Considerazioni sull'origine della flora e sull'oscillazione dei piani di vegetazione delle Alpi Apuane

Ferrarini, Erminio

doi:10.21426/b61110512

Cited by 2 publications

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“…This Prior to this study, several palynological studies were known from sites in the northern Apennines. but in some cases (for example, Chiarugi 1936Chiarugi , 1950Ferrarini 1962Ferrarini , 1981Bertolani-Marchetti, 1963;Braggio Morucchio, Guido & Montanari, 1975. 1978Bertolani-Marchetti et al, 1994) the resolution of pollen diagrams is low, and the reliability of field and laboratory methods is uncertain (Watson, Branch & Lowe, 1994).…”

Section: Clirnate and Vegetationmentioning

confidence: 99%

The vegetational history of the northern Apennines, Italy: information from three new sequences and a review of Regional vegetational change

Watson

1996

Journal of Biogeography

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Abstract. The results of pollen analysis and radiocarbon dating are presented from three northern Apennine sequences; Lago Padule in northern Tuscany and Lago Pratignano and Ospitale in the Emilia‐Romagnan Apennines. This is the first detailed pollen stratigraphic information from sites in Emilia‐Romagna and north Tuscany and extends eastwards the area from which information on vegetational history is available. The sequence from Lago Padule is one of the most complete Holocene records known from the northern Apennine region. Lago Pratignano has the deepest sequence of organic sediments (1544 cm) and the fastest rates of sediment accumulation (up to 28 cm per 100 years) providing the highest resolution record for the mid to late Holocene periods in the region. High rates of sedimentation have also occurred at Ospitale where organic sediments are 780 cm deep and began to form at approximately 5500 bp. The record from Lago Padule is compared with Holocene records from two nearby sites and a series of Regional Pollen Assemblage Zones is defined for the eastern area of the northern Apennines. The main features of vegetational change identified are: (i) a‘pioneer’phase of rapid forest development during the early Holocene followed by the establishment of an upper forest belt dominated by Abies, and a belt of mixed deciduous forest at lower altitudes; (ii) the appearance and rapid expansion of Fagus between approximately 5200 bp and 2900 bp forming a mixed Abies‐Fagus association in the upper forest belt; and (iii) the overall reduction of forest cover, and dominance of Fagus in the arboreal vegetation from around 2900 bp. The scheme of Regional PAZs for the eastern area is used as a framework for the review of pollen stratigraphic information and radiocarbon dates from other sites in the northern Apennine region. Characteristics of pollen records which can be identified in sequences from across the region are identified and the chronology of similar changes in pollen stratigraphy is examined. The scheme of four regional PAZs for the Holocene period is shown to be valid for the entire northern Apennine region. The examination of a series of pollen records shows that Fagus appeared earlier in the western than the eastern part of the region during the mid Holocene and became dominant in the northern Apennine forests post 3000 bp. The impact of anthropogenic activity and climatic change on the spread and development of Fagus are discussed. The palynological evidence which is now available from the northern Apennines is compared with information for the region shown in the‘European pollen maps’of Huntley & Birks (1983). This study provides an updated review of the representation of different tree taxa in Holocene pollen records from the northern Apennines and illustrates the role of the northern Apennines as a refugium for trees during the Wurmian Lateglacial.

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Section: Clirnate and Vegetationmentioning

confidence: 99%

The vegetational history of the northern Apennines, Italy: information from three new sequences and a review of Regional vegetational change

Watson

1996

Journal of Biogeography

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“…This climate, together with the peculiar geographical and geological features of the Alpi Apuane area, explain the occurrence of a very rich and diverse flora as well as its role as a refugium for numerous endemic species (Ferrarini, 1970). From the Tyrrhenian coastal zone towards the first significant relief, the vegetation cover is Mediterranean; Quercus ilex , Myrtus communis , Pistacia terebinthus and Phillyrea latifolia are largely present, especially in calcareous soil, up to about 300 m a.s.l.…”

Section: Study Sitementioning

confidence: 99%

Palynological evidence of Middle Pleistocene palaeoenvironmental changes from the ‘Buca dell’Onice’ flowstone (Alpi Apuane, Central Italy)

Bertini

Piccini

Ricci

et al. 2021

The Depositional Record

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Buca dell'Onice di Monte Girello is a small cave located in the Alpi Apuane (central Italy). It preserves an exceptionally thick flowstone deposited intermittently during the Middle Pleistocene. Two main depositional cycles, separated by a physical discontinuity, have been recognised and described. This discontinuity and the top surface of the flowstone attest to two main phases of interrupted growth related to palaeoenvironmental and palaeoclimate changes. Pilot palynological investigations support the existence of such changes. Despite the high number of barren pollen samples and the overall very low concentration of pollen grains per gram of sediment, palynology furnishes some interesting insights especially regarding floral composition, vegetation cover and local to regional climate. The pollen record also contributes to the definition of the stratigraphic distribution of taxa no longer growing in this area (i.e. Carya and Picea). According to the pollen assemblage characteristic of arboreal vegetation cover, the flowstone was deposited predominantly during humid phases under both warm and cool climate conditions (interglacials/interstadials and at the end of interglacials). The warm and cool phases correspond, respectively, to increases of mixed thermophilous forest taxa and montane arboreal taxa. On the other hand, the pollen record does not show the major expansion of open vegetation associated with the coldest and driest conditions, which apparently fall at the main middle discontinuity and at the top interruption of the flowstone. Previous data permit changes in precipitation to be identified as one of the major limiting factors for the growth of this flowstone, probably in a period including MISs 13-10. The more significant lithological features of the flowstone as well as the vegetal and climate signatures suggest that its development principally represents a response to global events including teleconnections active between the Mediterranean and the Atlantic circulation, with minor contribution from local factors.

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Considerazioni sull'origine della flora e sull'oscillazione dei piani di vegetazione delle Alpi Apuane

Cited by 2 publications

References 0 publications

The vegetational history of the northern Apennines, Italy: information from three new sequences and a review of Regional vegetational change

The vegetational history of the northern Apennines, Italy: information from three new sequences and a review of Regional vegetational change

Palynological evidence of Middle Pleistocene palaeoenvironmental changes from the ‘Buca dell’Onice’ flowstone (Alpi Apuane, Central Italy)

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