TY - CHAP A1 - Nixdorf, Brigitte A1 - Becker, Katja A1 - Grüneberg, Björn A1 - Böllmann, Jörg A1 - Martienssen, Marion T1 - Stickstoffumsätze in unterschiedlichen Gewässertypen Berlin/Brandenburgs, Teil 2: Erste Ergebnisse zu einträgen und Umsätzen T2 - Erweiterte Zusammenfassungen der Jahrestagung 2011 der Deutschen Gesellschaft für Limnologie (DGL) und der deutschen und österreichischen Sektion der Societas Internationalis Limnologiae (SIL), Weihenstephan, 12. - 16. Sept. 2011 Y1 - 2012 SN - 978-3-9813095-2-2 SP - 239 EP - 244 PB - Eigenverl. der DGL CY - Hardegsen ER - TY - CHAP A1 - Böllmann, Jörg A1 - Martienssen, Marion A1 - Grüneberg, Björn T1 - Vergleich der mikrobiellen Nitratreduktion in Sediment und Pelagial eines eutrophen Flusssees und eines mesotrophen geschichteten Sees T2 - Erweiterte Zusammenfassungen der Jahrestagungder Deutschen Gesellschaft für Limnologie (DGL), Potsdam - Berlin, 09. - 13. September 2013 KW - Nitratreduktion Y1 - 2014 SN - 978-3-9813095-5-3 SP - 35 EP - 39 PB - Hardegsen CY - Eigenverlag der DGL ER - TY - CHAP A1 - Böllmann, Jörg A1 - Martienssen, Marion A1 - Nixdorf, Brigitte T1 - Stickstoffumsätze in unterschiedlichen Gewässertypen Berlin/Brandenburgs, Teil 1: Zellzahlen von Nitrifikanten und Denitrifikanten T2 - Erweiterte Zusammenfassung der Jahrestagung der DGL 2011 in Weihenstephan KW - Nitrifikation KW - Stoffumsätze Y1 - 2012 SN - 978-3-9813095-2-2 SP - 234 EP - 238 PB - Eigenverlag der DGL CY - Hardegsen ER - TY - CHAP A1 - Böllmann, Jörg A1 - Scholler, Markus T1 - Preliminary studies on the spread of the rust fungus Puccinia glechomatis in North America T2 - Joint Meeting of the American Phytopathological Society, the Mycological Society of America, and the Society of Nematologists, Salt Lake City, Utah, USA, August 25-29, 2001 Y1 - 2001 N1 - Phytopathology 21(2001)6 SP - S. 104 ER - TY - CHAP A1 - Böllmann, Jörg A1 - Scholler, Markus T1 - The Life Cycle of Puccinia glechomatis, a microcyclic rust on Glechoma hederacea T2 - 2002 MSA Annual Meeting Corvallis, OREGON Y1 - 2002 UR - http://msafungi.org/wp-content/uploads/Inoculum/53%283%29.pdf N1 - Inoculum : newsletter of the Mycological Society of America 53(2002)3 SP - S. 21 ER - TY - GEN A1 - Rathsack, Kristina A1 - Böllmann, Jörg A1 - Martienssen, Marion T1 - Comparative Study of Different Methods for Analyzing Denitrifying Bacteria in Fresh Water Ecosystems T2 - Journal of Water Resource and Protection N2 - Bacteria capable of denitrification play a significant role in the nitrogen cycle of freshwater ecosystems. By metabolizing nitrogen compounds they e.g. counteract the eutrophication of natural waters. To get detailed insights into the in situ turnover rates of nitrogen a reliable tool of quantification for active microorganisms is essential. In the present investigation, quantification capabilities of a molecular tool (Polymerase Chain Reaction—PCR) and a cultivation based tool (Most probable number—MPN) were investigated and compared. The total bacterial concentration yielded by the molecular PCR approach was up to 6-fold higher compared to the results of the MPN approach. However, the portion of culturable denitrifying bacteria compared to the number of specific gene copies (nirS) was much lower. Depending on the environmental conditions, the difference between the PCR and the MPN approach was up to three orders of magnitude. From lab scale experiments with a pure P. aeroginosa strain it can be concludes, that these differences are not the result of inappropriate culture conditions but rather reflect the portion of so called viable but not culturable bacteria (VBNC). Low nitrate concentrations as found in many fresh water ecosystems induced a significant increase in the portion of non culturable denitrifying bacteria. Referred to the investigation of dynamic populations, the number of metabolic active bacteria is represented by the MPN rather than by the PCR approach. Y1 - 2014 SN - 1945-3094 SN - 1945-3108 VL - 6 IS - 6 SP - 609 EP - 617 ER - TY - GEN A1 - Böllmann, Jörg A1 - Schöller, Markus T1 - Life cycle and life strategy features of Puccinia glechomatis (Uredinales) favorable for extending the natural range of distribution T2 - Mycoscience Y1 - 2006 U6 - https://doi.org/10.1007/s10267-006-0282-z SN - 1340-3540 VL - 47 IS - 3 SP - 152 EP - 158 ER - TY - GEN A1 - Böllmann, Jörg A1 - Scholler, Markus T1 - Glechoma hederacea (Lamiaceae) in North America: invasion history and current distribution T2 - Feddes Repertorium Y1 - 2004 U6 - https://doi.org/10.1002/fedr.200311035 SN - 0014-8962 SN - 1522-239X VL - 115 IS - 1-2 SP - 178 EP - 188 ER - TY - CHAP A1 - Böllmann, Jörg T1 - Die Bedeutung von Anthropochorie und die Verbreitung von infiziertem Wirtsgewebe am Beispiel des Rostpilzes Puccinia glechomatis T2 - Treffpunkt biologische Vielfalt, aktuelle Forschung im Rahmen des Übereinkommens über die biologische Vielfalt vorgestellt auf einer wissenschaftlichen Expertentagung an der Internationalen Naturschutzakademie Insel Vilm vom 21. - 25. August 2006 Y1 - 2007 UR - http://www.bfn.de/fileadmin/MDB/documents/service/skript207.pdf SP - 107 EP - 112 PB - Bundesamt für Naturschutz CY - Bonn [u.a.] ER - TY - CHAP A1 - Scholler, Markus A1 - Böllmann, Jörg T1 - Puccinia glechomatis and P. lagenophorae in North America: invasion patterns, life cycle and life strategies T2 - Mycological Society of America (MSA) annual meeting, Hilo (Hawaii), 2006 Y1 - 2006 UR - http://msafungi.org/wp-content/uploads/Inoculum/56%284%29.pdf N1 - Inoculum : newsletter of the Mycological Society of America 56(2006)4 ER -