Institute Pesquisas

Rio de Janeiro, Brazil

Institute Pesquisas

Rio de Janeiro, Brazil
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de Barros C.M.,Federal University of Rio de Janeiro | da Fonte Carvalho Martins D.,Federal University of Rio de Janeiro | Mello A.D.A.,Federal University of Rio de Janeiro | Salgado L.T.,Institute Pesquisas | Allodi S.,Federal University of Rio de Janeiro
Marine Pollution Bulletin | Year: 2017

Ascidians are good monitors for assessing water quality, since they filter large volumes of water; however, little is known about how xenobiotics, including metals, can affect ascidian hemocytes. Metals can be either toxic or beneficial to health, inducing many different responses. The response mechanism depends on the class of metals to which organisms are exposed: essential, nonessential, and borderline. To analyze the influence of metals from different classes on the protective mechanisms of an ascidian, we investigated the production of nitric oxide (NO) after exposure to various concentrations of Mg, Mn and Pb over different time periods. We also determined the amounts of each metal in the hemocytes. Our results indicated that especially Pb could stimulate NO production. Although Pb induced the highest NO production, cell viability was not severely altered in all Pb concentrations and time periods. Ascidians might serve as biomonitor for Pb, since their vanadocytes accumulate Pb. © 2017 Elsevier Ltd.

Rodriguez R.A.,Lucy Street | Herrera A.M.,The Womans Group | Riera R.,Institute Pesquisas | Escudero C.G.,University of La Laguna | Delgado J.D.,Pablo De Olavide University
Ecological Modelling | Year: 2015

A new and wide area of theoretical and methodological overlap between ecology and conventional physics has emerged from the development of an ecological state equation and its consequences. Specifically, the discontinuous (discrete) increase of the ecological equivalent (ke) of Boltzmann's constant (kB) suggests a startling hypothesis: most general principles of quantum mechanics could be valid at the ecosystem level. In this paper, we show a single result supported on previous theoretical results as well as on already published data: that a significant and robust straight line adjustment with an intercept at the coordinate's origin between the mean value of eco-kinetic energy per individual and ke at the inter-taxocenosis scale has a regression constant (slope) whose mantissa coincides with the Planck's constant mantissa at the 1000th level. From this result, we propose two simple equations, with increasing exactness, to assess the expected mean values of individual eco-kinetic energy per survey at the inter-taxocenosis level with a reliable statistical adjustment in comparison with the respective observed values. This result means that the evolutionary process as a whole could be understood as a "staggered propulsion" of a tiny initial clot of life that has been ecologically driven across a discontinuous evolutionary gradient of exchange of information by trophic energy with an increment rate ruled by constant quantum parameters. The potential meaning of this finding for evolutionary ecology and our understanding of the ecosystem functioning is analyzed, and the future challenges to develop a holistic theoretical framework based on this result are stated. © 2015 Elsevier B.V.

Cardoso D.B.O.S.,State University of Feira de Santana | de Queiroz L.P.,State University of Feira de Santana | de Lima H.C.,Institute Pesquisas
Kew Bulletin | Year: 2012

Summary: The new large tree species Luetzelburgia amazonica D. B. O. S. Cardoso, L. P. Queiroz & H. C. Lima is described, illustrated and discussed based on collections from the state of Rondônia in Brazil. It is the only species of the genus occurring in the Amazon basin. Luetzelburgia amazonica resembles L. trialata (Ducke) Ducke based on the number and morphology of leaflets, fruit size and the dark brown sericeous indumentum on the inflorescence, but differs mainly in its larger flowers, pinkish petals and very distinct standard petal shape. © 2012 The Board of Trustees of the Royal Botanic Gardens, Kew.

PubMed | Institute Pesquisas and University of La Laguna
Type: | Journal: Marine environmental research | Year: 2016

Intertidal mollusks are subjected to an intense environmental pressure, from human-induced stressors, mainly harvesting, to competition for food and space with other species. Here we used mollusk shell size as a measure of size distribution and reproductive potential of intertidal limpets. Two species of exploited limpets (Patella candei crenata and Patella aspera) were monitored throughout the littoral of Tenerife (Canary Islands, NE Atlantic Ocean), an overpopulated island with a high coastal pressure. The exploitation of these two limpet species is controlled by regional legislation, with seasonal closures and limits of harvest for professional (10 kg) and recreational harvesters (3-5 kg). A long-term comparison (1994-2014) of limpet size has been conducted as a surrogate of the state of conservation of these two limpets. Both species showed populations dominated largely by small-sized individuals (<30 mm) and a lack of large adults (>60 mm). The proximity to coastal settlements was not a factor to explain limpet assemblage structure. The temporal (1994-2014) comparative study showed a sharp decrease in the mean size of both limpet species (7 mm in P. aspera and 5 mm in P. candei crenata). These results might be indicative of overharvesting of both species in Tenerife. The conservation of the two studied species needs to be accomplished by the strict fulfillment of current protective strategies, as well as the creation of marine protected areas where intertidal harvesting is totally banned all over the year.

