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Böden mit besonderen Eigenschaften - trockene Böden

Grundlage der Ableitungen des Kriteriums ist die Bodenfunktionenkarte „Natürliche Bodenfruchtbarkeit“. Aus der Karte wurden die mit der Stufe I (sehr gering) bewerteten Bodenflächen selektiert. Von diesen wurden die Böden mit nassen/feuchten Eigenschaften getrennt. Abgebildet werden terrestrische Böden geringer Bodenmächtigkeit und Böden mit hohen Skeletteinschlüssen bzw. hohen Grobbodenanteilen. Diese Böden haben nur geringe bis sehr geringe Wasserspeichereigenschaften. Im Jahresverlauf fallen diese Böden durch Trockenheit auf. Typische natürliche Pflanzengesellschaften und Bodenorganismen sind an diese Bodenverhältnisse angepasst.

Oekosystemanalyse naturnaher Waelder und ihrer Ersatzgesellschaften

'Solling-Projekt' der DFG. Oekosystemanalyse naturnaher Waelder und ihrer Ersatzgesellschaften. Stoff- und Energieumsatz von Bodentieren (insbes. Curculioniden, Acari, Collembola, Enchytraeidae). Arbeiten an dominanten Arthropoden (Ermittlung populationsdynamischer Parameter wie Fluktuationen, Biomassen, Abundanzen, Phaenologien). Methodenverbesserungen bei Probenahme, Extraktion von Bodenproben.

Mittelwald

Auf zwei Versuchsflaechen wird diese historische Betriebsform in ihrer urspruenglichen Art betrieben. Ziel ist die Schaffung eines Anschauungs- und Studienobjektes. Daneben werden verjuengungsoekologische Fragen untersucht. Ornithologische und wildbiologische Begleituntersuchungen werden durchgefuehrt. Es wird untersucht: Zusammenhang zwischen Eichen-Naturverjuengung und Oberholzvorrat; Entwicklung der Naturverjuengung nach Lichtbedarf der Baumarten; zahlenmaessige Entwicklung nach Art, Lichtbedarf und Oberholzvorrat; Ausschlagsfaehigkeit der Stoecke im Unterholz nach Baumart, Alter des Stockes und Vitalitaet des stehenden Individuums vor der Nutzung; Entstehungsart und Ueberleben der Ausschlaege; Biomasse der Unterschicht ueber die Umtriebszeit; Kronenentwicklung und Vorratsentwicklung des Oberholzes ueber die Umtriebszeit.

Böden mit besonderen Eigenschaften - nasse und feuchte Böden

Grundlage der Ableitungen des Kriteriums ist die Bodenfunktionenkarte „Natürliche Bodenfruchtbarkeit“. Aus der Karte wurden die mit der Stufe I (sehr gering) bewerteten Bodenflächen selektiert. Von diesen wurden die Böden mit terrestrischen, trockenen Eigenschaften getrennt. Abgebildet werden besonders semiterrestrische Böden mit hohen bis sehr hohen Grundwasserständen sowie Böden mit hohen Stauwassereigenschaften. Diese Böden sind ganzjährig feucht oder nass. Sie haben einen geringen Wurzelraum und geringe bis sehr geringe Wasserspeichereigenschaften. Typische natürliche Pflanzengesellschaften und Bodenorganismen sind an diese Bodenverhältnisse angepasst.

Tree inventory dataset of floodplain forest, Leipzig, Germany

Leipzig is the only major German city in which extensive hardwood floodplain forests have been preserved. At present, drying out and a lack of hydrodynamics pose the greatest challenges for the conservation of the floodplain landscape. Restoring typical floodplain hydrological conditions and habitats can sustainably safeguard biodiversity and numerous ecosystem services in the medium term. To this end, the Lebendige Luppe project aim to reactivate typical floodplain hydrodynamics with inundation over large areas, the restoration of old river courses and the conversion of intensively farmed areas into typical floodplain habitats. The Lebendige Luppe project, itself is a joint project of cities of Leipzig and Schkeuditz and the NABU Saxony as implementation partner and the University of Leipzig and the UFZ-Helmholtz Centre (Partner for accompanying natural and social science) (Scholz et al. 2022). The implemented and planned restoration measures are accompanied by long-term scientific monitoring (UFZ and Leipzig University). For this purpose, 60 permanent observation plots were set up in the area of the measures according to the BACI design (Before-After / Control-Impact), on which the diversity of selected indicator groups (vegetation, molluscs, ground beetles) as well as groundwater dynamics, water and material balance in the soil, carbon storage and forest growth are recorded (Scholz et al. 2022). By integrating further landscape ecology and nature conservation data, a comprehensive analysis of the status quo and the changes in site conditions, biodiversity and ecosystem functions of the floodplain resulting from the expected floodplain dynamisation is possible, which goes beyond what has been available to date. The resulting simulation of hardwood forest responses to the changing abiotic environmental variables are already the basis for assessing the impact of the planned measures in the implementation process. This data publication contains the tree inventory data of the scientific accompanying research of the winters 2013/2014 and 2016/2017 (first inventory) and a repeat inventory from the winter of 2020/21. The Leipzig riparian forest distributed on old hardwood riparian forest (main tree population older than 90 years) of the forestry office of the city of Leipzig and Sachsenforst as state forest (Scholz et al. 2022). All stands were identified as Riparian mixed forests of Quercus robur, Ulmus laevis and Ulmus minor, Fraxinus excelsior or Fraxinus angustifolia, along the great rivers (Ulmenion minoris) – Annex I habitat type (code 91F0).

