Pollen representation and successional vegetation change on the sandstone plateau of Araracuara, Colombian Amazonia

Berrío, Juan Carlos; Arbeláez, M.V.; Duivenvoorden, Joost F.; Cleef, A.M.; Hooghiemstra, H.

doi:10.1016/s0034-6667(03)00083-6

Cited by 26 publications

(13 citation statements)

References 21 publications

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“…Pollen spectra have the potential to fill this gap, if the spatial and environmental characteristics of niche can be recognized in the pollen signal. Previous studies of modern pollen spectra from tropical forests in Central America (Horn & Ramirez 1990; Bush & Rivera 1998; Bush 2000), the Amazon lowlands (Salgado‐Labouriau 1979; Behling et al 1997; Bush et al 2001; Berrio et al 2003; Gosling et al 2005) and the Andes (Villagran et al 1981; Grabandt 1985; Weng et al 2004; Reese & Liu 2005) have shown the general sensitivity of this proxy to environmental gradients. However, no quantitative modern pollen studies exist that calibrate the pollen signal from Amazonian montane forests using empirical data on species distributional ranges directly measured in permanent vegetation plots.…”

Section: Introductionmentioning

confidence: 99%

Pollen-vegetation relationships along steep climatic gradients in western Amazonia

Urrego

Silman

Correa‐Metrio

et al. 2011

Journal of Vegetation Science

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Question: How accurately do Amazonian montane forest pollen spectra reflect the vegetation? Can compositional changes observed in the vegetation along environmental gradients be identified in the pollen spectra? How well do herbarium collection data and bioclimatic envelopes represent abundance changes along elevation gradients? Location: Amazonian montane forests, Peru. Methods: Moss polsters collected along five altitudinal transects spanning over 3000 m a.s.l. were used to characterize pollen spectra. Vegetation plot data from a network of 15 1‐ha permanent plots were used to correlate pollen spectra with present‐day vegetation. Probability density functions (PDFs) fitted to pollen and plot data allowed comparisons using Spearman correlation coefficients. Ordination analyses were used to summarize changes in pollen spectra. Correlations between pollen‐based PDFs and previously‐published herbarium collection PDFs were also evaluated. Results: Pollen spectra closely reflected changes in species composition along elevation gradients. A mid‐elevation shift in pollen spectra was identified using ordination analyses. Pollen spectra from the driest forest in our data set were statistically different from those of wet forests. Pollen abundance PDFs along the altitudinal gradient were significantly correlated (P<0.01) with PDFs fitted to plot abundance, basal area and herbarium collection data for ten out of 11 taxa analysed. Conclusions: Pollen spectra closely reflected the vegetation composition of Amazonian montane forests. The differentiation of pollen spectra from dry localities showed the potential of genus‐level pollen data to reflect precipitation gradients. Pollen spectra also reflected mid‐elevation compositional changes well along the lower elevation limit of ground cloud formation. Despite collection biases, herbarium‐based bioclimatic envelope PDFs also represented well forest compositional changes along elevation gradients.

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Section: Introductionmentioning

confidence: 99%

Pollen-vegetation relationships along steep climatic gradients in western Amazonia

Urrego

Silman

Correa‐Metrio

et al. 2011

Journal of Vegetation Science

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“…the representation indices of O. Davis () or the R‐value model of M. B. Davis (), have been used to indicate whether a taxon is over‐, under‐ or well represented in the modern pollen rain of a given vegetation type (Melief ; Berrio et al. ; Gosling et al. ; Rangel ; Olivera et al.…”

Section: Introductionmentioning

confidence: 99%

Representativeness of tree diversity in the modern pollen rain of Andean montane forests

