Naslov
Remarks on spongillid sponge species in Lake Constance, Germany

Autori
Pfannkuchen, Martin ; Bruemmer, Franz ; Schlesinger Sabine ; Fritz, Gisela ; Meixner, Martin

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
7th international sponge symposium. Biodiversity Innovation Sustainability / Custodio, Marcio Reis ; Lobo-Hajdu, Gisele ; Hajdu, Eduardo ; Muricy, Guilherme - Rio de Janeiro : Rio de Janeiro Museu Nacional, 2006, 229-229

ISBN
85-7427-012-1

Skup
7th international sponge symposium. Biodiversity Innovation Sustainability

Mjesto i datum
Rio de Janeiro, Brazil, 07.03.2006. - 13.03.2006

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
sponges; freshwater; spongillidae; Ephydatia; lake constance

Sažetak
Sponges of the family Spongillidae are found around the world in the most different habitats and thus are said to be cosmopolitical species. We investigate two populations of freshwater sponges that at first glance inhabit the very same habitat, a drop off in Lake Constance, Germany. By this example we will demonstrate today`s difficulties in taxonomic work on spongillid sponges and possible outcomes. The upper population built of Spongilla lacustris covers the sandstone drop off from 7 to 14 m water depth ; this species is easy to determine by established taxonomic characters. Beneath 14 m water depth we find a dense population of Ephydatia sp. growing on a dense cover of Dreissena polymorpha. The most intriguing feature of this observation is that both populations are directly adjacent to each other but not overlapping. A very strict borderline is formed at 14 m water depth. There is a strict correlation for the lower population to the presence of Dreissena polymorpha which acts as edificator organism in the observed consortium. As the lower population is built up by a non gemmulating Ephydatia species, macroscopic morphological features as well as molecular data have to be taken into account for the taxonomic description. We, therefore investigated 28S, 18S, ITS and COI Sequences as well as additional morphological and histological characters like canal system and growth form. The combination of the markers we investigated gives a clear hint for the classification as Ephydatia fluviatilis. Our approach is using ecological, morphological and molecular data sets as a synthesis of all available data on the species, thus enables us to uncover it’s taxonomic relationships.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

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