Demographic patterns of seedling establishment and growth of native graminoids in an Alaskan tundra disturbance

Printer-friendly version
TitleDemographic patterns of seedling establishment and growth of native graminoids in an Alaskan tundra disturbance
Publication TypeJournal Article
Year of Publication1983
AuthorsGartner, BL, F Stuart Chapin III, Shaver, GR
JournalJournal of Applied Ecology
Volume20
Issue3
Pagination965-980
ISBN Number0021-8901
Accession NumberARC326
KeywordsGramineae D 04140 Taiga/tundra
Abstract

Presence or absence of buried seed was the major factor governing natural revegetation of a bulldozed disturbance in Alaskan tussock tundra. The viable buried seed pool contained 97% Eriophorum vaginatum and Carex bigelowii seed and was restricted to organic soil horizons. Consequently, disturbed organic soils reached a final seedling density of 250 seedlings m super(-2) (primarily Carex and Eriophorum ) 4 years after disturbance, whereas mineral soils which were colonized by current seed deposition had only 30 seedlings m super(-2), including many grasses. Fertilization enhanced the growth of grass and 2-4 year old Carex seedlings four- to ten-fold but had no significant effect upon Eriophorum seedling growth. Growth was not significantly affected by presence of already established seedlings and did not differ between substrates, except for grasses which grew more rapidly on mineral than organic soils.

DOI10.2307/2403140
Short TitleDemographic patterns of seedling establishment and growth of native graminoids in an Alaskan tundra disturbance