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Registros recuperados: 7
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Annotated checklist of the herpetofauna of Petit Saut, Sinnamary River, French Guiana Naturalis
Hoogmoed, M.S.; Avila-Pires, T.C.S..
The Mission Radeau des Cimes to Petit Saut, French Guiana, offered the opportunity to study the herpetofauna of the canopy of the tropical rainforest, an area hardly studied sofar. Two localities at heights of 30 and 35 m could be studied, whereas data on a third site were obtained through information from other participants. The herpetological results of the research in the canopy were meagre. Only the frog Hyla leucophyllata (Beireis) and the lizard Mabuya bistriata (Spix) were observed in the canopy. Additionally the terrestrial herpetofauna was studied extensively and turned out to contain some species that had not been reported before from French Guiana. Also, for many species new distribution data within French Guiana were obtained. Le Mission Radeau...
Tipo: Article / Letter to the editor Palavras-chave: Reptilia; Amphibia; Tropical rainforest; Canopy; Forest floor; Neotropics; French Guiana; 42.82.
Ano: 1991 URL: http://www.repository.naturalis.nl/record/318446
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Confronting model predictions of carbon fluxes with measurements of Amazon forests subjected to experimental drought. Repositório Alice
POWELL, T. I.; GALBRAITH, D. R.; CHRISTOFFERSEN, B. O.; HARPER, A.; IMBUZEIRO, H. M. A.; ROWLAND, L.; ALMEIDA, S.; BRANDO, P. M.; COSTA, A. C. L. da; COSTA, M. H.; LEVINE, N. M.; MALHI, Y.; SALESKA, S. R.; SOTTA, E.; WILLIAMS, M.; MEIR, P.; MOORCROFT, P. R..
Considerable uncertainty surrounds the fate of Amazon rainforests in response to climate change. Here, carbon (C) flux predictions of five terrestrial biosphere models (Community Land Model version 3.5 (CLM3.5), Ecosystem Demography model version 2.1 (ED2), Integrated BIosphere Simulator version 2.6.4 (IBIS), Joint UK Land Environment Simulator version 2.1 (JULES) and Simple Biosphere model version 3 (SiB3)) and a hydrodynamic terrestrial ecosystem model (the Soil?Plant?Atmosphere (SPA) model) were evaluated against measurements from two large-scale Amazon drought experiments. Model predictions agreed with the observed C fluxes in the control plots of both experiments, but poorly replicated the responses to the drought treatments. Most notably, with the...
Tipo: Artigo de periódico Palavras-chave: Tropical rainforest; Ciclo do cabono; Modelo de biosfera terrestre; Terrestrial biosphere model.; Floresta tropical; Carbon cycle..
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/965567
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Density, size and distribution of stomata in 35 rainforest tree species in Central Amazonia Acta Amazonica
Camargo,Miguel Angelo Branco; Marenco,Ricardo Antonio.
Stomata are turgor-operated valves that control water loss and CO2 uptake during photosynthesis, and thereby water relation and plant biomass accumulation is closely related to stomatal functioning. The aims of this work were to document how stomata are distributed on the leaf surface and to determine if there is any significant variation in stomatal characteristics among Amazonian tree species, and finally to study the relationship between stomatal density (S D) and tree height. Thirty five trees (>17 m tall) of different species were selected. Stomatal type, density (S D), size (S S) and stomatal distribution on the leaf surface were determined using nail polish imprints taken from both leaf surfaces. Irrespective of tree species, stomata were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazonia; Hypostomatous leaves; Stomatal density; Stomatal length; Tropical rainforest.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672011000200004
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Effects of reduced-impact logging on medium and large-bodied forest vertebrates in eastern Amazonia Biota Neotropica
Laufer,Juliana; Michalski,Fernanda; Peres,Carlos A..
Standard line-transect census techniques were deployed to generate a checklist and quantify the abundance of medium and large-bodied vertebrate species in forest areas of eastern Amazonia with and without a history of reduced-impact logging (RIL). Three areas were allocated a total of 1,196.9 km of line-transect census effort. Sampling was conducted from April to June 2012 and from April to August 2013, and detected 29 forest vertebrate species considered in this study belonging to 15 orders, 20 families and 28 genera. Additionally, eight species were recorded outside census walks through direct and indirect observations. Of this total, six species are considered vulnerable according to IUCN (Ateles paniscus, Myrmecophaga tridactyla, Priodontes maximus,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fauna; Forest management; Tropical rainforest; Mammals; Birds.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032015000200202
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Interannual and Seasonal Variations in Ecosystem Transpiration and Water Use Efficiency in a Tropical Rainforest ArchiMer
Aguilos, Maricar; Stahl, Clement; Burban, Benoit; Herault, Bruno; Courtois, Elodie; Coste, Sabrina; Wagner, Fabien; Ziegler, Camille; Takagi, Kentaro; Bonal, Damien.
