Results 31 to 40 of about 576 (105)

Xanthophyceae planctônicas da planície de inundação do alto rio Paraná - DOI: 10.4025/actascibiolsci.v27i1.1353

open access: yesActa Scientiarum: Biological Sciences, 2008
Existem poucos estudos abordando a biodiversidade fitoplanctônica em ambientes aquáticos de planície de inundação, o que sugere a necessidade de estudos taxonômicos visando à conservação e recuperação desses ecossistemas.
Vânia Mara Bovo-Scomparim   +3 more
doaj   +1 more source

Diatom associations in shelf waters off Paraná State, Southern Brazil: annual variation in relation to environmental factors

open access: yesBrazilian Journal of Oceanography, 2004
The seasonal variation of diatoms in the inshore waters off Paraná State, Southern Brazil was investigated to analyse their temporal dynamics and to detect the main environmental constraints of the planktonic community. Biomass peaks occurred from May to
Luciano Felício Fernandes   +1 more
doaj   +1 more source

Análise da estrutura de comunidades fitoplanctônicas e de alguns fatores abióticos em trecho do Rio Jacuí, Rio Grande do Sul, Brasil Analysis of the structure of the phytoplanktonic communities and some abiotic factors on a stretch of the Jacuí River, Rio Grande do Sul, Brazil

open access: yesActa Botânica Brasílica, 1988
São apresentados os resultados do estudo do fitoplâncton e de algumas variáveis físicas e químicas da água em um trecho do Rio Jacuí, com base em amostragens realizadas em julho de 1986.
Zulanira Meyer Rosa   +3 more
doaj   +1 more source

Spectral mixture analysis for water quality assessment over the Amazon floodplain using Hyperion/EO-1 images

open access: yesRevista Ambiente & Água, 2007
Water composition undergoes complex spatial and temporal variations throughout the central Amazon floodplain. This study analyzed the spectral mixtures of the optically active substances (OASs) in water with spaceborne hyperspectral images. The test site
Lênio Soares Galvão   +2 more
doaj   +1 more source

Estrutura da comunidade de algas perifíticas em Eleocharis acutangula (Roxb.) Schult (Cyperaceae) em reservatório tropical raso, São Paulo, SP, Brasil

open access: yesHoehnea
O objetivo do presente estudo foi avaliar a influência da variação sazonal das condições ambientais sobre os atributos estruturais da comunidade de algas perifíticas em Eleocharis acutangula (Roxb.) Schult (Cyperaceae) na zona litorânea do Lago das ...
Vanessa Moraes Camargo, Carla Ferragut
doaj   +1 more source

Diversity and dominance in bird assemblages across habitats in the Ñeembucú wetlands complex

open access: yesBiotropica, Volume 56, Issue 5, September 2024.
We analyzed how the composition of neotropical bird assemblages vary among habitats (riparian forests, natural grasslands, savannas, and anthropized sites) in the Ñeembucú Wetlands Complex, the largest wetland system in Paraguay. We found a high bird richness (209 species) that contrasted with a pattern of dominance by a small set of 16 species that ...
Fátima Ortiz   +7 more
wiley   +1 more source

DENSIDADE PLANCTÔNICA DO POLICULTIVO DE Litopenaeus vannamei E Oreochromis niloticus

open access: yesCiência Animal Brasileira, 2017
Um experimento foi realizado durante 95 dias para avaliar as densidades planctônicas do policultivo do camarão branco Litopenaeus vannamei e da tilápia do Nilo Oreochromis niloticus.
Luis Otavio Brito   +4 more
doaj   +1 more source

Spatial and temporal dynamics of functional groups of phytoplankton in a tropical shallow lake

open access: yesActa Limnologica Brasiliensia, 2018
Aim To evaluate the structure and dynamics of functional phytoplankton groups (FGs) over a macrophyte cover gradient and their relations with environmental variable in small, shallow clear-water lake.
Núbia da Silva   +6 more
doaj   +1 more source

Caracterización del fitoplancton y estado trófico de la laguna Sauce Grande (provincia de Buenos Aires, Argentina) en el otoño de 2010

open access: yesBiología Acuática, 2019
La composición y la abundancia del fitoplancton en el lago Sauce Grande Shallow se estudiaron durante el otoño de 2010. Se establecieron tres sitios de muestreo: En la salida del río Sauce Grande (E1), a la entrada del río Sauce Grande en el cuerpo de ...
Nora Cristina Ferrer   +3 more
doaj  

Is it possible to evaluate the ecological status of a reservoir using the phytoplankton community?

open access: yesActa Limnologica Brasiliensia, 2018
Aim: The present study aims to evaluate the ecological status of the Broa reservoir through the application of the ecological index Evenness E2 on phytoplankton. Methods Phytoplankton samples from surface were obtained during the dry period (June/2015)
Aline Martins Vicentin   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy