@article{WallschlaegerBeierBurkartetal.2004, author = {Wallschl{\"a}ger, Hans-Dieter and Beier, Wolfgang and Burkart, Michael and Mrzljak, Jadranka and Oehlschl{\"a}ger, Susanne and Wanner, Manfred}, title = {{\"O}kologische Datenerfassung f{\"u}r Naturschutzbewertung und Monitoring im Offenland}, isbn = {3-540-22449-1}, year = {2004}, language = {de} } @article{BurkartPrasse1996, author = {Burkart, Michael and Prasse, R{\"u}diger}, title = {Zur pflanzlichen Besiedlung wechselnasser Pionierstandorte im Elbhavelwinkel}, year = {1996}, language = {de} } @article{BurkartPoetsch1996, author = {Burkart, Michael and P{\"o}tsch, Joachim}, title = {Zur floristischen Gliederung und Syntaxonomie der Brenndoldenwiesen in der Unteren Havelaue}, year = {1996}, language = {de} } @article{RistowBurkartPrasse1997, author = {Ristow, Michael and Burkart, Michael and Prasse, R{\"u}diger}, title = {Zum Vorkommen der Bleichen Hainsimse, Luzula pallidula Kirschner (syn. L. pallescens auct.) in Brandenburg}, year = {1997}, language = {de} } @article{ZielhoferSchmidtReicheetal.2022, author = {Zielhofer, Christoph and Schmidt, Johannes and Reiche, Niklas and Tautenhahn, Marie and Ballasus, Helen and Burkart, Michael and Linst{\"a}dter, Anja and Dietze, Elisabeth and Kaiser, Knut and Mehler, Natascha}, title = {The lower Havel River Region (Brandenburg, Germany)}, series = {Water}, volume = {14}, journal = {Water}, number = {3}, publisher = {MDPI}, address = {Basel}, issn = {2073-4441}, doi = {10.3390/w14030480}, pages = {23}, year = {2022}, abstract = {Instrumental data show that the groundwater and lake levels in Northeast Germany have decreased over the past decades, and this process has accelerated over the past few years. In addition to global warming, the direct influence of humans on the local water balance is suspected to be the cause. Since the instrumental data usually go back only a few decades, little is known about the multidecadal to centennial-scale trend, which also takes long-term climate variation and the long-term influence by humans on the water balance into account. This study aims to quantitatively reconstruct the surface water areas in the Lower Havel Inner Delta and of adjacent Lake Gulpe in Brandenburg. The analysis includes the calculation of surface water areas from historical and modern maps from 1797 to 2020. The major finding is that surface water areas have decreased by approximately 30\% since the pre-industrial period, with the decline being continuous. Our data show that the comprehensive measures in Lower Havel hydro-engineering correspond with groundwater lowering that started before recent global warming. Further, large-scale melioration measures with increasing water demands in the upstream wetlands beginning from the 1960s to the 1980s may have amplified the decline in downstream surface water areas.}, language = {en} } @article{HavingaKoolAchilleetal.2016, author = {Havinga, Reinout and Kool, Anneleen and Achille, Frederic and Bavcon, Joze and Berg, Christian and Bonomi, Costantino and Burkart, Michael and De Meyere, Dirk and Havstrom, Mats and Kessler, Paul and Knickmann, Barbara and Koester, Nils and Martinez, Remy and Ostgaard, Havard and Ravnjak, Blanka and Scheen, Anne-Cathrine and Smith, Pamela and Smith, Paul and Socher, Stephanie A. and Vange, Vibekke}, title = {The Index Seminum: Seeds of change for seed exchange}, series = {Taxon}, volume = {65}, journal = {Taxon}, publisher = {International Association for Plant Taxonomy}, address = {Bratislava}, issn = {0040-0262}, doi = {10.12705/652.9}, pages = {333 -- 336}, year = {2016}, abstract = {Botanic gardens have been exchanging seeds through seed catalogues for centuries. In many gardens, these catalogues remain an important source of plant material. Living collections have become more relevant for genetic analysis and derived research, since genomics of non-model organisms heavily rely on living material. The range of species that is made available annually on all seed lists combined, provides an unsurpassed source of instantly accessible plant material for research collections. Still, the Index Seminum has received criticism in the past few decades. The current exchange model dictates that associated data is manually entered into each database. The amount of time involved and the human errors occurring in this process are difficult to justify when the data was initially produced as a report from another database. The authors propose that an online marketplace for seed exchange should be established, with enhanced search possibilities and downloadable accession data in a standardised format. Such online service should preferably be supervised and coordinated by Botanic Gardens Conservation International (BGCI). This manuscript is the outcome of a workshop on July 9th, 2015, at the European botanic gardens congress "Eurogard VII" in Paris, where the first two authors invited members of the botanic garden community to discuss how the anachronistic Index Seminum can be transformed into an improved and modern tool for seed exchange.