Search | SciELO

Need help?

Add field +

Search history

No documents were found for your search

Results: 17

au:NUNES, JOSE MARCOS DE CASTRO

Filters

Collection + Options

All
Brazil

15
Chile

1
Mexico

1

Journal + Options

All
Acta Botanica Brasilica

5
Rodriguésia

4
Brazilian Journal of Oceanography

2
Biota Neotropica

1
Hidrobiológica

1
Ocean and Coastal Research

1
Pesquisa Agropecuária Brasileira

1
Revista de biología marina y oceanografía

1
Scientia Agricola

1

Language

All
Portuguese

8

Publication Year + Options

All
2012

3
2008

2
2013

2
2019

2
2021

2
2006

1
2009

1
2011

1
2014

1
2016

1
2022

1

SciELO Thematic Areas + Options

All
Biological Sciences

12
Exact and Earth Sciences

4
Agricultural Sciences

2

WoS Subject Categories + Options

All
Plant

9
Sciences

9
Biology

4
Ecology

4
Freshwater

4
Marine

4
Oceanography

4
Agriculture

2
Multidisciplinary

2
Animal

1
Biodiversity

1
Conservation

1
Dairy

1
Science

1

WoS Citation Index + Options

All
Science Citation Index Expanded

12
Social Sciences Citation Index

1

Citables and non citables

All
Citable

17

Type of Literature + Options

All
Article

14
Brief report

1
Rapid communication

1
Review article

1

Order by

Page of 2 Next

Select this page

Print | Send to email | Export |

Facebook
Twitter
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

0 Selected itens

List all
Erase all

Occurrence and distribution of Scrippsiella cf. acuminata (Dinophyta, Thoracospharaceae) in a tropical estuarine gradient
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Nunes, Caio Ceza da Silva

; Silva, Daniela Mariano Lopes da

; Affe, Helen Michelle de Jesus

; Nunes, José Marcos de Castro

Rodriguésia

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2022, Volume 73 elocation e02162020

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo Scrippsiella acuminata é um complexo de espécies que pode causar condições anóxicas na coluna d’água durante florações. Este estudo teve como objetivo analisar a ocorrência e distribuição de Scrippsiella cf. acuminata ao longo do gradiente estuarino do rio Paraguaçu, a partir de coletas bimestrais (março de 2018 a março de 2019) realizadas em 12 pontos amostrais. Variáveis ambientais foram medidas in situ, e amostras de água foram coletadas para análise de nutrientes inorgânicos dissolvidos e densidade de células fitoplanctônicas. Em cada ponto, as amostras foram coletadas para análise da composição das espécies e preservadas com formaldeído com concentração final de 4%. S. cf. acuminata ocorreu em todo o gradiente estuarino (salinidade 0,1–38,9), exceto em julho, coincidindo com as menores concentrações de nutrientes inorgânicos dissolvidos. A densidade celular variou entre 20 células L-1 (janeiro de 2019) e 1,8 × 106 células L-1 (março de 2018); neste último, ocorreu uma floração em condições de baixa salinidade (5,7) e a maior concentração de nutrientes inorgânicos dissolvidos registrada para o estudo. A densidade celular (1,7 × 105 L-1) aumentou novamente em novembro de 2018. Nenhum dos eventos teve efeitos prejudiciais no sistema estuarino. Este estudo permitiu-nos compreender melhor os padrões de distribuição de S. cf. acuminata considerando as características ambientais que podem favorecer seu desenvolvimento.

Abstract Scrippsiella acuminata is a species complex that can cause anoxic conditions in the water column during blooms. This study aimed to analyze the occurrence and distribution of Scrippsiella cf. acuminata along the estuarine gradient of Paraguaçu River, from bimonthly sampling (March 2018 to March 2019) performed at 12 sampling points. Environmental variables were measured in situ, and water samples were collected for analysis of dissolved inorganic nutrients and phytoplankton cell density. At each point, samples were collected for analysis of species composition and preserved with formaldehyde at a final concentration of 4%. S. cf. acuminata occurred throughout the estuarine gradient (salinity 0.1–38.9), except in July, coinciding with the lowest concentrations of dissolved inorganic nutrients. Cell density varied between 20 cel L-1 (January 2019) and 1.8 × 106 cell L-1 (March 2018); in the latter, the species bloomed under conditions of low salinity (5.7) and the highest dissolved inorganic nutrient concentration recorded in the study. Cell density (1.7 × 105 L-1) increased in November 2018. Neither event had any detrimental effects on the estuarine system. This study allowed us to better understand the distribution patterns of S. cf. acuminata considering the environmental characteristics that can favor its development.

https://doi.org/10.1590/2175-7860202273068

Narasin inclusion for feedlot lambs fed a diet containing high amounts of ground flint corn
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Polizel, Daniel Montanher

