Martin Haase

Learn More
The invasive land snail Theba pisana pisana has been widely dispersed through human activities. The Mediterranean and adjacent Atlantic coasts are considered as natural range of this species, which also occurs northwards to the Netherlands, the British Islands and in Ireland. In addition, T. p. pisana has been introduced to some Macaronesian Islands as well(More)
Genetic distances are increasingly being used for identification and species delimitation, especially since the introduction of "barcoding". While for phylogenetic inferences great care is generally taken to choose the best-fit evolutionary model, this is usually neglected in calculating genetic distances. Moreover, distances obtained from others than(More)
In Germany's D-Grid project numerous Grid communities are working together to develop a common overarching Grid. One major aim of D-Grid is thus to integrate the existing Grid deployments and make them interoperable. The major challenge in this endeavor lies in the heterogeneity of the current implementations: Three Grid middleware and different VO(More)
In theory, snails can come in two enantiomorphs: either dextral (coiling clockwise) or sinistral (coiling counterclockwise). In snail species where both forms are actually present, coiling direction is determined by a single gene with delayed maternal inheritance; there is no predictable relationship between a snail's own coiling genotype and its actual(More)
This study presents an approach for prosody-driven segmentation of speech data. The model is based solely on F ¼ contours and RMS envelopes. Phoneme or word information from a speech recognizer is un-neccesary. Using data from German broadcast news, we show how this prosodic information can be exploited to retrieve structural information of the spoken text.(More)
The circumscription of the avian superfamily Sylvioidea is a matter of long ongoing debate. While the overall inclusiveness has now been mostly agreed on and 20 families recognised, the phylogenetic relationships among the families are largely unknown. We here present a phylogenetic hypothesis for Sylvioidea based on one mitochondrial and six nuclear(More)
Island radiations have played a major role in shaping our current understanding of allopatric, sympatric and parapatric speciation. However, the fact that species divergence correlates with island size emphasizes the importance of geographic isolation (allopatry) in speciation. Based on molecular and morphological data, we investigated the diversification(More)
During the course of a project aiming at the reconstruction of the colonization of the South Pacific islands by tateid gastropods based on molecular data we discovered five new species on New Caledonia belonging to the genera Hemistomia and Leiorhagium, respectively. We describe these species based on morphological, anatomical and genetic data. All five(More)
Several pitfalls can mislead phylogenetic analyses based on molecular data, including heterogeneous base composition. Previous work has revealed conflicting topologies in analyses of the land snail genus Theba Risso 1826 based on mitochondrial cytochrome oxidase subunit I (COI) and nuclear AFLP data, respectively. However, the third codon positions of COI(More)