}, language = {en} } @article{KummerBurkart1995, author = {Kummer, Volker and Burkart, Michael}, title = {Scolochloa festucacea (WILLD.) LINK in der Unteren Havelniederung Sachsen-Anhalts}, year = {1995}, language = {de} } @article{ScharfBurkart2021, author = {Scharf, Uwe and Burkart, Michael}, title = {Sansevieria pfennigii (Ruscaceae, Asparagales)}, series = {Phytotaxa : a rapid international journal for accelerating the publication of botanical taxonomy}, volume = {483}, journal = {Phytotaxa : a rapid international journal for accelerating the publication of botanical taxonomy}, number = {1}, publisher = {Magnolia Press}, address = {Auckland}, issn = {1179-3155}, doi = {10.11646/phytotaxa.483.1.1}, pages = {1 -- 8}, year = {2021}, abstract = {Sansevieria pfennigii, which to date has been a doubtful species, is confirmed as extant by a recent collection from the Lindi Region in southern Tanzania. The original description of the species, which is based on herbarium material only, is here emended based on additional observations recorded from living plants, including fruits that were previously unknown. Sansevieria pfennigii distinguishes from S. canaliculata, to which it was repeatedly assigned, by its capitate instead of elongate inflorescence, rough rather than smooth leaves, non-pungent instead of pungent leaf tips, dull green leaf colour, more delicate overall appearance, alongside other traits. The difference in inflorescence architecture indicates that these species belong to different groups within Sansevieria and are not closely related; the closest relatives of S. pfennigii are probably S. fischeri and S. stuckyi. Sansevieria pfennigii occurs on well-drained soil in forests, close to S. canaliculata populations. According to the extent of the population seen and the species' overall rarity, it is tentatively assessed as critically endangered.}, language = {en} } @article{Burkart2001, author = {Burkart, Michael}, title = {River corridor plants (Stromtalpflanzen) in Central European lowland : a review of a poorly understood plant distribution pattern}, year = {2001}, abstract = {Aim and Location In Central European lowland certain plant species grow mainly or exclusively in the corridors of large rivers. In German-speaking plant geography, they are known as "Stromtalpflanzen". The aim of this paper is to review the literature about definitions, explanations and species characteristics and to suggest future directions in research concerning this species group. Results A preliminary list contains 129 ecologically heterogeneous plant species. The mechanisms generating the peculiar distribution pattern may include hydrochory along river corridors, high level of disturbance by water, variable water availability including inundation and summer drought, warm summers, and high nutrient supply on alluvial soils. There is evidence from observational studies for all above mechanisms. However, none of them has been tested experimentally. Demographic data of river corridor plants is limited to very few species, including mainly invasive annuals (Artemisia annua, Bidens frondosa, Cuscuta campestris, Xanthium albinum) and annual (hemi)parasites (Cuscuta campestris, Melampyrum cristatum). Metapopulation studies do not exist to date for European species. part from their habitat requirements, river corridor plants were grouped according to their similarities in overall distribution pattern or in their distribution within particular river corridors. Main conclusions River corridor plants include a high proportion of threatened plant species. In order to preserve them, and in order to understand the mechanisms generating the peculiar distribution pattern, much more has to be known about their population biology and metapopulation dynamics.}, language = {en} } @article{BurkartWichmann2003, author = {Burkart, Michael and Wichmann, Matthias}, title = {River corridor plants (Stromtalpflanzen) : new ideas to approach an old distribution pattern}, year = {2003}, abstract = {Rivers form the most important natural corridors through the landscape. Certain plant species grow mainly or exclusively in these corridors as it has been observed for about 150 years in Central European lowlands. However, these species do not form a homogenous group in terms of biogeography, site requirements, life form, or any other feature this distribution pattern. Accordingly, first, we give a review of the various hypotheses which have been proposed to explain the river corridor distribution pattern. This includes (1) river corridors acting as routes of migration or invasion, (2) floodplain-specific disturbance providing open sites, (3) temporary anoxic conditions during floods, (4) deviating meso-climatic conditions, (5) specific substrate and nutrient supply, and (6) water supply. In particular, the above hypotheses (2-5) imply that river corridor plants may be well-adapted to specific stress and regeneration conditions in floodplains while other species may be not. This may lead to reduced competition in river corridors. We suggest this mechanism to constitute actual benefits for river corridor plants. Secondly, we present a simple model of multi-species population dynamics to show, that our competition-related framework is, in principle, able to explain river corridor plant species distribution patterns. As, however, none of the above hypotheses (1-6) have been tested experimentally we thirdly present a currently running experimental study on the river corridor plant Juncus atratus (black rush) in north- eastern Germany. We emphasize that much more experimental evidence must be gained on population ecology and meta- population dynamics to understand the distribution patterns of river corridor plants.