Ecotoxicological assessment of sediments from an urban marine protected area (Xixová-Japuí State Park, SP, Brazil)

This study aimed to evaluate the environmental quality of the marine portion of Xixová-Japuí State Park (XJSP), an urban marine protected area, which is influenced by multiple contamination sources, by using ecotoxicological and geochemical analyses. Sediments were predominantly sandy, with low CaCO3 and organic matter contents, and presented contamination by metals (Cd,Cu,Zn). Acute toxicity was detected in three tested samples, and copepod exposed to sediments from four stations exhibited lower fecundities, despite the absence of significant effects. Contamination and toxicity seemed to be associated, suggesting that the environment is degraded and presents risks to the biota. Whole sediment TIE indicated ammonia as a main responsible for toxicity, suggesting sewage is a main contributor to sediment degradation. As external contamination sources seem to be negatively influencing the sediment quality, the park conservation objectives are not being fully reached, demanding actions to mitigate impacts. © 2013 Elsevier Ltd.

Avaliações dos tecidos hidrorrepelentes de equipamentos de proteção individual após usos e lavagens em condições de campo

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Critérios de manejo na irrigação do feijoeiro em três texturas de solo

Pós-graduação em Agronomia (Irrigação e Drenagem) - FCA

Deficiência hídrica em plantas de pimentão (Capsicum annum L.) fertirrigadas e seus efeitos sobre a produção de massa e parâmetros bioquímicos

Pós-graduação em Agronomia (Irrigação e Drenagem) - FCA

Crescimento e acúmulo de nutrientes do meloeiro rendilhado cultivado em substrato

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Uso do anidrido naftálico para reduzir os efeitos fitotóxicos de herbicidas inibidores da síntese de carotenóides em culturas gramíneas

Pós-graduação em Agronomia (Agricultura) - FCA

Uso de diferentes telas de sombreamento no cultivo protegido do tomateiro

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Cultivares de café Conilon (Coffea Canephora) sob estresse salino-hídrico

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Condições de aplicação de água em cinco cultivares de trigo em ambiente protegido

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Calibração de tanques evaporímetros de baixo custo sob diferentes diâmetros em ambiente protegido

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Efeito de efluente de esgoto tratado e lodo de esgoto compostado no solo e nas culturas de trigo e soja

Pós-graduação em Agronomia (Irrigação e Drenagem) - FCA

Impacto ambiental em área com aplicação de agrotóxicos no município de Brotas, SP

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Diferentes concentrações de solução nutritiva no cultivo do tomateiro em substrato de fibra de coco em ambiente protegido

Pós-graduação em Agronomia - FEIS

Arbuscular mycorrhizal fungal communities and soil aggregation as affected by cultivation of various crops during the sugarcane fallow period

Management systems involving crop rotation, ground cover species and reduced soil tillage can improve the soil physical and biological properties and reduce degradation. The primary purpose of this study was to assess the effect of various crops grown during the sugarcane fallow period on the production of glomalin and arbuscular mycorrhizal fungi in two Latosols, as well as their influence on soil aggregation. The experiment was conducted on an eutroferric Red Latosol with high-clay texture (680 g clay kg-1) and an acric Red Latosol with clayey texture (440 g kg-1 clay) in Jaboticabal (São Paulo State, Brazil). A randomized block design involving five blocks and four crops [soybean (S), soybean/fallow/soybean (SFS), soybean/millet/soybean (SMS) and soybean/sunn hemp/soybean (SHS)] was used to this end. Soil samples for analysis were collected in June 2011. No significant differences in total glomalin production were detected between the soils after the different crops. However, total external mycelium length was greater in the soils under SMS and SHS. Also, there were differences in easily extractable glomalin, total glomalin and aggregate stability, which were all greater in the eutroferric Red Latosol than in the acric Red Latosol. None of the cover crops planted in the fallow period of sugarcane improved aggregate stability in either Latosol.

Solanum americanum: reservoir for Potato virus Y and Cucumber mosaic virus in sweet pepper crops

Weeds can act as important reservoirs for viruses. Solanum americanum (Black nightshade) is a common weed in Brazil and samples showing mosaic were collected from sweet pepper crops to verify the presence of viruses. One sample showed mixed infection between Cucumber mosaic virus (CMV) and Potato virus Y (PVY) and one sample showed simple infection by PVY. Both virus species were transmitted by plant extract and caused mosaic in tomato (Solanum lycopersicum cv. Santa Clara), sweet pepper (Capsicum annuum cv. Magda), Nicotiana benthamiana and N. tabaccum TNN, and local lesions on Chenopodium quinoa, C. murale and C. amaranticolor. The coat protein sequences for CMV and PVY found in S. americanum are phylogenetically more related to isolates from tomato. We conclude that S. americanum can act as a reservoir for different viruses during and between sweet pepper crop seasons.