Pollen productivity estimates for a pine woodland in eastern Scotland: The influence of sampling design and vegetation patterning
| Autor: | Chris Caseldine, Claire L. Twiddle, Richard T. Jones, Shinya Sugita |
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| Rok vydání: | 2012 |
| Předmět: |
Ecology
pollen productivity estimates Palaeontology Paleontology Sampling (statistics) Nearest neighbour pine woodland Woodland Vegetation medicine.disease_cause Productivity (ecology) Scotland Pollen Sampling design medicine Environmental science Physical geography Ecology Evolution Behavior and Systematics sample strategy |
| Zdroj: | Review of Palaeobotany and Palynology. 174:67-78 |
| ISSN: | 0034-6667 |
| DOI: | 10.1016/j.revpalbo.2011.12.006 |
| Popis: | article i nfo Quantitative vegetation reconstruction models have been developed to allow more faithful accounts of changes in vegetation structure to be attained. Widespread application of these models is encouraged, how- ever for this to be realised necessary parameter values, such as pollen productivity estimates require further investigation. This study shows results of tests undertaken to detect the influence of a homogenous vegeta- tion structure and sampling strategy upon the calculation of PPEs from contemporary data. Using a collection of contemporary moss samples, sub-groups were created using defined sampling strategies (random or sys- tematic) and nearest neighbour distance thresholds to investigate the influence of these conditions upon PPE generation. Results suggest that a random sampling strategy achieves the most reliable values, but using a systematic strategy is possible. Furthermore, in areas where vegetation patterning is non-stationary, a large degree of variation is incorporated into the values obtained, and the use of quantitative models in such situations could be problematic. |
| Databáze: | OpenAIRE |
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