Palynology of the Middle Part (30-78 Metres) of the 120 M Deep Section in Northern Greece (Macedonia)

Wijmstra, T.A.; Smit, A.

doi:10.1111/j.1438-8677.1976.tb00241.x

Cited by 154 publications

(72 citation statements)

References 9 publications

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“…The older age was calibrated using the calibration curve proposed by Hughen et al (2005). Table 2 Proposed local geologic-climatic units for Urmia sequence correlated with two long terrestrial sequences of Greece (Wijmstra, 1969;Wijmstra and Smit, 1976;Wijmstra, 1987a,1987b;Tzedakis, 1993Tzedakis, , 1994Tzedakis, , 1999. …”

Section: Resultsmentioning

confidence: 99%

“…A number of these records have been studied in Southern Europe over the last few decades (Wijmstra, 1969;Wijmstra and Smit, 1976;Woillard, 1978;de Beaulieu and Reille, 1984, van der Wiel and Wijmstra, 1987a,1987bFollieri et al, 1988;Tzedakis, 1993Tzedakis, , 1994Tzedakis, , 1999. These records have been correlated successfully to marine isotope stages and orbital parameters (Tzedakis et al, 1997;Magri and Tzedakis, 2000;de Beaulieu et al, 2001;Tzedakis, 2005).…”

Section: Introductionmentioning

confidence: 99%

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A late Pleistocene long pollen record from Lake Urmia, Nw Iran

et al. 2008

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A palynological study based on two 100-m long cores from Lake Urmia in northwestern Iran provides a vegetation record spanning 200 ka, the longest pollen record for the continental interior of the Near East.During both penultimate and last glaciations, a steppe of Artemisia and Poaceae dominated the upland vegetation with a high proportion of Chenopodiaceae in both upland and lowland saline ecosystems. While Juniperus and deciduous Quercus trees were extremely rare and restricted to some refugia, Hippophaë rhamnoides constituted an important phanerophyte, particularly during the upper last glacial sediments. A pronounced expansion in Ephedra shrub-steppe occurred at the end of the penultimate late-glacial period but was followed by extreme aridity that favoured an Artemisia steppe. Very high lake levels, registered by both pollen and sedimentary markers, occurred during the middle of the last glaciation and upper part of the penultimate glaciation. The late-glacial to early Holocene transition is represented by a succession of Hippophaë, Ephedra, Betula, Pistacia and finally Juniperus and Quercus. The last interglacial period (Eemian), slightly warmer and moister than the Holocene, was followed by two interstadial phases similar in pattern to those recorded in the marine isotope record and southern European pollen sequences.1 This work is dedicated to Sytze Bottema for his outstanding contribution to late Quaternary palynology of the Near East.2

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A late Pleistocene long pollen record from Lake Urmia, Nw Iran

et al. 2008

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“…As mentioned earlier, although the Bueu period presents a striking prominent expansion of deciduous trees as large as the Pontevedra period, the virtual absence of most of the Mediterranean taxa during the maximum expansion of deciduous oak and the large development of Fagus and Carpinus indicate that the Bueu climatic amelioration is weaker than that of the Pontevedra. Such relative difference of forest extent and climatic amelioration between the three forested periods are commonly recognized in the long Southern European pollen sequences Tenaghi Philippon (Tzedakis et al, 2003;Wijmstra and Smit, 1976) and Praclaux (Reille and de Beaulieu, 1995;Reille et al, 2000) and the SW Iberian margin pollen record MD01-2443 (Tzedakis et al, 2004b;Roucoux et al, 2006). In a review of the long Southern European pollen records, Tzedakis (2005) pointed out a broad correspondence between ice volume and Southern European forest changes over the previous glacial cycles.…”

