Littérature scientifique sur le sujet « Forest and humid savannah ecosystems »
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Articles de revues sur le sujet "Forest and humid savannah ecosystems":
Leach, Melissa, Bernard Bett, M. Said, Salome Bukachi, Rosemary Sang, Neil Anderson, Noreen Machila et al. « Local disease–ecosystem–livelihood dynamics : reflections from comparative case studies in Africa ». Philosophical Transactions of the Royal Society B : Biological Sciences 372, no 1725 (5 juin 2017) : 20160163. http://dx.doi.org/10.1098/rstb.2016.0163.
Bond, William J., et Guy F. Midgley. « Carbon dioxide and the uneasy interactions of trees and savannah grasses ». Philosophical Transactions of the Royal Society B : Biological Sciences 367, no 1588 (19 février 2012) : 601–12. http://dx.doi.org/10.1098/rstb.2011.0182.
Madjima, Soro Nounfro, Ehouman N’guetta Moïse, Toure Mamadou, Ouattara Noufou Doudjo et Tiho Seydou. « Diversité Et Dynamique Des Communautés De Vers De Terre De Trois Formations Végétales Dans Une Savane Humide De l’Afrique De l’Ouest (Lamto, Côte d’Ivoire) ». European Scientific Journal, ESJ 14, no 27 (30 septembre 2018) : 281. http://dx.doi.org/10.19044/esj.2018.v14n27p281.
Burbridge, Rachel E., Francis E. Mayle et Timothy J. Killeen. « Fifty-thousand-year vegetation and climate history of Noel Kempff Mercado National Park, Bolivian Amazon ». Quaternary Research 61, no 2 (mars 2004) : 215–30. http://dx.doi.org/10.1016/j.yqres.2003.12.004.
Smith, Richard J., et Francis E. Mayle. « Impact of mid- to late Holocene precipitation changes on vegetation across lowland tropical South America : a paleo-data synthesis ». Quaternary Research 89, no 1 (10 novembre 2017) : 134–55. http://dx.doi.org/10.1017/qua.2017.89.
Sulaiman, Muhammad Ikhsan, Rita Andini, Murna Muzaifa, Leni Marlina, Rachman Jaya, Ali M. Muslih et Heru P. Widayat. « Making biodiversity work for coffee production. A case study of Gayo Arabica coffee in Indonesia ». MOJ Ecology & ; Environmental Sciences 6, no 4 (6 août 2021) : 156–62. http://dx.doi.org/10.15406/mojes.2021.06.00228.
Galy-Lacaux, C., D. Laouali, L. Descroix, N. Gobron et C. Liousse. « Long term precipitation chemistry and wet deposition in a remote dry savanna site in Africa (Niger) ». Atmospheric Chemistry and Physics 9, no 5 (3 mars 2009) : 1579–95. http://dx.doi.org/10.5194/acp-9-1579-2009.
Davidson, Eric A., Mercedes M. C. Bustamante et Alexandre de Siqueira Pinto. « Emissions of Nitrous Oxide and Nitric Oxide from Soils of Native and Exotic Ecosystems of the Amazon and Cerrado Regions of Brazil ». Scientific World JOURNAL 1 (2001) : 312–19. http://dx.doi.org/10.1100/tsw.2001.261.
Galy-Lacaux, C., D. Laouali, L. Descroix, N. Gobron et C. Liousse. « Long term precipitation chemistry and wet deposition in a remote dry savanna site in Africa (Niger) ». Atmospheric Chemistry and Physics Discussions 8, no 2 (19 mars 2008) : 5761–812. http://dx.doi.org/10.5194/acpd-8-5761-2008.
Saraiva, Sarah O., Ian D. Rutherfurd, Philip R. Kaufmann, Cecília G. Leal, Diego R. Macedo et Paulo S. Pompeu. « Wood stock in neotropical streams : Quantifying and comparing instream wood among biomes and regions ». PLOS ONE 17, no 10 (5 octobre 2022) : e0275464. http://dx.doi.org/10.1371/journal.pone.0275464.
