Results 31 to 40 of about 68,258 (308)

Invasão biológica por Prosopis juliflora (Sw.) DC.: impactos sobre a diversidade e a estrutura do componente arbustivo-arbóreo da caatinga no Estado do Rio Grande do Norte, Brasil Biological invasion by Proposis juliflora (Sw.) DC.: impacts on diversity and structure of the shrubby-arboreal component of caatinga in the State of Rio Grande do Norte, Brazil

open access: yesActa Botânica Brasílica, 2009
Este trabalho teve como objetivos estudar os impactos causados pela invasão da algaroba - Prosopis juliflora (Sw.) DC. sobre a fitodiversidade e a estrutura do componente arbustivo arbóreo da caatinga.
Leonaldo Alves de Andrade   +2 more
doaj   +1 more source

Bryophytes from some Caatinga areas in the state of Bahia (Brazil) [PDF]

open access: yes, 1998
The caatinga is a deciduous and xerophilous vegetation that covers large areas in Brazil. An irregular rainfall with a marked dry period is a characteristic feature.
Albertos, Belén   +2 more
core  

Determinação do fator de cobertura e dos coeficientes da MUSLE em microbacias no semiárido brasileiro

open access: yesRevista Brasileira de Engenharia Agrícola e Ambiental, 2014
Objetivou-se, neste estudo, calibrar e validar os fatores C da Equação Universal de Perdas de Solo e os coeficientes da Equação Universal de Perdas de Solo Modificada, para as coberturas de Caatinga Nativa, Caatinga Raleada e Capim (pós desmatamento e ...
Júlio C. N. dos Santos   +5 more
doaj   +1 more source

The flexible, the stereotyped and the in‐between: putting together the combinatory tool use origins hypothesis

open access: yesBiological Reviews, EarlyView.
ABSTRACT Tool use research has long made the distinction between tool using that is considered learned and flexible, and that which appears to be instinctive and stereotyped. However, animals with an inherited tool use specialisation can exhibit flexibility, while tool use that is spontaneously innovated can be limited in its expression and facilitated
Jennifer A. D. Colbourne   +1 more
wiley   +1 more source

Pastos e manejo do pastejo de áreas dependentes de chuva. [PDF]

open access: yes, 2017
Sistemas pecuários de produção em condições de sequeiro. Manipulação da vegetação da caatinga para exploração pecuária. Caatinga rebaixada. Caatinga raleada. Caatinga rebaixada-raleada. Caatinga enriquecida. Caatinga desmatada.
DUBEUX JUNIOR, J. C. B.   +3 more
core  

Tracing the origins and evolution of nymphalid butterflies (Lepidoptera) in the Atlantic Forest

open access: yesEcography, EarlyView.
Understanding the relative roles of diversification and dispersal is key to explaining large‐scale biogeographical patterns. Although both processes are known to shape biodiversity, their relative contributions remain understudied for many organisms. Here, we examine how these processes have jointly contributed to the exceptional diversity and endemism
Mar Repullés   +7 more
wiley   +1 more source

Use of Neurospora crassa as fungus model for systems biology of Moniliophthora perniciosa hyphae proteins: case study of polygalacturonases : S01P13 [PDF]

open access: yes, 2013
Moniliophthora perniciosa, the fungus responsible for the witches' broom disease, brought serious problems to cacao (Theobroma cacao L.) cultivation in the infected areas such as in Southern Bahia, Brazil.
Carvalho, H.A.S.   +2 more
core  

Improving glass Ionomer performance through plant extracts: a systematic review of in vitro studies

open access: yesBiomaterial Investigations in Dentistry
Objective: This systematic review aimed to systematically map and synthesize the available evidence from in vitro studies on the modification of Glass Ionomer Cements (GICs) with plant extracts, with a specific focus on evaluating their effects on the ...
Israel Luís Diniz Carvalho   +7 more
doaj   +1 more source

EXCURSÕES E AULA DE CAMPO EM GEOGRAFIA: UM OLHAR DIFERENTE SOBRE O SEMIÁRIDO

open access: yesRevista Ensino de Geografia, 2020
O semiárido nordestino envolve uma área de aproximadamente 1.120.000 km² distribuído entre 1.262 municípios. Embora seja tratado muitas vezes como ambiente seco e adverso, o semiárido apresenta uma ampla diversidade de elementos naturais, histórico ...
Thiago dos Santos Dantas   +1 more
doaj   +1 more source

Evapotranspiration Profiles and Trends in Seasonally Dry and Seasonally Humid Tropical Forests

open access: yesInternational Journal of Climatology, EarlyView.
Moisture availability and vegetation are decisive factors in ET variations, which are greater in the Atlantic Forest. Precipitation contributes positively to ET variations (r = 0.20–0.67). Significant trends (p < 0.05) in ET were identified, with opposing patterns.
Lucas de Morais Teixeira   +5 more
wiley   +1 more source

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