Phosphorus Dynamics
Mostrando 1-12 de 59 artigos, teses e dissertações.
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1. Structure and dynamics of the protoplankton community in an environmentally protected urban stream
Resumo O objetivo foi investigar, em escalas espacial e temporal, a abundância das comunidades de protozoários bem como os fatores intervenientes na estruturação das mesmas em um córrego urbano. Métodos: Amostras de água para análise de comunidades biológicas (amebas testáceas, ciliados e bactérias) e para análise de variáveis limnológicas fora
Braz. J. Biol.. Publicado em: 02/12/2019
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2. Contribution of corn intercropped with Brachiaria species to nutrient cycling1
RESUMO A dinâmica de biomassa e nutrientes do milho pode ser alterada quando consorciado com Brachiaria (syn. Urochloa spp.). Objetivou-se investigar a dinâmica de biomassa, nitrogênio (N), fósforo (P) e potássio (K) para sistemas de produção de milho consorciado com espécies de Brachiaria. Campos experimentais foram conduzidos durante a safra e safr
Pesqui. Agropecu. Trop.. Publicado em: 26/09/2019
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3. Phosphorus dynamics in a highly polluted urban drainage channel-shallow reservoir system in the Brazilian semiarid
Abstract: This paper investigates phosphorus dynamics in a highly polluted system composed of a drainage channel followed by a shallow reservoir in the city of Fortaleza, Brazilian semiarid. During the dry season, significant non-point source loads of total phosphorus originated from residences unconnected to sewers were identified along the channel, resulti
An. Acad. Bras. Ciênc.. Publicado em: 19/08/2019
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4. Effects of the introduction of an omnivorous fish on the biodiversity and functioning of an upland Amazonian lake
RESUMO A introdução de espécies não nativas é uma ameaça aos ecossistemas de água doce. Embora a onivoria e a predação intraguilda sejam comuns nesses sistemas, os efeitos da introdução de peixes onívoros nas comunidades pelágicas e litorâneas é pouco conhecido. Nós testamos as previsões da teoria da teia trófica considerando os efeitos da
Acta Amaz.. Publicado em: 12/08/2019
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5. Serum proteinogram and biochemistry of Holstein cows in the peripartum period
RESUMO: Diante da escassez de relatos encontrados na literatura nacional quanto à potencial influência do número de parições sobre o proteinograma sérico e perfil bioquímico no período periparto de vacas leiteiras de alta produção, o objetivo do presente estudo foi avaliar comparativamente a dinâmica de constituintes séricos em amostras de sangue
Pesq. Vet. Bras.. Publicado em: 01/07/2019
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6. Trophic dynamics (Dissolved Inorganic Nitrogen-DIN and Dissolved Inorganic Phosphorus-DIP) in tropical urban estuarine systems during periods of high and low river discharge rates
Abstract: This paper focused on the use of the biogeochemical LOICZ (Land Ocean Interactions in the Coastal Zone) to investigate the dynamics of DIN and DIP nutrients among three highly urbanized tropical estuaries (Barra das Jangadas (BJ), Recife (RE) and Timbó (TB)), located in the northeastern region of Brazil. The input data were obtained through in sit
An. Acad. Bras. Ciênc.. Publicado em: 23/05/2019
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7. Phosphorus and thermotolerant coliforms’ loads in Brazilian watersheds with limited data: considerations on the integrated analysis of water quality and quantity
RESUMO Análises integradas dos aspectos qualitativos e quantitativos de ambientes aquáticos robustecem a tomada de decisão, que se vincula ao gerenciamento dos recursos hídricos e à promoção dos serviços ecossistêmicos. Contudo, as possíveis vantagens desta integração ainda esbarram em aspectos básicos, como elevadas incertezas devido ao monito
RBRH. Publicado em: 31/01/2019
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8. Morphological Diversity of Coleoptera (Arthropoda: Insecta) in Agriculture and Forest Systems
ABSTRACT Coleopterans (Coleoptera) are major ecosystem service providers. However ecomorphological features that are comparable in a wide range of invertebrates within this group and in various environments must be found, to be able to study regions with different species, contributing to overcome difficulties of the taxonomic approach and understand the fun
Rev. Bras. Ciênc. Solo. Publicado em: 09/11/2017
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9. Litterfall and Nutrient Dynamics in a Mature Atlantic Rainforest in Brazil
ABSTRACT We assessed litterfall and nutrient cycling in an old-growth Atlantic rainforest in southern Brazil. Plant litter collected monthly was separated into: leaves, twigs, reproductive organs, and fragments, and dried, weighed, and ground. Determination of carbon, nitrogen, phosphorus, potassium, calcium, magnesium, and sodium contents of different litte
Floresta Ambient.. Publicado em: 15/05/2017
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10. Decomposition Dynamics of Typha angustifolia under Aerobic Conditions
The study of the Typha species has gained attention in tropical areas due to their rapid growth, nutrient release, and contribution to detritus in lakes. Analysis of the degradation of Typha angustifolia has shown that the first stage of decomposition is marked primarily by the release of soluble compounds, indicating that microorganisms have a minor influen
J. Braz. Chem. Soc.. Publicado em: 2016-09
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11. Eichhornia azurea decomposition and the bacterial dynamic: an experimental research
Abstract Organic decomposition is a complex interaction between chemical, physical and biological processes, where the variety of aquatic vascular plants is essential for the trophic dynamics of freshwater ecosystems. The goal of this study was to determine the aquatic macrophyte Eichhornia azurea (Sw.) Kunth decomposition rate, the time relation with the li
Braz. J. Microbiol.. Publicado em: 2016-06
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12. Phosphorus Forms in Ultisol Submitted to Burning and Trituration of Vegetation in Eastern Amazon
ABSTRACT The use of fire to prepare agricultural areas is a technique still used by small farmers in eastern Amazon. This type of management changes the dynamics of soil nutrients, especially phosphorus, which constitutes the most limiting nutrient for crop production in tropical soils. This study was carried out to evaluate changes in phosphorus forms in an
Rev. Bras. Ciênc. Solo. Publicado em: 26/04/2016