Thèses sur le sujet "Forest and humid savannah ecosystems":
Ouafo, Mendo-Leumbe Marie-Roumy. « Etude de la composition physico-chimique, des sources émettrices et des effets sur la santé humaine des aérosols atmosphériques en zones rurales et urbaines en Afrique tropicale ». Thesis, Toulouse 3, 2017. http://www.theses.fr/2017TOU30402.
This thesis was a contribution to the INDAAF (International Deposition Network to study and Atmospheric chemistry in Africa) program. It aims was to study the physics and chemistry of atmospheric aerosol collected on two undisturbed African rural sites, representative of forest (Nsimi site Cameroon) and humid savanna (Djougou site Benin) ecosystems. Aerosols collected weekly in the PM2.5 and PM10 fractions at Nsimi, from 2004 to 2009 and at Djougou, from 2005 to 2009 were analyzed in order to characterize the seasonal variations of concentrations of the different chemical species and to identify their major sources according to the seasons. The contribution of each group of species was estimated from the total concentration of the aerosol. The results obtained allowed (1) to highlight the impact of climatic parameters on the concentration levels of the chemical species, with the dry season having the most important impact in general, (2) to identify biomass combustion sources and biofuel, terrigenous, biogenic, secondary as well as predominant in the dry season and biogenic sources, domestic fires and guttation phenomenon in the wet season, (3) to show the impact of the ecosystem and the location on emissions of aerosols: biogenic source and guttation are higher in the forest while terrigenous source is higher in wet savanna. The second part of my thesis is a part of the program POLCA (POLlution African Capitals). The main objective was to characterize particulate pollution in Yaounde, capital of Cameroon, and to study its toxicological impact on the human respiratory system. This work allowed to chemically characterize on a seasonal basis aerosols collected monthly from December 2012 to July 2013 and identify the sources. Furthermore, various tests on biological responses of human epithelial cells exposed to Yaounde aerosols were used to determine their toxicity in humans based on the component chemical species. The results showed (1) the impact of the size and number of Yaounde's particles on toxicity: the finer inducing a stronger expression of the pro-inflammatory cytokine response and anti-oxidant enzymes, (2) the impact of the chemical composition on this toxicity: aerosols with important quantities of particulate organic matter strongly induce gene expression of the metabolism of xenobiotics, especially CYP1A1
Gosling, William D. « Characterization of neotropical forest and savannah ecosystems by their modern pollen spectra ». Thesis, University of Leicester, 2004. http://hdl.handle.net/2381/30404.
Moreira, Carolina Mathias. « Avaliação de métodos fitossociológicos através de simulações de amostragens numa parcela permanente de cerradão, na Estação Ecológica de Assis, SP ». Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/11/11150/tde-05062007-134450/.
Many methodologies are available for phytosociological studies, and many attempts have been made to evaluate them. The most commonly used method employs sample plots. This technique is always referred to in the literature as the basic approach and, as such, is usually defined as the benchmark to which the other methods are compared. For this reason, it has never been evaluated on its own. This work presents the opportunity to evaluate the plot method itself and compare its results with the parametric values available from a full census of a sampling area in which the complete population data is known and contains no sampling error. Data was taken from a permanent plot located in an area of forested savannah (Assis Ecological Station, SP, Brazil), that comprises an area of 10.24 ha, and all trees over 15 cm girth at breat hight were marked, georeferenced, measured and identified. Phytosociological measures were computed with the values of density and basal area for each species in the census and represent the parametric values. Simulations were made of phytosociological surveys by sistematic sampling with four square plot sizes (10 x 10 m, 20 x 20 m, 50 x 50 m, and 100 x 100 m). Additionally, three sampling intensities were simulated for the 10x10m plots (75, 50, and 25 plots). One thousand simulated surveys were performed for each sampling situation, and for each of these surveys phytosociological measures were computed. The bias in the estimates of both density and dominance was evaluated, as well as change in species importance. The influence of spatial pattern on the estimation of phytosociological measures was also evaluated. At last, some analysis of community attributes, that are feasible with phytosociological measures were made, such as density, basal area, species acummulation curves, number of species sampled and propotion of species and individuals per density group. The 10 x 10 m sample plots showed the lowest overall bias and the lowest variation in species importance, but even in this method were observed high bias and high variation. About the spatial distribution, species with very low density showed very large bias, indenpendently of spatial pattern. Spatial pattern had a clear influence on the estimates of intermediate density species, where species with more clustered pattern showed more skewed distribution. And for the species with high density, spatial pattern does not seem to play an importante role. The community attributes analysed can be well estimated with phytosociolocical measures, just taking into consideration some usual methodological details, such as sampling size and plot distributions within the study area.