; Marques, Samuel Sutil

; Westphalen, Mariana Fontana

; Gouvea, Vinícius Nunes

; Ferraz Júnior, Marcos Vinícius de Castro

; Miszura, Alexandre Arantes

; Barroso, José Paulo Roman

; Limede, Arnaldo Cintra

; Ferreira, Evandro Maia

; Pires, Alexandre Vaz

Scientia Agricola

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2021, Volume 78 N. 6 elocation e20200010

Abstract: En | Text: En | PDF: En

ABSTRACT: Narasin is an antibacterial agent that may change rumen fermentation. Two experiments were proposed to evaluate the efficiency of narasin inclusion for lambs fed a diet containing high amounts of ground flint corn. Thirty rumen-cannulated wethers were used to evaluate nutrient digestibility, nitrogen balance, and rumen metabolism (Exp. 1); and forty-five lambs were used to evaluate performance (Exp. 2) of animals fed with narasin for high flint corn diets. The experimental diets were: control or basal diet without additives (C); 25 mg of monensin kg−1 of dry matter (DM) (M); and inclusion of 5 (N5), 10 (N10), and 15 (N15) mg of narasin kg−1 of DM. The statistical analyses were performed using the MIXED procedure of SAS. Monensin increased DM digestibility compared to C ( p = 0.01) and increasing doses of narasin linearly increased DM digestibility ( p < 0.01). There was a quadratic effect ( p = 0.10) for molar proportion of acetate peaking at N15. Monensin inclusion increased ( p = 0.07) propionate compared to C; however, it did not differ from narasin. The increasing levels of narasin linearly decreased the total volatile fatty acids concentration in the rumen ( p = 0.02). Monensin and C showed a similar performance. The increasing levels of narasin linearly increased ( p ≤ 0.04) average daily gain and feed efficiency. Monensin and narasin changed rumen fermentation and improved overall nutrient digestibility. However, lambs that received narasin showed improved performance when compared with animals that received M.

https://doi.org/10.1590/1678-992x-2020-0010 873 downloads

Phytoplankton community in a tropical estuarine gradient after an exceptional harmful bloom of Akashiwo sanguinea (Dinophyceae) in the Todos os Santos Bay
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Affe, Helen Michelle de Jesus

; Conceição, Lorena Pedreira

; Rocha, Diogo Souza Bezerra

; Proença, Luis Antônio de Oliveira

; Nunes, José Marcos de Castro

Ocean and Coastal Research

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2021, Volume 69 elocation e21008

Abstract: En | Text: En | PDF: En

Abstract The objective of this study was to evaluate variations in the composition and abundance of the phytoplankton community after an exceptional harmful bloom of Akashiwo sanguinea that occurred in Todos os Santos Bay (BTS) in early March, 2007. Samples were collected every ten days, between April, 2007 and March, 2008, from the estuarine gradient of the Paraguaçu River to BTS. The physical and chemical variables were measured in situ using a multiparameter sensor. Water samples were collected for analysis of the dissolved inorganic nutrient concentrations and for the study of composition and abundance of the microphytoplankton. Overall, 135 taxa were identified, with a higher richness of diatoms. The total cell density ranged from 2.92 × 103 to 1.16 × 107 (5.47 × 105 ± 1.69 × 106) cells L−1, with higher values in the freshwater zone than in the marine area. Five species showed peaks of abundance throughout the study, forming small blooms. Four of these blooms occurred in the rainy season, formed by the species Guinardia striata (April, 2007), Scrippsiella cf. acuminata (August, 2007), Euglena gracilis (August, 2007), and Skeletonema cf. costatum (September, 2007), while a new bloom of the species Akashiwo sanguinea occurred during the dry season (December, 2007). The environment was typically oligotrophic, with low spatiotemporal variation in the concentrations of dissolved nutrients. Even so, we observed short-term variations in the structure and composition of the phytoplankton community, demonstrated by rapid bloom events, followed by an increase in the total abundance of microphytoplankton, especially during the rainy season. The blooms did not cause any notable changes in the water column and did not present any harmful effects on the system.

https://doi.org/10.1590/2675-2824069.20-004hmdja 250 downloads

Reproductive morphology and phenological aspects of one morphological variant of Hypnea pseudomusciformis (Gigartinales, Rhodophyta)
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Jesus, Priscila Barreto de

