Late Quaternary western Mediterranean pollen records and African winds

Magri, Donatella; Parra, Isabel Hidalgo

doi:10.1016/s0012-821x(02)00619-2

Cited by 119 publications

(83 citation statements)

References 29 publications

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“…Beyond this distance, the pollen percentages of Atlas cedars fall to <1% in sediment samples (Hajar et al, 2008). Magri and Parra (2002) have shown that Atlas cedar pollen grains may disperse to much greater distances from the originating population due to atmospheric circulation. However, these occurrences did not reach 1% of the total pollen sum in their samples.…”

Section: Resultsmentioning

confidence: 99%

Microrefugia, Climate Change, and Conservation of Cedrus atlantica in the Rif Mountains, Morocco

et al. 2017

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This study reconstructs and interprets the changing range of Atlas cedar in northern Morocco over the last 9,000 years. A synthesis of fossil pollen records indicated that Atlas cedars occupied a wider range at lower elevations during the mid-Holocene than today. The mid-Holocene geographical expansion reflected low winter temperatures and higher water availability over the whole range of the Rif Mountains relative to modern conditions. A trend of increasing aridity observed after 6,000 years BP progressively reduced the range of Atlas cedar and prompted its migration toward elevations above 1,400 masl. To assess the impact of climate change on cedar populations over the last decades, we performed a transient model simulation for the period between 1960 and 2010. Our simulation showed that the range of Atlas cedar decreased by about 75% over the last 50 years and that the eastern populations of the range in the Rif Mountains were even more threatened by the overall lack of water availability than the western ones. Today, Atlas cedar populations in the Rif Mountains are persisting in restricted and isolated areas (Jbel Kelti, Talassemtane, Jbel Tiziren, Oursane, Tidighine) that we consider to be modern microrefugia. Conservation of these isolated populations is essential for the future survival of the species, preserving polymorphisms and the potential for population recovery under different climatic conditions.

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Section: Resultsmentioning

confidence: 99%

Microrefugia, Climate Change, and Conservation of Cedrus atlantica in the Rif Mountains, Morocco

et al. 2017

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“…The lack of prominence of such an event in CC26 is surprising given its apparent widespread extent. Pollen records from Lago di Vico (Magri and Parra, 2002) suggest that in central Italy at ca. 8.1 kyr there is a prominent decrease in arboreal cover indicating drier conditions, which might be consistent with the minor δ 18 O reversal observed in the CC26 record at ca 8.3 kyr.…”

Section: Discussionmentioning

confidence: 99%

Enhanced rainfall in the Western Mediterranean during deposition of sapropel S1: stalagmite evidence from Corchia cave (Central Italy)

Zanchetta

Drysdale

Hellström

et al. 2007

Quaternary Science Reviews

217

202

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A stable isotope record from a stalagmite collected from Antro del Corchia cave (Apuan Alps, Central Italy), supported by 17 uranium-series ages, indicates enhanced regional rainfall between ca. 8.9 and 7.3 kyr cal. BP at the time of sapropel S1 deposition. Within this phase, the highest rainfall occurred between 7.9 and 7.4 kyr cal. BP. Comparison with different marine and lake records, and in particular with the Soreq Cave record (Israel), suggests substantial in-phase occurrence of enhanced rainfall between the Western and Eastern Mediterranean basins. There is no convincing evidence for major climatic change at the time of the "8.2 ka event".

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“…The main part of pollen flora recorded in the ODP Site 976 record, such as the all inclusive components of the Quercus deciduous and Mediterranean forests, probably originates from Spain as well as from Morocco while the presence of Cedrus in noticeable percentages definitively marks inputs from the south (Quézel and Médail, 2003;Quézel, 2002;Magri et al, 2002). This indicates that, in the Alboran area, pollen spectra correspond to a combination of north and south supplies (BoutRoumazeilles et al, 2007), making our pollen record a reliable synthetic picture of the regional vegetation changes from the whole Alboran Sea area.…”

Section: West Mediterranean Vegetation and Climate Changes Over The Lmentioning

confidence: 99%

Rapid climatic variability in the west Mediterranean during the last 25 000 years from high resolution pollen data

et al. 2009

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Abstract. High-temporal resolution pollen record from the Alboran Sea ODP Site 976, pollen-based quantitative climate reconstruction and biomisation show that changes of Mediterranean vegetation have been clearly modulated by short and long term variability during the last 25 000 years. The reliability of the quantitative climate reconstruction from marine pollen spectra has been tested using 22 marine core-top samples from the Mediterranean. The ODP Site 976 pollen record and climatic reconstruction confirm that Mediterranean environments have a rapid response to the climatic fluctuations during the last Termination. The western Mediterranean vegetation response appears nearly synchronous with North Atlantic variability during the last deglaciation as well as during the Holocene. High-resolution analyses of the ODP Site 976 pollen record show a cooling trend during the Bölling/Allerød period. In addition, this period is marked by two warm episodes bracketing a cooling event that represent the Bölling-Older Dryas-Allerød succession. During the Holocene, recurrent declines of the forest cover over the Alboran Sea borderlands indicate climate events that correlate well with several events of increased Mediterranean dryness observed on the continent and with Mediterranean Sea cooling episodes detected by alkenonebased sea surface temperature reconstructions. These events clearly reflect the response of the Mediterranean vegetation to the North Atlantic Holocene cold events.

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Late Quaternary western Mediterranean pollen records and African winds

Cited by 119 publications

References 29 publications

Microrefugia, Climate Change, and Conservation of Cedrus atlantica in the Rif Mountains, Morocco

Microrefugia, Climate Change, and Conservation of Cedrus atlantica in the Rif Mountains, Morocco

Enhanced rainfall in the Western Mediterranean during deposition of sapropel S1: stalagmite evidence from Corchia cave (Central Italy)

Rapid climatic variability in the west Mediterranean during the last 25 000 years from high resolution pollen data

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