}, language = {en} } @article{MartinHerppichRoscheretal.2019, author = {Martin, Craig E. and Herppich, Werner B. and Roscher, Yvonne and Burkart, Michael}, title = {Relationships between leaf succulence and Crassulacean acid metabolism in the genus Sansevieria (Asparagaceae)}, series = {Flora : morphology, distribution, functional ecology of plants}, volume = {261}, journal = {Flora : morphology, distribution, functional ecology of plants}, publisher = {Elsevier}, address = {M{\"u}nchen}, issn = {0367-2530}, doi = {10.1016/j.flora.2019.151489}, pages = {8}, year = {2019}, abstract = {Relationships between different measures of succulence and Crassulacean acid metabolism (CAM; defined here as nocturnal increases in tissue acidity) were investigated in leaves of ten species of Sansevieria under greenhouse conditions. CAM was found in seven of the ten species investigated, and CAM correlated negatively with leaf thickness and leaf hydrenchyma/chlorenchyma ratio. Similarly, CAM correlated negatively with leaf water content, but only when expressed on a fresh mass basis. CAM was not correlated with "mesophyll succulence", but weakly with leaf chlorophyll concentration. These results indicate that CAM is associated more with "all-cell succulence" and not with the amount of leaf hydrenchyma in the genus Sansevieria. The findings of this study emphasize the importance of defining the nature of "leaf succulence" in studies of photosynthetic pathways and leaf morphology. Evidence is also provided that CAM and succulence arose multiple times in the genus Sansevieria.}, language = {en} } @article{BurkartAlslebenLachmuthetal.2010, author = {Burkart, Michael and Alsleben, Katja and Lachmuth, Susanne and Schumacher, Juliane and Hofmann, Ralf and Jeltsch, Florian and Schurr, Frank Martin}, title = {Recruitment requirements of the rare and threatened Juncus atratus}, issn = {0367-2530}, doi = {10.1016/j.flora.2009.08.003}, year = {2010}, abstract = {The long-term persistence of populations and species depends on the successful recruitment of individuals. The generative recruitment of plants may be limited by a lack of suitable germination and establishment conditions. Establishment limitation may especially be caused by the competitive effect of surrounding dense vegetation, which is believed to restrict the recruitment success of many plant species to small open patches ('safe sites'). We conducted experiments to clarify the roles of germination and seedling establishment as limiting processes in the recruitment of Juncus atratus Krock., a rare and threatened herbaceous perennial river corridor plant in Central Europe. Light intensity had a positive effect on germination. However, some seedlings emerged even in total darkness and the germination rate at 1\% light intensity was more than half of that at 60\% light intensity. Seedling establishment in the field after 10 weeks was 30\% on bare ground, but it was close to zero in grassland. Establishment in the growth chamber after 8 weeks was close to 75\% for seedlings that germinated underwater, but only about 35\% for seedlings that germinated afloat. Furthermore, establishment decreased with flooding duration on bare ground, but increased with flooding duration in grassland. These data indicate that establishment, rather than germination, is a critical life stage in Central European populations off. atratus. They furthermore indicate that the competition of surrounding vegetation for water limits seedling establishment under field conditions without flooding, largely restricting establishment success to bare ground habitats. In contrast, grassland is more suitable for the recruitment off. atratus than bare ground under prolonged flooding. Grassland may facilitate the establishment off. atratus seedlings during long- lasting floods by supplying oxygen to the soil through aerenchyma. The shift from competition to facilitation in grassland occurred after 30 days of flooding, i.e. within the ontogeny of individual plants. The specific recruitment requirements off. arrows may be a main cause of its rarity in modern Central Europe. In order to prevent regional extinction off. atratus, we suggest maintaining or re-establishing natural hydrodynamics in the species' habitats.