POSTGLACIAL HISTORY OF ALDER (ALNUS-GLUTINOSA (L) GAERTN) IN THE BRITISH-ISLES

被引：90

作者：

BENNETT, KD

BIRKS, HJB

机构：

[1] Subdepartment of Quaternary Research, Botany School, University of Cambridge, Cambridge, CB2 3EA, Downing Street

[2] Botanical Institute, University of Bergen, Bergen, N-5007

来源：

JOURNAL OF QUATERNARY SCIENCE | 1990年 / 5卷 / 02期

关键词：

Alnus glutinosa; British Isles; distribution change; pollen analysis; postglacial;

D O I：

10.1002/jqs.3390050204

中图分类号：

P9 [自然地理学];

学科分类号：

0705 ; 070501 ;

摘要：

Data from 92 postglacial pollen sequences are used to map the spread and increase of alder (Alnus glutinosa) across the British Isles between 9000 and 5000 years ago. The spread is found to be patchy and erratic in space and time. Consideration of the habitat requirements and reproductive ecology of alder suggest that it spread within Britain and Ireland after about 10 000 yr BP, when suitable habitat for it was scarce. Alder spread across most of Britain and Ireland early in the postglacial but only increased in abundance as (i) suitable habitat became available through changing sea levels, hydroseral successions, and floodplain development, and as (ii) rare weather events produced the necessary conditions for reproduction. Alder is unique among British and Irish trees in its requirement for a suitable habitat isolated among expanses of unsuitable habitats. Because of this, maps of its postglacial population spread and increase do not show the spatial coherence of maps for other forest tree taxa. Copyright © 1990 John Wiley & Sons, Ltd

引用

页码：123 / 133

页数：11

共 119 条

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