A5031348563- Geology and Paleoclimatology Research
- Amazonian Archaeology and Ethnohistory
- Geography and Environmental Studies
- Plant Diversity and Evolution
- Fish biology, ecology, and behavior
- Isotope Analysis in Ecology
- Geological formations and processes
- Pleistocene-Era Hominins and Archaeology
- Paleontology and Stratigraphy of Fossils
- Coastal wetland ecosystem dynamics
- Evolution and Paleontology Studies
- Ecology and Vegetation Dynamics Studies
- Coastal and Marine Dynamics
- Science and Science Education
- Cassava research and cyanide
- Plant and animal studies
- Business and Management Studies
- Species Distribution and Climate Change
- Statistical Distribution Estimation and Applications
- Marine Biology and Ecology Research
- Marine and coastal plant biology
- Aquatic Ecosystems and Phytoplankton Dynamics
- Geochemistry and Geologic Mapping
- Academic Research in Diverse Fields
- Environmental and biological studies
Universidade de São Paulo
2015-2025
Universidade Federal do Maranhão
2025
Field Museum of Natural History
2001-2024
Instituto de Geociencias
2016-2024
Universidade Federal do Ceará
2023
Hospital Universitário da Universidade de São Paulo
2023
Guarulhos University
2004-2020
Brazilian Biosciences National Laboratory
2019
Pontifícia Universidade Católica do Paraná
2004-2015
Universidade São Francisco
2012-2014
A continuous pollen history of more than 40,000 years was obtained from a lake in the lowland Amazon rain forest. Pollen spectra demonstrate that tropical forest occupied region continuously and savannas or grasslands were not present during last glacial maximum. The data suggest western fragmented into refugia times lowlands source dust. Glacial age forests comparable to modern but also included species now restricted higher elevations by temperature, suggesting cooling order 5° 6°C.
Abstract The origin of modern disjunct plant distributions in the Brazilian Highlands with strong floristic affinities to distant montane rainforests isolated mountaintops northeast and northern Amazonia Guyana Shield remains unknown. We tested hypothesis that these unexplained biogeographical patterns reflect former ecosystem rearrangements sustained by widespread migrations possibly due climatic are very dissimilar from present-day conditions. To address this issue, we mapped presence...
The first paleoecological analysis of a complete sedimentary record spanning the period from late Pleistocene to present lowland Panama, documents changes in vegetation communities through major climatic change and onset human disturbance. Past sympatry is found among presently allopatric species, suggesting that tropical forest are not species—stable time. Late floras at Lake La Yeguada (elevation 650 m), had high relative abundance montane elements, e.g., Quercus Magnolia, existing some...
The refugial hypothesis is treated as the definitive history of Amazonian forests in many texts. Surprisingly, this important theoretical framework has not been based on paleoecological data. Consequently, a model aridity during northern hemispheric glaciation accepted uncritically. Ironically, Refuge Hypothesis tested by paleobotanical We present revision concept Neotropical Pleistocene Forest Refuges and test it light paleocological studies derived from pollen analysis lake sediments...
While large-scale pre-Columbian human occupation and ecological disturbance have been demonstrated close to major Amazonian waterways, less is known of sites in terra firme settings. Palaeoecological analyses two lake districts central western Amazonia reveal long histories land use. At both locations, activity was centred on one the lakes, while others were either lightly used or unused. These indicate that scale impacts these settings localized probably strongly influenced by presence a...
Southwestern Amazonia is considered an early centre of plant domestication in the New World, but most evidence for this hypothesis comes from genetic data since systematic archaeological fieldwork area recent. This paper provides first-hand archaeobotanical food production and middle Holocene (ca. 9,000-5000 cal. BP) deposits at Teotonio, open-air site located on a 40 m-high bluff south bank Madeira river. Such includes presence local exotic domesticates such as manioc (Manihot esculenta),...
Abstract The lack of paleoecological records from the montane Atlantic Rainforest coastal Brazil, a hotspot biological diversity, has been major obstacle to our understanding vegetational changes since last glacial cycle. We present carbon isotope and pollen assess impact glaciation on native vegetation Serra do Mar rainforest in São Paulo, Brazil. From ca. 28,000 ∼ 22,000 14 C yr BP, subtropical forest with conifer trees is indicative cool humid conditions. In agreement isotopic data soil...
Abstract. The Xingu River is a large clearwater river in eastern Amazonia and its downstream sector, known as the Volta Grande do ("Xingu Great Bend"), unique fluvial landscape that plays an important role biodiversity, biogeochemistry prehistoric historic peopling of Amazonia. sedimentary dynamics sector will be shifted next few years due to construction dams associated with Belo Monte hydropower project. Impacts on biodiversity carbon cycling are anticipated, especially likely changes...
Two long palaeoecological records (pollen, diatoms, 14 C, chemistry and charcoal) provide a detailed record of Holocene environmental conditions in the lowlands lower Amazon. Changes composition terra firme forest are evident but cover is maintained throughout. Fluctuations lake level changes seasonality tracked both sedimentary sequences. Rising early-Holocene sea levels consequent rise local water tables probably caused flooding one sites. A stepped increase precipitation suggested with...
This study reconstructs and interprets the changing range of Atlas cedar in northern Morocco over last 9,000 years. A synthesis fossil pollen records indicated that cedars occupied a wider at lower elevations during mid-Holocene than today. The geographical expansion reflected low winter temperatures higher water availability whole Rif Mountains relative to modern conditions. trend increasing aridity observed after 6000 years BP progressively reduced prompted its migration towards above 1400...
ABSTRACT The late Quaternary evolution of central‐eastern Brazil has been under‐researched. Questions remain as to the origin Cerrado, a highly endangered biome, and other types vegetation, such Capões – small vegetation islands semi‐deciduous mountain forests. We investigated factors that influenced expansion contraction Cerrado during (last ~35 ka), using multi‐proxy approach: stable isotopes (δ 13 C, δ 15 N), geochemistry, pollen multivariate statistics derived from peat core (Pinheiro...