s/palaeoecology/paleoecology/gi
Ziel ist es, Methoden zu entwickeln, die geeignet sind alte Sedimente in Trockengebieten verlässlich zu datieren: (i) Entwicklung einer Methode um mittels kosmogenen 10Be and 53Mn terrestrische Alter von Mikrometeoriten (aus Trockenseesedimenten und der Gipsstaubbedeckung der Landschaft) zu bestimmen, (ii) Entwicklung und Anwendung der 10Be/21Ne-Bedeckungalterdatierung an Grobsedimenten, (iii) Entwicklung einer kosmogenen 21,22Ne Methode um Halit (Steinsalz) in Oberflächensedimenten (z.B. fossile Salzseen) zu datieren. Erwartete erschließbare Altersbereiche: ca. 1 bis 22 Ma bzw. ca. 0.5 bis 10 Ma, für 53Mn und 10Be/21Ne Bedeckungsaltersdatierung, es gibt keine theoretische Obergrenze für 21,22Ne.
Allgemeine pollenanalytische Untersuchungen zur postglazialen Waldentwicklung. Neben der palynologischen Erfassung von Grundzuegen der nacheiszeitlichen Vegetationsentwicklung in verschiedenen Naturraeumen Nordwestdeutschlands soll vor allem mit Hilfe pollenanalytischer Methoden der Nachweis anthropogener Eingriffe und Vegetationsveraenderungen untersucht werden.
Das Ziel des Projektes ist die Quantifizierung der Auswirkung von Landnutzungsänderungen in tropischen Gebieten auf biogeochemische Kreisläufe durch die Integration von Daten zahlreicher Gruppen des Sonderforschungsbereichs in einen biogeochemischen Modellierungsansatz. Dafür wollen wir das prozess-orientierte Landoberflächenmodel CLM für die dominierenden Landnutzungsarten in der Provinz Jambi auf Sumatra (Indonesien) anpassen und neue Beschreibungen der entsprechenden Funktionellen Vegetationseinheiten entwickeln. Nach der Modelvalidierung anhand von Messdaten, wollen wir die Auswirkungen von historischen, gegenwärtigen und zukünftigen Landnutzungsänderungen auf biogeochemische Kreisläufe auf Landschaftsebene untersuchen. Für die zukünftigen Auswirkungen werden Szenarien, die in dem Fokus entwickelt werden, verwendet.
This data set presents the reconstructed vegetation cover for 2773 sites based on harmonized pollen data from the data set LegacyPollen 2.0 (https://doi.pangaea.de/10.1594/PANGAEA.965907). 1040 sites are located in North America, 1287 in Europe, and 446 in Asia. Sugita's REVEALS model (2007) was applied to all pollen records using REVEALSinR from the DISQOVER package (Theuerkauf et al. 2016). Pollen counts were translated into vegetation cover by accounting for taxon-specific pollen productivity and fall speed. Additionally, relevant source areas of pollen were calculated using the aforementioned taxon-specific parameters and a Gaussian plume model for deposition and dispersal. Values for relative pollen productivity and fall speed from the synthesis from Wiezcorek and Herzschuh (2010) were updated with recent studies used to reconstruct vegetation cover. The average values from all Northern Hemisphere values were used where taxon-specific continental values were unavailable. As REVEALS was conceived to reconstruct vegetation from large lakes, only records originating from large lakes (>= 50h) are marked as "valid as site" in the dataset. Reconstructions from other records can be used when spatially averaging several together. An example script to do so is provided on Zenodo (https://doi.org/10.5281/zenodo.12800290). Reconstructed tree cover was validated using modern Landsat remote sensing forest cover. Reconstructed tree cover has much lower errors than the original arboreal pollen percentages. Reconstructions of individual taxa are more uncertain. We present tables with reconstructed vegetation cover for all continents with original parameters. As further details, we list a table with the taxon-specific parameters used, metadata for all records, and a list of parameters adjusted in the default version of REVEALSinR.
This data set presents the reconstructed vegetation cover for 446 Asian sites based on harmonized pollen data from the data set LegacyPollen 2.0. Sugita's REVEALS model (2007) was applied to all pollen records using REVEALSinR from the DISQOVER package (Theuerkauf et al. 2016). Pollen counts were translated into vegetation cover by accounting for taxon-specific pollen productivity and fall speed. Additionally, relevant source areas of pollen were calculated using the aforementioned taxon-specific parameters and a Gaussian plume model for deposition and dispersal. Values for relative pollen productivity and fall speed from the synthesis from Wiezcorek and Herzschuh (2010) were updated with recent studies used to reconstruct vegetation cover. The average values from all Northern Hemisphere values were used where taxon-specific continental values were unavailable. As REVEALS was conceived to reconstruct vegetation from large lakes, only records originating from large lakes (>= 50h) are marked as "valid as site" in the dataset. Reconstructions from other records can be used when spatially averaging several together. An example script to do so is provided on Zenodo (https://doi.org/10.5281/zenodo.12800290). Reconstructed tree cover was validated using modern Landsat remote sensing forest cover. Reconstructed tree cover has much lower errors than the original arboreal pollen percentages. Reconstructions of individual taxa are more uncertain. We present tables with reconstructed vegetation cover for all continents with original parameters. As further details, we list a table with the taxon-specific parameters used, metadata for all records, and a list of parameters adjusted in the default version of REVEALSinR.