Kollmann L.J.C.,Museu de Biologia Prof. Mello Leitao MBML | Peixoto A.L.,Institute Pesquisas
Candollea | Year: 2013

Begonia pachypoda L. Kollmann & Peixoto (Begoniaceae), a new species known only from Alegre in the Atlantic Forest of the state of Espírito Santo in Brazil, is described. We established that it is currently cultivated and misidentified under the name Begonia leathermaniae O'Reilly & Kareg. Description, illustration and comments about geographic distribution of this new species are provided. It is morphologically related to Begonia aconitifolia A. DC. and Begonia platanifolia Schott. The name Begonia leathermaniae must be used only for another species from Bolivia. © CONSERVATOIRE ET JARDIN BOTANIQUES DE GENÈVE 2013.

Haigh A.,Herbarium | Mayo S.J.,Herbarium | Coelho M.A.N.,Institute Pesquisas
Kew Bulletin | Year: 2011

Anthurium morii, A. raimundii, A. talmonii and A. zappiae are proposed as new species from the state of Bahia in north-eastern Brazil. A. raimundii occurs in the restinga vegetation of the Bahian Atlantic Forest region, while the other three species are from the seasonally dry campo rupestre vegetation of the interior of the state. Descriptions, illustrations and IUCN conservation ratings are provided for each species. © 2011 The Board of Trustees of the Royal Botanic Gardens, Kew.

Torke B.M.,New York Botanical Garden | Mansano V.D.F.,Institute Pesquisas
Kew Bulletin | Year: 2013

Summary: To advance ongoing revisionary research on the neotropical genus Swartzia, we studied herbarium collections from the southern Amazonian Craton of Brazil. Among these collections four previously undocumented species were discovered: Swartzia lanata, S. prancei, S. rugosa and S. rondoniensis, each individually diagnosable and endemic to the region. In this paper we provide formal descriptions for these and make a new combination for a fifth, S. arumateuana. The new species are known from few collections and are divided evenly among sections Recurvae and Terminales, the two most speciose sections of the genus in the region. This study provides further evidence that the southern Amazonian Craton, while less central to the diversification of Swartzia than the Guiana Shield, is nevertheless important both as an area of species diversity and endemism. © 2013 The Board of Trustees of the Royal Botanic Gardens, Kew.

Pinto R.B.,University of Campinas | Torke B.M.,New York Botanical Garden | de Mansano V.F.,Institute Pesquisas
Brittonia | Year: 2012

In advance of an updated monographic revision of Swartzia (Leguminosae), we discuss the taxonomy of the genus in extra-Amazonian Brazil and present descriptions of five new species. All of the new species are narrowly distributed in eastern Brazil in threatened Atlantic wet forest and coastal scrub habitats. Four of them-S. alagoensis, S. arenophila, S. revoluta, and S. submontana-belong to the diverse and taxonomically challenging section Acutifoliae, which has undergone extensive evolutionary radiation in the region. The fifth, S. thomasii, is a member of the otherwise Amazonian section Glabriplantae and is only subtly distinct from the Amazonian species S. reticulata. The new species and other recent additions to the genus are incorporated in a key to the species of Swartzia of extra-Amazonian Brazil. © 2011 The New York Botanical Garden.

Leal R.N.,Institute Pesquisas | Bassi D.,University of Ferrara | Posenato R.,University of Ferrara | Amado-Filho G.M.,Institute Pesquisas
Journal of Coastal Research | Year: 2012

Bioerosion at all scales is now recognized as playing a major role in facies interpretation. Macroscopic and microscopic borings can provide an indication of water depth, if they can be attributed to the action of specific borers. Tomographic analysis is a new method for assessing bioerosion, for identifying boring taxa, as well as for calculating the volume and porosity in present-day rhodoliths. The tomographic system provides also a quantification of the calcium carbonate produced by bioerosion. Recent rhodoliths collected at 20-m water depth on the Abrolhos Bank, Brazil, have been multiscann analyzed. The study shows that rhodoliths from this site are characterized by a highly diversified assemblage of boring bivalves and sponges associated producing the ichnogenera Gastrochaenolites and Entobia. The fauna from this boring assemblage can remove up to 10% of the rhodolith volume. The method can be expected to yield similar results as applied to both modern and fossil rhodoliths from other localities and time frames. © 2012, the Coastal Education & Research Foundation (CERF).

Di Maio F.R.,Estácio de Sá University | Peixoto A.L.,Institute Pesquisas
Brittonia | Year: 2012

Four new species of Ixora (Rubiaceae, Ixoreae) from Brazil are described and illustrated and their relationships to morphologically similar species as well as their conservation status are discussed. The new species, Ixora cabraliensis, Ixora emygdioi, Ixora grazielae, and Ixora pilosostyla are endemic to the Atlantic Forest of southern Bahia and Espirito Santo. © 2012 The New York Botanical Garden.

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