... Astronomers; Included Are: Stepan Rumovskii, Johann Tobias Burg, Pierre François André Méchain, Poul Löwenörn, Johann Karl Burckhardt, Duc la Chapelle, ...
1857 - Gale Group | NCCO SciTechMed 2 of 2
... https://doi.org/10.1111/oik.01753Maxime Réjou-Méchain, Pierre-Olivier Cheptou, Jason Fridley High incidence of dioecy ...
Tópico(s): Fern and Epiphyte Biology
1982 - University of Chicago Press | The American Naturalist
Jean-Baptiste Biot, François Arago, Pierre Méchain, Bern Dibner,
Provenance: Donated by Bern Dibner.; The Burndy Library Collection at the Huntington Library. Book.
1821 - Gale Group | NCCO SciTechMed 2 of 2
Maxime Réjou‐Méchain, Pierre‐Olivier Cheptou,
Summary The role of plant sexual systems in community assembly has been little studied. Classical assumptions predict an association between self‐fertilization and colonizing ability, a pattern not systematically supported by observations. Here, using a data set of 626 462 trees sampled throughout 8300 km 2 in central Africa and historical information collected 60 years ago on forest successional status, we compare sexual system assemblages between young successional and mature communities. We use ...
Tópico(s): Insect and Arachnid Ecology and Behavior
2015 - Wiley | Journal of Ecology
Suraj Reddy Rodda, Rakesh Fararoda, Rajashekar Gopalakrishnan, Nidhi Jha, Maxime Réjou‐Méchain, Pierre Couteron, Nicolas Barbier, Alfonso Alonso, Ousmane Bako, Patrick Bassama, Debabrata Behera, Pulchérie Bissiengou, Hervé Biyiha, Warren Y. Brockelman, Wirong Chanthorn, Prakash Chauhan, V. K. Dadhwal, Gilles Dauby, Vincent Deblauwe, Narcis Dongmo, Vincent Droissart, S. Jeyakumar, Chandra Shekar Jha, Narcisse G. Kandem, John Katembo Mukirania, Ronald Kougue, H. Leblanc, Simon L. Lewis, Moses Libalah, M Manikandan, Olivier Martin‐Ducup, Germain Mbock, Hervé Memiaghe, Gislain II Mofack, Praveen Mutyala, Narayanan Ayyappan, Anuttara Nathalang, Gilbert Oum Ndjock, F. Ngoula, Rama Rao Nidamanuri, Raphaël Pélissier, Sassan Saatchi, Le Bienfaiteur Sagang, Patrick Salla, Murielle Simo‐Droissart, Thomas B. Smith, Bonaventure Sonké, Tariq Stévart, Danièle Tjomb, Donatien Zébazé, Lise Zemagho, Pierre Ploton,
Abstract Accurate mapping and monitoring of tropical forests aboveground biomass (AGB) is crucial to design effective carbon emission reduction strategies and improving our understanding of Earth’s carbon cycle. However, existing large-scale maps of tropical forest AGB generated through combinations of Earth Observation (EO) and forest inventory data show markedly divergent estimates, even after accounting for reported uncertainties. To address this, a network of high-quality reference data is needed ...
Tópico(s): Forest Ecology and Biodiversity Studies
2024 - Nature Portfolio | Scientific Data
Maxime Réjou‐Méchain, Nicolas Barbier, Pierre Couteron, Pierre Ploton, Grégoire Vincent, Martin Herold, Stéphane Mermoz, Sassan Saatchi, Jérôme Chave, Florian de Boissieu, Jean‐Baptiste Féret, Stéphane Momo Takoudjou, Raphaël Pélissier,
Tópico(s): Remote Sensing in Agriculture
2019 - Springer Science+Business Media | Surveys in Geophysics
Maxime Réjou‐Méchain, Raphaël Pélissier, Sylvie Gourlet‐Fleury, Pierre Couteron, Robert Nasi, John D. Thompson,
Abstract: Understanding how species assemblages are structured in relation to environmental variation is a central issue in community ecology. However, factors that create regional variation in relative species abundances have been little studied due to the rarity of large-scale datasets. Here, we investigated a large dataset (30 180 0.5-ha plots spread over 1 600 000 ha) gathered from forest planning inventories in the semi-deciduous forest of the south western Central African Republic. We used ...
