13 research outputs found

    Neue linguistische Methoden und arbeitstechnische Verfahren in der Erschliessung der Àgyptischen Grammatik

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    15 pĂĄginas, 1 tabla, 6 figuras.Does diversity beget diversity? Diversity includes a diversity of concepts because it is linked to variability in and of life and can be applied to multiple levels. The connections between multiple levels of diversity are poorly understood. Here, we investigated the relationships between genetic, bacterial, and chemical diversity of the endangered Atlanto-Mediterranean sponge Spongia lamella. These levels of diversity are intrinsically related to sponge evolution and could have strong conservation implications. We used microsatellite markers, denaturing gel gradient electrophoresis and quantitative polymerase chain reaction, and high performance liquid chromatography to quantify genetic, bacterial, and chemical diversity of nine sponge populations. We then used correlations to test whether these diversity levels covaried. We found that sponge populations differed signiïŹcantly in genetic, bacterial, and chemical diversity. We also found a strong geographic pattern of increasing genetic, bacterial, and chemical dissimilarity with increasing geographic distance between populations. However, we failed to detect signiïŹcant correlations between the three levels of diversity investigated in our study. Our results suggest that diversity fails to beget diversity within a single species and indicates that a diversity of factors regulates a diversity of diversities, which highlights the complex nature of the mechanisms behind diversityResearch funded by grants from the Agence Nationale de la Recherche (ECIMAR), from the Spanish Ministry of Science and Technology SOLID (CTM2010-17755) and Benthomics (CTM2010-22218-C02-01) and the BIOCAPITAL project (MRTN-CT-2004-512301) of the European Union. This is a contribution of the Consolidated Research Group ‘‘Grupo de EcologıŽa BentoÂŽnica,’’ SGR2009-655.Peer reviewe

    Hemiasterella aristoteliana n.sp. (Porifera: Hadromerida) from the Aegean Sea with a discussion of the family Hemiasterellidae

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    A representative of the genus Hemiasterella Carter, 1879 was found for the first time in the Mediterranean Sea during sampling in the shallow waters of the northern Aegean Sea. The new species, H. aristoteliana, is compared with Atlantic Hemiasterella elongata Topsent, 1928. The status of the family Hemiasterellidae is discussed

    Suberitidae (Demospongiae, Hadromerida) from the North Aegean Sea.

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    Sampling in the North Aegean Sea yielded nine species of the family Suberitidae, four of which, Pseudosuberites sulphureus, P. hyalinus, Suberiles ficus and S. syringella, are new for the fauna of the Eastern Mediterranean, and three more, S. carnosus, S. domuncula, and S. massa, are new records for the fauna of the Aegean Sea. For each of the nine species comments on the systematics, as well as geographical and ecological information is given. A redescription is given of the little known species Suberites massa Nardo. A review of the distribution of all Mediterranean Suberitidae is also presented, in which it is concluded that a further three species not represented in our material have been reported from the Eastern Mediterranean, viz. Laxosuberites ectyoninus, Prosuberites longispina, and P. epiphytum. Six suberitids reported from other parts of the Mediterranean so far have not been found in the Eastern Mediterranean
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