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| Ferragut,Carla; Bicudo,Denise de Campos. |
| Substrato difusor de nutrientes (SDN) foi utilizado para determinar o efeito da adição de fósforo sobre o desenvolvimento do perifíton em uma represa rasa (Lago do IAG, PEFI, São Paulo). Três tratamentos (n = 2) foram delineados: controle (sem adição de fósforo) e dois com adição de fósforo (P1 = 0,1 M e P2 = 0,5 M KH2PO4). A superfície dos SDN foi revestida com malha de 20 µm para crescimento do perifíton. Coletas foram realizadas nos 15º, 20º, 25º e 30º dias de colonização. A acumulação de biomassa (massa orgânica, clorofila-a, biovolume total de algas) e de densidade total de algas não forneceu resposta significativa ao enriquecimento. Seis espécies de clorofíceas e uma de diatomáceas associaram-se à disponibilidade de fósforo. O estado nutricional do... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Algas; Descritores ambientais; Fósforo; Perifíton; Reservatório. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042009000300015 |
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| Faustino,Samantha Borges; Fontana,Luciane; Bartozek,Elaine Cristina Rodrigues; Bicudo,Carlos Eduardo de Mattos; Bicudo,Denise de Campos. |
| Fresh water biodiversity is an increasing concern due to growing human impact. Herein, we report a long-term survey (ca. 90 years) of sedimentary diatoms and the modern flora from surface sediments and their biodiversity changes along a eutrophication gradient. Study was carried out in one of the most important water supply reservoirs (Guarapiranga Reservoir) of São Paulo Metropolitan Region, Brazil. Results are based on 75 core subsamples (subfossil assemblages from core) previously dated by 210Pb and 14 samples from surface sediments (modern assemblages). Overall, 84 taxa were reported, belonging to 30 genera, 71 species and eight non-typical varieties, besides five probable new taxa. Results expanded two new additions for the Brazilian diatom flora... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacillariophyta; Biodiversity change; Eutrophication; Guarapiranga Reservoir; Paleolimnology; Species richness. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032016000200203 |
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| Taniguchi,Glória Massae; Bicudo,Denise de Campos; Sennab,Pedro Américo Cabral. |
| The present study aimed to analyse the abiotic characteristics spatial variability in the littoral-limnetic gradient of the Diogo Pond, Mogi-Guaçu River floodplain, as well as evaluating the hydrological influence on the spatial gradient. During the hydrological cycle, four field trips (high water, flood, low water, and drought) were carried out at three sampling stations: littoral, interface, and limnetic region. Analysis of physical and chemical variables allowed to conclude that the time scale established by the hydrological cycle was the main forcing function over the limnological variability of the Diogo Pond. The relative spatial scale related to littoral-limnetic gradient contributed secondarily to the abiotic variability. Littoral was characterized... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oxbow lake; Littoral-limnetic gradient; Physical and chemical features. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000600016 |
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