Tópico(s): Plant and animal studies
2008 - Cambridge University Press | Journal of Tropical Ecology
Tópico(s): Historical Linguistics and Language Studies
1987 - Armand Colin | Annales historiques de la Révolution française
... 1792–1799); où comment Jean‐Baptiste Delambre et Pierre Méchain, traversant la France révolutionnaire à la rencontre l’ ...
Tópico(s): History of Science and Natural History
2007 - University of Chicago Press | Isis
Sourabh Pargal, Rakesh Fararoda, G. Rajashekar, Natesan Balachandran, Maxime Réjou‐Méchain, Nicolas Barbier, Chandra Jha, Raphaël Pélissier, V. K. Dadhwal, Pierre Couteron,
Large scale assessment of aboveground biomass (AGB) in tropical forests is often limited by the saturation of remote sensing signals at high AGB values. Fourier Transform Textural Ordination (FOTO) performs well in quantifying canopy texture from very high-resolution (VHR) imagery, from which stand structure parameters can be retrieved with no saturation effect for AGB values up to 650 Mg·ha−1. The method is robust when tested on wet evergreen forests but is more demanding when applied across different ...
Tópico(s): Remote Sensing and LiDAR Applications
2017 - Multidisciplinary Digital Publishing Institute | Remote Sensing
Pierre Ploton, Frédéric Mortier, Maxime Réjou‐Méchain, Nicolas Barbier, Nicolas Picard, Vivien Rossi, Carsten F. Dormann, Guillaume Cornu, Gaëlle Viennois, Nicolas Bayol, Alexei Lyapustin, Sylvie Gourlet‐Fleury, Raphaël Pélissier,
Mapping aboveground forest biomass is central for assessing the global carbon balance. However, current large-scale maps show strong disparities, despite good validation statistics of their underlying models. Here, we attribute this contradiction to a flaw in the validation methods, which ignore spatial autocorrelation (SAC) in data, leading to overoptimistic assessment of model predictive power. To illustrate this issue, we reproduce the approach of large-scale mapping studies using a massive forest ...
Tópico(s): Remote Sensing in Agriculture
2020 - Nature Portfolio | Nature Communications
Pierre Ploton, Nicolas Barbier, Stéphane Momo Takoudjou, Maxime Réjou‐Méchain, Faustin Boyemba Bosela, Georges Chuyong, Gilles Dauby, Vincent Droissart, Adeline Fayolle, Rosa C. Goodman, Matieu Henry, Narcisse Guy Kamdem, John Katembo Mukirania, David Kenfack, Moses Libalah, Alfred Ngomanda, Vivien Rossi, Bonaventure Sonké, Nicolas Texier, Duncan Thomas, Donatien Zébazé, Pierre Couteron, Uta Berger, Raphaël Pélissier,
Abstract. Accurately monitoring tropical forest carbon stocks is a challenge that remains outstanding. Allometric models that consider tree diameter, height and wood density as predictors are currently used in most tropical forest carbon studies. In particular, a pantropical biomass model has been widely used for approximately a decade, and its most recent version will certainly constitute a reference model in the coming years. However, this reference model shows a systematic bias towards the largest ...
Tópico(s): Ecology and Vegetation Dynamics Studies
2016 - Copernicus Publications | Biogeosciences
Nidhi Jha, Nitin Kumar Tripathi, Wirong Chanthorn, Warren Y. Brockelman, Anuttara Nathalang, Raphaël Pélissier, Siriruk Pimmasarn, Pierre Ploton, Nophea Sasaki, S. Virdis, Maxime Réjou‐Méchain,
Abstract. Half of Asian tropical forests were disturbed in the last century resulting in the dominance of secondary forests in Southeast Asia. However, the rate at which biomass accumulates during the recovery process in these forests is poorly understood. We studied a forest landscape located in Khao Yai National Park (Thailand) that experienced strong disturbances in the last century due to clearance by swidden farmers. Combining recent field and airborne laser scanning (ALS) data, we first built ...
