Results 51 to 60 of about 362,357 (213)
Moderate Fire Temperatures Affect the Structure of Clayey Oxisol Aggregates
Land Degradation &Development, EarlyView.ABSTRACT Wildfires have become increasingly frequent and intense worldwide, raising concerns about their impacts on soil systems. However, the thermal responses of clay‐rich Oxisols, dominated by Fe and Al oxides, remain poorly understood. In this study, samples from the 0 to 5 cm layer of six Oxisols were subjected to controlled heating at ...
Yasmmin Tadeu Costa +5 more
wiley +1 more source
New Ommatius Wiedemann from the Americas with two new species groups, keys, and taxonomic notes (Diptera: Asilidae) [PDF]
, 2009 Two species groups are proposed for Ommatius Wiedemann, normus and tibialis species groups, increasing the number to eight groups from the Americas. The normus group includes six species, two of which are new, O. nebulosus n. sp. and O. tepui n.
Scarbrough, Aubrey G.
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Nordic Journal of Botany, EarlyView.Stemodia diplohyptoides M.M.Sosa & Dematt. and S. lobelioides Lehm. (Gratioleae, Plantaginaceae) are reported for the first time in Paraguay, found in Alto Paraná and Presidente Hayes departments, respectively. These new records extend the known geographical range of both species, representing the northern records to date, S.
Y. Carlés Bechara +4 more
wiley +1 more source
Boletim Goiano de GeografiaAs áreas úmidas são ecossistemas na interface entre ambientes terrestres e aquáticos e, no Cerrado, elas compreendem um mosaico de vegetações hidrófilas, savanas alagáveis e manchas de florestas alagáveis e secas. Em Goiás, verifica-se que as maiores concentrações de áreas naturais do bioma, estão presentes no norte e nordeste do estado, sobretudo na ...
Ana Elisa de Lima Oliveira +1 more
openaire +1 more source
Taxonomy and diversity of Marcgraviaceae, north of the São Francisco river, northeast Brazil
Nordic Journal of Botany, EarlyView.This study provides a comprehensive assessment of Marcgraviaceae species diversity north of the São Francisco river in northeastern Brazil, analyzing species richness and distribution patterns across 384 000 km² of phytogeographic domains. Through field collections, herbarium studies (both physical and digital), and detailed morphological analyses, we ...
Thales Carvalho +4 more
wiley +1 more source
El río Paraná: de pulmón comercial a fábrica de energía (1870-1990)
Historia Ambiental Latinoamericana y Caribeña, 2016 Este artículo examina las transformaciones experimentadas por el Río Paraná en la región del Alto Paraná fronterizo entre Brasil y Paraguay entre 1870 y 1990.
Carlos Gómez Florentin
doaj +2 more sources
Geografia (Londrina), 2009 Este trabalho apresenta o estudo da dinâmica e morfologia de canais de confluência tendo como exemplo dois grandes rios tropicais o rio Paraná e o rio Paranapanema.O estudo propõe uma metodologia, ainda que semi-quantitativa, bastante atraente uma vez ...
Renato José Paes +3 more
doaj +1 more source
Distribution, antiquity and niche of pre-columbian guaraní amazonian horticulturalists in the misiones rainforest, Argentina [PDF]
, 2017 En este trabajo presentamos la distribución conocida del registro arqueológico generado por horticultores amazónicos, englobados dentro de la unidad arqueológica Guaraní, en la provincia de Misiones.
Carbonera, Miriam +1 more
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Establishing Reciprocity as A Dimension of Nonprofit Entrepreneurial Orientation
Nonprofit Management and Leadership, EarlyView.ABSTRACT This study introduces and characterizes reciprocity as a distinct sixth dimension of entrepreneurial orientation (EO) within nonprofit organizations (NPOs), specifically Brazilian Medical Associations (BMAs). Through a qualitative exploratory study using 16 BMAs as units of analysis and data from 11 in‐depth interviews with nonprofit sector ...
Fabricio Martins Lacerda +2 more
wiley +1 more source
Neotropical Ichthyology, 2011 This study presents chromosomal data of Megalonema platanum from rio Tibagi, Paraná, Brazil and from rio Paraná, Argentina. The diploid number was equal 54 with karyotype composition of 24m+16sm+2st+12a in both populations.
Rafael Augusto de Carvalho +5 more
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