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Behling, H. &amp; Sch&uuml;ler, L. (2010): <b>Characteristics of Poaceae pollen grains as a tool to assess palaeoecological grassland dynamics in South America</b>. <i>Vegetation History and Archaeobotany</i> <b>20</b>, 97-108.

Resource Description

Title: Characteristics of Poaceae pollen grains as a tool to assess palaeoecological grassland dynamics in South America
FOR816dw ID: 1171
Publication Date: 2010-09-15
License and Usage Rights:
Resource Owner(s):
Individual: Hermann Behling
Contact:
Individual: Lisa Schüler
Contact:
Abstract:
During the Quaternary, in particular during<br/> glacial times, different grassland ecosystems played a<br/> much larger role and had a significantly larger distribution.<br/> Little is known yet about past development, biodiversity<br/> and dynamics of grassland ecosystems. In this innovative<br/> study, we attempt to distinguish between different South<br/> American grassland types in space and time based on<br/> morphological pollen grain characteristics of Poaceae. For<br/> this purpose[60?80 Poaceae pollen grains of 20 grassland<br/> samples were measured using their length, width and pore<br/> diameter as well as annulus width. Samples were taken<br/> from five sites in wet Pa´ramo vegetation from the Late<br/> Pleistocene to the Late Holocene in South Ecuador and<br/> from two sites in the south-eastern Brazilian highlands<br/> (Campos do Altitude) of the same period. Additionally, we<br/> investigated two samples from a Pampa site as well as six<br/> samples from one Campos grassland site in southern Brazil<br/> from the Late Pleistocene to the Late Holocene. Subsets of<br/> samples of the Campos grasslands and of the Pa´ramo were<br/> investigated in order to retrieve more detailed information<br/> on patterns within these vegetation types. Multivariate data<br/> analysis of the complete data set shows changes in taxonomic<br/> composition along an elevational gradient in the<br/> Pa´ramo grasslands. Our results reveal a highly dynamic<br/> development of the individual grassland types; they also<br/> provide interesting information on Poaceae taxa composition<br/> patterns, development and possibly changes in<br/> biodiversity within these ecosystems. Moreover, our data<br/> provide an indication about the origin and dynamics of the<br/> Campos ecosystems in the southern Brazilian highlands<br/> during the Late Pleistocene and the Holocene before and<br/> after the onset of human activities.
Keywords:
| biodiversity | grassland | South America | Poaceae | pollen grain morphology | grain size | Pampa |
Literature type specific fields:
ARTICLE
Journal: Vegetation History and Archaeobotany
Volume: 20
Page Range: 97-108
Publisher: Springer
ISSN: 0939-6314
Metadata Provider:
Individual: Nele Jantz
Contact:
Online Distribution:
Download File: http://www.lcrs.de/publications.do?citid=1171


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