Jantz, N.; Homeier, J. & Behling, H. (2014): <b>Representativeness of tree diversity in the modern pollen rain of Andean montane forests</b>. <i>Journal of Vegetation Science</i> <b>25</b>(2), 481-490.
Resource Description
Title:
Representativeness of tree diversity in the modern pollen rain of Andean montane forests
FOR816dw ID:
1276
Publication Date:
2014-02-01
License and Usage Rights:
PAK 823-825 data user agreement. (www.tropicalmountainforest.org/dataagreementp3.do)
Resource Owner(s):
Individual:
Nele Jantz
Contact:
email:
nele.jantz <at> biologie.uni-goettingen.de
Untere Karspüle 2
A.v.H.-Inst. für Pflanzenwiss.
Abt. Palynologie u. Klimadynamik
37073 Göttingen
Germany
Individual:
Jürgen Homeier
Contact:
email:
jhomeie <at> gwdg.de
Faculty of Resource Management
University of Applied Sciences and Arts (HAWK)
37077 Göttingen
Germany
Individual:
Hermann Behling
Contact:
email:
Hermann.Behling <at> bio.uni-goettingen.de
Department of Palynology and Climate Dynamics
Albrecht-von-Haller-Institute for Plant Sciences
University of Göttingen
Untere Karspüle 2
37073 Göttingen
Germany
Abstract:
Questions: To assess the relationship between modern pollen rain and Andean<br/>
montane forest vegetation for diversity, and provide a basis for interpretations of<br/>
palaeoecological data in the northern Andes, we asked: (1) can the reduction of<br/>
plant and pollen data to family level preserve information about diversity in both<br/>
data sets; (2) how precisely do tree pollen and spore types represent richness patterns<br/>
along an altitudinal gradient on tropical mountains; and (3) how similar<br/>
are tree pollen and spore family richness in relationship to tree family richness?<br/>
Location: Tropicalmontane rain forests, Podocarpus National Park in the Andes<br/>
of South Ecuador (3°S, 79°W, 1000–3000 ma.s.l.).<br/>
Methods:We analysed tree diversity and species composition in three different<br/>
rain forest types: Premontane (PMF), lowermontane (LMF) and uppermontane<br/>
(UMF).We investigated modern pollen rain using pollen traps. After testing the<br/>
reliability of a taxonomic surrogacy on the plant data, we compared abundance<br/>
and representation, as well as diversity of the two data sets at family level. This<br/>
was done using rarefaction and Sørensen indices.<br/>
Results: The correlation between tree species and families was high (r = 0.81,<br/>
P < 0.001). Sample rarefaction on tree pollen and plant family data revealed<br/>
highest pollen diversity on sites of the UMF, but highest tree diversity on LMF<br/>
and PMF sites. The Sørensen indices indicate down-drift of pollen from higher<br/>
altitudes in PMF and LMF and up-drift in UMF. Between 1% and 50% of pollen<br/>
taxa of each sample originate fromoutside the plot.<br/>
Conclusions: Taxonomic surrogacy at family level is a good tool for comparing<br/>
presence–absence patterns of plant and pollen data in tropical regions with high<br/>
tree diversity. On a family basis, pollen presence–absence data represent the corresponding<br/>
tree vegetation data, but uncertainties increase with decreasing altitude.<br/>
The higher diversity in pollen data of the UMF, but slightly lower diversity<br/>
in the LMF and PMF, can at least partly be explained by wind patterns, local<br/>
abundance of shrubs and herbs and differences in evenness.
Keywords:
| MATRIX |
Literature type specific fields:
ARTICLE
Journal:
Journal of Vegetation Science
Volume:
25
Issue:
2
Page Range:
481-490
Metadata Provider:
Individual:
Jürgen Homeier
Contact:
email:
jhomeie <at> gwdg.de
Faculty of Resource Management
University of Applied Sciences and Arts (HAWK)
37077 Göttingen
Germany
