisas com foco em assembléias de epífitos vasculares na Amazônia são escassas. Isso é especialmente verdadeiro para a Amazônia florestas de oviposição, para as quais apenas dois estudos anteriores foram publicados. Nós comparamos composição, riqueza e estrutura de assembléias epífitas em planícies de águas brancas e águas negras (várzea e igapó) Amazônia, a fim de preencher lacunas de conhecimento sobre a d...
Late Quaternary vegetation dynamics from central parts of the Madeira River in ...
Feitosa, Yuri Oliveira; Absy, Maria Lucia; Latrubesse, Edgardo Manuel [UNESP]; Stevaux, José Candido [UNESP]Made available in DSpace on 2015-10-22T06:22:17Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-01-01. Added 1 bitstream(s) on 2015-10-22T09:46:16Z : No. of bitstreams: 1 S0102-33062015000100120.pdf: 1541285 bytes, checksum: dad9b8a5524c127e7a7eac052c30ab37 (MD5); Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); The...