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Approximately 2.5 × 10 square kilometers of the Amazon forest are currently degraded by fire, edge effects, timber extraction, and/or extreme drought, representing 38% of all remaining forests in the region. Carbon emissions from this degradation total up to 0.2 petagrams of carbon per year (Pg C year), which is equivalent to, if not greater than, the emissions from Amazon deforestation (0.06 to 0.21 Pg C year). Amazon forest degradation can reduce dry-season evapotranspiration by up to 34% and cause as much biodiversity loss as deforestation in human-modified landscapes, generating uneven socioeconomic burdens, mainly to forest dwellers. Projections indicate that degradation will remain a dominant source of carbon emissions independent of deforestation rates. Policies to tackle degradation should be integrated with efforts to curb deforestation and complemented with innovative measures addressing the disturbances that degrade the Amazon forest.
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http://dx.doi.org/10.1126/science.abp8622 | DOI Listing |
Acta Trop
September 2025
Instituto de Ciências Biomédicas, Universidade de São Paulo - ICB5/USP, Monte Negro, RO, Brazil; Instituto Nacional de Epidemiologia da Amazônia Ocidental - INCT-EpiAmO, Porto Velho, RO, Brazil; Centro de Pesquisas em Medicina Tropical - CEPEM, Porto Velho, RO, Brazil; Laboratório de Medicina T
This study evaluated the richness and abundance of ticks collected during two years in forest fragments of the state of Acre, western Brazilian Amazon. Considering all the environmental and host collections, the following 15 tick species were collected: Amblyomma coelebs, Amblyomma crassum, Amblyomma humerale, Amblyomma latepunctatum, Amblyomma longirostre, Amblyomma naponense, Amblyomma nodosum, Amblyomma oblongoguttatum, Amblyomma ovale, Amblyomma pacae, Amblyomma rotundatum, Amblyomma scalpturatum, Haemaphysalis juxtakochi, Ixodes luciae and Rhipicephalus microplus. Data from the most two abundant tick species, A.
View Article and Find Full Text PDFVet Res Commun
September 2025
Laboratório de Estudos Morfofisiológicos e Parasitários, Departamento de Ciências Biológicas e da Saúde, Universidade Federal do Amapá, Rodovia Josmar Chaves Pinto km 02k, s/n, Jardim Marco Zero, Macapá, CEP 68903-419, AP, Brazil.
Ticks and mites are important ectoparasites that affect animal and human health, directly causing harm and acting as vectors of pathogens. This study investigated the ectoparasites of synanthropic didelphids marsupials in northern Amazonia, Brazil, and screened them for hemotropic bacteria. The study was carried out in October 2022 in the metropolitan region of Macapá, Amapá State, Brazil, in vegetation remnants characterized by terra firme rainforest, alluvial forest, and savanna.
View Article and Find Full Text PDFRev Bras Parasitol Vet
September 2025
Universidade Federal Rural do Rio de Janeiro - UFRRJ, Instituto de Veterinária - IV, Departamento de Epidemiologia e Saúde Pública - DESP, Seropédica, Rio de Janeiro, Brasil.
This study investigated the presence of Rickettsia spp., Ehrlichia spp., Anaplasma spp.
View Article and Find Full Text PDFNat Commun
September 2025
Institute of Physics, University of São Paulo, São Paulo, Brazil.
The Amazon rainforest is one of Earth's most diverse ecosystems, playing a key role in maintaining regional and global climate stability. However, recent changes in land use, vegetation, and the climate have disrupted biosphere-atmosphere interactions, leading to significant alterations in the water, energy, and carbon cycles. These disturbances have far-reaching consequences for the entire Earth system.
View Article and Find Full Text PDFOne Health
December 2025
SimplexDNA AG, Winterthur 8404, Switzerland.
Zoonotic malaria risk at human-wildlife-environment interfaces requires surveillance that integrates signals from reservoirs, vectors and the environment. We coupled a drone-based environmental DNA (eDNA) canopy swabbing approach with portable quantitative PCR (qPCR) to detect DNA in situ during a 24-h field exercise in the Amazon rainforest. Drone-lowered sterile swabs into the canopy, which were then extracted and subjected to a multiplex pan- assay targeting five human-infecting species (limit of detection 0.
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