; Pestana, Edilene Maria dos Santos

; Affe, Helen Michelle de Jesus

; Rocha, Diogo Souza Bezerra

; Caires, Taiara Aguiar

; Nunes, José Marcos de Castro

; Schnadelbach, Alessandra Selbach

Acta Botanica Brasilica

Journal Metrics
- Sobre o periódico
- SciELO Analytics

mar 2019, Volume 33 N. 1 Pages 67 - 77

Abstract: En | Text: En | PDF: En

ABSTRACT Hypnea pseudomusciformis was recently described from South America, and has three morphological variants: “musciformis”, “nigrescens”, and “valentiae”. Information on the biology of these variants may help to explain this species’ wide morphological variation despite the absence of genetic divergence among variants. More morphological and ecological data has accumulated on the “musciformis” variant occurring on the Brazilian coast than for the others. In this study, we described the reproductive morphology of a tropical “nigrescens” population and investigated its phenology to provide crucial biological information about this taxon, and perhaps also assist in answering questions about the systematics of H. pseudomusciformis variants. The population analyzed showed no significant fluctuations in its total biomass throughout the year. All reproductive stages were frequently recorded during this study, which contributes greatly to our knowledge of the reproductive morphology of the “nigrescens” variant. Phenological variations were correlated with environment variables, such as air and sea-surface temperatures, insolation, precipitation, and humidity. Male gametophytes were frequently present, which has never been reported for the “musciformis” variant. We showed that, despite being members of the same genetic species, the “nigrescens” and “musciformis” morphological variants exhibit remarkable differences in their ecology and biology.

https://doi.org/10.1590/0102-33062018abb0247 966 downloads

Marine microalgae on the southern coast of Bahia, Brazil: composition and new records of phytoplankton species
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Affe, Helen Michelle de Jesus

; Santos, Lorena Petersen Nascimento

; Santos, Márcio Ferreira dos

; Nunes, José Marcos de Castro

Rodriguésia

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2019, Volume 70 elocation e03632017

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo A comunidade fitoplanctônica representa o primeiro elo na cadeia trófica aquática e o conhecimento de sua composição é uma ferramenta importante para a caracterização ecológica de um sistema. Inclusive como indicador potencial de impactos antrópicos na água. O litoral sul da Bahia é um dos segmentos da costa brasileira em melhor estado de preservação ambiental, ainda conhecendo-se muito pouco à respeito da sua biodiversidade, especialmente a ficoflora marinha. Com o objetivo de caracterizar a composição do microfitoplâncton (> 20 µm) nesta região, foram coletadas amostras, em arrastos horizontais de subsuperfície, utilizando-se rede de plâncton (20 µm de malha) para estudar a composição da comunidade. Amostras de água foram coletadas com garrafa de Van Dorn, para analisar a densidade celular do microfitoplâncton. Foram identificados um total de 149 taxa, distribuídos nos filos: Bacillariophyta, Miozoa, Cianobacteria, Euglenophyta, Haptophyta e Ochrophyta. As diatomáceas (63%) e os dinoflagelados (26%) foram os grupos mais representativos na composição específica e 43 novas occorrências taxonômicas foram registradas para a costa da Bahia, litoral do Nordeste e litoral do Brasil.

Abstract The phytoplankton community is the first link in the aquatic trophic chain and knowledge of its composition is an important tool for ecological characterization; including as potential indicator of anthropic impacts. The southern coast of Bahia is one of the best preserved parts of the Brazilian coast, however, little is known about its biodiversity, especially on marine phycoflora. With the objective of characterizing the composition of microphytoplankton (> 20 µm) in this region, samples were collected by a horizontal dredger using a plankton net (20 µm mesh size) to study the community composition. Water samples were taken from the subsurface using a Van Dorn bottle in order to analyze phytoplanktonic cell concentration. A total of 149 taxa were identified, distributed in the following phyla: Bacillariophyta, Miozoa, Cyanobacteria, Euglenophyta, Haptophyta, and Ochrophyta. Diatoms (63%) and dinoflagellates (26%) were the most representative groups in the specific composition. 43 new taxonomic occurrences were recorded for the coasts of Bahia, Northeastern Brazilian coast, and Brazilian coast.

https://doi.org/10.1590/2175-7860201970052 916 downloads

Rhodoliths in Brazil: Current knowledge and potential impacts of climate change
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Horta, Paulo Antunes

; Riul, Pablo

; Amado Filho, Gilberto M.

; Gurgel, Carlos Frederico D.

; Berchez, Flávio

; Nunes, José Marcos de Castro

; Scherner, Fernando

; Pereira, Sonia

; Lotufo, Tito

; Peres, Letícia

; Sissini, Marina

; Bastos, Eduardo de Oliveira

; Rosa, João

; Munoz, Pamela

; Martins, Cintia

; Gouvêa, Lidiane

; Carvalho, Vanessa

; Bergstrom, Ellie

; Schubert, Nadine

; Bahia, Ricardo G.

