Pollen and dinoflagellate cyst counts on sediment core M72/5_628-1 (MD72/5-25-GC1) from the Black Sea
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2014
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| _version_ | 1867170972829745152 |
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| author | Shumilovskikh, Lyudmila S Fleitmann, Dominik |
| author_facet | Shumilovskikh, Lyudmila S Fleitmann, Dominik |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | High-resolution pollen and dinoflagellate cyst records from sediment core M72/5-25-GC1 were used to reconstruct vegetation dynamics in northern Anatolia and surface conditions of the Black Sea between 64 and 20 ka BP. During this period, the dominance of Artemisia in the pollen record indicates a steppe landscape and arid climate conditions. However, the concomitant presence of temperate arboreal pollen suggests the existence of glacial refugia in northern Anatolia. Long-term glacial vegetation dynamics reveal two major arid phases ~64-55 and 40-32 ka BP, and two major humid phases ~54-45 and 28-20 ka BP, correlating with higher and lower summer insolation, respectively. Dansgaard-Oeschger (D-O) cycles are clearly indicated by the 25-GC1 pollen record. Greenland interstadials are characterized by a marked increase in temperate tree pollen, indicating a spread of forests due to warm/wet conditions in northern Anatolia, whereas Greenland stadials reveal cold and arid conditions as indicated by spread of xerophytic biomes. There is evidence for a phase lag of ~500 to 1500 yr between initial warming and forest expansion, possibly due to successive changes in atmospheric circulation in the North Atlantic sector. The dominance of Pyxidinopsis psilata and Spiniferites cruciformis in the dinocyst record indicates brackish Black Sea conditions during the entire glacial period. The decrease of marine indicators (marine dinocysts, acritarchs) at ~54 ka BP and increase of freshwater algae (Pediastrum, Botryococcus) from 32 to 25 ka BP reveals freshening of the Black Sea surface water. This freshening is possibly related to humid phases in the region, to connection between Caspian Sea and Black Sea, to seasonal freshening by floating ice, and/or to closer position of river mouths due to low sea level. In the southern Black Sea, Greenland interstadials are clearly indicated by high dinocyst concentrations and calcium carbonate content, as a result of an increase in primary productivity. Heinrich events show a similar impact on the environment in the northern Anatolia/Black Sea region as Greenland stadials. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_833387 |
| institution | PANGAEA |
| language | en |
| publishDate | 2014 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Pollen and dinoflagellate cyst counts on sediment core M72/5_628-1 (MD72/5-25-GC1) from the Black Sea Shumilovskikh, Lyudmila S Fleitmann, Dominik 25-GC1; Abies; Acer; AGE; Alisma-type; Alnus; Apiaceae; Artemisia; Asteraceae; Ballota-type; Betula; Bistorta-type; Bitectatodinium tepikiense; Black Sea; Botryococcus; Brassicaceae; Buxus; Campanula trachelium-type; Cannabaceae; Carpinus betulus; Carya; Caryophyllaceae; Caspidinium rugosum; Castanea; Cedrus; Celtis; Centaurea alpina-type; Centaurea cyanus; Centaurea jacea-type; Cerealia-type; Chenopodiaceae; Cirsium; Cistus salvifolius; Coniferae; Cornus mas-type; Corylus; Cotinus coggygria; Counting, palynology; Cymatiosphaera; Cynoglossum; Cyperaceae; DEPTH, sediment/rock; Dinoflagellate cyst indeterminata; Dinoflagellate cyst reworked; Ephedra distachya-type; Ephedra fragilis-type; Ericaceae; Fabaceae; Fagus; Filipendula; Frangula alnus; Fraxinus angustifolia var. oxycarpa; Fraxinus excelsior-type; Galeopsis-type; GC; Gentiana pneumonanthe-type; Glomus; Gravity corer; Haloxylon; Hedera helix-type; Hedysarum hedysaroides; Helianthemum nummularium group; Helianthemum oelandicum-type; Helleborus foetidus; Hippophae; Ilex; Indeterminata; Jasione montana-type; Juglans; Juniperus; Knautia; Liguliflorae; Liliaceae; Lingulodinium machaerophorum; Linum; Liquidambar; Lycopodium spores counted; Lycopodium spores per tablet; Lycopodium tablets; M72/5; M72/5_628-1; Matricaria-type; Mentha-type; Meteor (1986); Micrhystridium; Multiplicisphaeridium; Muscari neglectum-type; Myrica; Olea; Operculodinium centrocarpum; Ornithogalum umbellatum-type; Ostrya-type; Papaver rhoeas group; Pediastrum; Phillyrea; Picea; Pinus; Pinus diploxylon-type; Pinus haploxylon-type; Pistacia; Plantago lanceolata-type; Plantago major/media-type; Plantago maritima-type; Platanus orientalis; Plumbaginaceae; Poaceae; Pollen, reworked; Polygonum aviculare-type; Potamogeton natans-type; Potentilla-type; Prunus-type; Pterocarya; Pulmonaria-type; Pyxidinopsis psilata; Quercus cerris-type; Quercus ilex-type; Quercus robur-type; Ranunculus acris-type; Rhamnus-type; Rheum; Rhinanthus-type; Rubiaceae; Rumex; Salix; Sambucus ebulus; Sanguisorba minor-type; Saussurea-type; Saxifraga aizoides-type; Saxifraga cuneifolia-type; Saxifraga stellaris-type; Scabiosa argentea; Scrophulariaceae; Senecio-type; Sorbus group; Sparganium-type; Spiniferites bentori; Spiniferites