Results 61 to 70 of about 51,999 (232)

The Role of Gene Flow in the Diversification of the Monkey Treefrog Complex Across the South American Dry Diagonal

open access: yesZoologica Scripta, EarlyView.
ABSTRACT Understanding Neotropical megadiversity remains challenging due to fundamental taxonomic issues, including identifying and describing cryptic species and their distribution, and the limited knowledge of key factors driving biological diversification. Such challenges are especially prominent in diverse clades with high levels of cryptic species,
Felipe Camurugi   +10 more
wiley   +1 more source

Species richness and beta-diversity of aquatic macrophytes assemblages in three floodplain tropical lagoons: evaluating the effects of sampling size and depth gradients [PDF]

open access: yes, 2002
Using aquatic macrophyte data gathered in three lagoons of the Paraná River floodplain we showed a strong effect of sample size on species richness. Incidence-based species richness estimators (Chao 2, jackknife 1, jackknife 2, incidence-based coverage ...
Bini, L., Souza, D., Thomaz, S.
core  

Systematics of Marmosa Subgenus Micoureus With Emphasis in ‘rapposa’ Group (Didelphidae, Marmosini): Geographic Variation and Revalidation of M. budini

open access: yesZoologica Scripta, EarlyView.
ABSTRACT Micoureus is the most species‐rich subgenus within the genus Marmosa. Conflicting arrangements regarding the number of species comprising this subgenus have been proposed and the validity of M. budini has been debated. Here, we used an approach integrating genetic and morphological data were conducted to reanalyze the ‘rapposa’ group ...
Maria Clara Santos Ribeiro   +3 more
wiley   +1 more source

Avaliação da diversidade arbórea das ilhas do rio Paraguai na região de Cáceres, Pantanal Matogrossense, Brasil Assessment of tree diversity on the islands of the Paraguay River, in the Caceres region, Pantanal, Brazil

open access: yesActa Botânica Brasílica, 2011
A diversidade de plantas está associada à heterogeneidade de habitats, à ampla distribuição de espécies, ao pulso de inundação que podem estar sendo controlados pela dinâmica fluvial e diferenças na origem geomorfológica.
Solange Kimie Ikeda Castrillon   +3 more
doaj   +1 more source

Avaliação de matrizes bovinas no Pantanal. [PDF]

open access: yes, 2013
No início do século XX inicou-sse a introdução de gado zebu, de origem indiana (Bos taurus indicus) no Pantanal. A partir de então, por meio de cruzamentos contínuos, as raças zebuínas absorveram praticamente toda a população do Tucura (Bos taurus taurus)
ABREU, U. G. P. de, SERENO, J. R. B.
core   +1 more source

Research Trends on Trace Element Contamination in Brazilian Urban Lentic Ecosystems: Environmental and Policy Drivers

open access: yesInternational Review of Hydrobiology, Volume 111, Issue 1, June 2026.
ABSTRACT Lentic ecosystems are vulnerable to contamination by trace elements, which can accumulate and pose risks to aquatic life and human health. In a large, developing country such as Brazil, marked by vast geographic, environmental, and socioeconomic diversity, it is crucial to understand how these factors shape research on this group of ...
Maria C. F. Neuenschwander   +4 more
wiley   +1 more source

Mapeamento de risco de Incêndios para sub-região da Nhecolândia, Pantanal/MS

open access: yesBiodiversidade Brasileira, 2019
Os incêndios trazem grandes prejuízos ao Pantanal a cada ano, por sua característica de longos períodos de estiagem com baixa umidade e elevada temperatura, somando a alguns tipos de fitosionomias que favorece a disseminação de incêndios, acarretando em
Balbina Maria Araujo Soriano   +3 more
doaj   +3 more sources

Análise da pele de três espécies de peixes: histologia, morfometria e testes de resistência

open access: yesRevista Brasileira de Zootecnia, 2003
O objetivo deste trabalho foi analisar a pele de três espécies de peixes (piavuçu Leporinus macrocephalus, pacu prata Mylossoma sp e piraputanga Brycon hilarii) através de análise histologica e morfometrica e testes de resistência após o curtimento ...
Maria Luiza R. Souza   +7 more
doaj  

Da pré-história à história indígena

open access: yesRevista de Arqueologia, 2003
Nesta tese de doutorado o autor analisa criticamente a história e a historiografia da arqueologia pantaneira, desde a segunda metade do século XIX até fins do século XX, e aborda o processo de ocupação indígena das terras baixas do Pantanal, desde os ...
Jorge Eremites de Oliveira
doaj   +1 more source

A complete checklist with new records and geographical distribution of the rove beetles (Coleoptera, Staphylinidae) of Brazil [PDF]

open access: yes, 2013
This paper presents the first comprehensive list of 2,688 species of Staphylinidae (Coleoptera) recorded from Brazil. The list is based on the taxonomic and ecological literature, and new records from some insect collections, and includes locality ...
Asenjo, Angélico   +4 more
core  

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