Warmer and drier climates over Amazonia have been predicted for the next century with expected changes in regional water and carbon cycles. We examined the impact of interannual and seasonal variations in climate conditions on ecosystem-level evapotranspiration (ET) and water use efficiency (WUE) to determine key climatic drivers and anticipate the response of these ecosystems to climate change. We used daily climate and eddyflux data recorded at the Guyaflux site in French Guiana from 2004 to 2014. ET and WUE exhibited weak interannual variability. The main climatic driver of ET and WUE was global radiation (Rg), but relative extractable water (REW) and soil temperature (Ts) did also contribute. At the seasonal scale, ET and WUE showed a modal pattern...
Tipo: Text Palavras-chave: Tropical rainforest; Evapotranspiration; Water use efficiency; Drought; Radiation.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00484/59572/62542.pdf
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Niche differentiation mechanisms among canopy frugivores and zoochoric trees in the northeastern extreme of the Amazon Acta Amazonica
TODESCHINI,Felipe; TOLEDO,José Julio de; ROSALINO,Luis Miguel; HILÁRIO,Renato Richard.
ABSTRACT Frugivores and zoocoric trees represent an important proportion of tropical rainforest biodiversity. As niche differences favor species coexistence, we aimed to evaluate morphological and temporal niche segregation mechanisms among zoochoric trees and canopy frugivores in a tropical rainforest in the northeastern extreme of the Brazilian Amazon. We tested the effects of fruit morphology, tree size, frugivore body size and time of day on fruit consumption. We recorded the frugivore species that fed on 72 trees (44 species, 22 genera) and whether these frugivores swallowed the seeds. We monitored trees only once from 07:00 to 17:00 h between January and September 2017. We observed fruit consumption in 20 of the 72 trees. Seventy-three frugivore...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amapá National Forest; Frugivory; Phenology; Seed dispersal; Tropical rainforest.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000300263
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Trade-offs among forest value components in community forests of southwestern Amazonia Ecology and Society
Alverga, Paula; Universidade Federal do Acre, Brazil;; Barnes, Grenville; School of Forest Resources and Conservation, University of Florida, USA; gbarnes@ufl.edu; Brasil da Silva, Izaias; Universidade Federal do Acre, Brazil;; Castro, Wendeson; Universidade Federal do Acre, Brazil;; de Souza Moll, Iracema; Universidade Federal do Acre, Brazil;; Medeiros, Herison; Universidade Federal do Acre, Brazil; medeiros.herison@gmail.com; Murphy, Skya; Department of Biology, University of Florida, USA;; Rockwell, Cara A.; School of Forest Resources and Conservation, University of Florida, USA; rockwell_cara@yahoo.com; Shenkin, Alexander; School of Forest Resources and Conservation, University of Florida, USA; Department of Biology, University of Florida, USA; ashenkin@ufl.edu; Silveira, Marcos; Universidade Federal do Acre, Brazil;; Southworth, Jane; Department of Geography and Land Use and Environmental Change Institute, University of Florida, USA; jsouthwo@geog.ufl.edu; Perz, Stephen; Department of Sociology and Criminology & Law, University of Florida, USA; sperz@soc.ufl.edu.
Contemporary conservation interventions must balance potential trade-offs between multiple ecosystem services. In tropical forests, much attention has focused on the extent to which carbon-based conservation provided by REDD+ policies can also mitigate biodiversity conservation. In the nearly one-third of tropical forests that are community owned or managed, conservation strategies must also balance the multiple uses of forest products that support local livelihoods. Although much discussion has focused on policy options, little empirical evidence exists to evaluate the potential for trade-offs among different tropical forest value components. We assessed multiple components of forest value, including tree diversity, carbon stocks, and both timber and...
Tipo: Peer-Reviewed Reports Palavras-chave: Aç Ai; Biodiversity conservation; Brazil nut; Carbon stocks; Livelihood; NTFP; REDD; Rubber; Timber; Tropical rainforest.
Ano: 2014
Registros recuperados: 7
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