Towards pollen accumulation rates as a measure of plant abundance a case study in NE-Germany

The aim of my study is to calibrate PAR from small lakes against tree biomass, which can be used to achieve quantitative estimates of biomass in the past. Furthermore, the relation between pollen percentages and plant abundance will also be investigated. As study area, the state Brandenburg was chosen, because it has a large number of lakes and is covered by different plant communities, like conifer forest, mixed forest, deciduous forest and open land. These are situated on a range of soil types in a terrain with little altitudinal differences. Lakes in different types of landscape were selected. They were of almost uniform size, mostly ranging from 100-300 m in diameter and without inflow and outflow. Deeper lakes in proportion to the lake size were preferred, to avoid lakes with a high pollen redeposition. In order to have an effective fieldwork and to get the broadest possible data spectrum for modeling, the relevant pollen source area of pollen (Sugita, 1994) was estimated, based on the map CORINE. The calculation shows that the pollen source area is approximately 5-6 km. However, we also sampled lakes which are situated closer together, especially when the landscape structure was very heterogenic at the small scale. From the surface samples of 50 lakes, the pollen percentages of different taxa will be compared with the information from the forest inventory data for different distances around the lakes to evaluate theoretical considerations of pollen source area. These data are available at the data base Datenspeicher Wald, which contains information about cover, age and biomass for the different tree species. This information was collected during the time of the German Democratic Republic (DDR) and is in the most continued. Concurrently, 15 of the short cores are selected for dating by 210Pb. PAR will be calculated based on the sedimentation rates obtained for these cores, so that PAR can be compared to tree biomass for different time slices over the past 50 years.

Classification and Mapping of the North

Our research efforts intend to contribute to the development of a syntaxonomical vegetation classification system for the entire Arctic territory. Such a system enables a proper identification of the vegetation types and consequently an evaluation of their biological and ecological importance on local, regional and circumpolar scales. We use a modified, modern version of the Braun-Blanquet approach. Special attention is paid to detailed analyses of the composition of the bryophyte and lichen flora within the sample plots as well as to a detailed analysis of habitat and distribution of the vegetation. We focus on Greenland which holds geographically an intermediate position between Eurosiberia and the North-America continent. The syntaxonomical survey includes characterization of the plant communities and their habitat and distribution. Vegetation mapping displays local and regional distribution. Comparative studies are carried out in - Alaska and Canada (Southwest Alaska, Nunuvat) and we closely cooperate with Russian, European and American geobotanists and landscape ecologists. Ongoing research: Survey of the vegetation of Northwest Greenland (between 70-73 degree N)- vegetation of eastern North Greenland (southem Mylius Erichsen Land and southern Kronsprins Christian Land)-classification of dwarf shrub and terricolous lichen vegetation-vegetation mapping (CAVM-project) and characterization and delimination of altitudinal belts in the inland of West Greenland (project AZV Greenland).

AZV Project West Greenland

The AZV (Altitudinal Zonation of Vegetation) Project was initiated in the year 2002. On the basis of a detailed regional study in continental West Greenland the knowledge about altitudinal vegetation zonation in the Arctic is aimed to be enhanced. The main objectives of the project are: a) considering the regional study: characterize mountain vegetation with regard to flora, vegetation types, vegetation pattern and habitat conditions, investigate the differentiation of these vegetation characteristics along the altitudinal gradient, develop concepts about altitudinal indicator values of species and plant communities, extract suitable characteristics for the distinction and delimitation of vegetation belts, assess altitudinal borderlines of vegetation belts in the study area. b) considering generalizations: test the validity of the altitudinal zonation hypothesis of the Circumpolar Arctic Vegetation Map ( CAVM Team 2003), find important determinants of altitudinal vegetation zonation in the Arctic, develop a first small scale vegetation map of entire continental West Greenland. Field work consists of vegetational surveys according to the Braun-Blanquet approach, transect studies, soil analyses, long-time-measurements of temperature on the soil surface and vegetation mapping in three different altitudinal vegetation belts (up to 1070 m a.s.l.).

KIBI, Teilvorhaben: mundialis Gmbh & Co. KG

Vegetation und Umweltbedingungen der Oberharzer Stauteiche heute und in Zukunft

Nach Darstellung der Standortverhaeltnisse im Bereich der ca. 70 noch bestehenden Oberharzer Stauteiche - die zur Versorgung des Harzer Bergbaus mit Wasserkraft angelegt wurden - werden das Artengefuege und die Verbreitung ihrer Pflanzengesellschaften durch Tabellen bzw. Verbreitungskarten erlaeutert. Von einigen Teichen sind Vegetationskarten bzw. -transekte erarbeitet worden. Aspekte der Entwicklung des Teichgebietes bei Aenderung der Nutzung und Vorschlaege fuer die Erhaltung der auch aus kultur- und baugeschichtlicher Sicht wertvollen Anlagen runden die Arbeit ab.

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