An Analysis of Modern Pollen Rain on an Elevational Gradient in Southern Peru

The sensitivity of pollen as an indicator of elevation in neotropical lowland and Andean forests was measured using modern pollen samples collected from moss-polsters along a transect between 340 m and 3530 m elevation and from surface sediments in lowland swamps (240 m) of Madre de Dios, Peru. A bl...

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Bibliographische Detailangaben
Veröffentlicht in:	Journal of Tropical Ecology. - Cambridge University Press, 1985. - 20(2004), 1, Seite 113-124
1. Verfasser:	Weng, Chengyu (VerfasserIn)
Weitere Verfasser:	Bush, Mark B., Silman, Miles R.
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2004
Zugriff auf das übergeordnete Werk:	Journal of Tropical Ecology
Schlagworte:	Andes Elevation Moss Polster Palaeoecology Peru South America Transect Biological sciences Physical sciences


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041			\|a eng
100	1		\|a Weng, Chengyu \|e verfasserin \|4 aut
245	1	3	\|a An Analysis of Modern Pollen Rain on an Elevational Gradient in Southern Peru
264		1	\|c 2004
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520			\|a The sensitivity of pollen as an indicator of elevation in neotropical lowland and Andean forests was measured using modern pollen samples collected from moss-polsters along a transect between 340 m and 3530 m elevation and from surface sediments in lowland swamps (240 m) of Madre de Dios, Peru. A blind study, using samples collected from the same transect in the following year, provided a test of reproducibility. The results show (1) clear elevational distribution patterns and (2) the ability of calibration data to predict the altitude of the blind samples. Characteristic associations of pollen taxa are found under differing hydrologies and elevations. The floodplain pollen assemblages are characterized by abundant Mauritia, Sloanea, Ficus, Iriartea and Arecaceae pollen types. At higher elevations, these lowland types decrease or are absent. Alchornea, Urticaceae/Moraceae, Bignoniaceae and Cecropia are dominant components of the pollen rain of the low-elevation zone (< 1000 m). Acalypha, Alchornea, Cecropia, Rubiaceae and Urticaceae/Moraceae are important between 1000 m and 1600 m elevation. Pollen of Hedyosmum, Alnus, Poaceae and Combretaceae/Melastomataceae are abundant between 1600 m and 2000 m. Cecropia pollen dominates samples from low- to mid-elevation disturbed forests. Alnus pollen is most abundant, and Poaceae becomes rare, between 2000 and 2700 m. At high elevations above 2700 m, Asteraceae, Poaceae, Polylepis, Muehlenbeckia-type and Myrsine pollen are dominant. Statistical analysis of the data set using Detrended Correspondence Analysis (DCA) shows a precise correlation between community composition and elevation. The DCA axis 1 values are strongly correlated with sample elevation, exhibiting a linear relationship $(r^2 = 0.904)$ . The results provide an estimate of the sensitivity of pollen analysis in the Neotropics as a proxy for measuring elevation and, by inference, temperature.
540			\|a Copyright 2004 Cambridge University Press
650		4	\|a Andes
650		4	\|a Elevation
650		4	\|a Moss Polster
650		4	\|a Palaeoecology
650		4	\|a Peru
650		4	\|a South America
650		4	\|a Transect
650		4	\|a Biological sciences \|x Biology \|x Botany \|x Palynology \|x Pollen
650		4	\|a Physical sciences \|x Earth sciences \|x Geography \|x Geomorphology \|x Topography \|x Lowlands
650		4	\|a Biological sciences \|x Biology \|x Biological taxonomies \|x Taxa
650		4	\|a Physical sciences \|x Earth sciences \|x Geography \|x Land \|x Rangelands \|x Wetlands \|x Swamps
650		4	\|a Biological sciences \|x Biology \|x Botany \|x Plant ecology \|x Vegetation
650		4	\|a Biological sciences \|x Ecology \|x Population ecology \|x Synecology \|x Biocenosis \|x Plant communities \|x Forests \|x Cloud forests
650		4	\|a Biological sciences \|x Ecology \|x Population ecology \|x Synecology \|x Biocenosis \|x Plant communities \|x Forests \|x Montane forests
650		4	\|a Biological sciences \|x Biology \|x Botany \|x Plant ecology \|x Forest ecology
650		4	\|a Physical sciences \|x Earth sciences \|x Geology \|x Petrology \|x Sedimentary petrology \|x Sediments
650		4	\|a Biological sciences \|x Biology \|x Botany \|x Plant ecology \|x Forest ecology \|x Forest ecosystems \|x Forest habitats
655		4	\|a research-article
700	1		\|a Bush, Mark B. \|e verfasserin \|4 aut
700	1		\|a Silman, Miles R. \|e verfasserin \|4 aut
773	0	8	\|i Enthalten in \|t Journal of Tropical Ecology \|d Cambridge University Press, 1985 \|g 20(2004), 1, Seite 113-124 \|w (DE-627)266015972 \|w (DE-600)1466679-0 \|x 14697831 \|7 nnns
773	1	8	\|g volume:20 \|g year:2004 \|g number:1 \|g pages:113-124
856	4	0	\|u https://www.jstor.org/stable/4091890 \|3 Volltext
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