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Répartition des épiphytes Pilayella littoralis (L.) Kjellm et Polysiphonia lanosa (L.) Tandy sur Ascophyllum nodosum (L.) Le Jol. en baie de Fundy (N.B., Canada) = Distribution of the epiphytes Pilayella littoralis and Polysiphonia lanosa on Ascophyllum nodosum in the Bay of Fundy
Cardinal, A.; Lesage, V. (1992). Répartition des épiphytes Pilayella littoralis (L.) Kjellm et Polysiphonia lanosa (L.) Tandy sur Ascophyllum nodosum (L.) Le Jol. en baie de Fundy (N.B., Canada) = Distribution of the epiphytes Pilayella littoralis and Polysiphonia lanosa on Ascophyllum nodosum in the Bay of Fundy. Cah. Biol. Mar. 33(1): 125-135
In: Cahiers de Biologie Marine. Station Biologique de Roscoff: Paris. ISSN 0007-9723, more
Peer reviewed article  

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Keyword
    Marine

Authors  Top 
  • Cardinal, A.
  • Lesage, V.

Abstract
    The abundance of Pilayella littoralis and Polysiphonia lanosa, two of the major epiphytes of the fucale Ascophyllum nodosum, was measured in May of three consecutive years, at two sites of different exposures in the Bay of Fundy (N.B. Canada). P. littoralis is absent on the host in the upper part of the littoral. P. lanosa has a similar abundance in the upper- and mid-littoral. P. littoralis is more abundant in the lower littoral and outgrows P. lanosa . P. lanosa is more abundant at the exposed site. P. littoralis grows more profusely on the terminal parts of A. nodosum, while the abundance of P. lanosa is similar on the median and terminal parts of its host. The following factors have been taken into account in the interpretation of the differences: light, nutrients availability, exposure, length of emersion periods and type of fixation on the host.

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