Chapitres de livres sur le sujet "Forest and humid savannah ecosystems":
Godt, Miguel Clüsener, et Malcolm Hadley. « Ecosystem rehabilitation and forest regeneration in the humid tropics : Case studies and management insights ». Dans Restoration of Tropical Forest Ecosystems, 25–36. Dordrecht : Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-017-2896-6_2.
Kauffman, Sjef, Wim Sombroek et Stephan Mantel. « Soils of rainforests Characterization and major constraints of dominant forest soils in the humid tropics ». Dans Soils of Tropical Forest Ecosystems, 9–20. Berlin, Heidelberg : Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-662-03649-5_1.
Fadairo, Olushola, Samuel Olajuyigbe, Tolulope Osayomi, Olufolake Adelakun, Olanrewaju Olaniyan, Siji Olutegbe et Oluwaseun Adeleke. « Climate Change, Rural Livelihoods, and Ecosystem Nexus : Forest Communities in Agroecological zones of Nigeria ». Dans African Handbook of Climate Change Adaptation, 1169–92. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-45106-6_155.
Ohsawa, M. « Latitudinal comparison of altitudinal changes in forest structure, leaf-type, and species richness in humid monsoon Asia ». Dans Global change and terrestrial ecosystems in monsoon Asia, 3–10. Dordrecht : Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0343-5_1.
Aabeyir, Raymond, Kenneth Peprah et Gervase Kuuwaabong. « Nexus Between Savannah Woodland Degradation and Climate Change in Northern Ghana ». Dans Environmental Sciences. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.107265.
Paruelo, José María, et Estebán G. Jobbágy. « The Grasslands and Steppes of Patagonia and the Río de la Plata Plains ». Dans The Physical Geography of South America. Oxford University Press, 2007. http://dx.doi.org/10.1093/oso/9780195313413.003.0022.
« Soil Resources and Human Adaptation in Forest and Agricultural Ecosystems in Humid Asia ». Dans World Soil Resources and Food Security, 67–182. CRC Press, 2016. http://dx.doi.org/10.1201/b11238-8.
Badmaev, Nimazhap Bayarzhapovich, Aleksandr Vladimirovich Bazarov et Roman Sergeevich Sychev. « Forest Fire Danger Assessment Using Meteorological Trends ». Dans Predicting, Monitoring, and Assessing Forest Fire Dangers and Risks, 183–208. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-1867-0.ch008.
Badmaev, Nimazhap Bayarzhapovich, Aleksandr Vladimirovich Bazarov et Roman Sergeevich Sychev. « Forest Fire Danger Assessment Using Meteorological Trends ». Dans Research Anthology on Ecosystem Conservation and Preserving Biodiversity, 1026–51. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-6684-5678-1.ch051.
Fairhead, James. « Archaeology and Environmental Anthropology : Collaborations in Historical and Political Ecology ». Dans Humans and the Environment. Oxford University Press, 2013. http://dx.doi.org/10.1093/oso/9780199590292.003.0027.
Actes de conférences sur le sujet "Forest and humid savannah ecosystems":
Wellens, Jane, Andrew K. Millington, France Gerard et Barry K. Wyatt. « Potential of ATSR-2 satellite imagery for identifying and mapping different humid tropical forest ecosystems ». Dans Satellite Remote Sensing, sous la direction de Eric Mougin, K. Jon Ranson et James A. Smith. SPIE, 1995. http://dx.doi.org/10.1117/12.200759.
Rapports d'organisations sur le sujet "Forest and humid savannah ecosystems":
Degrande, A., K. Schreckenberg, C. Mbosso et C. Mfoumou. Farmer livelihoods in the humid forest and moist savannah zones of Cameroon ICRAF Working Paper no. 47. World Agroforestry Centre (ICRAF), 2007. http://dx.doi.org/10.5716/wp15222.pdf.