}, language = {en} } @article{LauterbachBurkartGemeinholzer2012, author = {Lauterbach, Daniel and Burkart, Michael and Gemeinholzer, Birgit}, title = {Rapid genetic differentiation between ex situ and their in situ source populations - an example of the endangered Silene otites (Caryophyllaceae)}, series = {Botanical journal of the Linnean Society}, volume = {168}, journal = {Botanical journal of the Linnean Society}, number = {1}, publisher = {Wiley-Blackwell}, address = {Hoboken}, issn = {0024-4074}, doi = {10.1111/j.1095-8339.2011.01185.x}, pages = {64 -- 75}, year = {2012}, abstract = {Ex situ cultivation in botanic gardens could be one possibility to preserve plant species diversity and genetic variation. However, old ex situ populations are often sparsely documented. We were able to retrieve three different ex situ populations and their source in situ populations of the endangered plant species Silene otites after 20-36 years of isolation. Furthermore, three additional wild populations were included in the analysis. Population genetic diversity and differentiation were analysed using AFLP markers. Genetic variation in the ex situ populations was lower than the variation found in the in situ populations. Strong differentiation (F-ST = 0.21-0.36) between corresponding in situ and ex situ populations was observed. Bayesian clustering approach also showed a distinct genetic separation between in situ and ex situ populations. The high genetic differentiation and loss of genetic diversity during spatial and temporal isolation in the ex situ populations can be attributable to small population sizes and unconscious selection during cultivation. Therefore, adequate sampling prior to ex situ cultivation and large effective population sizes are important to preserve genetic diversity. Near-natural cultivation allowing for generation overlap and interspecific competition without artificial selection is recommended as being best for the maintenance of the genetic constitution.}, language = {en} } @article{CuongNguyenHuuKappelKelleretal.2016, author = {Cuong Nguyen Huu, and Kappel, Christian and Keller, Barbara and Sicard, Adrien and Takebayashi, Yumiko and Breuninger, Holger and Nowak, Michael D. and B{\"a}urle, Isabel and Himmelbach, Axel and Burkart, Michael and Ebbing-Lohaus, Thomas and Sakakibara, Hitoshi and Altschmied, Lothar and Conti, Elena and Lenhard, Michael}, title = {Presence versus absence of CYP734A50 underlies the style-length dimorphism in primroses}, series = {eLife}, volume = {5}, journal = {eLife}, publisher = {eLife Sciences Publications}, address = {Cambridge}, issn = {2050-084X}, doi = {10.7554/eLife.17956}, pages = {15}, year = {2016}, abstract = {Heterostyly is a wide-spread floral adaptation to promote outbreeding, yet its genetic basis and evolutionary origin remain poorly understood. In Primula (primroses), heterostyly is controlled by the S-locus supergene that determines the reciprocal arrangement of reproductive organs and incompatibility between the two morphs. However, the identities of the component genes remain unknown. Here, we identify the Primula CYP734A50 gene, encoding a putative brassinosteroid-degrading enzyme, as the G locus that determines the style-length dimorphism. CYP734A50 is only present on the short-styled S-morph haplotype, it is specifically expressed in S-morph styles, and its loss or inactivation leads to long styles. The gene arose by a duplication specific to the Primulaceae lineage and shows an accelerated rate of molecular evolution. Thus, our results provide a mechanistic explanation for the Primula style-length dimorphism and begin to shed light on the evolution of the S-locus as a prime model for a complex plant supergene.}, language = {en} } @article{MuehleBurkartPoetsch1998, author = {M{\"u}hle, Ralf-Udo and Burkart, Michael and P{\"o}tsch, Joachim}, title = {On the importance of flooded grassland at the Ramsar site of the lower Havel river valley for waterfowl}, issn = {0761-9243}, year = {1998}, language = {en} } @article{TschoepeTielboergerBurkart2002, author = {Tsch{\"o}pe, Okka and Tielb{\"o}rger, Katja and Burkart, Michael}, title = {Offenlandmanagement auf ehemaligen Truppen{\"u}bungspl{\"a}tzen}, year = {2002}, language = {de} } @article{ProchnowBurkartMrzljaketal.2002, author = {Prochnow, Annette and Burkart, Michael and Mrzljak, Jadranka and Wiegleb, Gerhard}, title = {Offenland - Management auf Truppen{\"u}bungspl{\"a}tzen im pleistoz{\"a}nen Flachland Nordostdeutschlands}, year = {2002}, language = {de} } @article{BurkartBurkartGaertneretal.2002, author = {Burkart, Bettina and Burkart, Michael and G{\"a}rtner, P. and Heyne, K. and Katscher, Kathleen and Prochnow, Annette and Segert, Astrid and Siniza, Swetlana and Striese, Michael and Tsch{\"o}pe, Okka and Konold, Werner}, title = {Offenhaltung durch Beweidung mit Wildtieren}, year = {2002}, language = {de} } @article{KuehlingBurkartHinrichsenetal.2004, author = {K{\"u}hling, Matthias and Burkart, Michael and Hinrichsen, Arne and Oehlschl{\"a}ger, Susanne and Wallschl{\"a}ger, Hans-Dieter and Wiegleb, Gerhard and Wolters, Steffen}, title = {Offene Sandlandschaften Mitteleuropas, Truppen{\"u}bungspl{\"a}tze und Naturschutz}, isbn = {3-540-22449-1}, year = {2004}, language = {de} } @article{WichmannStaudlerHaaseetal.2000, author = {Wichmann, Matthias and Staudler, Holger and Haase, Peter and Burkart, Michael}, title = {Naturschutzfachliche Bewertung einer Pflegemaßnahme mit Galloways am S{\"u}dufer des G{\"u}lper See unter Einfluß hydrologischer Dynamik}, year = {2000}, abstract = {Since 1993 the southern shore of Lake G{\"u}lpe in western Brandenburg has been man-aged with Galloway cattle. This is supported by the so called "Vertragsnaturschutz" (i.e. contract nature conservation) in order to preserve the valuable, species-rich vegetation structure. This is an economically justifiable arrangement for the Galloway cattle-farmer. Permanent botanical plots were monitored in the area for four years. For most species, the observed changes in vegetation are considered as mere fluctuations on the basis of their known ecological requirements and data on hydrological dynamics during the study. Only a few species might indicate succession. A continuation of the present form of land management is recommended for the preservation of the current vegetation structure. However it is advisable to continue with monitoring of the vegetation in order to confirm the results over larger timescales. Until then the management with Galloway cattle is to acclaim as a proper treatment to preserve the southern shore of Lake G{\"u}lpe.}, language = {de} } @book{BurkartDierschkeHoelzeletal.2004, author = {Burkart, Michael and Dierschke, Hartmut and H{\"o}lzel, Norbert and Nowak, Bernd and Fartmann, Thomas}, title = {Molinio-Arrhenatheretea = Kulturgrasland und verwandte Vegetationstypen. Teil 2: Molinietalia}, series = {Synopsis der Pflanzengesellschaften Deutschlands}, volume = {9}, journal = {Synopsis der Pflanzengesellschaften Deutschlands}, publisher = {Selbstverl. der Floristisch-Soziologischen Arbeitsgemeinschaft}, address = {G{\"o}ttingen}, issn = {1433-8440}, pages = {103 S.}, year = {2004}, language = {de} } @article{TschoepeWallschlaegerBurkartetal.2011, author = {Tsch{\"o}pe, Okka and Wallschl{\"a}ger, Hans-Dieter and Burkart, Michael and Tielb{\"o}rger, Katja}, title = {Managing open habitats by wild ungulate browsing and grazing a case-study in North-Eastern Germany}, series = {Applied vegetation science : official organ of the International Association for Vegetation Science}, volume = {14}, journal = {Applied vegetation science : official organ of the International Association for Vegetation Science}, number = {2}, publisher = {Wiley-Blackwell}, address = {Hoboken}, issn = {1402-2001}, doi = {10.1111/j.1654-109X.2010.01119.x}, pages = {200 -- 209}, year = {2011}, abstract = {Question: Can wild ungulates efficiently maintain and restore open habitats? Location: Brandenburg, NE Germany. Methods: The effect of wild ungulate grazing and browsing was studied in three successional stages: (1) Corynephorus canescens-dominated grassland; (2) ruderal tall forb vegetation dominated by Tanacetum vulgare; and (3) Pinus sylvestris-pioneer forest. The study was conducted over 3 yr. In each successional stage, six paired 4 m(2)-monitoring plots of permanently grazed versus ungrazed plots were arranged in three random blocks. Removal of grazing was introduced de novo for the study. In each plot, percentage cover of each plant and lichen species and total cover of woody plants was recorded. Results: Wild ungulates considerably affected successional pathways and species composition in open habitats but this influence became evident in alteration of abundances of only a few species. Grazing effects differed considerably between successional stages: species richness was higher in grazed versus ungrazed ruderal and pioneer forest plots, but not in the Corynephorus sites. Herbivory affected woody plant cover only in the Pioneer forest sites. Although the study period was too short to observe drastic changes in species richness and woody plant cover, notable changes in species composition were still detected in all successional stages. Conclusion: Wild ungulate browsing is a useful tool to inhibit encroachment of woody vegetation and to conserve a species-rich, open landscape.}, language = {en} } @article{Burkart1997, author = {Burkart, Michael}, title = {Kalkmagerrasen und Glatthaferwiesen im Unteren Werraland}, year = {1997}, language = {de} } @article{Burkart1996, author = {Burkart, Michael}, title = {Juncus atratus in Nordostdeutschland}, address = {Berlin}, year = {1996}, language = {en} } @article{MichalskiGautschiBurkartetal.2006, author = {Michalski, S and Gautschi, B and Burkart, Michael and Durka, Walter}, title = {Isolation and characterization of microsatellite loci in the rush Juncus atratus (Juncaceae)}, year = {2006}, language = {en} } @article{RennerNeumannBurkartetal.2012, author = {Renner, Swen C. and Neumann, Dirk and Burkart, Michael and Feit, Ute and Giere, Peter and Groeger, Andreas and Paulsch, Axel and Paulsch, Cornelia and