Revision of the genus Dasya (Ceramiales, Rhodophyta) in Galicia (NW Spain) and the addition of a new alien species Dasya sessilis Yamada for the European Atlantic coasts
DOI:
https://doi.org/10.3989/ajbm.2006.v63.i1.27Keywords:
Alien species, Ceramiales, Dasya hutchinsiae, Dasya ocellata, Dasya sessilis, Dasyaceae, Galicia, Heterosiphonia japonica, Iberian Peninsula, RhodophytaAbstract
A revision of the genus Dasya in northwestern Iberian Peninsula is presented. Three species (Dasya hutchinsiae, D. ocellata and D. sessilis) are confirmed whilst other three (Dasya corymbifera, D. punicea and D. rigidula) are excluded from the Galician seaweeds flora. The alien species Dasya sessilis Yamada is a new record for the European Atlantic coasts. The study of the herbarium material reveals that D. sessilis was misidentified with other Dasyaceae species and that it has been collected on the Galician coasts for more than 16 years. Morphological and anatomical features of D. sessilis as well as its distribution and chronological data on the Galician coasts are provided. A comparison of the Iberian specimens with the Mediterranean and Asian plants is also included. Dasya sessilis was found growing on a wide range of substrata, from the lower intertidal to subtidal at moderate wave-exposed and sheltered areas. It is abundant in harbours and aquaculture areas together with other alien species such as Heterosiphonia japonica and Undaria pinnatifida. The comparative study between D. sessilis and similar European and Iberian Dasyaceae species is undertaken to prevent further misidentifications. Dasya sessilis is the largest Dasya species, with broader main axes (1-2 mm wide vs 200-500 µm in D. ocellata and 500-600 µm in D. hutchinsiae); pseudolaterals of D. sessilis are 3-5 times pseudodichotomously branched compared to 5-8 times in D. hutchinsiae and 4-5 times in D. ocellata; pseudolateral tips are broader in D. sessilis than in D. ocellata, but smaller than pseudolateral apices of D. hutchinsiae; tetrasporangial stichidium of Dasya sessilis has 6-7 periaxial cells (and 6-7 tetrasporangia) per fertile whorl vs. 4-5 in the rest of the native species; and tetrasporangial stichidia of D. sessilis are longer and cystocarps broader than those in D. hutchinsiae. The alien Dasyaceae species Heterosiphonia japonica, similar in size to Dasya sessilis, differs from it in main axes branching (alternate or distichous in H. japonica vs. spiral in D. sessilis), the number of periaxial cells in the vegetative axes (4 in H. japonica vs. 5 in D. sessilis), and color (pinkish red vs. deep red). Other distinctive characters are the tips of main axes (70-90 µm wide in H. japonica vs. 100-130 µm in D. sessilis), and the diameter of pseudolaterals at the base broader in H. japonica).
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References
Afonso-Carrillo, J. & Sansón, M. 1999. Algas, hongos y fanerógamas marinas de las Islas Canarias. Clave analítica. Universidad de La Laguna. La Laguna.
Ballantine, D.L. & Aponte, N.E. 2004. Dasya abbottiana sp. nov. (Dasyaceae, Rhodophyta) from Puerto Rico, Caribbean Sea. Cryptogamie Algologie 25(4): 409-417.
Bárbara, I., Cremades, J., Veiga, A.J. & López Rodríguez, M. C. 2003. Dasysiphonia sp. (Ceramiales, Dasyaceae) nuevo rodófito alóctono para la Península Ibérica. Anales del Jardín Botánico de Madrid 60(2): 440-443.
Bárbara, I., Cremades, J. & Veiga, A.J. 2004. Floristic study of a maërl and gravel subtidal bed in the “Ría de Arousa” (Galicia, Spain). Botanica Complutensis 28: 27-37.
Bárbara, I., Cremades, J., Calvo, S., López-Rodríguez, M.C. & Dosil, J. 2005. Checklist of the benthic marine and brackish Galician algae (NW Spain). Anales del Jardín Botánico de Madrid 62(1): 69-100.
Bjærke, M.R. & Rueness, J. 2004. Effects of temperature and salinity on growth, reproduction and survival in the introduced red alga Heterosiphonia japonica (Ceramiales, Rhodophyta). Botanica Marina 47(5): 373-380. doi:10.1515/BOT.2004.055
Choi, H-G. 2001. Morphology and reproduction of Heterosiphonia pulchra and H. japonica (Ceramiales, Rhodophyta). Algae 16(4): 387-409.
De Jong, Y. 1997. Studies on Dasyaceae. 1. Reproductive structures of Eupogodon planus and E. spinellus (Ceramiales, Rhodophyta) from Corsica (Mediterranean). Phycologia 36(4): 281-292.
Dixon, P.S. & Irvine, L.M. 1970. Miscellaneous notes on algal taxonomy and nomenclature III. Botaniska Notiser 123: 474-487.
Donze, M. 1968. The algal vegetation of the Ría de Arosa (NW. Spain). Blumea 16: 159-192.
Fredericq, S. & Norris, J.N. 1986. The structure and reproduction of Dasya haitiana sp. nov. (Dasyaceae, Rhodophyta) from the Caribbean Sea. Phycologia 25(2): 185-196.
Lein, T.E. 1999. A newly immigrated red alga (“Dasysiphonia”, Dasyaceae, Rhodophyta) to the Norwegian coast. Sarsia 84: 85- 88.
Maggs, C.A. 1998. Life history variation in Dasya ocellata (Dasyaceae, Rhodophyta). Phycologia 37(2): 100-105.
Maggs, C.A. & Hommersand, M.H. 1993. Seaweeds of the British Isles, Volume 1 Rhodophyta Part 3A Ceramiales. The Natural History Museum. London.
Otero-Schmitt, J. 1993. Estudio de las fitocenosis bentónicas litorales en el tramo de costa comprendido entre Pta. Louro y Pta. Remedios (La Coruña–España). PhD Thesis. Universidad de Santiago de Compostela. Santiago de Compostela.
Peña, V. & Bárbara, I. 2002. [2003] Caracterización florística y zonación de las algas bentónicas marinas del puerto de A Coruña (N.O. Península Ibérica). Nova Acta Científica Compostelana 12: 35-66.
Schlech, K.E. & Abbott, I.A. 1989. Species of Dasyaceae (Rhodophyta) from Hawaii. Pacific Science 43(3): 332-351.
Schneider, C.W. & Searles, R.B. 1991. Seaweeds of the Southeastern United States. Cape Hatteras to Cape Canaveral. Duke University Press. Durham.
Seoane-Camba, J. 1957. Algas superiores de las rías bajas gallegas. Investigación Pesquera 8: 15-28.
Stegenga, H. 1997. Een nieuve Japanse invasie-vooral een systematich probleem. Het Zeepard 57(5): 109-113.
Taylor, W.R. 1979. Marine algae of the eastern tropical and subtropical coasts of the Americas. The University of Michigan Press. Ann Arbor.
Veiga, A.J., Cremades, J. & Bárbara, I. 1998. Fragmenta Chorologica Occidentalia, Algae, 6283-6307. Anales del Jardín Botánico de Madrid 56(1): 121-123.
Verlaque, M. 2002. Morphology and reproduction of Dasya sessilis (Ceramiales, Rhodophyta), an introduced Asian species thriving in Thau Lagoon (France, Mediterranean Sea). Phycologia 41(6): 612-618.
Yamada, Y. 1928. Report of the biological survey of Mutsu Bay. 9. Marine algae of Mutsu Bay and adjacent waters.II. Scientific reports of Tohoku Imperial University 4(3): 497-534.
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