Tópico(s): Forest Management and Policy
2020 - Copernicus Publications | Biogeosciences
Roland Ackermann, K. Stelmaszczyk, Philipp Rohwetter, G. Méjean, Estelle Salmon, Jia Yu, Jérôme Kasparian, G. Méchain, V. Bergmann, S. Schäper, Bruno Weise, T. Kumm, K. Rethmeier, W. Kalkner, L. Wöste, Jean‐Pierre Wolf,
We demonstrate laser control of high-voltage discharges over a gap of 1.2 m filled with a dense water cloud. Self-guided filaments generated by ultrashort laser pulses are transmitted through the cloud and ionize a continuous plasma channel. The cloud typically reduces the discharge probability in given experimental conditions by 30%, but has almost no influence on the threshold required to trigger single discharge events, both in electrical field and laser energy. This result is favorable for real- ...
Tópico(s): Lightning and Electromagnetic Phenomena
2004 - American Institute of Physics | Applied Physics Letters
Jean‐François Bastin, Nicolas Barbier, Maxime Réjou‐Méchain, Adeline Fayolle, Sylvie Gourlet‐Fleury, Danae Maniatis, Thalès de Haulleville, Fidèle Baya, Hans Beeckman, Denis Beina, Pierre Couteron, George B. Chuyong, Gilles Dauby, Jean‐Louis Doucet, Vincent Droissart, Marc Dufrêne, Corneille Ewango, J.F. Gillet, Christelle Gonmadje, Térese B. Hart, T. Kavali, David Kenfack, Moses Libalah, Yadvinder Malhi, Jean‐Remy Makana, Raphaël Pélissier, Pierre Ploton, Adeline Serckx, Bonaventure Sonké, Tariq Stévart, Duncan W. Thomas, Charles De Cannière, Jan Bogaert,
Large tropical trees and a few dominant species were recently identified as the main structuring elements of tropical forests. However, such result did not translate yet into quantitative approaches which are essential to understand, predict and monitor forest functions and composition over large, often poorly accessible territories. Here we show that the above-ground biomass (AGB) of the whole forest can be predicted from a few large trees and that the relationship is proved strikingly stable in ...
Tópico(s): African Botany and Ecology Studies
2015 - Nature Portfolio | Scientific Reports
Pierre Ploton, Frédéric Mortier, Nicolas Barbier, Guillaume Cornu, Maxime Réjou‐Méchain, Vivien Rossi, Alfonso Alonso, Jean‐François Bastin, Nicolas Bayol, Fabrice Bénédet, Pulchérie Bissiengou, Georges Chuyong, Benoît Demarquez, Jean‐Louis Doucet, Vincent Droissart, Narcisse Guy Kamdem, David Kenfack, Hervé Memiaghe, Moses Libalah, Bonaventure Sonké, Nicolas Texier, Duncan W. Thomas, Donatien Zébazé, Raphaël Pélissier, Sylvie Gourlet‐Fleury,
Abstract Forest biomass is key in Earth carbon cycle and climate system, and thus under intense scrutiny in the context of international climate change mitigation initiatives (e.g. REDD+). In tropical forests, the spatial distribution of aboveground biomass (AGB) remains, however, highly uncertain. There is increasing recognition that progress is strongly limited by the lack of field observations over large and remote areas. Here, we introduce the Congo basin Forests AGB (CoFor-AGB) dataset that contains ...
Tópico(s): Remote Sensing in Agriculture
2020 - Nature Portfolio | Scientific Data
Jérôme Kasparian, Roland Ackermann, Yves-Bernard André, G. Méchain, G. Méjean, B. Prade, Philipp Rohwetter, Estelle Salmon, K. Stelmaszczyk, Jin Yu, A. Mysyrowicz, R. Sauerbrey, L. Wöste, Jean‐Pierre Wolf,
Lightning research needs on-demand lightning strikes, because of the random character of natural lightning. Lasers have been proposed as alternatives to the current technique using rocket-pulled wires, because they would expectedly provide more flexibility. However, high-energy, nanosecond lasers cannot provide long connected plasma channels. In contrast, we recently reported the triggering of electric events in thunderclouds using ultrashort laser pulses. Further improvements of the laser pulse ...
