Instituto Nacional de Pesquisas da Amazônia

Amazonian Trichoderma spp. as Biocontrol Agents Against Agroathelia rolfsii and for Improving Tomato Yield

Sclerotium rot, caused by Agroathelia rolfsii, is one of the main soil-borne diseases that limit tomato production. This study evaluates the efficacy of Amazonian Trichoderma species in controlling Sclerotium rot and stimulating plant development under field conditions in Manaus,...

Isoforms of cysteine peptidases and osmotins instead of chitinases and peptidase inhibitors drive antifungal activity but occur as distinct isoforms in latex and callus tissues of Calotropis procera

MAIN CONCLUSION: Peptidases and osmotins are the primary determinants of antifungal activity, and their expression is tightly linked to tissue specialization in Calotropis procera plants. This study investigated whether callus cultures of two Apocynaceae species, Calotropis proce...

Bioactivity and nutritional profiling of underexplored unconventional food plants with potential for applications as functional foods

Abstract This study evaluated the bioactive and nutritional properties of six Amazonian unconventional food plants: Piper peltatum , Mansoa alliacea , Leuenbergeria bleo , Bidens bipinnata , Costus spiralis , and Urera caracasana . The phenolic compounds were identified and quant...

Xylem anatomical and hydraulic responses to light conditions guide regeneration management in tropical tree species

Light limits juvenile tree performance in tropical forests, yet we still lack anatomical criteria to predict hydraulic function across contrasting light environments. Understanding how xylem structure adjusts is essential for identifying hydraulic traits that indicate species wit...

Eucalyptus plantations act as environmental filters on bat functional traits in a Neotropical landscape

Abstract Habitat loss and agricultural expansion are among the primary drivers of biodiversity loss worldwide, with Neotropical regions being particularly vulnerable due to their high biological diversity and elevated rates of land-use conversion. Studies assessing how these chan...

On the validity of Plecturocebus parecis Gusmão et al., 2019, a titi monkey described from southwestern Brazilian Amazonia

Abstract Plecturocebus parecis was described from the southwestern Brazilian Amazon, but its taxonomic status was subsequently questioned after mitochondrial evidence prompted alternative hypotheses regarding species limits within this complex. We reassessed these hypotheses usin...

Rapid increase of climate extremes reveals new areas of concern in Amazonia

Abstract Amazonia is highly sensitive to climate extremes, yet we lack an Amazon-wide assessment that examines the spatial-temporal changes in these extreme conditions. We address this within seasons and across the hydrological year, using a quantiles approach that integrates the...

Amazon Forgotten Fishes. How the remarkable diversity of freshwater fishes is critical to people, rivers and forest

Across the vast sweep of the Amazon Basin, thousands of rivers, streams and floodplain lakes flow in an immense, interconnected waterscape— home to an unparalleled diversity of freshwater fishes. More than 2,700 species have so far been recorded, with dozens more added each year...

Urban landscape composition drives species-specific responses of aerial insectivorous bats in an Amazonian megacity

Abstract Urbanization profoundly impacts natural landscapes, altering species composition and ecosystem structure. In the Amazon, this process occurs amid large areas of native forest, which may favor biodiversity conservation in urban surroundings. Among tropical vertebrates, ba...

A cross-cultural survey of Indigenous views on interspecies communication – Towards a consilience with scientific knowledge

Communication serves as a pivotal means for mutual understanding beyond species boundaries. Definitions of interspecific communication – particularly between humans and non-human organisms – vary not only across research disciplines, but also across cultures and societies driven...

Assessing fish diversity in the Amazon: The impact of primers and reference libraries in eDNA surveys

Abstract Selecting primers for DNA amplification poses a challenge in environmental DNA (eDNA) studies, particularly in biodiverse tropical ecosystems. Researchers must balance taxonomic coverage, primer specificity, and study feasibility when choosing between a single primer pai...

Habitat insularization alters taxonomic and functional beta diversity of understorey birds in Amazonian forest islands

Abstract Habitat fragmentation can profoundly alter the composition of biological communities, modifying patterns of beta diversity among areas. These effects are manifested through different components of beta diversity: differences in richness, which reflect variation in specie...

Advances and Research Gaps in Ecological Niche Modeling of Amazonian Wetland Plants: A Systematic Review

Ecological niche modeling (ENM) is widely used to predict species distributions and support biodiversity conservation under environmental change, yet its application to Amazonian wetland plants has not been systematically synthesized. We conducted a systematic review following th...