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Global and local patterns in the use of macrophytes as substrata by hydroids (Hydrozoa: Anthoathecata and Leptothecata)
Patrão de Oliveira, O.M.; Marques, A.C. (2011). Global and local patterns in the use of macrophytes as substrata by hydroids (Hydrozoa: Anthoathecata and Leptothecata). Mar. Biol. Res. 7(8): 786-795
In: Marine Biology Research. Taylor & Francis: Oslo; Basingstoke. ISSN 1745-1000, more
Peer reviewed article  

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Keywords
    Algae; Biodiversity; Biogeography; Colonization; Commensalism; Hydrozoa [WoRMS]; Macrophyta; Brazil, Sao Paulo, Sao Sebastiao Channel; Marine

Authors  Top 
  • Patrão de Oliveira, O.M.
  • Marques, A.C.

Abstract
    Hydroids are one of the most important animal groups colonizing marine macrophytes. This study presents the diversity of hydroid species in plant substrate samples taken from three points of the São Sebastião Channel, southeastern Brazil. The selectivity level of each hydroid species was inferred from the number of its occurrences on each species of macrophyte. Red and brown algae, especially species belonging to the genera Galaxaura and Sargassum, respectively, presented the highest diversity index of epiphytic hydroids. The epiphytic hydroid fauna of São Sebastião Channel is mostly comprised of opportunistic species, presenting low substrate selectivity. A broader cluster analysis of the epiphytic hydroid fauna reported in several studies around the world suggests that hydroids are primarily related to their geographical distribution and may be secondarily related to the lineages of macrophytes.

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