Tópico(s): Advanced Fiber Laser Technologies
2008 - Springer Nature | Journal of the European Optical Society Rapid Publications
Jérôme Kasparian, Roland Ackermann, Yves-Bernard André, G. Méchain, G. Méjean, B. Prade, Philipp Rohwetter, Estelle Salmon, K. Stelmaszczyk, Jin Yu, A. Mysyrowicz, R. Sauerbrey, L. Woeste, Jean‐Pierre Wolf,
We investigated the possibility to trigger real-scale lightning using ionized filaments generated by ultrashort laser pulses in the atmosphere. Under conditions of high electric field during two thunderstorms, we observed a statistically significant number of electric events synchronized with the laser pulses, at the location of the filaments. This observation suggests that corona discharges may have been triggered by filaments.
Tópico(s): Combustion and flame dynamics
2008 - Optica Publishing Group | Optics Express
Christophe Salomon, Christian Bordé, Pierre Fayet,
... the metre.Two scientists, Jean-Baptiste Delambre and Pierre Méchain, were sent to the field in 1792 to ...
Tópico(s): History and advancements in chemistry
2019 - Elsevier BV | Comptes Rendus Physique
Patrick Marcellin, F Péquignot, Elisabeth Delarocque‐Astagneau, Jean–Pierre Zarski, Nathalie Ganne–Carrié, Patrick Hillon, Denise Antona, M. Bovet, M. Méchain, Tarik Asselah, Jean‐Claude Desenclos, Éric Jougla,
Background/Aims Mortality related to HCV and HBV infections was estimated in France. Methods A random sample ( n =999) of death certificates was obtained from all death certificates listing HBV, HCV, hepatitis, liver disease, possible complication of cirrhosis, bacterial infection, HIV, or transplantation ( n =65,000) in France in 2001. Physicians who reported the deaths were sent a questionnaire to identify how many deaths were related to HBV/HCV infection. Completed forms were independently analyzed by a panel ...
Tópico(s): Hepatitis B Virus Studies
2007 - Elsevier BV | Journal of Hepatology
Produção Nacional
Revisado por pares
Jean‐François Bastin, Ervan Rutishauser, James R. Kellner, Sassan Saatchi, Raphaël Pélissier, Bruno Hérault, Ferry Slik, Jan Bogaert, Charles De Cannière, Andrew R. Marshall, John R. Poulsen, Patricia Alvarez‐Loyayza, Ana Andrade, Albert Angbonga‐Basia, Alejandro Araujo‐Murakami, Luzmila Arroyo, Narayanan Ayyappan, C. P. de Azevedo, Olaf Bánki, Nicolas Barbier, Jorcely Barroso, Hans Beeckman, Robert Bitariho, Pascal Boeckx, Katrin Boehning‐Gaese, Hilandia Brandão, Francis Q. Brearley, Mireille Breuer Ndoundou Hockemba, Roel Brienen, José Luís Camargo, Ahimsa Campos‐Arceiz, Benoît Cassart, Jérôme Chave, Robin L. Chazdon, Georges Chuyong, David B. Clark, Connie J. Clark, Richard Condit, Eurídice N. Honorio Coronado, Priya Davidar, Thalès de Haulleville, Laurent Descroix, Jean‐Louis Doucet, Aurélie Dourdain, Vincent Droissart, Duncan Thomas, Javier Silva Espejo, Santiago Espinosa, Nina Farwig, Adeline Fayolle, Ted R. Feldpausch, António Ferraz, Christine Fletcher, Krisna Gajapersad, Jean‐François Gillet, Iêda Leão do Amaral, Christelle Gonmadje, James Grogan, David J. Harris, Sebastián K. Herzog, Jürgen Homeier, Wannes Hubau, Stephen P. Hubbell, Koen Hufkens, Johanna Hurtado, Narcisse Guy Kamdem, Elizabeth Kearsley, David Kenfack, Michael Kessler, Nicolas Labrière, Yves Laumonier, Susan G. W. Laurance, Susan G. W. Laurance, Simon L. Lewis, Moses Libalah, Gauthier Ligot, Jon Lloyd, Thomas Ε. Lovejoy, Yadvinder Malhi, Beatriz Schwantes Marimon, Ben Hur Marimon, Emmanuel H. Martin, Paulus