Jantz

Homeier

Behling

2013

J Vegetation Science

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Questions: To assess the relationship between modern pollen rain and Andean montane forest vegetation for diversity, and provide a basis for interpretations of palaeoecological data in the northern Andes, we asked: (1) can the reduction of plant and pollen data to family level preserve information about diversity in both data sets; (2) how precisely do tree pollen and spore types represent richness patterns along an altitudinal gradient on tropical mountains; and (3) how similar are tree pollen and spore family richness in relationship to tree family richness?Location: Tropical montane rain forests, Podocarpus National Park in the Andes of South Ecuador (3°S, 79°W, 1000-3000 m a.s.l.). Methods:We analysed tree diversity and species composition in three different rain forest types: Premontane (PMF), lower montane (LMF) and upper montane (UMF). We investigated modern pollen rain using pollen traps. After testing the reliability of a taxonomic surrogacy on the plant data, we compared abundance and representation, as well as diversity of the two data sets at family level. This was done using rarefaction and Sørensen indices.Results: The correlation between tree species and families was high (r = 0.81, P < 0.001). Sample rarefaction on tree pollen and plant family data revealed highest pollen diversity on sites of the UMF, but highest tree diversity on LMF and PMF sites. The Sørensen indices indicate down-drift of pollen from higher altitudes in PMF and LMF and up-drift in UMF. Between 1% and 50% of pollen taxa of each sample originate from outside the plot.Conclusions: Taxonomic surrogacy at family level is a good tool for comparing presence-absence patterns of plant and pollen data in tropical regions with high tree diversity. On a family basis, pollen presence-absence data represent the corresponding tree vegetation data, but uncertainties increase with decreasing altitude. The higher diversity in pollen data of the UMF, but slightly lower diversity in the LMF and PMF, can at least partly be explained by wind patterns, local abundance of shrubs and herbs and differences in evenness.

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“…Scatter plots showing the relationship between modern pollen and plant percentages/abundances have been widely applied. Only a few studies have employed different indices (association, under and over‐representation) based on the presence and absence of taxa, to quantify various aspects of the pollen–vegetation relationship (Davis, 1984; Islebe & Hooghiemstra, 1995; Berrío et al. , 2003; Bunting, 2003).…”

Section: Introductionmentioning

confidence: 99%

Coastal dune vegetation and pollen representation in south Buenos Aires Province, Argentina

Fontana¹

2005

Journal of Biogeography

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Interpretation of Quaternary pollen assemblages can be improved by a better understanding of modern pollenvegetation relationships. Modern pollen deposition studies have shown that pollen assemblages reflect general patterns in the vegetation. However, pollen representation is biased by several factors, such as differences in pollen production, dispersal and preservation of taxa (Prentice, 1988). Thus, pollen abundance cannot be translated directly into plant abundance in the vegetation when interpreting pollen assemblages from the past. ABSTRACTAim To establish the relationship between coastal dune vegetation and its pollen representation as an aid to interpret Holocene vegetation dynamics and environmental changes from pollen assemblages.Location The study area is situated on the temperate Atlantic coast of south Buenos Aires Province, Argentina (c. 39°S and 61°20¢ W).Methods The vegetation of the active dune area adjacent to the beach was described on the basis of its floristic composition from 25 plots. Classification of the vegetation into distinct zones was carried out by cluster analysis. Surface samples were collected from each vegetation stand and analysed for their pollen composition. Pollen percentage data were analysed using principal components analysis in order to investigate the degree to which the different vegetation units can be distinguished by their pollen spectra. Pollen-vegetation relationships for selected taxa were explored using simple scatter plots and indices of association, under-and over-representation. Indices of floristic diversity and palynological richness were used to assess the representation of the vegetation in the pollen spectra.Results and conclusions Five vegetation zones are defined on the basis of species composition and their quantitative variation: back shore, mobile dunes, slacks, semi-fixed and fixed dunes. Pollen assemblages from back shore, mobile dunes and slacks are clearly differentiated from semi-fixed and fixed dunes. Pollen assemblages differ considerably from the associated vegetation composition. Major discrepancies are caused by large differences in pollen and vegetation proportion of Hyalis argentea and Discaria americana. There is a considerable proportion of non-local pollen in every spectrum. Pollen representation in the coastal dunes at Monte Hermoso is influenced by differences in pollen production, dispersal and preservation of individual taxa as well as by the spatial distribution of the vegetation, the topography of the dune system and the wind pattern. The pollen-vegetation relationship established in this study has important implication for understanding and interpreting fossil pollen records from coastal dune environments.

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Pollen representation and successional vegetation change on the sandstone plateau of Araracuara, Colombian Amazonia

Cited by 26 publications

References 21 publications

Pollen-vegetation relationships along steep climatic gradients in western Amazonia

Pollen-vegetation relationships along steep climatic gradients in western Amazonia

Representativeness of tree diversity in the modern pollen rain of Andean montane forests

Coastal dune vegetation and pollen representation in south Buenos Aires Province, Argentina

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