An 11 000‐year record of vegetation and environment from Lago di Martignano, Latium, Italy
Identifieur interne : 002F07 ( Main/Exploration ); précédent : 002F06; suivant : 002F08An 11 000‐year record of vegetation and environment from Lago di Martignano, Latium, Italy
Auteurs : Martyn G. Kelly [Royaume-Uni, Nigeria] ; Brian Huntley [Royaume-Uni]Source :
- Journal of Quaternary Science [ 0267-8179 ] ; 1991-09.
Descripteurs français
- Wicri :
- geographic : Italie.
English descriptors
- KwdEn :
Abstract
A pollen diagram from Lago di Martignano, a maar lake in central Italy, provides an 11000‐year record of vegetation and environment change. The earliest pollen spectra are dominated by Artemisia and Gramineae, representing late glacial steppe vegetation typical of the Mediterranean region. Broad‐leaved forests were established by ca. 11 000 yr BP. Although Quercus initially dominated their canopy, a wide range of other mesophyllous trees were also present. Pollen values for sclerophyllous tree and shrub taxa characteristic of Mediterranean woodlands and scrub are initially low (<10%). After ca. 7000 yr BP, however, they begin to increase and rise to a peak of >40% of total land pollen at ca. 6700 yr BP, with Olea europaea the single most abundant taxon. Human influence upon the vegetation only becomes significant somewhat after this peak, with progressive clearance of woodland and expansion of herbaceous communities. Castanea sativa and luglans regia pollen is recorded consistently from the beginning of the rise in pollen values for taxa characteristic of Mediterranean scrub communities. Pollen values for arable crops increase progressively after ca. 5500 yr BP, following the peak pollen values for taxa characteristic of Mediterranean scrub vegetation. Late glacial and Holocene climate changes have been complex in this region, with the present character of the climate developing only during the last millennium. Rates of change of pollen spectra peak during this period.
Url:
DOI: 10.1002/jqs.3390060304
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Kelly</name><affiliation wicri:level="2"><country>Royaume-Uni</country><placeName><region type="country">Angleterre</region></placeName><wicri:cityArea>Environmental Research Centre, University of Durham, Department of Biological Sciences, South Road, Durham DH1 3LE</wicri:cityArea></affiliation><affiliation wicri:level="1"><country xml:lang="fr">Nigeria</country><wicri:regionArea>Current Address: Department of Botany, University of Jos, P.M.B. 2084, Jos</wicri:regionArea><wicri:noRegion>Jos</wicri:noRegion></affiliation></author><author><name sortKey="Huntley, Brian" sort="Huntley, Brian" uniqKey="Huntley B" first="Brian" last="Huntley">Brian Huntley</name><affiliation wicri:level="2"><country>Royaume-Uni</country><placeName><region type="country">Angleterre</region></placeName><wicri:cityArea>Environmental Research Centre, University of Durham, Department of Biological Sciences, South Road, Durham DH1 3LE</wicri:cityArea></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Quaternary Science</title><title level="j" type="abbrev">J. 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The earliest pollen spectra are dominated by Artemisia and Gramineae, representing late glacial steppe vegetation typical of the Mediterranean region. Broad‐leaved forests were established by ca. 11 000 yr BP. Although Quercus initially dominated their canopy, a wide range of other mesophyllous trees were also present. Pollen values for sclerophyllous tree and shrub taxa characteristic of Mediterranean woodlands and scrub are initially low (<10%). After ca. 7000 yr BP, however, they begin to increase and rise to a peak of >40% of total land pollen at ca. 6700 yr BP, with Olea europaea the single most abundant taxon. Human influence upon the vegetation only becomes significant somewhat after this peak, with progressive clearance of woodland and expansion of herbaceous communities. Castanea sativa and luglans regia pollen is recorded consistently from the beginning of the rise in pollen values for taxa characteristic of Mediterranean scrub communities. Pollen values for arable crops increase progressively after ca. 5500 yr BP, following the peak pollen values for taxa characteristic of Mediterranean scrub vegetation. Late glacial and Holocene climate changes have been complex in this region, with the present character of the climate developing only during the last millennium. Rates of change of pollen spectra peak during this period.</div></front></TEI><affiliations><list><country><li>Nigeria</li><li>Royaume-Uni</li></country><region><li>Angleterre</li></region></list><tree><country name="Royaume-Uni"><region name="Angleterre"><name sortKey="Kelly, Martyn G" sort="Kelly, Martyn G" uniqKey="Kelly M" first="Martyn G." last="Kelly">Martyn G. 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