Matius, Victoria Meyer, Casimero Mendoza Bautista, Abel Monteagudo‐Mendoza, Arafat Mtui, David Neill, Germaine Alexander Parada Gutierrez, Guido Pardo, Marc Parren, N. Parthasarathy, Oliver L. Phillips, Nigel C. A. Pitman, Pierre Ploton, Quentin Ponette, B. R. Ramesh, Jean-Claude A. Razafimahaimodison, Maxime Réjou‐Méchain, Samir Gonçalves Rolim, Hugo Romero Saltos, Luiz Marcelo Brum Rossi, Wilson Roberto Spironello, Francesco Rovero, Philippe Saner, Denise Sasaki, Mark Schulze, Marcos Silveira, James Singh, Plínio Sist, Bonaventure Sonké, José D. Soto, Cíntia Rodrigues de Souza, Juliana Stropp, Martin J. P. Sullivan, Ben Swanepoel, Hans ter Steege, John Terborgh, Nicolas Texier, Takeshi Toma, Renato Valencia, Luis Valenzuela, Leandro Valle Ferreira, Fernando Cornejo Valverde, Tinde van Andel, Rodolfo Vasque, Hans Verbeeck, Vivek Pandi, Jason Vleminckx, Vincent Antoine Vos, Fabien Wagner, Papi Puspa Warsudi, Verginia Wortel, Roderick Zagt, Donatien Zébazé,
Abstract Aim Large tropical trees form the interface between ground and airborne observations, offering a unique opportunity to capture forest properties remotely and to investigate their variations on broad scales. However, despite rapid development of metrics to characterize the forest canopy from remotely sensed data, a gap remains between aerial and field inventories. To close this gap, we propose a new pan‐tropical model to predict plot‐level forest structure properties and biomass from only ...
Tópico(s): Remote Sensing in Agriculture
2018 - Wiley | Global Ecology and Biogeography
G. Méchain, G. Méjean, Roland Ackermann, Philipp Rohwetter, Yves-Bernard André, Jérôme Kasparian, B. Prade, K. Stelmaszczyk, Jin Yu, Estelle Salmon, W. P. Winn, L. A. Schlie, A. Mysyrowicz, R. Sauerbrey, L. Wöste, Jean‐Pierre Wolf,
Tópico(s): Advanced Fiber Laser Technologies
2005 - Springer Science+Business Media | Applied Physics B
Maxime Réjou‐Méchain, Frédéric Mortier, Jean‐François Bastin, Guillaume Cornu, Nicolas Barbier, Nicolas Bayol, Fabrice Bénédet, Xavier Bry, Gilles Dauby, Vincent Deblauwe, Jean‐Louis Doucet, Charles Doumenge, Adeline Fayolle, Claude García, Jean-Paul Kibambe Lubamba, Jean‐Joël Loumeto, Alfred Ngomanda, Pierre Ploton, Bonaventure Sonké, Catherine Trottier, Ruppert Vimal, Olga Diane Yongo, Raphaël Pélissier, Sylvie Gourlet‐Fleury,
Africa is forecasted to experience large and rapid climate change1 and population growth2 during the twenty-first century, which threatens the world's second largest rainforest. Protecting and sustainably managing these African forests requires an increased understanding of their compositional heterogeneity, the environmental drivers of forest composition and their vulnerability to ongoing changes. Here, using a very large dataset of 6 million trees in more than 180,000 field plots, we jointly model ...
Tópico(s): Remote Sensing in Agriculture
2021 - Nature Portfolio | Nature
Roland Ackermann, G. Méchain, G. Méjean, Riad Bourayou, M. Rodriguez, K. Stelmaszczyk, Jérôme Kasparian, Jia Yu, Estelle Salmon, Stelios Tzortzakis, Yves-Bernard André, J.-F. Bourrillon, L. Tamin, J.-P. Cascelli, Carmen Jurjo Campo, C. Davoise, A. Mysyrowicz, R. Sauerbrey, L. Wöste, Jean‐Pierre Wolf,
Tópico(s): Advanced Fiber Laser Technologies
2005 - Springer Science+Business Media | Applied Physics B
... Baptiste-Joseph Delambre led the northern portion and Pierre-Francois-André Méchain led the southern portion of the meridian expedition. ...
