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  • Strong interactions of Paratya australiensis (Decapoda:Atyidae) on periphyton in an Australian subtropical stream

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    Author(s)
    Moulton, Timothy P
    Souza, Marcelo L
    Brito, Ernesto F
    Braga, M Rosario Almeida
    Bunn, Stuart E
    Griffith University Author(s)
    Bunn, Stuart E.
    Year published
    2012
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    Abstract
    Atyid shrimps are often an abundant component in undisturbed tropical streams. Studies in coastal streams in Puerto Rico and Brazil have demonstrated the importance of this group in removing periphyton and sediment from hard substrates and their effects on the composition and quantity of periphytic algae. We used experimental exclosures to investigate the influence of the small atyid Paratya australiensis on periphyton accrual on hard substrates in a coastal stream in the subtropics of Australia. We measured organic and inorganic matter, chlorophyll and algal biovolume in the presence and absence of shrimps on natural and ...
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    Atyid shrimps are often an abundant component in undisturbed tropical streams. Studies in coastal streams in Puerto Rico and Brazil have demonstrated the importance of this group in removing periphyton and sediment from hard substrates and their effects on the composition and quantity of periphytic algae. We used experimental exclosures to investigate the influence of the small atyid Paratya australiensis on periphyton accrual on hard substrates in a coastal stream in the subtropics of Australia. We measured organic and inorganic matter, chlorophyll and algal biovolume in the presence and absence of shrimps on natural and artificial substrates. We found a 5-fold increase in the amount of organic matter on natural substrate in the absence of P. australiensis and a two to 10-fold increase in total periphyton mass on artificial substrate. The natural substrates did not show differences in biovolume of algae, however, algal biovolume on the artificial substrates was significantly higher in the exclusion treatment and diatoms were most affected. We conclude that P. australiensis can be considered a strongly-interacting element of the stream biota and an important species for monitoring and conservation.
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    Journal Title
    Marine and Freshwater Research
    Volume
    63
    Issue
    9
    DOI
    https://doi.org/10.1071/MF12063
    Copyright Statement
    © 2012 CSIRO. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
    Subject
    Ecology not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/51124
    Collection
    • Journal articles

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