Ima Celia Guimarães Vieira

Museu Paraense Emilio Goeldi - MPEG | MPEG · Coordenação de Botânica (CBO)

Unlike most rivers globally, nearly all lowland Amazonian rivers have unregulated flow, supporting seasonally flooded floodplain forests. Floodplain forests harbor a unique tree species assemblage adapted to flooding and specialized fauna, including fruit-eating fish that migrate seasonally into floodplains, favoring expansive floodplain areas....

RESUMO Refúgios climáticos são cruciais para a sobrevivência de diversas espécies em face das mudanças climáticas e do desmatamento. Na Amazônia, uma combinação de rápidas taxas de mudanças climáticas, extenso desmatamento e baixos níveis de tolerância climática faz que a migração para áreas com climas mais favoráveis seja uma estratégia vital. Nes...

Wildfires associated with land-use and climate change have considered a key driver to the Amazon forest collapse. However, achieving a detailed understanding of how human-related disturbances impact forest successional trajectories needs comprehensive information spanning forest strata. Here, we investigate the impact of recurrent wildfires on fore...

We describe the geographical variation in tree species composition across Amazonian forests and show how environmental conditions are associated with species turnover. Our analyses are based on 2023 forest inventory plots (1 ha) that provide abundance data for a total of 5188 tree species. Within-plot species composition reflected both local enviro...

Em novo artigo, no âmbito do Projeto REGENERA AMAZÔNIA, coordenado por Catarina Jakovac e Rita Mesquita, analisamos a governança e as dificuldades para implementar a Lei de Proteção da Vegetação Nativa-LPVN em sete estados da Amazônia e discutimos os desafios da restauração, com foco na regeneração natural. Mesmo depois de 12 anos da criação da LP...

A regeneração natural das florestas tem ganhado destaque nos últimos anos como uma estratégia para a restauração ecológica de ecossistemas florestais, para a mitigação das mudanças climáticas e para o licenciamento e a adequação ambiental à legislação brasileira. Com isso, uma diversidade de termos técnicos tem sido empregada nos contextos legais...

Here, we examine the effects of wildfires on the soil seed bank of a terra firme forest in the eastern Amazon. This seed bank is described via community-level attributes across forest stands exposed to wildfires once or twice, as well as across unburned, old-growth forest stands. A total of 2345 seeds germinated (837.5 seeds/m2). Across all three f...

Extreme weather has made 2023 virtually certain to be the warmest year on record, signaling unprecedented climate and biodiversity crises. Brazil, the world’s most biodiverse country, with two hotspots and complex social and economic layers, has experienced escalating environmental degradation over the past years. Alarming rates of native vegetatio...

Since the publication of the Millennium Ecosystem Assessment report, the concept of ecosystem services has gained visibility around the world, as many of these services are seen as essential for human well-being and their activities, and represent, in addition, an opportunity for financial support for conservation strategies of ecosystems under thr...

Amazonia’s floodplain system is the largest and most biodiverse on Earth. Although forests are crucial to the ecological integrity of floodplains, our understanding of their species composition and how this may differ from surrounding forest types is still far too limited, particularly as changing inundation regimes begin to reshape floodplain tree...

Aim: Amazonia hosts more tree species from numerous evolutionary lineages, both young and ancient, than any other biogeographic region. Previous studies have shown that tree lineages colonized multiple edaphic environments and dispersed widely across Amazonia, leading to a hypothesis, which we test, that lineages should not be strongly associated w...

The Brazilian Amazon is one of Earth’s most biodiverse and ecologically important regions. However, research investments for biodiversity in the biome are disproportionately low compared with other regions of Brazil. In 2022, the Amazon received 13% of master's, doctoral and postdoctoral scholarships and hosted 11% of all researchers working in bio...

Trees structure the Earth’s most biodiverse ecosystem, tropical forests. The vast number of tree species presents a formidable challenge to understanding these forests, including their response to environmental change, as very little is known about most tropical tree species. A focus on the common species may circumvent this challenge. Here we inve...

O Programa Nacional de Alimentação Escolar (PNAE) – maior e mais antiga política pública na área de alimentação e nutrição do Brasil, constituindo uma estratégia de Segurança Alimentar e Nutricional (SAN) – tem o intuito de promover e garantir o acesso à alimentação adequada aos estudantes da educação básica. A Lei Federal nº 11.947/2009, vincula o...