Sterz, Mario and Vohland, Katrin}, title = {Import and export of biological samples from tropical countries-considerations and guidelines for research teams}, series = {Organisms, diversity \& evolution : official journal of the Gesellschaft f{\"u}r Biologische Systematik}, volume = {12}, journal = {Organisms, diversity \& evolution : official journal of the Gesellschaft f{\"u}r Biologische Systematik}, number = {1}, publisher = {Springer}, address = {Heidelberg}, issn = {1439-6092}, doi = {10.1007/s13127-012-0076-4}, pages = {81 -- 98}, year = {2012}, abstract = {'Biodiversity' is increasingly perceived as an important resource for research and conservation, but also for economy. Conservation, access and sustainable use of biodiversity (genetic resources, species, samples) are negotiated on different political levels, resulting in an internationally binding legal framework. Resulting legislation is binding for all parties involved in biological sampling, i.e. researches and (and in italics) countries, and especially applies for tissue or DNA samples and dervied products thereof. Understanding and awareness of export and import permits for biological samples is increasingly important for biologists to perform research projects legally and timely. Nevertheless, some biologists are still exporting and importing biological samples ignoring or noncompliant with national and international legislation, conventions, and regulations. Resulting difficulties may not only cause serious problems during field work, but may also delay the export, import or exchange of samples. Comprehensive a priori information regarding legal requirements helps to avoid or at least diminish potential problems. We identified four major factors facilitating export/import permits: (1) good personal (mutually trusted) contacts in the country of origin, (2) understanding and compliance with all relevant laws and regulations; (3) access to information regarding knowledge on permits, regulations and laws including their circulation within the researcher communities; and (4) access to consistent and up to date regulations}, language = {en} } @article{TschoepeBurkartTielboerger2002, author = {Tsch{\"o}pe, Okka and Burkart, Michael and Tielb{\"o}rger, Katja}, title = {Habitat management in former military training area by means of Megaherbivores}, year = {2002}, language = {en} } @misc{ZaplataNhabangaStalmansetal.2020, author = {Zaplata, Markus Klemens and Nhabanga, Abel and Stalmans, Marc and Volpers, Thomas and Burkart, Michael and Sperfeld, Erik}, title = {Grasses cope with high-contrast ecosystem conditions in the large outflow of the Banhine wetlands, Mozambique}, series = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, journal = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, number = {1}, issn = {1866-8372}, doi = {10.25932/publishup-57351}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-573515}, pages = {16}, year = {2020}, abstract = {Ecosystems with highly pulsed water supply must be better understood as climate change may increase frequency and severity of intense storms, droughts and floods. Here we collected data over 3 years (2016-2018) in the episodic wetland outflow channel (Aluize), Banhine National Park, in which the system state changed from dry to wet to dry. Field sampling included vegetation records, small-scale vegetation zoning, the seed bank and water and soil quality. The same main plant species were found in both dry and wet conditions across the riverbed of the outflow channel. We found only very few diaspores of plants in the soil after prolonged drought. In the subsequent flooded state, we examined very dense vegetation on the water surface, which was dominated by the gramineous species Paspalidium obtusifolium. This species formed a compact floating mat that was rooted to the riverbed. The Cyperaceae Bolboschoenus glaucus showed high clonal growth in the form of root tubers, which likely serve as important food reservoir during drought. Soil and water analyses do not indicate a limitation by nutrients. We outline how resident people may change the plant community structure with an increasing practice of setting fire to the meadows in the dried-up riverbed to facilitate plant regrowth as food for their livestock.}, language = {en} } @article{ZaplataNhabangaStalmansetal.2020, author = {Zaplata, Markus Klemens and Nhabanga, Abel and Stalmans, Marc and Volpers, Thomas and Burkart, Michael and Sperfeld, Erik}, title = {Grasses cope with high-contrast ecosystem conditions in the large outflow of the Banhine wetlands, Mozambique}, series = {African journal of ecology}, volume = {59}, journal = {African journal of ecology}, number = {1}, publisher = {Wiley}, address = {Hoboken}, issn = {0141-6707}, doi = {10.1111/aje.12820}, pages = {190 -- 203}, year = {2020}, abstract = {Ecosystems with highly pulsed water supply must be better understood as climate change may increase frequency and severity of intense storms, droughts and floods. Here we collected data over 3 years (2016-2018) in the