cruciformis; Spiniferites pachydermus; Spiniferites spp.; Symphytum; Tamarix; Taxus; Tectatodinium pellitum; Thalictrum; Tilia; Tribulus terrestris; Tsuga; Tuberculodinium vancampoae; Ulmus/Zelkova; Valeriana saxatilis-type; Varia; Verbena officinalis; Viburnum lantana; Vitis; Xanthium spinosum-type; Zygnemataceae High-resolution pollen and dinoflagellate cyst records from sediment core M72/5-25-GC1 were used to reconstruct vegetation dynamics in northern Anatolia and surface conditions of the Black Sea between 64 and 20 ka BP. During this period, the dominance of Artemisia in the pollen record indicates a steppe landscape and arid climate conditions. However, the concomitant presence of temperate arboreal pollen suggests the existence of glacial refugia in northern Anatolia. Long-term glacial vegetation dynamics reveal two major arid phases ~64-55 and 40-32 ka BP, and two major humid phases ~54-45 and 28-20 ka BP, correlating with higher and lower summer insolation, respectively. Dansgaard-Oeschger (D-O) cycles are clearly indicated by the 25-GC1 pollen record. Greenland interstadials are characterized by a marked increase in temperate tree pollen, indicating a spread of forests due to warm/wet conditions in northern Anatolia, whereas Greenland stadials reveal cold and arid conditions as indicated by spread of xerophytic biomes. There is evidence for a phase lag of ~500 to 1500 yr between initial warming and forest expansion, possibly due to successive changes in atmospheric circulation in the North Atlantic sector. The dominance of Pyxidinopsis psilata and Spiniferites cruciformis in the dinocyst record indicates brackish Black Sea conditions during the entire glacial period. The decrease of marine indicators (marine dinocysts, acritarchs) at ~54 ka BP and increase of freshwater algae (Pediastrum, Botryococcus) from 32 to 25 ka BP reveals freshening of the Black Sea surface water. This freshening is possibly related to humid phases in the region, to connection between Caspian Sea and Black Sea, to seasonal freshening by floating ice, and/or to closer position of river mouths due to low sea level. In the southern Black Sea, Greenland interstadials are clearly indicated by high dinocyst concentrations and calcium carbonate content, as a result of an increase in primary productivity. Heinrich events show a similar impact on the environment in the northern Anatolia/Black Sea region as Greenland stadials. |
| title | Pollen and dinoflagellate cyst counts on sediment core M72/5_628-1 (MD72/5-25-GC1) from the Black Sea |
| topic | 25-GC1; Abies; Acer; AGE; Alisma-type; Alnus; Apiaceae; Artemisia; Asteraceae; Ballota-type; Betula; Bistorta-type; Bitectatodinium tepikiense; Black Sea; Botryococcus; Brassicaceae; Buxus; Campanula trachelium-type; Cannabaceae; Carpinus betulus; Carya; Caryophyllaceae; Caspidinium rugosum; Castanea; Cedrus; Celtis; Centaurea alpina-type; Centaurea cyanus; Centaurea jacea-type; Cerealia-type; Chenopodiaceae; Cirsium; Cistus salvifolius; Coniferae; Cornus mas-type; Corylus; Cotinus coggygria; Counting, palynology; Cymatiosphaera; Cynoglossum; Cyperaceae; DEPTH, sediment/rock; Dinoflagellate cyst indeterminata; Dinoflagellate cyst reworked; Ephedra distachya-type; Ephedra fragilis-type; Ericaceae; Fabaceae; Fagus; Filipendula; Frangula alnus; Fraxinus angustifolia var. oxycarpa; Fraxinus excelsior-type; Galeopsis-type; GC; Gentiana pneumonanthe-type; Glomus; Gravity corer; Haloxylon; Hedera helix-type; Hedysarum hedysaroides; Helianthemum nummularium group; Helianthemum oelandicum-type; Helleborus foetidus; Hippophae; Ilex; Indeterminata; Jasione montana-type; Juglans; Juniperus; Knautia; Liguliflorae; Liliaceae; Lingulodinium machaerophorum; Linum; Liquidambar; Lycopodium spores counted; Lycopodium spores per tablet; Lycopodium tablets; M72/5; M72/5_628-1; Matricaria-type; Mentha-type; Meteor (1986); Micrhystridium; Multiplicisphaeridium; Muscari neglectum-type; Myrica; Olea; Operculodinium centrocarpum; Ornithogalum umbellatum-type; Ostrya-type; Papaver rhoeas group; Pediastrum; Phillyrea; Picea; Pinus; Pinus diploxylon-type; Pinus haploxylon-type; Pistacia; Plantago lanceolata-type; Plantago major/media-type; Plantago maritima-type; Platanus orientalis; Plumbaginaceae; Poaceae; Pollen, reworked; Polygonum aviculare-type; Potamogeton natans-type; Potentilla-type; Prunus-type; Pterocarya; Pulmonaria-type; Pyxidinopsis psilata; Quercus cerris-type; Quercus ilex-type; Quercus robur-type; Ranunculus acris-type; Rhamnus-type; Rheum; Rhinanthus-type; Rubiaceae; Rumex; Salix; Sambucus ebulus; Sanguisorba minor-type; Saussurea-type; Saxifraga aizoides-type; Saxifraga cuneifolia-type; Saxifraga stellaris-type; Scabiosa argentea; Scrophulariaceae; Senecio-type; Sorbus group; Sparganium-type; Spiniferites bentori; Spiniferites cruciformis; Spiniferites pachydermus; Spiniferites spp.; Symphytum; Tamarix; Taxus; Tectatodinium pellitum; Thalictrum; Tilia; Tribulus terrestris; Tsuga; Tuberculodinium vancampoae; Ulmus/Zelkova; Valeriana saxatilis-type; Varia; Verbena officinalis; Viburnum lantana; Vitis; Xanthium spinosum-type; Zygnemataceae |
| url | https://doi.org/10.1594/PANGAEA.833387 |