Meeresalgen von Helgoland: Ergänzung

Abstract

Marine algae of Helgoland: Supplementation. Complementary to a previous publication (Kornmann & Sahling, 1977), this investigation deals mainly with microscopic algae occurring in the rocky littoral of Helgoland island (North Sea). Based on the results obtained from cultivation experiments, the heterogeneous Ulvella-complex of Dangeard has been rearranged and partly included in a new genus Stromatella, and Planophila respectively. The life history of Chlorocystis cohnii proved to be heteromorphic, the zygotes developing into a Codiolum-sporophyte. Also in Halochlorococcum marinum, some of the biflagellate swarmers give rise to Codiolum-like cells. Chlorocystis and Halochlorococcum, up to now members of the Chlorococcales, are incorporated into the new Codiolophycean order, Chlorocystidales. Three new Halochlorococcum species are described, the epiphytic "'Chlorochytrium'" moore/ also being combined with this genus. Supplementary observations on some crustose red algae from transparent substrates are included in this study, as well as findings of some species not previously reported for the Helgoland area. EINLEITUNGDie vorliegende Erg~inzung der "Meeresalgen von Helgoland" ist anderer Art als der 1977 erschienene Teil, in dem haupts~chlich die makroskopischen Algen dargestellt sind. Das Buch sollte in erster Linie den Teilnehmern an meeresbiologischen Kursen als Orientiemngshilfe dienen, die Erg~nzung wendet sich haupts~chlich an den fachlich interessierten Leser. Die meisten der hier behandelten Formen sind epi-oder endophytisch lebende sowie aus Kulturen mit bewachsenem Substrat -Steinen, Muschetschalen oder Glasscherben -isoIierte GrO_nalgen. Dabei wttrden mehrere Arten wiedergefunden, die Dangeard (1965a-d) mit ~hnlicher Methodik entdeckt und beschrieben hatte. Wahrscheinlich sind diese bisher nur von den franz6sischen Kiisten bekanntgewordenen Kleinalgen in europ~ischen Gew~ssern welt verbreitet.Nach Form und Inhalt k6nnen auch drei Arbeiten als Erg~nzungen zur Algenflora von Helgoland gelten, die inzwischen erschienen sind. Die. Gattung Blidingia wurde ausfiihrlich bearbeitet (Korninann & Sahling, 1978). Scinaia und Helminthocladia, seit vielen Jahrzehnten nicht mehr am Standoff gefunden, sind als kalkbohrende Mikrothalli vorhanden und wurden aus diesen kultiviert (Kornmann & Sahling, 1980a).Ostreobium quekettii, eine kalkbohrende Grfinalge, vermehrt sich mit ungeschlechtlichen Zoosporen zu gleichartigen Generationen (Kommann & Sahling, 1980b).

Morphological variation ofStromatella monostromatica

“…In the isolates referred to group A (Table 1), attached plants were morphologically similar to the plants described by Dangeard (1965) and those dealt with by Kornmann & Sahling (1983). Unattached plants, similar to the one depicted by Kornmann & Sahling (1983), were also observed.…”

“…The species was later studied by Kornmann & Sahhng (1983) who concluded that the development of young plants, together with the organization of older thalli, justified a separation from Ulvella into a new genus, Stromatella, with S. monostromatica as the type species. Another species of Ulvefla was simultaneously transferred to Stromatella as S. papillosa (Dangeard) Kornmann & Sahling. Kornmann & Sahling (1983) mentioned that the characteristic monostromatic morphology of S. monostromatica developed only when the plants grew in close contact with a firm substratum, and showed a ,,loose" plant with a different morphology (Kornmann & Sahling, 1983, Fig.…”

Toward a monograph of non-marine Ulvophyceae using an integrative approach (Molecular phylogeny and systematics of terrestrial Ulvophyceae II.)

“…Broady (1982) isolated two strains of Planophila A and B from Iceland and Antarctica, respectively. Dangeard (1965) described a new species Ulvella microcystoides, which was later transferred to Planophila by Kornmann & Sahling (1983). Friedl & O'Kelly (2002) revised the genus Planophila based on SSU phylogeny and TEM.…”

Lista de Ulvophyceae do estado de São Paulo

“…Para estes representantes microscópicos, a cultura em laboratório mostrou ser boa ferramenta para elucidar a ontogenia e morfologia do talo, assim como os seus históricos de vida (Kornmann & Sahling 1983, O'Kelly & Floyd 1983. Tanto que a identificação de Stromatella monostromatica (Barata & Fujii 2006, Coto 2007) só foi possível a partir de desenvolvimentos em cultura.…”