episodic wetland outflow channel (Aluize), Banhine National Park, in which the system state changed from dry to wet to dry. Field sampling included vegetation records, small-scale vegetation zoning, the seed bank and water and soil quality. The same main plant species were found in both dry and wet conditions across the riverbed of the outflow channel. We found only very few diaspores of plants in the soil after prolonged drought. In the subsequent flooded state, we examined very dense vegetation on the water surface, which was dominated by the gramineous species Paspalidium obtusifolium. This species formed a compact floating mat that was rooted to the riverbed. The Cyperaceae Bolboschoenus glaucus showed high clonal growth in the form of root tubers, which likely serve as important food reservoir during drought. Soil and water analyses do not indicate a limitation by nutrients. We outline how resident people may change the plant community structure with an increasing practice of setting fire to the meadows in the dried-up riverbed to facilitate plant regrowth as food for their livestock.}, language = {en} } @article{BurkartKummerFischer1995, author = {Burkart, Michael and Kummer, Volker and Fischer, Wolfgang}, title = {Floristische Neu- und Wiederfunde im Gebiet der Unteren Havel}, year = {1995}, language = {de} } @unpublished{EnsslinTschoepeBurkartetal.2015, author = {Ensslin, Andreas and Tschoepe, Okka and Burkart, Michael and Joshi, Jasmin Radha}, title = {Fitness decline and adaptation to novel environments in ex situ plant collections: Current knowledge and future perspectives}, series = {: an international journal}, volume = {192}, journal = {: an international journal}, publisher = {Elsevier}, address = {Oxford}, issn = {0006-3207}, doi = {10.1016/j.biocon.2015.10.012}, pages = {394 -- 401}, year = {2015}, abstract = {The conservation of rare plant species as living collections in botanic gardens and arboreta has become an established tool in the battle against worldwide species' extinctions. However, the establishment of ex situ collections with a high conservation value requires a sound understanding of the evolutionary processes that may reduce the suitability of these collections for future reintroductions. Particularly, risks such as fitness decline of cultivated plants over time, trait shifts and loss of adaptation to the original habitat due to changes in selection regimes have rarely been addressed so far. Based on a literature review and results of our own project we show that genetic drift can lead to fitness decline in ex situ cultivated plants, but these drift effects strongly depend on the conditions and cultivation history in the ex situ facility. Furthermore, we provide evidence that shifts in traits such as germination and flowering time, and a decrease in stress tolerance to drought and competition can reduce the conservation value of ex situ collections. These threats associated with ex situ conditions require more attention by researchers, curators and conservationists. We need to increase knowledge on traits that are subject to novel selection pressures in ex situ collections, and to define population sizes that prevent genetic drift. Establishing conservation networks with replicated collections across gardens and balancing the seed contribution of mother plants to the next generation within a collection are suggested as first steps to increase the conservation value of ex situ plant collections. (C) 2015 Elsevier Ltd. All rights reserved.}, language = {en} } @article{FischerBurkartPasqualettoetal.2010, author = {Fischer, Markus and Burkart, Michael and Pasqualetto, Vanessa and van Kleunen, Mark}, title = {Experiment meets biogeography : plants of river corridor distribution are not more stress tolerant but benefit less from more benign conditions elsewhere}, issn = {1752-9921}, doi = {10.1093/Jpe/Rtq013}, year = {2010}, abstract = {Aims: Factors limiting distributions of species are fundamental to ecology and evolution but have rarely been addressed experimentally for multiple species. The conspicuous linear distribution patterns of plant species confined to river corridors in the Central European lowlands constitute an especially long-standing distribution puzzle. We experimentally tested our novel hypothesis that the tolerance of species to river corridor conditions is independent of the degree of confinement to river corridor habitats, but that species not confined to river corridors are better able to take advantage of the more benign non-river corridor conditions. Methods: We grew 42 herbaceous species differing in their confinement to river corridors in a common garden experiment on loamy soil typical for river corridor areas and sandy soil typical for non-river corridor areas, and with and without a flooding period. For a subset of species, we grew plants of both river corridor and non-river corridor origin to test for adaptation to river corridor conditions. Important findings: Species more confined to river corridor areas benefited less from