Ricardo de Oliveira Perdiz

Universidade Federal de Roraima (UFRR) · Programa de pós-graduação em Recursos Naturais (PRONAT)

Aristolochia comprises about 450 species, occurring mainly in tropical regions. Here, we record for the first time Aristolochia wankeana in Brazil, specifically in two municipalities in the state of Amazonas (Presidente Figueiredo and Rio Preto da Eva). Previously, this species had only been recorded in Guyana and French Guiana. We provide the spec...

The lack of synthesized information regarding biodiversity is a major problem among researchers, leading to a pervasive cycle where ecologists make field campaigns to collect information that already exists and yet has not been made available for a broader audience. This problem leads to long-lasting effects in public policies such as spending mone...

The lack of synthesized information regarding biodiversity is a major problem among researchers, leading to a pervasive cycle where ecologists make field campaigns to collect information that already exists and yet has not been made available for a broader audience. This problem leads to long-lasting effects in public policies such as spending mone...

Cyrtocarpa is a generic name that has been applied to members of a complex of dry-habitat Neotropical taxa, but recent investigations have revealed that in fact this group represents three distinct genera. Tumultivenia and Uniostium, two new genera of Anacardiaceae-Spondioideae, are described and illustrated, as is one new species, Cyrtocarpa carib...

Graphical abstract Highlights d Ecological metadata were compiled for 7,694 sites across the Brazilian Amazon d Accessibility and proximity to research facilities influenced research probability d Knowledge gaps are greater in uplands than in wetlands and aquatic habitats d Undersampled areas overlap predicted hotspots of climate change and defores...

For more than three decades, major efforts in sampling and analyzing tree diversity in South America have focused almost exclusively on trees with stems of at least 10 and 2.5 cm diameter, showing highest species diversity in the wetter western and northern Amazon forests. By contrast, little attention has been paid to patterns and drivers of diver...

Wood density (WD) is an important functional trait of tree species. Understanding spatial WD variability as a function of environmental determinants improves our ability to estimate carbon stocks in the woody biomass of tropical forests. However, the role of each environmental variable affecting the in-tra-and interspecific variability of WD is not...

A Floresta Nacional do Tapajós (Flona Tapajós) é uma unidade de conservação (UC) de uso sustentável criada através do Decreto n° 73.684, de 19 de fevereiro de 1974. Delimitada a oeste pelo rio Tapajós e a leste pela rodovia BR-163, ao longo de sua história sua área original foi modificada diversas vezes, possuindo atualmente 527.319 hectares locali...

Serviços ambientais são processos naturais que têm a capacidade de prover bens (p. ex. alimentos, madeira) e serviços (p. ex. estoque de carbono, polinização) que satisfazem necessidades humanas e são mantidos pela adoção de práticas de manejo dos recursos naturais. Considerando o papel histórico, econômico e social dos castanhais nativos, este tra...

The genus Scaphyglottis Poepp. & Endl. presents 78 species and occurs from Mexico to Brazil. Scaphyglottis punctulata (Rchb.f.) C.Schweinf. is known from various high elevation locations from Panama to Bolivia. Here, we report new records in two regions of the Brazil portion of the Guiana Shield. We provide a detailed description, photographic plat...

The harvesting of açaí berries (palm fruits from the genus Euterpe) in Amazonia has increased over the last 20 years due to a high local and global market demand and triggered by their widely acclaimed health benefits as a ‘superfood’. Although such increase represents a financial boom for local communities, unregulated extraction in Amazonia risks...

This review of Neotropical Burseraceae emphasizes developments since the last major review of the family in 2011. The Burseraceae comprise a Laurasian group (represented by Eocene fossils in the Northern Hemisphere) that originally dispersed through Central America into Amazonia. During cooling and drying events in the Oligocene, the frost-intolera...

The structure of tree communities in tropical forests depends on environmental filters and biotic interactions such as competition and facilitation. Many ecotone forests in Northern Amazonia are intriguingly populated by tree assemblages characterized by distinct abundances of a single species, Peltogyne gracilipes (Leguminosae). It is unclear whet...

The forests of Amazonia are among the most biodiverse plant communities on Earth. Given the immediate threats posed by climate and land-use change, an improved understanding of how this extraordinary biodiversity is spatially organized is urgently required to develop effective conservation strategies. Most Amazonian tree species are extremely rare...

