Fróðskaparrit - 01.01.2001, Side 21

Fróðskaparrit - 01.01.2001, Side 21
The Bangiophyte Species of the Faroe Islands Reyðtarar av bólkinum Bangiophycidae í føroyskum øki. 25 Juliet Brodie1, Ruth Nielsen2 and Karl Gunnarsson3 1: Bath Spa University College, Newton Park, Newton St. Loe, Bath BA2 9BN, UK. Phone: + 44 (0)1225875435, Fax: + 44(0)1225875776, E-mail: j.brodie@bathspa.ac.uk 2: Botanical Museum & Library, Gothersgade 130, DK-1123 Copenhagen K, Denmark. Phone: + 45 35322185, Fax: +45 35322186, E-mail: ruthn@bot.ku.dk 3: Marine Research Institute, Skúlagota 4, 101 Reykjavik, Iceland. Phone: + 354 5520240, Fax: +354 5623790, E-mail: karl@hafro.is Úrtak Víðfevnandi innsavningar av algum í Føroyum hava avdúkað hesi sløg av reyðalgum, sum hoyra til flokkin Bangiophycidae: Bangia atropurpurea, Erythrocladia irregularis, Erythrotrichia bertholdii, E. carnea, Por- phyropsis coccinea, Sahlingia subintegra, Porphyra amplissima, P. dioica, P. leucosticta, P. linearis, P. miniata, P. purpurea, P. umbilicalis og minst trý sløg, sum helst ikki enn hava fingið navn. Skilnaður millum slektimar Porphyra og Bangia sæst best á blaðskapi, liti á turkaðum herbariueintøkum og bygnaði av nørings- gøgnum. Hini sløgini kunnu bert navngreinast við kann- ing í sjóneyku. Urslitini av hesari kanning verða saman- borin við úrslitini frá øðrum nýligum kanningum av hes- um Porphyra algum í Bretsku Oyggjunum, har tey somu sløgini finnast uttan P. miniata. Abstract A study of the bangiophyte species (i.e. those belonging to the subclass of red algae the Bangiophycidae), based on extensive collections from the Faroe Islands, has re- vealeđ the following species: Bangia atropurpurea, Erythrocladia irregularis, Erythrotrichia bertholdii, E. carnea, Porphyropsis coccinea, Sahlingia subintegra, Porphyra amplissima, P. dioica, P. leucosticta, P. lin- earis, P. miniata, P. purpurea, P. umbilicalis and at least three possibly undescribed species. Porphyra and Bangia species can be distinguished on the basis of shape of frond, colour of dried herbarium specimens and the nature of the reproductive structures. The other species require microscopic examination to be identi- fied. The Porphyra data are discussed in relation to the recently studied British Isles bangiophyte flora which is similar but lacks P. miniata. Introduction Between 1994 and 1997 extensive collec- tions were made of the marine algae and fauna in shallow water around the Faroe Is- lands as part of the BIOFAR project, the aim of which was to produce an inventory of all the plant and animal species present. This paper deals specifically with species of red algae collected that are currently as- signed to the subclass Bangiophycidae (bangiophytes). These are dealt with se- parately from other red algae, the Florideo- phycidae. Two genera of bangiophytes, Bangia and Porphyra, have species that are notoriously difficult to identify because of the lack of obvious morphological charac- ters. The basic life history was originally elu- cidated by Drew (1949; 1954), who showed it to be heteromorphic, and consisting of Fróðskaparrit 49. bók 2001: 25-36
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