; Rodrigues, Ana Claudia

; Rörig, Leonardo

; Barufi, José Bonomi

; Figueiredo, Marcia

Brazilian Journal of Oceanography

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2016, Volume 64 N. spe2 Pages 117 - 136

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo Bancos de rodolitos formam oásis de alta biodiversidade em ambientes marinhos de fundo arenoso. Os rodolitos são formados por espécies bioconstrutoras, que fornecem abrigo e substrato para diversas e abundantes comunidades bentônicas. No Brasil esses ambientes são frequentes, representando grandes "fábricas" de carbonato com um papel fundamental no ciclo biogeoquímico do carbono no Atlântico Sul. Estes organismos e ambientes estão ameaçados pelas mudanças climáticas (principalmente a acidificação dos oceanos e o aquecimento global) e pelos estressores locais, tais como os impactos causados pela pesca e as descargas costeiras de efluentes. Neste trabalho fazemos uma revisão da taxonomia, filogenia e biologia desses organismos, com destaque para os efeitos previstos das mudanças climáticas e suas relações com estressores locais. A maioria dos estudos acerca dos efeitos das mudanças climáticas e da acidificação dos oceanos em algas calcárias relatam respostas negativas não só no crescimento e na calcificação, mas também no processo de fotossíntese, espessura da parede celular, reprodução e sobrevivência das algas. Este cenário reforça a necessidade em estabelecer uma consistente rede de trabalho para proporcionar um programa de monitoramento amplo e de longo prazo, bem como infraestrutura para avaliações experimentais de impactos locais e regionais das mudanças climáticas e dos estressores locais em bancos de rodolitos.

Abstract Rhodolith beds are important marine benthic ecosystems, representing oases of high biodiversity among sedimentary seabed environments. They are found frequently and abundantly, acting as major carbonate 'factories' and playing a key role in the biogeochemical cycling of carbonates in the South Atlantic. Rhodoliths are under threat due to global change (mainly related to ocean acidification and global warming) and local stressors, such as fishing and coastal run-off. Here, we review different aspects of the biology of these organisms, highlighting the predicted effects of global change, considering the additional impact of local stressors. Ocean acidification (OA) represents a particular threat that can reduce calcification or even promote the decalcification of these bioengineers, thus increasing the eco-physiological imbalance between calcareous and fleshy algae. OA should be considered, but this together with extreme events such as heat waves and storms, as main stressors of these ecosystems at the present time, will worsen in the future, especially if possible interactions with local stressors like coastal pollution are taken into consideration. Thus, in Brazil there is a serious need for starting monitoring programs and promote innovative experimental infrastructure in order to improve our knowledge of these rich environments, optimize management efforts and enhance the needed conservation initiatives.

https://doi.org/10.1590/S1679-875920160870064sp2 12795 downloads

Uso da técnica de confusão sexual no manejo populacional de Cryptoblabes gnidiella (Lepidoptera: Pyralidae) em videira
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Oliveira, José Eudes de Morais

; Fernandes, Maria Herlândia de Araújo

; Gama, Farah de Castro

; Botton, Marcos

; Carvalho, Andréa Nunes Moreira de

Pesquisa Agropecuária Brasileira

Journal Metrics
- Sobre o periódico
- SciELO Analytics

nov 2014, Volume 49 N. 11 Pages 853 - 859

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

O objetivo deste trabalho foi avaliar a eficiência da técnica de confusão sexual, com o feromônio sexual sintético composto (Z)-11-hexadecenal (Z11-16: Ald) a 1,8% e (Z)-13-octadecenal (Z13-18: Ald) a 1,8%, no controle da população de traça-dos-cachos, Cryptoblabes gnidiella (Lepidoptera: Pyralidae), em cultivares de videiras (Vitis vinifera) destinadas à produção de vinhos. Os experimentos foram realizados em duas localidades na região do Vale do São Francisco, em áreas comerciais de produção de uva para processamento, com as cultivares Cabernet Sauvignon, Petit Verdot, Tempranillo e Chenin Blanc. Os tratamentos avaliados foram os seguintes: confusão sexual com uso de liberadores Splat ("specialized pheromone and lure application technology"), aplicados com pistola manual a 500 pontos por hectare (2 g por ponto); e testemunha sem aplicação. O efeito da técnica sobre os adultos de C. gnidiella foi avaliado com uso de armadilha tipo Delta, iscada em um septo com 2 g de feromônio sintético da mesma formulação. Os danos nos cachos foram avaliados à colheita. O uso da técnica de confusão sexual reduziu a captura de adultos de C. gnidiella em mais de 59% na 'Tempranillo', 68% na 'Chenin Blanc', 80% na 'Cabernet Sauvignon' e 97% na 'Petit Verdot'. À época da colheita, os danos nos frutos foram reduzidos de 65 a 100% nas áreas tratadas. O feromônio sexual sintético é eficaz para reduzir o acasalamento de C. gnidiella em vinhedos, com o uso da técnica de confusão sexual.

