Phytoplankton
Mostrando 13-24 de 318 artigos, teses e dissertações.
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13. Limnology of shallow lakes of the semi-arid Central Pampa of Argentina
Resumo Objetivo No Pampa Central da Argentina, há três regiões fitogeográficas criadas pela diminuição da precipitação vinda do oeste. Essa região possui um grande número de lagos sendo a maioria desses temporários com hidroperíodos definidos por ciclos climáticos, embora alterados pela ação antrópica. Alguns desses lagos foram estudados co
Acta Limnol. Bras.. Publicado em: 18/02/2019
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14. Large-Scale Spatial and Temporal Variability of Larval Fish Assemblages in the Tropical Atlantic Ocean
Abstract This study investigated the large-scale spatial and temporal variability of larval fish assemblages in the west tropical Atlantic Ocean. The sampling was performed during four expeditions. Identification resulted in 100 taxa (64 families, 19 orders and 17 suborders). During the four periods, 80% of the total larvae taken represented eight characteri
An. Acad. Bras. Ciênc.. Publicado em: 14/02/2019
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15. Potential effects of mechanically removing macrophytes on the phytoplankton community of a subtropical reservoir
ABSTRACT Intensive growth of aquatic macrophytes interferes with water quality and ecosystem dynamics worldwide. Although mechanically removing macrophytes is the most commonly used method for their eradication, it can also cause undesirable disturbances in aquatic reservoir communities. We performed laboratory incubations of phytoplankton sampled before and
Acta Bot. Bras.. Publicado em: 02/07/2018
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16. Erratum: Structural changes of the phytoplankton and epiphyton in an urban hypereutrophic reservoir
Acta Limnol. Bras.. Publicado em: 14/05/2018
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17. Different silicon forms sinalize an input of urbanized river and indicate the presence of phytoplankton with silicon structures in the tropical coastal area of Recife (PE-Brazil)
Resumo As áreas urbanizadas marcam sua presença nos sistemas hidrológicos com alguns sinais biogeoquímicos, incluindo entradas de silício. A influência natural da lixiviação e erosão é feita por contribuição de silicato e, às vezes, o solo agrícola possui microfilóticos e contribui com sílica biogênica. Uma vez no sistema hidrológico, o sil
Braz. j. oceanogr.. Publicado em: 2018-03
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18. Assessing the spatial variation of functional diversity estimates based on dendrograms in phytoplankton communities
ABSTRACT Variation in phytoplankton functional diversity is partioned and mapped using several indices and linkage methods based on dendrograms. The relationships between diversity metrics and major environmental predictors, including zooplankton density, were assessed in 29 phytoplankton communities of floodplain lakes distributed along the Middle Araguaia
Acta Bot. Bras.. Publicado em: 21/09/2017
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19. Partitioning of the diffuse attenuation coefficient for photosynthetically available irradiance in a deep dendritic tropical lake
ABSTRACT We studied the effects of particulate and dissolved optically active components on the attenuation of photosynthetic active radiation (PAR) in a tropical lake. The temporal and spatial distribution of tripton, Chl-a and aCDOM(440) and their relative contribution to the diffuse PAR attenuation coefficient (Kd) was investigated at 21 sites (dry and we
An. Acad. Bras. Ciênc.. Publicado em: 2017-05
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20. Diversity of retrievable heterotrophic bacteria in Kongsfjorden, an Arctic fjord
Abstract The diversity and abundance of retrievable pelagic heterotrophic bacteria in Kongsfjorden, an Arctic fjord, was studied during the summer of 2011 (June, August, and September). Retrievable bacterial load ranged from 103 to 107 CFU L−1 in June, while it was 104-106 CFU L−1 in August and September. Based on 16S rRNA gene sequence similarities, a h
Braz. J. Microbiol.. Publicado em: 2017-03
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21. Influence of seasonal variation on the hydro-biogeochemical characteristics of two upland lakes in the Southeastern Amazon, Brazil
ABSTRACT Limnological characteristics of the Violão and Amendoim lakes, in the Serra dos Carajás, Amazon, were studied interannually (2013-2014). Climate data indicate anomalous conditions during the 2013 rainy period with higher rainfall and lower temperature in the beginning (November). Lake levels were influenced after the first and second hour of each
An. Acad. Bras. Ciênc.. Publicado em: 2016-12
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22. Structure and temporal variation of the phytoplankton of a macrotidal beach from the Amazon coastal zone
ABSTRACT The present study aimed to analyze the structure and the temporal variation of the phytoplankton of Ajuruteua beach (Bragança, Pará) and to investigate the influence of environmental variables on the dynamics of this community to provide a basis about the trophic state of this environment. Biological, hydrological and hydrodynamic samplings were p
An. Acad. Bras. Ciênc.. Publicado em: 2016-09
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23. Sugarcane and cancer, scientometrics, and phytoplankton dynamics of a beach in the Amazon
An. Acad. Bras. Ciênc.. Publicado em: 2016-09
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24. Short-term response of phytoplankton community to over-enrichment of nutrients in a well-preserved sub-tropical estuary
Braz. j. oceanogr.. Publicado em: 2016-06