Grateloupia doryphora (Halymeniaceae, Rhodophyta) in Rhode Island waters (USA): geographical expansion, morphological variations and associated algae
| Autor: | Marilyn M. Harlin, Martine Villalard-Bohnsack |
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| Rok vydání: | 2001 |
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| Zdroj: | Phycologia. 40:372-380 |
| ISSN: | 2330-2968 0031-8884 |
| Popis: | Within a five-year period (1994–1999), the population of the invasive seaweed Grateloupia doryphora expanded from its initial location on a central, southern coastline in Rhode Island, USA. It spread north, east and west in Narragansett Bay, and south along the open coast of Rhode Island Sound. Large numbers of G. doryphora thalli were found in the lower intertidal (below + 0.2 m mean low water [MLW]), the subtidal (down to −5.5 m MLW), and tide pools (as high as +1.5 m MLW). Because the species has survived six winters and summers, it seems firmly established in Rhode Island. Regression analyses at nine stations on a latitudinal gradient indicate strong relationships between location in the bay and average maximum blade length (r = 0.91), width (r = 0.92), and polymorphism (r = 0.85). We also found significant differences in blade size and shape among the stations and in relation to depth. Near its exposed southern reaches, at its upper vertical limits, and in tide pools, this species was freque... |
| Databáze: | OpenAIRE |
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