The objective of this work was to evaluate the efficiency of mating disruption technique, with the synthetic sex pheromone compound (Z)-11-hexadecenal (Z11-16: Ald) at 1.8% and (Z)-13-octadecenal (Z13-18: Ald) at 1.8%, for controlling the honeydew moth, Cryptoblabes gnidiella (Lepidoptera: Pyralidae), population in grape (Vitis vinifera) cultivars destined to wine production. The experiments were carried out in two locations in the region of São Francisco Valley, Brazil, in commercial production areas of grapes used for processing, with the cultivars Cabernet Sauvignon, Petit Verdot, Tempranillo, and Chenin Blanc. The evaluated treatments were: mating disruption using Splat (specialized pheromone and lure application technology) releasers, applied at 500 points per hectare (2 g per point); and a control without application. The effect of the technique was evaluated on adults of C. gnidiella using Delta type trap baited with 2 g of synthetic pheromone of the same formulation. The damage on grape clusters was evaluated at harvest. The use of mating disruption technique reduced the capture of adult C. gnidiella in more than 59% in 'Tempranillo', 68% in 'Chenin Blanc', 80% in 'Cabernet Sauvignon', and 97% in 'Petit Verdot'. At harvest, fruit damage was reduced from 65 to 100% in the treated areas. The synthetic sex pheromone is effective in reducing C. gnidiella mating in vineyards, using the mating disruption technique.

https://doi.org/10.1590/S0100-204X2014001100004 2663 downloads

Proposal of a fertility index of Hypnea for ecophysiological studies
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Aguiar Caires, Taiara

; Barros de Matos, Mara Rojane

; de Mattos Lyra, Goia

; de Aquino Assis, José Geraldo

; de Castro Nunes, José Marcos

Revista de biología marina y oceanografía

Journal Metrics
- Sobre o periódico
- SciELO Analytics

dec 2013, Volume 48 N. 3 Pages 635 - 639

Abstract: En | Text: En | PDF: En

Few studies of natural populations of the red algae Hypnea musciformis have been conducted. To enhance our knowledge, it would be helpful to define methodologies that explore the species' adaptability to different environments and seasons. Tetrasporophyte is the most frequent reproductive stage in this species. A case study of 2 populations in the Brazilian tropics allowed us to define a fertility index based on the meiotic count of tetrasporangia. Significant differences were found in the production of tetrasporangia among microhabitats and between the dry and rainy seasons. The analysis of this index in red algae may constitute an important tool for understanding the biology and ecology of this algal group.

914 downloads

Evaluation of the stocks of Hypnea musciformis (rhodophyta: gigartinales) on two beaches in Bahia, Brazil
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Caires, Taiara Aguiar

; Costa, Iara Oliveira

; Jesus, Priscila Barreto de

; Matos, Mara Rojane Barros de

; Pereira-Filho, Guilherme Henrique

; Nunes, José Marcos de Castro

Brazilian Journal of Oceanography

Journal Metrics
- Sobre o periódico
- SciELO Analytics

mar 2013, Volume 61 N. 1 Pages 65 - 71

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Hypnea musciformis ocorre amplamente na costa nordeste do Brasil, sendo uma das mais importantes fontes naturais de k-carrageenana que é utilizado nas indústrias alimentícia e cosmética. Apesar do potencial de explotação, pouco se sabe sobre sua ecologia. O objetivo deste estudo foi conhecer a biologia e ecologia de H. musciformis no Brasil através da análise do estoque de biomassa e da flora acompanhante. Duas populações de H. musciformis foram analisadas nas praias de Stella Maris e Itacimirim (Bahia, Brasil). Oito amostragens foram realizadas entre 2007 e 2009, durante as estações seca e chuvosa. As algas foram coletadas ao longo de transectos (20 m) utilizando quadrados (0,04 m²) em três diferentes regiões hidrodinâmicas dos recifes (TP, PRR e FRR). t-Test, Teste de Dunn e ANOVA paramétrica e não-paramétrica foram utilizados para a análise estatística. Foram identificadas 17 espécies hospedeiras e 41 espécies associadas. O maior estoque de biomassa foi observado durante a estação seca. Em Stella Maris, a região com maior estoque de biomassa foi FRR, e em Itacimirim, TP apresentou biomassa maior. Este estudo permite supor que sazonalidade, microhabitats, hidrodinamismo e fatores em microescala contribuem para a variação no estoque de biomassa em populações de H. musciformis.

Hypnea musciformis occurs widely in the northeast coast of Brazil, and it is one of the most important natural sources of k-carrageenan, which is used in food and cosmetic industries. Despite its potential for exploitation little is known about its ecology. The aim of this study was to investigate the biology and ecology of H. musciformis in Brazil through analyses of biomass stock and accompanying flora. Two populations of H. musciformis were analyzed: those on the beaches of Stella Maris and Itacimirim (Bahia, Brazil). Eight samplings were conducted between 2007 and 2009 during the dry and rainy seasons. The algae were sampled along transects (20 m) using quadrats (0.04 m²) in three different hydrodynamic regions of the reefs (TP, PRR and FRR). The t-Test, Dunn's Test and parametric and nonparametric ANOVA were used for statistical analyses. 17 host species and 41 associated species were identified. The highest biomass stock was observed during the dry season. On Stella Maris, the region with the highest biomass stock was FRR; on Itacimirim, TP had the highest biomass value. This study permits the assumption that seasonality, microhabitat, hydrodynamic and micro scale factors contribute to variation in biomass stock in H. musciformis populations.

