Geographic variation in seed-setting by heather (Calluna vulgaris (L.) Hull) in the Scottish Highlands

The full text article is temporarily unavailable.

We apologise for the inconvenience. Please try again later.

Download / Buy Article:

Abstract:

Aim

To assess the influence of oceanicity, altitude and latitude on spatial and temporal variations in the fecundity of heather (Calluna vulgaris (L.) Hull) in Scotland.Location

Mountain study areas located throughout the Highlands of Scotland.Methods

Seed-set was assessed as the number of seeds per heather capsule. At each mountain, the mean number of seeds per capsule was recorded at five sites spaced at 150 m height intervals up to heather’s upper altitudinal limit. Germinability was measured by incubating seeds at 20 °C after chilling at 2–3 °C for 6 weeks. Collateral cultivation of heather cuttings taken from sites below 450 m and above 900 m determined whether seed-setting and germinability were under genetic or environmental control.Results

Neither seed-setting nor germinability was under genetic control. Seed-setting generally declined with increasing site oceanicity and altitude but the effect of latitude was ill-defined. Mean maximum temperature and total rainfall during August–September were the principal environmental controls. Germinability varied less widely but tended to be least towards heather’s upper altitudinal limit.Main conclusions

Seed-setting by heather varied in both space and time, depending mainly on late summer warmth. It was always copious below about 600 m but was sparse or even failed altogether on higher ground, particularly in the hyperoceanic west Highlands.

Keywords: Calluna vulgaris; Scotland; Seed-setting; altitude; germinability; heathland; oceanicity

Document Type: Miscellaneous

Publication date: August 1, 2001

Related content

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more