Results 31 to 40 of about 868 (201)

The length of the dry season may be associated with leaf scleromorphism in cerrado plants

Anais da Academia Brasileira de Ciências, 2015
Despite limitations of low fertility and high acidity of the soils, the cerrado flora is the richest amongst savannas. Many cerrado woody species show sclerophyllous leaves, which might be related to the availability of water and nutrients in the soil ...
MARCELO C. SOUZA, AUGUSTO C. FRANCO, MUNDAYATAN HARIDASAN, DAVI R. ROSSATTO, JANAÍNA F. DE ARAÚJO, LEONOR P.C. MORELLATO, GUSTAVO HABERMANN   +6 more
doaj   +1 more source

Plants from Brazilian Cerrado with Potent Tyrosinase Inhibitory Activity

PLoS ONE, 2012
The increased amount of melanin leads to skin disorders such as age spots, freckles, melasma and malignant melanoma. Tyrosinase is known to be the key enzyme in melanin production. Plants and their extracts are inexpensive and rich resources of active compounds that can be utilized to inhibit tyrosinase as well as can be used for the treatment of ...
Souza, Paula Monteiro, Elias, Silvia Taveira, Simeoni, Luiz Alberto, Paula, José Elias de, Gomes, Sueli Maria, Guerra, Eliete Neves Silva, Fonseca, Yris Maria, Silva, Elton Clementino da, Silveira, Dâmaris, Batista, Pérola de Oliveira Magalhães Dias   +9 more
openaire   +5 more sources

The scaling of seed‐dispersal specialization in interaction networks across levels of organization

Ecography, EarlyView.
Natural ecosystems are characterized by a specialization pattern where few species are common while many others are rare. In ecological networks involving biotic interactions, specialization operates as a continuum at individual, species, and community levels. Theory predicts that ecological and evolutionary factors can primarily explain specialization.
Gabriel M. Moulatlet, Pedro Luna, Wesley Dáttilo, Fabricio Villalobos   +3 more
wiley   +1 more source

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

Ecography, 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, Nicolas Chazot, Leidys Murillo‐ Ramos, Marianne Espeland, Karina Lucas Silva‐ Brandão, Alexandre Antonelli, André Victor Lucci Freitas, Pável Matos‐ Maraví   +7 more
wiley   +1 more source

Tree-Dwelling Ants: Contrasting Two Brazilian Cerrado Plant Species without Extrafloral Nectaries

Psyche: A Journal of Entomology, 2012
Ants dominate vegetation stratum, exploiting resources like extrafloral nectaries (EFNs) and insect honeydew. These interactions are frequent in Brazilian cerrado and are well known, but few studies compare ant fauna and explored resources between plant ...
Jonas Maravalhas, Jacques H. C. Delabie, Rafael G. Macedo, Helena C. Morais   +3 more
doaj   +1 more source

Do an ecosystem engineer and environmental gradient act independently or in concert to shape juvenile plant communities? Tests with the leaf-cutter ant Atta laevigata in a Neotropical savanna [PDF]

PeerJ, 2018
Background Ecosystem engineers are species that transform habitats in ways that influence other species.While the impacts of many engineers have been well described, our understanding of how their impact varies along environmental gradients remains ...
Alan N. Costa, Emilio M. Bruna, Heraldo L. Vasconcelos   +2 more
doaj   +2 more sources

LARVICIDAL ACTIVITY OF SOME CERRADO PLANT EXTRACTS AGAINST AEDES AEGYPTI

Journal of the American Mosquito Control Association, 2006
One hundred ninety hexanic and ethanolic extract from 27 plant species from the Cerrado biome of Brazil were tested for larvicidal activity against 3rd-stage Aedes aegypti larvae at 500 microg/ml. Fourteen extracts from 7 species showed activity (>65% mortality) against the larvae.
Rodrigues, A. M. S., de Paula, J. E., Dégallier, Nicolas, Molez, Jean-François, Espindola, L. S.   +4 more
openaire   +4 more sources

Effects of animal manure upon growth of Cerrado plants

Revista Ibero-Americana de Ciências Ambientais, 2020
Through excretion, animals return to the soil part of the nutrients they ingest. This input can be an alternative to artificial inorganic fertilization aiming at increasing soil nutrient concentrations in degraded areas that are prone to restoration.
Lucas Ferreira, Mairê Butzer Viñales, Lucas Lopes e Silva, Luciola Santos Lannes   +3 more
openaire   +2 more sources

State‐Level Politics in Forest Governance: The Role of the Narrative‐Policy Nexus in the Brazilian Amazon

Environmental Policy and Governance, EarlyView.
ABSTRACT Deforestation and its social impacts are an enduring challenge in agrarian frontiers, especially in the tropics. Fueled by global demand for commodities, this process is mediated by ideas, concepts, meanings, and policies that uphold socioenvironmental degradation. A key and understudied—arena in which this mediation occurs is the sub‐national
Gabriela Russo Lopes, Fabio de Castro
wiley   +1 more source

Evolution of seed dispersal in the Cerrado biome: ecological and phylogenetic considerations

Acta Botânica Brasílica, 2016
The investigation of the phylogeny of a group of organisms has the potential to identify ecological and evolutionary processes that have been occurring within a community.
Marcelo Kuhlmann, José Felipe Ribeiro
doaj   +1 more source