2444 downloads Cited 1 time in SciELO

10.

Estudos morfológicos e taxonômicos em Hypnea cornuta (Kützing) J. Agardh (Gigartinales, Rhodophyta) no litoral da Bahia, Brasil
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Jesus, Priscila Barreto de

; Nunes, José Marcos de Castro

Acta Botanica Brasilica

Journal Metrics
- Sobre o periódico
- SciELO Analytics

dec 2012, Volume 26 N. 4 Pages 973 - 978

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Durante estudo sobre as espécies de Hypnea do litoral do estado da Bahia foram encontrados exemplares de Hypnea cornuta (Kützing) J. Agardh em coletas realizadas no extremo sul do estado. Este é o primeiro relato de H. cornuta para o estado da Bahia, Brasil. É fornecida uma caracterização detalhada dos aspectos morfológicos, anatômicos e reprodutivos desta espécie.

During study of the species of Hypnea of the coast of Bahia specimens of Hypnea cornuta (Kützing) J. Agardh were found in the southern state. This is the first report of H. cornuta for the state of Bahia, Brazil. It is provided a detailed characterization of morphological, anatomical and reproductive aspects of this species.

https://doi.org/10.1590/S0102-33062012000400027 2626 downloads

11.

Coleção de microalgas de ambientes dulciaquícolas naturais da Bahia, Brasil, como potencial fonte para a produção de biocombustíveis: uma abordagem taxonômica
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Mendes, Maria Cristina de Queiroz

; Gonzalez, Augusto Abilio Comas

; Menezes, Mariângela

; Nunes, José Marcos de Castro

; Pereira, Solange

; Nascimento, Iracema Andrade

Acta Botanica Brasilica

Journal Metrics
- Sobre o periódico
- SciELO Analytics

sep 2012, Volume 26 N. 3 Pages 691 - 696

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

O presente trabalho envolveu a identificação taxonômica de espécies nativas de microalgas (isoladas de ecossistemas dulciaquícolas localizados nos arredores de Salvador, Bahia) integrantes da Coleção de Microalgas dulciaquícolas do LABIOMAR/IB/UFBA, visando estudos taxonômicos mais aprofundados (ultraestruturais e moleculares) e experimentos que possam avaliar sua capacidade para suprir cadeias produtivas de biocombustíveis. As coletas foram realizadas nos arredores de Salvador, Bahia, Brasil. A identificação das espécies foi efetuada com base em caracteres morfológicos. Foram identificados 19 táxons, 12 em nível de espécie e nove em nível de gênero, sendo 14 Chlorophyceae (Chlamydomonas sp1, Chlamydomonas sp2, Chlamydomonas sp3, Chlamydocapsa bacillus (Teiling) Fott, Chlorococcum sp1, Chlorococcum sp2), Coelastrum indicum Turn.. Coelastrum microporum Nägeli, Desmodesmus brasiliensis (Bohl.) Hegew, Scenedesmum obliquus (Turpin) Kütz, Ankistrodesmus falcatus (Corda) Ralfs, Ankistrodesmus fusiformis Corda, Kirchneriella lunaris (Kirchner.) Möbius, Pseudokirchneriella subcapitata (Korshikov) F. Hindák), três Trebouxiophyceae (Botryococcus braunii Kütz., Botryococcus terribilis Komárek et Marvan e Chlorella vulgaris Beijerinck), uma Bacillariophyceae (Nitzschia sp.) e uma Cyanobacteria (Synechocystis sp.).

This study identified native species of microalgae (maintained at LABIOMAR/IB/UFBA Collection of Freshwater Microalgae) to indicate their potential to supply the biofuel production chain. Samples were collected in freshwater ecosystems around Salvador, Bahia, Brazil. Species identification was based in morphological characteristics. Nineteen species were isolated and identified, 12 at the level of species and nine at the level of genus: 14 Chlorophyceae (Chlamydomonas sp1, Chlamydomonas sp2, Chlamydomonas sp3, Chlamydocapsa bacillus (Teiling) Fott, Chlorococcum sp1, Chlorococcum sp2, Coelastrum indicum Turn. Coelastrum microporum Nägeli, Desmodesmus brasiliensis (Bohl.) Hegew, Scenedesmum obliquus (Turpin) Kütz, Ankistrodesmus falcatus (Corda) Ralfs, Ankistrodesmus fusiformis Corda, Kirchneriella lunaris (Kirchner.) Möbius, Pseudokirchneriella subcapitata (Korshikov) F. Hindák), three Trebouxiophyceae (Botryococcus braunii Kütz., Botryococcus terribilis Komárek et Marvan and Chlorella vulgaris Beijerinck), one Bacillariophyceae (Nitzschia sp.) and one Cyanobacteria (Synechocystis sp.).

https://doi.org/10.1590/S0102-33062012000300019 8511 downloads

12.