A Amazônia é uma região estratégica para o país e o mundo, e o centro da agenda ambiental brasileira. O presente artigo contextualiza a importância dessa agenda e apresenta ações-chave para a região. Isso inclui o reforço na fiscalização e no monitoramento para alcançar o desmatamento e a degradação florestal zero, o combate à economia da grilagem,...

ARTICLE Mapping density, diversity and species-richness of the Amazon tree flora Using 2.046 botanically-inventoried tree plots across the largest tropical forest on Earth, we mapped tree species-diversity and tree species-richness at 0.1-degree resolution, and investigated drivers for diversity and richness. Using only location, stratified by fore...

Indigenous societies are known to have occupied the Amazon basin for more than 12,000 years, but the scale of their influence on Amazonian forests remains uncertain. We report the discovery, using LIDAR (light detection and ranging) information from across the basin, of 24 previously undetected pre-Columbian earthworks beneath the forest canopy. Mo...

The exploitation of nontimber forest products has been proposed as a sustainable way to exploit tropical forests, but such an opportunity remains to be examined case-by-case. We examine the impact of the intensification of the açaí palm (Euterpe olera-cea) management for fruit production via increments in palm clumps/stems density on the woody plan...

Este artigo analisa o panorama da sustentabilidade urbana da Região de Integração (RI) Baixo Amazonas para os anos 2000 e 2010 e relataos respectivos avanços e desafios em direção à sustentabilidade. RI é definida como uma unidade de análise composta por 13 municípios situados na metade setentrional do estado do Pará, Brasil. A região foi escolhida...

O Grupo de Estudos e Atividades Socioambientais (GEASA), vinculado à Universidade Federal do Oeste do Pará (UFOPA) e ao Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), trás aqui a segunda edição do e-book “INTERFACES SOCIOAMBIENTAIS NO ANTROPOCENO”, um livro que surge com a proposta de sistematização do conhecimento e pesquisa...

Abstract The structure of urban secondary forests and their potential for meliponiculture in the eastern Amazon was studied in the municipality of Belterra, Pará. The sampling was carried out in 25 plots of 40 m2 in two areas (0.1 ha) of secondary forests (SF), in which three classes of DBH values were considered (C1:1 cm ≤ DBH ≤ 5 cm; C2: 5 cm < D...

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...

Biodiversity loss is one of the main challenges of our time, and attempts to address it require a clear understanding of how ecological communities respond to environmental change across time and space. While the increasing availability of global databases on ecological communities has advanced our knowledge of biodiversity sensitivity to environme...

Wildfires have emerged as an escalating source of tropical forest degradation with a cascade of negative consequences for the sustainable development of tropical regions. This is particularly the case in the Amazon forest region as wildfires have already degraded a considerable extension of both secondary and old-growth forests, including "social f...

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...

Changes in species distribution in response to climate change might challenge the territorial boundaries of protected areas. Amazonia is one of the global regions most at risk of developing long distances between current and future analogous climates and the emergence of climate conditions without analogs in the past. As a result, species present w...

• As pesquisas ecológicas e a compilação e curadoria de dados científicos são atividades fundamentais para a compreensão das mudanças na biodiversidade da Amazônia; • As pesquisas ecológicas ainda estão concentradas em locais mais acessíveis e próximos às instituições de pesquisa; • A Amazônia é a região do país que menos recebe investimento para p...

In a time of rapid global change, the question of what determines patterns in species abundance distribution remains a priority for understanding the complex dynamics of ecosystems. The constrained maximization of information entropy provides a framework for the understanding of such complex systems dynamics by a quantitative analysis of important...

The exploitation of non-timber forest products has been proposed as a sustainable way to exploit tropical forests, but such an opportunity remains to examined case-by-case. We examine the impact by the intensification of the açaí palm ( Euterpe oleracea ) management for fruit production via increments on palm clumps/stems density on the woody plant...

Esta obra constituiu-se a partir de um processo colaborativo entre professores, estudantes e pesquisadores que se destacaram e qualificaram as discussões neste espaço formativo. Resulta, também, de movimentos interinstitucionais e de ações de incentivo à pesquisa que congregam pesquisadores das mais diversas áreas do conhecimento e de diferentes In...

O Grupo de Estudos e Atividades Socioambientais (GEASA), vinculado à Universidade Federal do Oeste do Pará (UFOPA) e ao Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), trás aqui a segunda edição do e-book “INTERFACES SOCIOAMBIENTAIS NO ANTROPOCENO”, um livro que surge com a proposta de sistematização do conhecimento e pesquisa...

