Morphological variation within the diatom taxon Cyclotella comensis and its importance for quantitative temperature reconstructions

Hausmann, Sonja; Lotter, André F. (2001). Morphological variation within the diatom taxon Cyclotella comensis and its importance for quantitative temperature reconstructions. Freshwater Biology, 46(10), pp. 1323-1333. Wiley 10.1046/j.1365-2427.2001.00752.x

[img] Text
FreshwaterBiol_46_1323.pdf - Published Version
Restricted to registered users only
Available under License Publisher holds Copyright.

Download (694kB) | Request a copy

1. The morphologically complex taxon Cyclotella comensis Grunow had no clear relationship with environmental parameters in a study using sediment surface samples from the Swiss Alps. The morphological heterogeneity of the taxon was investigated by applying a principal component analysis (PCA) to 9000 presence/absence descriptions of valves from surface samples of six lakes from different altitudes (15 characteristics, 100 valves each lake). The PCA allowed the classification of six morphs, which differed mainly in size and length of striae. Photographs of the morphs are shown in this paper. 2. Sixty-eight sediment surface samples were analysed using these newly defined six morphs. Summer temperature explained a major part of the variance between the morphs as assessed by a redundancy analysis (RDA). Summer temperature optima and tolerances were estimated using weighted averaging. 3. The influence of the revised C. comensis taxonomy on the diatom inferred summer temperature of a high alpine lake is discussed in a multiproxy context for the past 800 years.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Palaeoecology
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)

UniBE Contributor:

Lotter, André F.

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

0046-5070

Publisher:

Wiley

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

02 Jun 2016 08:12

Last Modified:

02 Jun 2016 08:12

Publisher DOI:

10.1046/j.1365-2427.2001.00752.x

BORIS DOI:

10.7892/boris.81034

URI:

https://boris.unibe.ch/id/eprint/81034

Actions (login required)

Edit item Edit item
Provide Feedback