Macroalgas bentônicas associadas a bancos de Hypnea musciformis (Wulfen) J.V. Lamour. (Rhodophyta - Gigartinales) em duas praias do litoral baiano
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Costa, Iara Oliveira

; Caires, Taiara Aguiar

; Pereira Filho, Guilherme Henrique

; Nunes, José Marcos de Castro

Acta Botanica Brasilica

Journal Metrics
- Sobre o periódico
- SciELO Analytics

jun 2012, Volume 26 N. 2 Pages 493 - 507

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Este trabalho caracteriza a estrutura e dinâmica das comunidades de macroalgas bentônicas associadas a populações de H. musciformis ocorrentes em formações recifais nas praias de Stella Maris (Salvador) e Itacimirim (Camaçari). As coletas ocorreram entre agosto de 2007 e junho de 2008. As formações recifais foram divididas em compartimentos com base no hidrodinamismo. Utilizou-se três transectos em cada compartimento, onde foram dispostos cinco quadrados de 20 x 20 cm. Foram obtidos dados de riqueza, biomassa, percentual de importância (Pi%), diversidade (H') e equitabilidade (J'). Na área estudada ocorreram 60 espécies: 30 Rhodophyta, 20 Chlorophyta e 10 Ochrophyta; biomassa média de 136 g.m-² (peso seco); e índices médios de H' e J' de 2,7 e 0,97, respectivamente. Houve predominância das rodofíceas, tanto em riqueza específica quanto em valores de biomassa. Foi encontrada maior contribuição do grupo morfo-funcional de algas corticadas. Dentre a flora associada, Gelidiella acerosa, Sargassum cymosum e Palisada perforata apresentaram maiores valores de biomassa. O compartimento recifal mais representativo em riqueza específica e biomassa foi a região frontal do recife. As comunidades das praias estudadas foram consideradas distintas devido à fisionomia das formações recifais.

This study characterized the structure and dynamics of macroalgae communities associated with benthic populations of H. musciformis occurring in reef formations on the beaches of Stella Maris (Salvador) and Itacimirim (Camaçari), Bahia. The samples were collected between August 2007 and June 2008. The reef formations were divided into compartments based on hydrodynamics. Three transects where made for each compartment, and each of these had five quadrants of 20 x 20cm. Data about the richness, biomass, percentage of importance (Pi%), diversity (H') and evenness (J') was collected. The study recorded 60 species, 30 Rhodophyta, 20 Chlorophyta and 10 Ochrophyta, which had an average biomass of 136 g.m-² (dry weight) and average rates of H' and J' of 2.7 and 0.97, respectively. There was a predominance of red algae, both in values of richness and in biomass. The contribution of the morpho-functional group of the cortical algae was greater. Among the flora recorded, Gelidiella acerosa, Sargassum cymosum and Palisada perforata had higher biomasses. The reef compartment with the highest species richness and biomass was the frontal region. The communities of the beaches studied were considered distinct because of the physiognomy of the reef formations.

https://doi.org/10.1590/S0102-33062012000200025 5822 downloads

13.

Dotyophycus pacificum I. A. Abbott (Liagoraceae, Rhodophyta) a new record for the Atlantic Ocean
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Nunes, José Marcos de Castro

; Guimarães, Silvia Maria Pita de Beauclair

; Bouzon, Zenilda L.

; Horta, Paulo Antunes

Acta Botanica Brasilica

Journal Metrics
- Sobre o periódico
- SciELO Analytics

mar 2011, Volume 25 N. 1 Pages 241 - 248

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Durante estudo sobre as rodofíceas do litoral do estado da Bahia foram encontrados exemplares de Dotyophycus pacificum Abbott em coletas realizadas a 23-36 metros de profundidade. Os espécimes foram estudados detalhadamente e comparados a espécies morfologicamente semelhantes. Esta é a primeira ocorrência de D. pacificum para o oceano Atlântico.

Specimens of Dotyophycus pacificum I. A. Abbott were found during a survey of Rhodophyta on the coast of Bahia state. The samples were taken from 23-36 meters depth and the specimens found were studied in detail and compared to other morphologically similar species. This is the first time that the genus Dotyophycus is cited for the Atlantic Ocean.

https://doi.org/10.1590/S0102-33062011000100028 1963 downloads

14.