Tópico(s): Historical Astronomy and Related Studies
2003 - Elsevier BV | The American Journal of Cardiology
... Measure of All Things (2002), the careful, meticulous Pierre-François-André Méchain and the tortured, overreaching Jean-Baptiste-Joseph Delambre. ...
Tópico(s): Intelligence, Security, War Strategy
2008 - Johns Hopkins University Press | Technology and Culture
Lucie Zinger, Pierre Taberlet, Heidy Schimann, Aurélie Bonin, Frédéric Boyer, Marta De Barba, Philippe Gaucher, Ludovic Gielly, Charline Giguet‐Covex, Amaia Iribar, Maxime Réjou‐Méchain, Gilles Rayé, Delphine Rioux, Vincent Schilling, Blaise Tymen, Jérôme Viers, Cyril Zouiten, Wilfried Thuiller, Éric Coissac, Jérôme Chave,
Tropical forests shelter an unparalleled biological diversity. The relative influence of environmental selection (i.e., abiotic conditions, biotic interactions) and stochastic-distance-dependent neutral processes (i.e., demography, dispersal) in shaping communities has been extensively studied for various organisms, but has rarely been explored across a large range of body sizes, in particular in soil environments. We built a detailed census of the whole soil biota in a 12-ha tropical forest plot ...
Tópico(s): Mycorrhizal Fungi and Plant Interactions
2018 - Wiley | Molecular Ecology
M. Samimi, Lucie Molet, Maxime Fleury, Hélène Laude, A. Carlotti, Charlotte Gardair, Martine Baudin, L. Gouguet, E. Maubec, M. Avenel-Audran, É. Estève, E. Wierzbicka-Hainaut, N. Bénéton, F. Aubin, Flore Rozenberg, N. Dupin, Marie‐Françoise Avril, G. Lorette, Serge Guyétant, Pierre Coursaget, Antoine Touzé,
... Cochin Inserm U1016 Université Paris Descartes 22 Rue Méchain 75014 Paris France Search for other works by ... Cochin Inserm U1016 Université Paris Descartes 22 Rue Méchain 75014 Paris France Search for other works by ... Cochin Inserm U1016 Université Paris Descartes 22 Rue Méchain 75014 Paris France Search for other works by ... Cochin Inserm U1016 Université Paris Descartes 22 Rue Méchain 75014 Paris France Search for other works by ... Cochin Inserm U1016 Université Paris Descartes 22 Rue Méchain 75014 Paris France Search for other works by ...
Tópico(s): Antenna Design and Analysis
2015 - Oxford University Press | British Journal of Dermatology
Pierre Ploton, Nicolas Barbier, Pierre Couteron, Cécile Antin, Narayanan Ayyappan, Natesan Balachandran, N. Barathan, Jean‐François Bastin, Georges Chuyong, Gilles Dauby, Vincent Droissart, Jean‐Philippe Gastellu‐Etchegorry, Narcisse Guy Kamdem, David Kenfack, Moses Libalah, Gislain II Mofack, Stéphane Momo Takoudjou, Sourabh Pargal, Pascal Pétronelli, Christophe Proisy, Maxime Réjou‐Méchain, Bonaventure Sonké, Nicolas Texier, Thomas Deffieux, Philippe Verley, D. Zebaze Dongmo, Uta Berger, Raphaël Pélissier,
Very high spatial resolution (VHSR) optical satellite imagery has shown good potential to provide non-saturating proxies of tropical forest aboveground biomass (AGB) from the analysis of canopy texture, for instance through the Fourier Transform Textural Ordination method. Empirical case studies however showed that the relationship between Fourier texture features and forest AGB varies across forest types and regions of the world, limiting model transferability. A better understanding of the biophysical ...
Tópico(s): Remote Sensing and LiDAR Applications
2017 - Elsevier BV | Remote Sensing of Environment
Pierre Godart, Patrick Méchain,
Tópico(s): Healthcare Systems and Practices
2006 - LED Edizioni Universitarie | Relations Beyond Anthropocentrism