Sedimentological and paleontological anaylsis of a profile from Lake Ohrid
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2009
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| _version_ | 1867167665682907136 |
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| author | Wagner, Bernd Lotter, André F Nowaczyk, Norbert R Reed, Jane M Schwalb, Antje Sulpizio, Roberto Valsecchi, Verushka Wessels, Martin Zanchetta, Giovanni |
| author_facet | Wagner, Bernd Lotter, André F Nowaczyk, Norbert R Reed, Jane M Schwalb, Antje Sulpizio, Roberto Valsecchi, Verushka Wessels, Martin Zanchetta, Giovanni |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Lake Ohrid is considered to be of Pliocene origin and is the oldest extant lake in Europe. A 1,075- cm-long sediment core was recovered from the southeastern part of the lake, from a water depth of 105 m. The core was investigated using geophysical, granulometric, biogeochemical, diatom, ostracod, and pollen analyses. Tephrochronology and AMS radiocarbon dating of plant macrofossils reveals that the sediment sequence spans the past ca. 39,500 years and features a hiatus between ca. 14,600 and 9,400 cal. year BP. The Pleistocene sequence indicates relatively stable and cold conditions, with steppe vegetation in the catchment, at least partial winter ice-cover of the lake, and oxygenated bottom waters at the coring site. The Holocene sequence indicates that the catchment vegetation had changed to forest dominated by pine and summer-green oak. Several of the proxies suggest the impact of abrupt climate oscillations such as the 8.2 or 4.0 ka event. The observed changes, however, cannot be related clearly to a change in temperature or humidity. Human impact started about 5,000 cal. year BP and increased significantly during the past 2,400 years. Water column mixing conditions, inflow from subaquatic springs, and human impact are the most important parameters influencing internal lake processes, notably affecting the composition and characteristics of the sediments. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_759796 |
| institution | PANGAEA |
| language | en |
| publishDate | 2009 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Sedimentological and paleontological anaylsis of a profile from Lake Ohrid Wagner, Bernd Lotter, André F Nowaczyk, Norbert R Reed, Jane M Schwalb, Antje Sulpizio, Roberto Valsecchi, Verushka Wessels, Martin Zanchetta, Giovanni Lake Ohrid, Macedonian/Albanian border; Lz1120; ohrid-exp; PCUWI; Piston corer, UWITEC; Sampling/drilling in lake Lake Ohrid is considered to be of Pliocene origin and is the oldest extant lake in Europe. A 1,075- cm-long sediment core was recovered from the southeastern part of the lake, from a water depth of 105 m. The core was investigated using geophysical, granulometric, biogeochemical, diatom, ostracod, and pollen analyses. Tephrochronology and AMS radiocarbon dating of plant macrofossils reveals that the sediment sequence spans the past ca. 39,500 years and features a hiatus between ca. 14,600 and 9,400 cal. year BP. The Pleistocene sequence indicates relatively stable and cold conditions, with steppe vegetation in the catchment, at least partial winter ice-cover of the lake, and oxygenated bottom waters at the coring site. The Holocene sequence indicates that the catchment vegetation had changed to forest dominated by pine and summer-green oak. Several of the proxies suggest the impact of abrupt climate oscillations such as the 8.2 or 4.0 ka event. The observed changes, however, cannot be related clearly to a change in temperature or humidity. Human impact started about 5,000 cal. year BP and increased significantly during the past 2,400 years. Water column mixing conditions, inflow from subaquatic springs, and human impact are the most important parameters influencing internal lake processes, notably affecting the composition and characteristics of the sediments. |
| title | Sedimentological and paleontological anaylsis of a profile from Lake Ohrid |
| topic | Lake Ohrid, Macedonian/Albanian border; Lz1120; ohrid-exp; PCUWI; Piston corer, UWITEC; Sampling/drilling in lake |
| url | https://doi.org/10.1594/PANGAEA.759796 |