Primeira referência de plantas gametofíticas em Spermothamnion nonatoi (Ceramiales, Rhodophyta)
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Nunes, José Marcos de Castro

; Guimarães, Silvia Maria Pita de Beauclair

Rodriguésia

Journal Metrics
- Sobre o periódico
- SciELO Analytics

jun 2009, Volume 60 N. 2 Pages 259 - 264

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO Durante estudo sobre as rodofíceas do litoral do estado da Bahia foram encontrados exemplares gametofíticos e esporofíticos de Spermothamnion nonatoi A.B. Joly. O material estudado é proveniente de diferentes coletas realizadas no médio e infralitoral. Apesar da espécie ter sido citada para várias regiões do litoral brasileiro, somente plantas inférteis ou esporofíticas haviam sido encontradas. Este trabalho apresenta descrição e ilustrações das estruturas masculinas e femininas da espécie.

ABSTRACT During studies on Rhodophyta from the coastline of Bahia State, gametophytic and sporophytic specimens of Spermothamnion nonatoi A.B. Joly were found. The specimens were collected in the midlittoral and infralittoral zone. Although this species was referred from many regions of the Brazilian coast, only infertile or sporophytic specimens have been found. The present paper presents the description and illustrations of the male and female structures of the species.

https://doi.org/10.1590/2175-7860200960202 273 downloads

15.

Novas referências de rodofíceas marinhas bentônicas para o litoral brasileiro
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Nunes, José Marcos de Castro

; Guimarães, Silvia Maria Pita de Beauclair

Biota Neotropica

Journal Metrics
- Sobre o periódico
- SciELO Analytics

dec 2008, Volume 8 N. 4

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Sete táxons de rodofíceas marinhas bentônicas são referidos pela primeira vez para o litoral brasileiro: Acrochaetium corymbiferum (Thur. in Le Jolis) Batters, A. liagorae Børgesen, Aglaothamnion herveyi (M. Howe) Aponte, D.L. Ballant. & J.N. Norris, Crouanophycus latiaxis (L.A. Abbott) Athanas., Grallatoria reptans M. Howe e Gelidiella sanctarum Feldmann & Hamel. Gelidiopsis repens (Kütz.) Weber Bosse é pela primeira vez referido para o Oceano Atlântico. As coletas foram realizadas no medio e infralitoral. O material está depositado no Herbário Alexandre Leal Costa. Referência da descrição original, basiônimo, descrição morfológica, distribuição geográfica e comentários taxonômicos são apresentados para cada táxon estudado.

Seven taxa of benthic marine rodophytes are reported for the first time from the Brazil littoral: Acrochaetium corymbiferum (Thur. in Le Jolis) Batters, A. liagorae Børgesen, Aglaothamnion herveyi (M. Howe) Aponte, D.L. Ballant. & J.N. Norris, Crouanophycus latiaxis (L.A. Abbott) Athanas., Grallatoria reptans M. Howe and Gelidiella sanctarum Feldmann & Hamel. Gelidiopsis repens (Kütz.) Weber Bosse this is the new reference to the Atlantic Ocean. The material collected on mediolittoral and infralittoral was deposited in the Herbarium Alexandre Leal Costa (ALCB) at the Universidade Federal da Bahia. Reference to the original description, basionym, morphological description, geographical distribution and taxonomical comments are presented for each taxon studied.

4396 downloads Cited 1 time in SciELO

Showing

itens per page

Page of 2 Next

Select one or more results

All Alphabetic

Results

Comparative chart Download CSV

Statistics of

Send result

To*

Use ; (semicolon) to insert more emails.

Send to email

This page

Selected records

All references (max. 300)

Your email

Subject

Comments

Export format:

RIS (for EndNote, ProCite, Reference Manager, RefWorks, Citavi, etc.)

BibTeX

Citation

CSV (for Excel, etc)

Export:

This page

Selected itens

All references (max. 2000)

Sem resultados

No documents were found for your search

Glossary and search help

You can enrich your search in a very simple way. Use the search indexes combined with the connectors (AND or OR) and specify more your search.

For example, if you want to search for articles about
cases of dengue in Brasil in 2015, use:
ti:dengue and publication_year:2015 and aff_country:Brasil

See below the complete list of search indexes that can be used:

Index code	Element
ti	article title
au	author
kw	article keywords
subject	subject (title words, abstract and keywords)
ab	abstract
ta	journal short title (e.g. Cad. Saúde Pública)
journal_title	journal full title (e.g. Cadernos de Saúde Pública)
la	publication language code (e.g. pt - Portuguese, es - Spanish)
type	document type
pid	publication identifier
publication_year	publication year of publication
sponsor	sponsor
aff_country	country code of the author's affiliation
aff_institution	author affiliation institution
volume	article volume
issue	article issue
elocation	elocation
doi	DOI number
issn	journal ISSN
in	SciELO colection code (e.g. scl - Brasil, col - Colômbia)
use_license	article usage license code

SciELO - Scientific Electronic Library Online
Rua Dr. Diogo de Faria, 1087 – 9º andar – Vila Clementino 04037-003 São Paulo/SP - Brasil
Email: scielo@scielo.org

All the contents of this site www.scielo.br, except where otherwise noted, is licensed under a Creative Commons Attribution License.
more »