D³ database

Diaspore Size

Summary

 

DIASPORE SIZE quantifies the size of diaspores (in mm) in three perpendicular axes: length, width and height.

 

 

Trait description

 

DIASPORE SIZE is coded in three continuous variables that represent the three perpendicular axes (length, width and height, given in mm), at which length is the longest and height the shortest dimension (see Tab. 1 and Fig. 1). Typical values range between 0.1 to 500 mm. If more than one measurement was available, generally only the mean value is presented. Raw data are available on request.

 

Tab. 1. Continuous variables related to DIASPORE SIZE.

No.

Variable name

Unit

Description

1

DIA_LENGTH

mm

Length of the diaspore, i.e. the longest axis, which is measured including all appendages.

2

DIA_WIDTH

mm

Width of the diaspore, i.e. the second longest axis, which is measured perpendicular to length and includes all appendages.

3

DIA_HEIGHT

mm

Height of the diaspore, i.e. the shortest axis, which is measured perpendicular to length and width and includes all appendages.

Fig. 1. DIASPORE SIZE of dandelion (Taraxacum Sect. Ruderalia).

 

 

Data sources

 

The presented data refer to the size of the diaspore including all appendages. The original measurements of diaspores or respective images do not overlap with databases like LEDA or BIOPOP. Additionally, data published by Müller-Schneider (1986) are included.

 

 

Literature

 

Götzenberger, L. (2005). Seed weight and seed shape. In: Knevel, I.C., Bekker, R.M., Kunzmann, D., Stadler, M., Thompson, K. (eds.): The LEDA traitbase - Collecting and measuring standards of life-history traits of the Northwest European Flora. Pages 101-104. LEDA Traitbase Project, University of Groningen.

 

Hegi, G. (1908ff): Illustrierte Flora von Mittel-Europa. Mit besonderer Berücksichtigung von Deutschland, Oesterreich und der Schweiz. Zahlreiche Bände in drei Auflagen. J. F. Lehmanns Verlag, 2. und 3. Auflage bei Paul Parey und Weissdorn-Verlag.

 

Müller-Schneider, P. (1977): Verbreitungsbiologie (Diasporologie) der Blütenpflanzen. Veröffentlichungen des Geobotanischen Institutes der ETH, Stiftung Rübel, 61.

 

Müller-Schneider, P. (1986): Verbreitungsbiologie der Blütenpflanzen Graubündens. Veröffentlichungen des Geobotanischen Institutes der ETH, Stiftung Rübel, 85.

 

Moles, A.T., Ackerly, D.D., Tweddle, J.C., Dickie, J.B., Smith, R., Leishman, M.R., Mayfield, M.M., Pitman, A., Wood, J.T. & Westoby, M. (2007): Global patterns in seed size. Global Ecology and Biogeography 16, 109-116.