Recent Pollen Spectra in two Small Mountain Basins of the Ligurian Apennines (Northern Italy)

Montanari, Carlo Alessandro

doi:10.1080/00173138909427443

Cited by 10 publications

(8 citation statements)

References 3 publications

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“…II nostro lavoro rappresenta un contributo da affiancare ad altri precedentemente condotti sui territorio italiano (BERTOLANI MARCHETTI et al, 1977;BRAGGIO MORUCCHIO et al, 1978;Gumo et al, 1979;AROBBA et al, 1986;MoNTANARI, 1989;MANZINI et al, 1990;CARAMmLLo et al, 1991) dai quali, tuttavia, si discosta almeno parzialmente in quanto 1' attenzione e posta piu direttamente sulla relazione che intercorre fra i rilievi floristico-quantitativi e la deposizione pollinica delle piante che vivono nelle aree torbose.…”

Section: Scheuchzerio-cariceteaunclassified

“…E stato calcolato l'indice di rappresentativita R/P (HEIM, 1970;MoNTANARI, 1989), doveR rappresenta il valore medio percentuale di abbondanza-dominanza (copertura) dei rilievi all'interno di ogni tipologia vegetazionale, assumendo: +=0.5%; 1=3%; 2=15%; 3=37.5%; 4 =62.5%; 5 = 87.5% (MoNTANARI, 1989). Peril Lago del Greppo, date le modeste dimensioni della torbiera (500 m 2 ) e dell'intero lago (1700 m 2 ) si e anche calcolato l'indice mR/P e mR/mP, dove mR rappresenta il valore medio di abbondanza-dominanza calcolato su tutti i rilievi e corretto tenendo conto della percentuale di copertura totale all'interno di ogni tipologia vegetazionale e dell'estensione rdativa di ciascuna di queste; mP e Ia media delle percentuali polliniche nei diversi campioni.…”

Section: Materiau E Metod!unclassified

“…I 4 campioni (BC1-4), costituiti da cuscinetti di Sphagnum teres, sono stati prelevati in modo casuale all'interno del piano torboso (fig 1c, zona E) occupato dal Caricetum nigrae, ognuno al centro di un'area omogenea di almena 50m 2 in modo da permettere un raffronto tra copertura vegetale e percentuali polliniche (MONTANARI, 1989).…”

Section: Lago Bacciounclassified

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Indagini floristico-vegetazionali e actuopalinologiche sul Lago Baccio e sul Lago del Greppo (Appennino Tosco-Emiliano)

Raffaelli

Secci

Lippi

et al. 1997

Webbia

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Section: Scheuchzerio-cariceteaunclassified

Section: Materiau E Metod!unclassified

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Indagini floristico-vegetazionali e actuopalinologiche sul Lago Baccio e sul Lago del Greppo (Appennino Tosco-Emiliano)

Raffaelli

Secci

Lippi

et al. 1997

Webbia

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“…Hicks (1977) used one, Yazvenko (1991) used fi\'e or SIX. botb Montanari (1989) and Gaillard et a/. ( , 1994( ) used 10, and Birks (1977( , 1980) used a minimum of six.…”

Section: Implications For Moss Polster Studiesmentioning

confidence: 99%

“…Matthews, 1975 andCasetdine, 1989), of collecting moss polsters. Generally 5-10 moss subsamples have been combined but the precise numher varies considerably between studies (Adam &Mehrmger, l<)75; Birks, 1980;Delcourt & Pittillo, 1986;Casetdine, 1989;Montanari, 1989;Yazvenko, 1991;Gaillard et al 1992Gaillard et al , 1994, and little consideration has been given to the implications for the composition of the poUen spectra. Statistical techniques are used here to determine the number of subsamples that should be collected to reduce the effect of local variability to an acceptable level and to provide a relatively homogenous sample.…”

mentioning

confidence: 99%

Micro‐scale patterns of modern pollen deposition within three alpine plant communities*

Pardoe

1996

New Phytologist

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SUMMARYFew studies have examined patterns of pollen deposition or the relationship between vegetation and pollen assemblages at the small scale. This paper examines the representation of both individual taxa and whole plant communities in modern pollen spectra. Micro-scale variations in modern pollen deposition were studied in three alpine plant communities on Storbreen glacier foreland, southern Norway: a pioneer community; a 5a/ij:-shrub community; and an ericaceous heath community. The relationships between vegetation and modern pollen deposition and the variability of these relationships at the local scale were investigated within 16 >: I m^-quadrats. The data were classified using two-wa}-indicator-species ana]>'sis (TWINSPAN) and ordinated usin^ dftrendedcorrespondence analysis (DCA). In addition, the pollen and vegetation data were ordinated simultaneously, using canonical correspondence analysis (CCA). The efTect of removing arboreal pollen from the pollen sum was examined. The three plant communities were distinguished successfully by multivariate statistical techniques, using both pollen data and vegetation data. However, within the communities there was high variability in pollen deposition, which was most pronounced in the 5i3//s'-shrub community. The abundance of indi\ idual taxa in the vegetation was compared with their representation in the pollen spectra. The strongest relationships were shown by Salix, Ericales, Empetritm and Lycopodium. Certain taxa showed consistent, reproducible patterns of behaviour. These patterns provided valuable evidence for separating contrasting plant communities. Comparison of modern poiien-vegetation relationships of this kind with pollen data from Holocene and Pleistocene sites is important to improve the reconstruction of past plant communities. Statistical analyses showed that for the majority of taxa a moss polster consisting of 20 subsamples was necessary to reduce the effect of microscaie variability in this environment to acceptable levels.

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Pollen deposition in country villages of Eastern Liguria (Northern Italy)

Guido¹,

Montanari

Poggi

1992

Aerobiologia

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Recent pollen rain in 14 cotmoy villages of Ligmian hinteHand was examined, in the fi'amework of pollen deposition studies based upon moss polsters analysis, now in progress. The above mentioned localities are prevailingly situated in the Trebbia, A veto and Vara valleys, within 300 and 1000 m a.s.l. For each Iocali O, a moss sample was examined (two for Torriglia: north and south) consisting of several sub-samples fi'om various zones of the builtup area. All the samples have proved rich in pollen and provided spectra in accordance with qualitative and quantitative featttres of the urbanized areas vegetation and the spontaneous one of the neighbourhood. Sticking to general considerations, an attempt was made to compare the present results with those of the ci O, area of Genova, previously obtained ~4th the same methods'.

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Recent Pollen Spectra in two Small Mountain Basins of the Ligurian Apennines (Northern Italy)

Cited by 10 publications

References 3 publications

Indagini floristico-vegetazionali e actuopalinologiche sul Lago Baccio e sul Lago del Greppo (Appennino Tosco-Emiliano)

Indagini floristico-vegetazionali e actuopalinologiche sul Lago Baccio e sul Lago del Greppo (Appennino Tosco-Emiliano)

Micro‐scale patterns of modern pollen deposition within three alpine plant communities*

Pollen deposition in country villages of Eastern Liguria (Northern Italy)

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