This data set presents the reconstructed vegetation cover for 706 Asian sites based on harmonized pollen data from the data set LegacyPollen 2.0 and optimized RPP values. Sugita's REVEALS model (2007) was applied to all pollen records using REVEALSinR from the DISQOVER package (Theuerkauf et al. 2016). Pollen counts were translated into vegetation cover by taking into account taxon-specific pollen productivity and fall speed. Additionally, relevant source areas of pollen were also calculated using the aforementioned taxon-specific parameters and a gaussian plume model for deposition and dispersal and forest cover was reconstructed. In this optimized reconstruction, relative pollen productivity estimates for the ten most common taxa were first optimized by using reconstructed tree cover from modern pollen samples and LANDSAT remotely sensed tree cover (Sexton et al. 2013) for Asia. Values for non-optimized taxa for relative pollen productivity and fall speed were taken from the synthesis from Wiezcorek and Herzschuh (2020). The average values from all Northern Hemisphere values were used where taxon-specific continental values were not available. We present tables with optimized reconstructed vegetation cover for records in Asia. As further details we list a table with the taxon-specific parameters used and a list of parameters adjusted in the default version of REVEALSinR.
This data set presents the reconstructed vegetation cover for 1287 European sites based on harmonized pollen data from the data set LegacyPollen 2.0. Sugita's REVEALS model (2007) was applied to all pollen records using REVEALSinR from the DISQOVER package (Theuerkauf et al. 2016). Pollen counts were translated into vegetation cover by accounting for taxon-specific pollen productivity and fall speed. Additionally, relevant source areas of pollen were calculated using the aforementioned taxon-specific parameters and a Gaussian plume model for deposition and dispersal. Values for relative pollen productivity and fall speed from the synthesis from Wiezcorek and Herzschuh (2010) were updated with recent studies used to reconstruct vegetation cover. The average values from all Northern Hemisphere values were used where taxon-specific continental values were unavailable. As REVEALS was conceived to reconstruct vegetation from large lakes, only records originating from large lakes (>= 50h) are marked as "valid as site" in the dataset. Reconstructions from other records can be used when spatially averaging several together. An example script to do so is provided on Zenodo (https://doi.org/10.5281/zenodo.12800290). Reconstructed tree cover was validated using modern Landsat remote sensing forest cover. Reconstructed tree cover has much lower errors than the original arboreal pollen percentages. Reconstructions of individual taxa are more uncertain. We present tables with reconstructed vegetation cover for all continents with original parameters. As further details, we list a table with the taxon-specific parameters used, metadata for all records, and a list of parameters adjusted in the default version of REVEALSinR.
Die Moore im Bereich der Hornisgrinde (Nordschwarzwald) werden kartiert und oekoogisch relevante Parameter des Moorwassers werden gemessen. Anhand von Bohrkernen aus den Mooren werden durch Pollen, Grossreste und Geochemie die Entwicklung der Moore und ihrer Umgebung sowie die Einfluesse durch die Besiedelung der Region untersucht.
Die Kenntnis rezenter Lebensräume wird genutzt, um Modelle zur Rekonstruktion neogener und pleistozäner Habitate zu entwickeln. Es wird erwartet, dass die Nahrungsspezifität von Huftieren wichtige Hinweise liefert auf die Habitate der untersuchten Faunen. Evolutionstrends lassen sich dann mit Veränderungen im Habitat korrelieren.
Lake Ohrid is a large (360 km2) and deep (289 m) lake of tectonic origin and is shared between the Republics of Macedonia and Albania. Biological and biogeographical studies of the lake revealed an outstanding degree of endemism and suggest a Pliocene origin of Lake Ohrid, making the lake the oldest one in Europe. The high age and the high degree of endemism make Lake Ohrid a first class site to investigate the link between geological and biological evolution in ancient lakes. Given its importance as refugium and spreading centre, the lake was declared a UNESCO world heritage site in 1979, and included as a target site of the International Continental Scientific Drilling Program (ICDP) already in 1993. The political situation in the Balkan in the mid 1990ies, however, hampered further establishment of Lake Ohrid as potential ICDP site. This proposal bundle seeks funds for the detection of the timing of major evolutionary events, the investigation of the origin, the sedimentological inventory, neotectonic movements, and the paleoecology and paleolimnology of Lake Ohrid in order to develop a full ICDP proposal for deep drilling. Within the scope of this cover proposal funds for the coordination of the single proposals, for scientific exchange between the single bundle proponents, and for the data management are applied for.
| Origin | Count |
|---|---|
| Bund | 300 |
| Wissenschaft | 24 |
| Type | Count |
|---|---|
| Daten und Messstellen | 23 |
| Förderprogramm | 300 |
| unbekannt | 1 |
| License | Count |
|---|---|
| offen | 323 |
| unbekannt | 1 |
| Language | Count |
|---|---|
| Deutsch | 248 |
| Englisch | 135 |
| Resource type | Count |
|---|---|
| Archiv | 3 |
| Datei | 16 |
| Dokument | 4 |
| Keine | 213 |
| Webseite | 88 |
| Topic | Count |
|---|---|
| Boden | 279 |
| Lebewesen und Lebensräume | 296 |
| Luft | 221 |
| Mensch und Umwelt | 324 |
| Wasser | 238 |
| Weitere | 322 |