Abstract
Epiphytic diatoms associated with three species of seaweeds, the phaeophyte Bachelotia antillarum, the ulvophyte Caulerpa verticillata, and the rhodophyte Haloplegma duperreyi, were investigated in the subtidal zone of Northeastern Brazil. A total of 54 diatom species were recorded, distributed among motile (24 species), erect (20 species), and adnate growth forms (five species), in addition to accidental occurrences (five species). Although motile diatoms showed the highest number of species, erect growth forms were the most abundant, accounting for 69% of the entire epiphytic diatom cell abundance. The total abundance ranged from 29,783 to 45,842 cells g-1 wet weight (ww), with Melosira moniliformis (erect), Rhabdonema adriaticum (erect), Cocconeis scutellum (adnate), and Surirella fastuosa (motile) as the most abundant species. The results confirmed qualitative and quantitative differences between the hosts with a greater shape diversity in B. antillarum whose thalli (filamentous-like tufts) offered an increased surface area for colonization mainly by epiphytic erect growth forms.
About the authors
Manoel Messias da Silva Costa obtained his PhD in Botany with an emphasis on benthic microalgae from the Universidade Federal Rural of Pernambuco (UFRPE) in 2015. His research covers topics in marine environments on diatoms epiphytic in seaweeds, sampling quantitative methods, diversity, taxonomy and ecology. Dr. Costa also works as a teacher and course coordinator of Biological Sciences, Faculdade São Vincente.
Sonia Maria Barreto Pereira obtained a PhD in Biological Sciences (Botany) from the Universidade de São Paulo (1978) and was a post doc at the Museum d’Histoire Naturelle, Paris (1982). Dr. Pereira has been a teacher at the Universidade Federal Rural de Pernambuco and a senior visiting teacher at the Universidade Federal de Pernambuco. Productivity Scholarship level 1 of Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Brasil. She is accredited by the Programa de Pós-Graduação em Botânica/UFRPE e Programa de Pós-Graduação em Saúde Humana e Meio Ambiente/UFPE. She has experience in the botany area acting mainly on the taxonomy and ecology of seaweeds (reef formations and mangroves) and the ecology of aquatic macrophytes continental environment.
Maria da Glória Gonçalves da Silva-Cunha has a PhD in Biological Oceanography from the Universidade Federal de Pernambuco (2001). She has experience in ecology, with an emphasis on phytoplankton ecology, acting on the following topics: monitoring, phytoplankton ecology, estuary, continental platform, oceanic region, biomass and marine microalgae.
Patrícia Campos de Arruda has a PhD in Botany from the Universidade Federal Rural de Pernambuco (2015). She has experience in botany, with an emphasis on Cyanobacteria, mainly: phytoplankton community, ecology and cyanobacteria taxonomy, aquatic ecosystems and reservoirs.
Enide Eskinazi-Leça has a PhD in Biological Sciences from the Universidade Federal de Pernambuco (UFRPE; 1976). Currently, she is an advisor to the Fundação de Apoio ao Desenvolvimento da Universidade Federal de Pernambuco/UFPE and a teacher of the Graduate Program in Botany of (UFRPE). She has experience in botany, with an emphasis on marine phytoplankton, diatoms, ecology and biodiversity.
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