O artigo analisa a expansão da cultura de eucalipto (Eucalyptus spp.) no leste da Amazônia, especificamente nos municípios de Paragominas, Dom Eliseu, Rondon do Pará e Ulianópolis no estado do Pará, aplicando o Índice de Monocultura (IM) como indicador de gestão territorial. O IM foi adaptado para esses municípios e os limites foram estabelecidos c...

Ecosystem restoration is an important means to address global sustainability challenges. However, scientific and policy discourse often overlooks the social processes that influence the equity and effectiveness of restoration interventions. In the present article, we outline how social processes that are critical to restoration equity and effective...

Naturally regenerating forests or secondary forests (SFs) are a promising strategy for restoring large expanses of tropical forests at low cost and with high environmental benefits. This expectation is supported by the high resilience of tropical forests after natural disturbances, yet this resilience can be severely reduced by human impacts. Asses...

Aim To investigate the geographic patterns and ecological correlates in the geographic distribution of the most common tree dispersal modes in Amazonia (endozoochory, synzoochory, anemochory and hydrochory). We examined if the proportional abundance of these dispersal modes could be explained by the availability of dispersal agents (disperser‐avail...

Esta pesquisa discute as principais transformações sociais e ecológicas ocorridas a partir da criação, em 2004, do Projeto de Assentamento Agroextrativista (PAE) São João Batista, Ilha de Campompema, Abaetetuba, Pará e analisa a sua condição de sustentabilidade. A pesquisa de campo foi realizada no período de março a agosto de 2018, por meio de 141...

Human activities pose a major threat to tropical forest biodiversity and ecosystem services. Although the impacts of deforestation are well studied, multiple land-use and land-cover transitions (LULCTs) occur in tropical landscapes, and we do not know how LULCTs differ in their rates or impacts on key ecosystem components. Here, we quantified the i...

Forests that regrow naturally on abandoned fields are important for restoring biodiversity and ecosystem services, but can they also preserve the distinct regional tree floras? Using the floristic composition of 1215 early successional forests (≤20 years) in 75 human-modified landscapes across the Neotropic realm, we identified 14 distinct floristi...

Clement, C.R., I. Vieira, P.M. Fearnside & L. Ferrante. 2022. Desenvolvimento amazônico sequestrado pelo crime organizado. OECO, 02 de maio de 2022. https://oeco.org.br/analises/desenvolvimento-amazonico-sequestrado-pelo-crime-organizado/

Advances in monitoring capacity and strengthened law enforcement have helped to reduce deforestation in the Brazilian Amazon the early 2000’s. Embargoes imposed on the use of deforested land are important instruments for deterring deforestation and enabling forest recovery. However, the extent to which landowners respect embargoes in the Brazilian...

The protection of the Brazilian Amazon is essential to prevent the collapse of global biodiversity and minimize the negative impacts of climate change worldwide. However, there is currently no estimate of how much it costs to conserve most of this region. We report that maintaining ∼80% (3.5 million km²) of the region within conservation areas (con...

Aim Water availability is the major driver of tropical forest structure and dynamics. Most research has focused on the impacts of climatic water availability, whereas remarkably little is known about the influence of water table depth and excess soil water on forest processes. Nevertheless, given that plants take up water from the soil, the impacts...

Resilient secondary tropical forests? Although deforestation is rampant across the tropics, forest has a strong capacity to regrow on abandoned lands. These “secondary” forests may increasingly play important roles in biodiversity conservation, climate change mitigation, and landscape restoration. Poorter et al . analyzed the patterns of recovery i...

O objectivo desta pesquisa é analisar os estágios e os avanços para o alcançe das metas de Desenvolvimento Sustentável em Moçambique, no período de 2001 a 2014, através da aplicação do Barômetro de Sustentabilidade (BS), método de análise bidimensional, que inclui dois subsistemas, o humano e o ambiental, apartir dos quais são calculados os índices...

Ongoing deforestation in the Brazilian Amazon is the outcome of an explicit federal project to occupy, integrate, and “modernize” the region. Although there have been isolated periods of deforestation control, most recently between 2004 and 2012, the overall trajectory of the region since the colonial period has been one of forest loss and degradat...

The São João Batista riverside community experienced a golden phase in the production of cachaça from sugar cane (Saccharum officinarum L.). It underwent a period of decay around 1975 and, in 2004, became an Agro-extractive Settlement Project (PAE), with an economic system based on the exploitation and commercialization of açaí (Euterpe oleracea Ma...

