Schaefer, Matthias

[["dc.bibliographiccitation.artnumber","A8"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","527"],["dc.contributor.author","Southworth, John"],["dc.contributor.author","Dominik, M."],["dc.contributor.author","Jorgensen, U. G."],["dc.contributor.author","Rahvar, S."],["dc.contributor.author","Snodgrass, Colin"],["dc.contributor.author","Alsubai, K. A."],["dc.contributor.author","Bozza, V."],["dc.contributor.author","Browne, P."],["dc.contributor.author","Burgdorf, M. J."],["dc.contributor.author","Novati, S. Calchi"],["dc.contributor.author","Dodds, Peter N."],["dc.contributor.author","Dreizler, Stefan"],["dc.contributor.author","Finet, F."],["dc.contributor.author","Gerner, T."],["dc.contributor.author","Hardis, S."],["dc.contributor.author","Harpsoe, K. B. W."],["dc.contributor.author","Hellier, C."],["dc.contributor.author","Hinse, Tobias C."],["dc.contributor.author","Hundertmark, Markus"],["dc.contributor.author","Kains, N."],["dc.contributor.author","Kerins, E."],["dc.contributor.author","Liebig, C."],["dc.contributor.author","Mancini, L."],["dc.contributor.author","Mathiasen, M."],["dc.contributor.author","Penny, M. T."],["dc.contributor.author","Proft, S."],["dc.contributor.author","Ricci, D."],["dc.contributor.author","Sahu, K. C."],["dc.contributor.author","Scarpetta, G."],["dc.contributor.author","Schaefer, S."],["dc.contributor.author","Schoenebeck, F."],["dc.contributor.author","Surdej, J."],["dc.date.accessioned","2018-11-07T08:59:00Z"],["dc.date.available","2018-11-07T08:59:00Z"],["dc.date.issued","2011"],["dc.description.abstract","We present the first high-precision photometry of the transiting extrasolar planetary system WASP-7, obtained using telescope defocussing techniques and reaching a scatter of 0.68 mmag per point. We find that the transit depth is greater and that the host star is more evolved than previously thought. The planet has a significantly larger radius (1.330 +/- 0.093 R(Jup) versus 0.915(-0.040)(+0.046) R(Jup)) and much lower density (0.41 +/- 0.10 rho(Jup) versus 1.26(-0.21)(+0.25) rho(Jup)) and surface gravity (13.4 +/- 2.6 ms(-2) versus 26.4(-4.0)(+4.4) ms(-2)) than previous measurements showed. Based on the revised properties it is no longer an outlier in planetary mass-radius and period-gravity diagrams. We also obtain a more precise transit ephemeris for the WASP-7 system."],["dc.identifier.doi","10.1051/0004-6361/201016183"],["dc.identifier.fs","590497"],["dc.identifier.isi","000287484100023"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/8600"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/23783"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Edp Sciences S A"],["dc.relation.issn","0004-6361"],["dc.relation.orgunit","Fakultät für Physik"],["dc.title","A much lower density for the transiting extrasolar planet WASP-7"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","811"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Journal of Insect Conservation"],["dc.bibliographiccitation.lastpage","822"],["dc.bibliographiccitation.volume","15"],["dc.contributor.author","Schuch, Sebastian"],["dc.contributor.author","Bock, Julian"],["dc.contributor.author","Leuschner, Christoph"],["dc.contributor.author","Schaefer, Matthias"],["dc.contributor.author","Wesche, Karsten"],["dc.date.accessioned","2018-11-07T08:49:36Z"],["dc.date.available","2018-11-07T08:49:36Z"],["dc.date.issued","2011"],["dc.description.abstract","During the past 50 years development of farming practices caused tremendous changes in European agricultural landscapes and many insect species became increasingly restricted to protected areas. Yet little is known about long-term trends of insect diversity and community composition in these often small reserves. We performed a comparative study on changes in orthopteran communities of protected dry grasslands in East Germany, which had been surveyed in the 1960s. Applying the same sampling techniques, we revisited 26 of the original sites in 2008 and 2009. Nearly all sites are controlled by conservation policies and changes in vegetation composition were relatively small, although some sites showed shrub encroachment. Changes in orthopteran diversity were not significant. Community composition showed minor changes which were correlated with evidence of woody plant encroachment as derived from historical and recent aerial imagery. The frequency of some Caelifera species decreased from the 1960s to 2008/2009 with one species inhabiting bare soils (Myrmeleotettix maculatus) showing the strongest decline. Some Ensifera, especially two species inhabiting open woodland and scrub (Tettigonia viridissima, Phaneroptera falcata) showed positive trends. Nevertheless, three different regions (each belonging to a different German federal state) had shown distinct orthopteran assemblages in the 1960s, and these were equally different 40 years later. We conclude that the orthopteran fauna of Central European protected dry grasslands showed small changes in species composition, and overall diversity remained rather constant during the past 40 years, which is in accordance with the minor changes in the surrounding landscape. Consequently, the applied conservation management practises-mainly sheep grazing and trimming-are largely effective."],["dc.identifier.doi","10.1007/s10841-011-9379-6"],["dc.identifier.isi","000296881600006"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/7165"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/21498"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","1366-638X"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Minor changes in orthopteran assemblages of Central European protected dry grasslands during the last 40 years"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1267"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Biodiversity and Conservation"],["dc.bibliographiccitation.lastpage","1284"],["dc.bibliographiccitation.volume","17"],["dc.contributor.author","Schuldt, Andreas"],["dc.contributor.author","Fahrenholz, Nadine"],["dc.contributor.author","Brauns, Mascha"],["dc.contributor.author","Migge-Kleian, Sonja"],["dc.contributor.author","Platner, Christian"],["dc.contributor.author","Schaefer, Matthias"],["dc.date.accessioned","2018-11-07T11:15:20Z"],["dc.date.available","2018-11-07T11:15:20Z"],["dc.date.issued","2008"],["dc.description.abstract","The relationships between species diversity and ecosystem functions are in the focus of recent ecological research. However, until now the influence of species diversity on ecosystem processes such as decomposition or mineral cycling is not well understood. In deciduous forests, spiders are an integral part of the forest floor food web. In the present study, patterns of spider diversity and community structure are related to diversity of deciduous forest stands in the Hainich National Park (Thuringia). In 2005, pitfall trapping and quantitative forest floor sampling were conducted in nine plots of forest stands with one (Diversity Level 1), three (DL 2) and five (DL 3) major deciduous tree species. Species richness, measured with both methods, as well as spider abundance in forest floor samples were highest in stands with medium diversity (DL 2) and lowest in pure beech stands (DL 1). The Shannon-Wiener index and spider numbers in pitfall traps decreased from DL 1 to DL 3, while the Shannon-Wiener index in forest floor samples increased in the opposite direction. Spider community composition differed more strongly between single plots than between diversity levels. Altogether, no general relationship between increasing tree species diversity and patterns of diversity and abundance in spider communities was found. It appears that there is a strong influence of single tree species dominating a forest stand and modifying structural habitat characteristics such as litter depth and herb cover which are important for ground-living spiders."],["dc.identifier.doi","10.1007/s10531-008-9330-7"],["dc.identifier.isi","000255998100019"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/6793"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/54344"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0960-3115"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Communities of ground-living spiders in deciduous forests: Does tree species diversity matter?"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]