A correction to this paper has been published: https://doi.org/10.1007/s10265-021-01304-5

Identifying plant species requires considerable knowledge and can be difficult without complete specimens. Fourier-transform near-infrared spectroscopy (FT-NIR) is an effective technique for discriminating plant species, especially angiosperms. However, its efficacy has never been tested on ferns. Here we tested the accuracy of FT-NIR at discrimina...

The forests of Amazonia are among the most biodiverse plant communities on Earth. Given the immediate threats posed by climate and land-use change, an improved understanding of how this extraordinary biodiversity is spatially organized is urgently required to develop effective conservation strategies. Most Amazonian tree species are extremely rare...

Identifying plant species requires considerable knowledge and can be difficult without complete specimens. Fourier-transform near-infrared spectroscopy (FT-NIR) is an effective technique for discriminating plant species, especially angiosperms. However, its efficacy has never been tested on ferns. Here we tested the accuracy of FT-NIR at discrimina...

Colli-Silva M, Medeiros H, Obermüller FA, Antar G, Amorim AM, Perdiz R, Lima HC, Gil ASB, Secco R, Lima DF, Almeida T, Delprete PG, Pederneiras L, Moraes PRL, Alves-Araújo AG, Koch I, Lohmann LG, Mello-Silva R, Viana PL, Goldenberg R, Daly D, Forzza RC. 2020. Lista de espécies de plantas vasculares da Estação Ecológica de Maracá. In: Catálogo de Pl...

IUCN Red List assessments

IUCN Red List assessments

Wood density is expressed by the ratio between dry weight and fresh volume of a sample piece. The value of this measure is an important variable for assessing wood functional properties, successional stages and biomass/carbon stock estimates in different terrestrial ecosystems. Wood density data were collected for tree species from ecotone forests...

Protium santamariae is described and illustrated. The new species is restricted to the Pacific Coast of Costa Rica but shares morphological similarities with two South American species, P. kleinii and P. krukoffii. We provide a description, a distribution map, notes on its taxonomy, and a key to distinguish it from morphologically similar species.

IUCN Red List assessments

Background: Ecotone has been defined as "a multi-dimensional environmentally stochastic interaction zone between ecological systems with characteristics defined in space and time, and by the strength of the interaction" (Hufkens et al. 2009). This is a known concept to define transitional zones between two or more ecological communities, ecosystem...

IUCN Red List assessments

We present the amended description of the species Acmanthera minima and A. parviflora based on specimens collected in the Lower Negro River basin and the Serra do Aracá National Park, respectively, in the Amazonas State, Brazil. We also provide photographs, a distribution map, notes on conservation status and a key to all species of the genus Acman...

Schoepfia clarkii is a rare species of Schoepfiaceae that to date has been known only from the single flowering specimen used in the original description from white-sand vegetation in Venezuela. Here we report new records for this species collected from the lower Negro River basin in Brazil, ca. 900 km from the type locality, but also from white-sa...

The survey was based on 129 permanent plots dispersed in six trails that cross the research grid. Measurements of stem diameter (DBH = diameter at the breast height) of each observed individual (palms and trees) were taken. All floristic data were correlated with the dominant forest types of the sampled area. Registros de Dados Os dados deste recur...

R code for plotting map of "Rediscovery of Pilosocereus oligolepsis (Cactaceae) in the State of Roraima, Brazil" (Lavor et al. 2016).

R code for plotting map of Farroñay et al. 2018

Volatile terpenoid resins represent a diverse group of plant defense chemicals involved in defense against herbivory, abiotic stress, and communication. However, their composition in tropical forests remains poorly characterized. As a part of tree identification, the ‘smell’ of damaged trunks is widely used, but is highly subjective. Here, we analy...

The Global Strategy for Plant Conservation (GSPC) was established by the Conference of Parties in 2002 to decrease the loss of plant diversity, reduce poverty and contribute to sustainable development. To achieve this overarching goal, the GSPC has established a series of targets, one of which is to ensure that plant diversity is well understood, s...

The Global Strategy for Plant Conservation (GSPC) was established by the Conference of Parties in 2002 to decrease the loss of plant diversity, reduce poverty and contribute to sustainable development. To achieve this overarching goal, the GSPC has established a series of targets, one of which is to ensure that plant diversity is well understood, s...

Macrolobium aracaense (Fabaceae), a new endemic treelet species from Brazil, is here described and illustrated. Morphologically it is similar to M. longipes: both are treelets, the leaflets have the same shape and are covered by papillary epidermis on the abaxial surface, and the sepals apex are minutely ciliate. Macrolobium aracaense occurs in sym...

