Results 11 to 20 of about 137 (75)

Über Finnlands rezente und subfossile Diatomeen V [PDF]

open access: yesBulletin of the Geological Society of Finland, 1971
The article deals with the distribution and ecology of the Thalassionema, Asterionella, Amphicampa, Peronia, Eunotia and Actinella species known in ...
R. Tynni, K. Mölder
core   +2 more sources

Eunotiaceae Kützing (Bacillariophyceae) planctônicas do Sistema Lago dos Tigres, Britânia, GO, Brasil [PDF]

open access: yesHoehnea, 2012
Este trabalho objetivou inventariar as espécies da família Eunotiaceae Kützing ocorrentes no plâncton do sistema Lago dos Tigres (Britânia, GO-15º36'33,5"-15º22'8,7"S e 51º17'56,3"-51º16'91"W), composto por regiões lóticas e lênticas.
Bárbara Dunck Oliveira   +2 more
core   +4 more sources

Diatomáceas indicadoras de paleoambientes do Quaternário de Dois Irmãos, Recife, PE, Brasil Diatoms as indicators of paleoenvironments during the Quaternary at Dois Irmãos, Recife, Pernambuco State, Brazil

open access: yesActa Botânica Brasílica, 2007
O trabalho apresenta o levantamento da diatomoflórula identificada em sedimentos do Quaternário da Lagoa das Diatomáceas (Dois Irmãos, Recife), baseado em um testemunho de sondagem com 4,5 m, tendo sido analisadas amostras com intervalos de 10 em 10 cm ...
Giane Soares de Souza   +7 more
core   +2 more sources

Eunotiaceae (Bacillariophyceae) em igarapés da Amazônia Central, Manaus e Presidente Figueiredo, Brasil Eunotiaceae (Bacillariophyceae) from central Amazon rivers, Manaus and Presidente Figueiredo districts, Brasil [PDF]

open access: yesActa Amazonica, 2007
Estudos florísticos e taxonômicos envolvendo diatomáceas são escassos para a região amazônica. As publicações existentes incluem registros de diatomáceas da Amazônia brasileira, do Equador, da Colômbia e do Peru e comumente mostram que Eunotia e ...
Procopiak,Letícia Knechtel   +12 more
core   +3 more sources

Palaeolimnological assessment of lake acidification and environmental change in the Athabasca Oil Sands Region, Alberta [PDF]

open access: yesJournal of Limnology, 2010
Exploitation of the Athabasca Oil Sands has expanded hugely over the last 40 years. Regional emissions of oxidised sulphur and nitrogen compounds increased rapidly over this period and similar emissions have been linked to lake acidification in other ...
Sergi PLA   +15 more
core   +3 more sources

Actinella species (Bacillariophyta) from an Amazon black water floodplain lake (Amazonas - Brazil) Espécies de Actinella (Bacillariophyta) de um lago de inundação amazônico de águas pretas (Amazonas - Brasil)

open access: yesActa Amazonica, 2010
The genus Actinella Lewis was studied using planktonic samples from a black water floodplain lake in Central Amazon region. For species identification the taxa were morphological and morphometricaly analyzed on base in light microscope (LM) and scanning ...
Sérgio Melo   +2 more
doaj   +1 more source

EUNOTIACEAE KÜTZING (BACILLARIOPHYCEAE) EM CURSOS D’ÁGUA DE UMA REGIÃO DE CERRADO, CHAPADA DOS GUIMARÃES, MATO GROSSO – BRASIL [PDF]

open access: yes, 2021
Esse estudo teve como objetivo avaliar a composição taxonômica de Eunotiaceae Kützing em cursos d’água do Parque Nacional da Chapada dos Guimarães (PNCG) no Estado do Mato Grosso.
Pereira da Silva, Samiris   +2 more
core   +1 more source

(Vol. 08, 2005-12) Taxonomy of Hymenoxys Subgenus Rydbergia (Asteraceae: Helenieae: Tetraneurinae) [PDF]

open access: yes, 2005
Hymenoxys subg. Rydbergia comprises H. brandegeei, H. grandiflora, and H. insignis. The treatment includes a discussion of the original circumscription of the taxa, the description of the genus Rydbergia to accommodate H. brandegeei and H.
Bierner, Mark W.
core   +1 more source

Knowledge to ecological preferences in a tropical epiphytic algae to use with eutrophication indicators [PDF]

open access: yes, 2013
: In Ayapel floodplain periphyton associated to macrophyte roots on the basis of material was collected in fourteen samp- ling sites in nine moments of compilation.
Aguirre Ramírez, Néstor Jaime
core   +1 more source

Eunotiaceae (Bacillariophyta) no perifíton do reservatório de Curuá-Una, Santarém, Pará [PDF]

open access: yes, 2023
Eunotiaceae groups 12 genera, among them are Eunotia Ehrenberg, Actinella Lewis and Eunotioforma Kociolek & A.L.Burliga. Existing studies point to the predominance of the genus Eunotia in Amazonian waters, being well represented mainly in acidic ...
CAVALCANTE, Thainá Cruz
core  

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