To see accurate pricing, please choose your delivery country.
 
 
United States
£ GBP
All Shops
We're still open for business - read our Brexit and Covid-19 statements

British Wildlife

8 issues per year 84 pages per issue Subscription only

British Wildlife is the leading natural history magazine in the UK, providing essential reading for both enthusiast and professional naturalists and wildlife conservationists. Published eight times a year, British Wildlife bridges the gap between popular writing and scientific literature through a combination of long-form articles, regular columns and reports, book reviews and letters.

Subscriptions from £40 per year

Conservation Land Management

4 issues per year 44 pages per issue Subscription only

Conservation Land Management (CLM) is a quarterly magazine that is widely regarded as essential reading for all who are involved in land management for nature conservation, across the British Isles. CLM includes long-form articles, events listings, publication reviews, new product information and updates, reports of conferences and letters.

Subscriptions from £18 per year
Academic & Professional Books  Palaeontology  Palaeobotany

The Holocene Vegetational Development of the Godthåbsfjord Area, West Greenland

Monograph
By: Bent Fredskild(Author)
28 pages, illustrations
The Holocene Vegetational Development of the Godthåbsfjord Area, West Greenland
Click to have a closer look
  • The Holocene Vegetational Development of the Godthåbsfjord Area, West Greenland ISBN: 9788763511537 Paperback Jan 1983 Usually dispatched within 1-2 weeks
    £14.99
    #212211
Price: £14.99
About this book Customer reviews Related titles

About this book

Holocene pollen and macrofossil diagrams from four low arctic lakes at Godthabsfjord are presented. Each core has been divided into radiocarbon-dated palaeovegetation zones, based on the remnants of terrestric plants. The PV zones are physiognomically similar, but differences as to the composition and frequency of species can be seen between the two lakes in the interior and the two lakes fronl the outer coast area. The vegetation which invaded the deglaciated soil was open but rich in species, and 64 species or genera have been determined from the pioneer stage (c. 9400-8000 B.P.). Open soil plants were dominating, but dwarf-shrubs entered the vegetation, with species from snow-patches and snow-covered heaths dominating in the beginning. By c. 8000 B.P. Salix glauca and S. herbacea immigrated, and gradually the pioneer plants and chionophilous dwarf-shrubs were decimated. This Salix-Cyperaceae stage lasted until c. 6300 B.P., when Betula nana spread all over the area within a few centuries. A Betula nana-Juniperus stage lasted until c. 3500 B.P. In the subcontinental interior this was followed by an Alnus crispa-Betula nana stage, which in turn was replaced by a Betula nana-Ericales stage around 1800 B.P. Alnus has never been able to grow at the maritime outer coast, where Betula, Cyperaceae, Empetrum and other Ericales dominated after c. 3500 B.P. Later on, Empetrum, Cyperaceae and snowbed plants gradually spread at the expence of Betula nana.

After the deglaciation the temperature increased, reaching today's values between 8000 and 7500 B.P. At which time during the coming millennia the temperature curve peaked is not known, but it may have been fairly late, presumably during the Betula nana-Juniperus stage. Major climatic changes are registered in the interior at 3900-3600 and 1800 B.P., and at the outer coast at c. 3600 and 2500-2000 B.P.

From around 8000 B.P. the development of the lakes is fairly independent of the physical conditions of the surroundings, being dependent mainly on the trophic stages of the lakes. These pass through a succession: highly productive, eutrophic -less productive, mesotrophic -very poor, oligotrophic. As well as in the flora and fauna, these stages are reflected in the sediment, which at the beginning was a clay gyttja followed by a jelly-like gyttja and, finally, by a loose, watery gyttja consisting mainly of precipitated humus. Chemical analyses of one of the cores confirnl the oligotrophication.

The pollen influx in the pioneer stage is less than 100 grains per cm2 per year, increasing during the Hypsithermal to c. 300 in three of the lakes and c. 1000 in the richest one, but since then the influx decreases somewhat upwards.

A survey of the immigration or first appearance of some species palynologically important to South and West Greenland shows big time lags in the spreading of some species, e.g. Thalictrum and Angelica, whereas others, like Empetrum and Juniperus, have a more effective dispersal capacity.

Customer Reviews

Monograph
By: Bent Fredskild(Author)
28 pages, illustrations
Current promotions
British WildlifeHarper Collins PublishersSeabirds The New Identification GuideOrder your free copy of our 2021 equipment catalogues