the more benign non-flooded and non-river corridor soil conditions than species of wider distributional range did. For subsets of 7 and 12 widespread species, the response to flooding and soil origin, respectively, did not differ between plants from river corridor sites and plants from other sites, suggesting that the habitat tolerance of widespread species is clue to phenotypic plasticity rather than to local adaptation. Overall, we found clear support for our novel hypothesis that species not confined to river corridors are more able to take advantage of the more benign non-river corridor conditions. Our study provides a general hypothesis on differences between species confined to stressful habitats and widespread species out for test in further multispecies comparative experiments.}, language = {en} } @article{Burkart1997, author = {Burkart, Michael}, title = {Einige bemerkenswerte Pflanzenfunde im Gebiet der unteren Havel aus den Jahren 1995 und 1996}, year = {1997}, language = {de} } @article{BurkartHinrichsenKuehlingetal.2004, author = {Burkart, Michael and Hinrichsen, Arne and K{\"u}hling, Matthias and Oehlschl{\"a}ger, Susanne and Wallschl{\"a}ger, Hans-Dieter and Wiegleb, Gerhard and Wolters, Steffen}, title = {Einf{\"u}hrung : Offene Sandlandschaften Mitteleuropas ; Truppen{\"u}bungspl{\"a}tze und Naturschutz}, isbn = {3-540-22449-1}, year = {2004}, language = {de} } @article{WichmannBurkart2000, author = {Wichmann, Matthias and Burkart, Michael}, title = {Die Vegetationszonierung des Gr{\"u}nlandes am S{\"u}dufer des G{\"u}lper See}, year = {2000}, abstract = {Since 1992 the southern shore of the Lake G{\"u}lpe in western Brandenburg is managed with Galloway cattle to preserve species, vegetation and landscape pattern. This paper presents the vegetation zones which are influenced by the water balance being the most significant and dynamic location factor in the area. Following the plots from dry to wet sites the most important plant communities are: Diantho-Armerietum, Arrhenatheretalia-Gesellschaft (-community), Leonotodon saxatilis -Potentilla anserina-community, Caricetum gracilis as well as Glycerietum aquaticae and Cypero- Samoletum. 23 endangered species were found.}, language = {de} } @article{BurkartWichmannWattenbachetal.2003, author = {Burkart, Michael and Wichmann, Matthias and Wattenbach, Martin and P{\"o}tsch, Joachim}, title = {Die Vegetation der unteren Havelaue}, series = {Brandenburgische Umwelt-Berichte : BUB ; Schriftenreihe der Mathematisch-Naturwissenschaftlichen Fakult{\"a}t der Universit{\"a}t Potsdam}, volume = {13}, journal = {Brandenburgische Umwelt-Berichte : BUB ; Schriftenreihe der Mathematisch-Naturwissenschaftlichen Fakult{\"a}t der Universit{\"a}t Potsdam}, issn = {1434-2375}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-4035}, pages = {53 -- 71}, year = {2003}, language = {de} } @article{MuehleBurkartPoetsch1997, author = {M{\"u}hle, Ralf-Udo and Burkart, Michael and P{\"o}tsch, Joachim}, title = {Die Niederung der unteren Havel : ein Feuchtgebiet von internationaler Bedeutung}, year = {1997}, language = {de} } @phdthesis{Burkart1998, author = {Burkart, Michael}, title = {Die Gr{\"u}nlandvegetation der unteren Havelaue in syn{\"o}kologischer und syntaxonomischer Sicht}, series = {Archiv naturwissenschaftlicher Dissertationen}, volume = {7}, journal = {Archiv naturwissenschaftlicher Dissertationen}, publisher = {Galunder}, address = {Wiehl}, isbn = {3-931251-41-1}, pages = {[18], 157, A102 S. : graph. Darst., Kt.-Beil.}, year = {1998}, language = {de} } @article{KummerBurkart1997, author = {Kummer, Volker and Burkart, Michael}, title = {Die Flora der Stromtalwiesen an der unteren Havel und andere botanische Besonderheiten}, year = {1997}, language = {de} } @article{BurkartHoelzelLeyer2004, author = {Burkart, Michael and H{\"o}lzel, Norbert and Leyer, Ilona}, title = {Cnidion dubii Balatova-Tulackova 1966 nom. mut. propos., Brenndolden-Auenwiesen : mit einem Beitrag zur Bioz{\"o}nologie von Ralf-Udo M{\"u}hle und Thomas Fartmann}, year = {2004}, language = {de} } @article{BurkartItzerottZebisch2000, author = {Burkart, Michael and Itzerott, Sibylle and Zebisch, Marc}, title = {Classification of vegetation by chronosequences of NDVI from remote sensing and field data : the example of Uvs Nuur basin}, year = {2000}, language = {en} } @article{DammBurkart1995, author = {Damm, Christian and Burkart, Michael}, title = {Carex bigelowii Torr. ex. Schweinitz subsp. rigida Schulze-Motel und Carex vaginata Tausch am Brocken im Harz}, year = {1995}, language = {de} } @article{Burkart2000, author = {Burkart, Michael}, title = {Artemisia frigida in der nordwestlichen Mongolei : Merkmale und Standorte von drei unterschiedlichen Sippen}, year = {2000}, language = {de} } @article{BurkartKuesterSchelskietal.1998, author = {Burkart, Michael and K{\"u}ster, H. and Schelski, Anke and Potsch, J.}, title = {A historical and plant sociological appraisal of floodplain meadows in the lower Havel valley, northeast germany}, year = {1998}, language = {en} }