Resultados de búsqueda - "Quaternary"

Late quaternary paleosol records from sutropical (38°S) to tropical (16°S) South America and palaeoclimatic implications por Zech, Wolfgang, Zech, MIchael, Zech, Roland, Peinneman, Néstor, Morras, Hector, Moretti, Lucas Martin, Ogle, Neil, Fucks, M., Kalim, R.M., Schad, P., Glaser, B.

Materias: “…Quaternary…”
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Late quaternary lahars and lava dams: fluvial responses of the upper Tana river (Kenya) por Schoorl, J.M., Veldkamp, A., Claessens, Lieven, Wijbrans, J.R., Olago, D.O., Lievens, C.

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The effects of Quaternary glaciations in Patagonia as evidenced by chloroplast DNA phylogeography of Southern beech Nothofagus obliqua por Azpilicueta, Maria Marta, Marchelli, Paula, Gallo, Leonardo Ariel

Materias: “…Quaternary…”
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Effects of wetland degradation on the hydrological regime of a quaternary catchment in the Mohlapitsi River GaMampa valley por Sarron, C.

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Regional drivers of diversification in the late Quaternary in a widely distributed generalist species, the common pheasant Phasianus colchicus por Liu, S., Liu, Y., Jelen, E., Alibadian, M., Yao, C.-T., Li, X., Kayvanfar, N., Wang, Y., Vahidi, F.S.M., Han Jianlin, Sundev, G., Zhang, Z., Schweizer, M.

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Munroa argentina, a grass of the South American transtion zone, survived the Andean uplift, aridification and glaciations of the quaternary por Amarilla, Leandro, Anton, Ana Maria Ramona, Chiapella, Jorge Oscar, Manifesto, Maria Marcela, Angulo, Diego Francisco, Sosa, Victoria

“…The South American Transition Zone (SATZ) is a biogeographic area in which not only orogeny (Andes uplift) and climate events (aridification) since the mid-Miocene, but also Quaternary glaciation cycles had an important impact on the evolutionary history of the local flora. …”
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A survey of current on-farm agricultural water management practices in Olifants Catchment: A diagnostic of quaternary catchment B72A por Ntsheme, O.

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Late Quaternary environmental changes in Misiones, subtropical NE Argentina, deduced from multi-proxy geochemical analyses in a palaeosol-sediment sequence por Zech, MIchael, Zech, Roland, Morras, Hector, Moretti, Lucas Martin, Claser, Bruno J.R., Zech, Wolfgang

“…A 4.5-m-long sediment core from a small basin in the Province of Misiones, NE Argentina, was analyzed in a multi-proxy geochemical approach (major and minor elemental composition, Corg, N, HI, OI, δ13Corg, n-alkanes and compound-specific δ13C analyses of biomarkers) in order to contribute to the reconstruction of the Late Quaternary environmental and climate history of subtropical South America. …”
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A crop yield risk analysis and mitigation of small-holder farmers at quaternary catchment level: Case study of B72A in Olifants river basin por Magombeyi, Manuel Simba, Taigbenu, A.E.

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Crop yield risk analysis and mitigation of smallholder farmers at quaternary catchment level: Case study of B72A in Olifants river basin South Africa por Magombeyi, Manuel Simba, Taigbenu, A.E.

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Stability and fragmentation versus demographic expansion: different phylogeographic patterns in closely related sympatric legumes (Senna) from arid and semi-arid zones of mid-lati... por Robbiati, Federico Omar, Nores, María Jimena, Anton, Ana María Ramona, Fortunato, Renee Hersilia

Materias: “…Quaternary Climatic Change…”
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Relatives, neighbors, or friends: Information exchanges among irrigators on new on-farm water management tools por Mekonnen, Dawit Kelemework, Yimam, Seid, Arega, Tiruwork, Matheswaran, Karthikeyan, Schmitter, P. M. V.

“…METHODS: The study used a household survey data from all members of quaternary canals in the project that were in the technology, information, and control groups, as well as detailed network modules on how farmers with plots in the quaternary canal are associated with each other. …”
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The stratigraphy and fire history of the Kutai peatlands, Kalimantan, Indonesia por Hope, G., Chokkalingam, U., Anwar, S.

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Improved sample selection and preparation methods for sampling plans used to facilitate rapid and reliable estimation of aflatoxin in chicken feed por Kibugu, J., Mdachi, R., Munga, L., Mburu, D., Whitaker, T., Thu P. Huynh, Grace, Delia, Lindahl, Johanna F.

“…The water slurring innovation (quaternary sampling) increased aflatoxin extraction efficiency to 95.1% through reduction of both bias (−4.95) and variability of recovery (1.2–1.4) and improved both intra-laboratory precision (HorRat = 1.2–1.5) and within-laboratory reproducibility (HorRat = 0.9–1.3). …”
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Assessment of groundwater availability from recession flows and instream flow requirements of rivers in South Africa por Ebrahim, Girma Yimer, Villholth, Karen G.

“…The approach was trialled for twenty-one perennial and relatively undisturbed quaternary catchments with long-term and good streamflow records. …”
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Assessment of groundwater availability from recession flows and instream flow requirements of rivers in South Africa por Ebrahim, Girma Yimer, Villholth, Karen G.

“…The approach was trialled for twenty-one perennial and relatively undisturbed quaternary catchments with long-term and good streamflow records. …”
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Forests and rivers: The archaeology of the north eastern Congo por Smith, A.L., Cornelissen, E., Francquen, C. de, Nikis, N., Mees, F., Tshibamba Mukendi, J., Beeckman, H., Bourland, N., Hubau, W.

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Improved sample selection and preparation methods for sampling plans used to facilitate rapid and reliable estimation of aflatoxin in chicken feed por Kibugu, J., Mdachi, R., Munga, L., Mburu, D., Whitaker, T., Thu P. Huynh, Grace, Delia, Lindahl, Johanna F.

“…The water slurring innovation (quaternary sampling) increased aflatoxin extraction efficiency to 95.1% through reduction of both bias (−4.95) and variability of recovery (1.2–1.4) and improved both intra-laboratory precision (HorRat = 1.2–1.5) and within-laboratory reproducibility (HorRat = 0.9–1.3). …”
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13C-NMR assignments for methyls and muaternary carbons of the limonoid obacunone por Rugutt, J.K., Fischer, N.H., Nauman, M.A., Schmidt, T.J., Berner, D.K.

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Los cambios climatológicos y la conservación del suelo en México por Terra, Helmut de

“…Studies of recent and past glaciations on the snowy peaks southeast of Mexico City throu new light on climatic cycles of the Late Quaternary Period Although some feel there is a progressive dessication, and even though it is true that ice reservoirs dwindling, this does not necessarily indicate an irreversible thend toward greater aridity. …”
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