Background Woody plant diversity from the Amazonian savannas has been poorly quantified. In order to improve the knowledge on wood plants of these regional ecosystems, a tree inventory was carried out in four different habitats used by indigenous people living in the savanna areas of the Northern Brazilian Amazon. The habitats were divided into two...

Background

DBS and Heights of individuals in non-forest (typical savanna) and forest habitats (riparian forest, forest island and buritizal)

Ethnomap of Darora Community, Boa Vista, Roraima.

In order to improve our knowledge on wood plants of these regional ecosystems we carried a tree inventory in four different habitats occurring in indigenous savanna areas of the Northern Brazilian Amazonia. The habitats were divided into two formations: forest (Alluvial forest, Forest island and Buritizais = buriti palm formation) and non-forest (t...

New records of angiosperms for the state of Roraima, Brazil Abstract Knowledge of the flora of the Brazilian Amazon is very incomplete and many areas are still botanically unexplored. This work reports new records of angiosperms to Roraima from two conservation units in the southwest of the state, the Serra da Mocidade National Park and Niquiá Ecol...

Estimates of carbon-stock changes in forest ecosystems require information on dead wood decomposition rates. In the Amazon, the lack of data is dramatic due to the small number of studies and the large range of forest types. The aim of this study was to estimate the decomposition rate of coarse woody debris (CWD) in two oligotrophic undisturbed for...

Estimates of carbon-stock changes in forest ecosystems require information on dead wood decomposition rates. In the Amazon, the lack of data is dramatic due to the small number of studies and the large range of forest types. The aim of this study was to estimate the decomposition rate of coarse woody debris (CWD) in two oligotrophic undisturbed for...

Pilosocereus oligolepis is a species of Cactaceae that is known only from three old type collections in Brazil (Roraima state) and Guyana. It is the only species of this genus to occur in northern Brazil. Due to the paucity of specimens and lack of precise locality data we undertook fieldwork in different vegeta- tion types of Roraima aiming to fin...

An updated inventory of Brazilian seed plants is presented and offers important insights into the country’s biodiversity. This work started in 2010, with the publication of the Plants and Fungi Catalogue, and has been updated since by more than 430 specialists working online. Brazil is home to 32,086 native Angiosperms and 23 native Gymnosperms, sh...

An updated inventory of Brazilian seed plants is presented and offers important insights into the country’s biodiversity. This work started in 2010, with the publication of the Plants and Fungi Catalogue, and has been updated since by more than 430 specialists working online. Brazil is home to 32,086 native Angiosperms and 23 native Gymnosperms, sh...

The floristic account of the Clethraceae from Bahia State, Brazil, is presented. One species, Clethra scabra, was recognized. Description of taxa, illustrations and general notes on the species are presented.

Este trabalho apresenta o tratamento taxonômico de Sapindaceae em três remanescentes de florestas montanas no sul da Bahia, Brasil. Foram registrados seis gêneros e 21 espécies. Paullinia (7 spp.) foi o gênero mais diverso em número de espécies, seguido de Cupania (5 spp.), Allophylus (4 spp.), Matayba e Serjania (2 spp. cada) e Talisia (1 espécie)...

The floristic survey of the Caryocaraceae from Bahia State, Brazil, is presented. Two genera and four species were recognized: Anthodiscus amazonicus, Caryocar brasiliense, C. coriaceum, and C. edule. An identification key, descriptions and taxonomic notes for genera and species are given, in addition to illustrations and maps of species distributi...

A new species of Paullinia from the Atlantic Forest of southern Bahia, Brazil, is described and illustrated. Paullinia unifoliolata belongs to sect. Pachytoechus and is distinguished by its unifoliolate leaves. In addition, micromorphological characters of the pollen grains are described, and a comparison with P. carpopoda, the most similar species...

Foi realizado um levantamento florístico de três remanescentes de floresta montana localizados na Mata Atlântica do sul da Bahia. Durante os anos de 2004 a 2008 foram feitas coletas periódicas de material botânico, principalmente ao longo de trilhas no interior dos fragmentos das áreas: Reserva Serra da Pedra Lascada - SPL, Reserva Serra das Lontra...

A floristic study of three areas of montane Atlantic forest in southern Bahia, Brazil, was carried out. From 2004 to 2008 regular botanical collections were made, principally along trails in the interior of the forest fragments at: the Reserva Serra da Pedra Lascada (SPL), the Reserva Serra das Lontras (SLO) and the Reserva Particular do Patrimônio...