The goal of this study was to determine the anthropization evolution of the Guamá river basin in the years 2000, 2008 and 2018 by means of the Anthropic Transformation Index. Land use and cover maps were obtained from two databases, Project Mapbiomas (Brazilian Annual Land Use and Land Cover Mapping Project) and PRODES (Project for the Satellite Mo...

O Brasil tem vivenciado incêndios sem precedentes na última década. Imagens de imensas áreas queimadas ou animais mortos que não conseguiram escapar dos incêndios em 2020 chocaram o mundo. Para prevenir ou minimizar desastres similares no futuro nós devemos compreender os fatores que levaram a esses eventos catastróficos. As causas e consequências...

Brazil has experienced unprecedented wildfires in the last decade. Images of immense burnt areas or deadanimals that failed to escape the 2020 wildfires have shocked the world. To prevent or minimize furthersimilar disasters we must understand the factors that have led to these catastrophic events. The causes andconsequences of wildfires entail com...

The exploitation of non-timber forest products (NTFPs) has been encouraged in order to reconcile economic uses, biodiversity conservation and the provision of ecosystem services. In this paper we investigate how increments on the açaí palm density (Euterpe oleracea) via forest management change tree assemblages across 47 plots in the Amazon estuari...

Este trabalho tem como objetivo analisar a execução do Programa Nacional de Alimentação Escolar (PNAE) durante a pandemia nas Instituições Federais de Ensino (IFEs) localizadas na Região Metropolitana de Belém (RMB). Trata-se de um estudo de abordagem qualitativa de natureza teórico-empírica que combina elementos da pesquisa exploratória e descriti...

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...

Tropical forests are the most diverse and productive ecosystems on Earth. While better understanding of these forests is critical for our collective future, until quite recently efforts to measure and monitor them have been largely disconnected. Networking is essential to discover the answers to questions that transcend borders and the horizons of...

Na agricultura de corte e queima, a capoeira tem como papel principal a fertilização da terra após a queima de sua biomassa vegetal. Geralmente as repetidas queimadas acabam destruindo todas as formas de regeneração, incluindo o banco de sementes. Pensando nessa problemática, o Projeto Studies of Human Impact on Forests and Floodplains in the Tropi...

In a time of rapid global change, the question of what determines patterns in species abundance distribution remains a priority for understanding the complex dynamics of ecosystems. The constrained maximization of information entropy provides a framework for the understanding of such complex systems dynamics by a quantitative analysis of important...

No intuito de se caracterizar a flora da região de Belo Monte ou Volta Grande do Xingu, efetuou-se uma análise da florística, fitossociologia, estrutura e etnobotânica nas fitofisionomias florestais na área de estudo que inclui os territórios de Altamira, Anapu, Senador José Porfírio e Vitória do Xingu, nas mesorregiões do baixo e médio Xingu, no e...

Este trabalho enfatiza a integração da técnica de sensoriamento remoto às informações de cobertura vegetal e uso da terra no município de São Francisco do Pará (Região Bragantina, Pará, Brasil), cuja área possui uma história de uso da terra com mais de um século. Foram utilizadas imagens Landsat TM5 (1995) e TM7 (1999), as quais foram submetidas a...

A legislação brasileira não define quais das características das formações secundárias devem ser avaliadas para a classificação do seu estágio sucessional, se inicial, intermediário ou avançado, dificultando os procedimentos de licenciamento para supressão, manejo e conservação da vegetação nativa. Neste estudo, propõe-se um sistema de classificaçã...

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...

Apesar da dificuldade em elaborar e implementar uma agenda climática oficial, o Pará vem implementando desde 2009 um conjunto amplo de iniciativas relevantes com o potencial de impactar positivamente as principais fontes de emissão do estado, que são as mudanças de uso da terra, principalmente o desmatamento, e a agropecuária. Ao longo da década qu...

Banks-Leite et al. (2021) claim that our suggestion of preserving ≥40% forest cover lacks evidence and can be problematic. We find these claims unfounded, and discuss why conservation planning urgently requires valuable, well-supported, and feasible general guidelines like the 40% criterion. Using region-specific thresholds worldwide is unfeasible...

A Correction to this paper has been published: https://doi.org/10.1038/s41467-020-20537-x

Banks-Leite et al. (2021) claim that our suggestion of preserving ≥40% forest cover lacks evidence and can be problematic. We find these claims unfounded, and discuss why conservation planning urgently requires valuable, well-supported, and feasible general guidelines like the 40% criterion. Using region-specific thresholds worldwide is unfeasible...