Section: The Major Open Vegetation Intervals In Nw Iberiamentioning

confidence: 88%

Millennial-scale climatic variability between 340 000 and 270 000 years ago in SW Europe: evidence from a NW Iberian margin pollen sequence

et al. 2009

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Abstract.We present a new high-resolution marine pollen record from NW Iberian margin sediments (core MD03-2697) covering the interval between 340 000 and 270 000 years ago, a time period centred on Marine Isotope Stage (MIS) 9 and characterized by particular baseline climate states. This study enables the documentation of vegetation changes in the north-western Iberian Peninsula and therefore the terrestrial climatic variability at orbital and in particular at millennial scales during MIS 9, directly on a marine stratigraphy. Suborbital vegetation changes in NW Iberia in response to cool/cold events are detected throughout the studied interval even during MIS 9e ice volume minimum. However, they appear more frequent and of higher amplitude during the 30 000 years following the MIS 9e interglacial period and during the MIS 9a-8 transition, which correspond to intervals of an intermediate to high ice volume and mainly periods of ice growth. Each suborbital cold event detected in NW Iberia has a counterpart in the Southern Iberian margin SST record. High to moderate amplitude cold episodes detected on land and in the ocean appear to be related to changes in deep water circulation and probably to iceberg discharges at least during MIS 9d, the mid-MIS 9c cold event and MIS 9b. This work provides therefore additional evidence of pervasive millennial-scale climatic variability in the North Atlantic borderlands throughout past climatic cycles of the Late Pleistocene, regardless of glacial state. However, ice volume might have an indirect influence on the amplitude of the millennial climatic changes in Southern Europe.

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“…1). Arboreal pollen (AP) records are excluded of Pinus, Juniperus, and Betula ; the record from Tenaghi Philippon is based on pollen data from Wijmstra (1969) and Wijmstra and Smit (1976) and the age model from Tzedakis et al (2006) (see also Sadori et al, 2016). Red bars and black dots at the bottom age axis indicate tephrochronological tie points and tuning points used for the age model of the DEEP site sequence .…”

Section: Sub-orbital Changesmentioning

confidence: 99%

The environmental and evolutionary history of Lake Ohrid (FYROM/Albania): interim results from the SCOPSCO deep drilling project

et al. 2017

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Abstract. This study reviews and synthesises existing information generated within the SCOPSCO (Scientific Collaboration on Past Speciation Conditions in Lake Ohrid) deep drilling project. The four main aims of the project are to infer (i) the age and origin of Lake Ohrid (Former Yugoslav Republic of Macedonia/Republic of Albania), (ii) its regional seismotectonic history, (iii) volcanic activity and climate change in the central northern Mediterranean region, and (iv) the influence of major geological events on the evolution of its endemic species. The Ohrid basin formed by transtension during the Miocene, opened during the Pliocene and Pleistocene, and the lake established de novo in the still relatively narrow valley between 1.9 and 1.3 Ma. The lake history is recorded in a 584 m long sediment sequence, which was recovered within the framework of the International Continental Scientific Drilling Program (ICDP) from the central part (DEEP site) of the lake in spring 2013. To date, 54 tephra and cryptotephra horizons have been found in the upper 460 m of this sequence. Tephrochronology and tuning biogeochemical proxy data to orbital parameters revealed that the upper 247.8 m represent the last 637 kyr. The multi-proxy data set covering these 637 kyr indicates longterm variability. Some proxies show a change from generally cooler and wetter to drier and warmer glacial and interglacial periods around 300 ka. Short-term environmental change caused, for example, by tephra deposition or the climatic impact of millennial-scale Dansgaard-Oeschger and Heinrich events are superimposed on the long-term trends. Evolutionary studies on the extant fauna indicate that Lake Ohrid was not a refugial area for regional freshwater animals. This differs from the surrounding catchment, where the mountainous setting with relatively high water availability provided a refuge for temperate and montane trees during the relatively cold and dry glacial periods. Although Lake Ohrid experienced significant environmental change over the last 637 kyr, preliminary molecular data from extant microgastropod species do not indicate significant changes in diversification rate during this period. The reasons for this constant rate remain largely unknown, but a possible lack of environmentally induced extinction events in Lake Ohrid and/or the high resilience of the ecosystems may have played a role.

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Palynology of the Middle Part (30-78 Metres) of the 120 M Deep Section in Northern Greece (Macedonia)

Cited by 154 publications

References 9 publications

A late Pleistocene long pollen record from Lake Urmia, Nw Iran

A late Pleistocene long pollen record from Lake Urmia, Nw Iran

Millennial-scale climatic variability between 340 000 and 270 000 years ago in SW Europe: evidence from a NW Iberian margin pollen sequence

The environmental and evolutionary history of Lake Ohrid (FYROM/Albania): interim results from the SCOPSCO deep drilling project

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