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Jentsch, Anke ; Friedrich, Silke ; Beyschlag, Wolfram ; Nezadal, Werner:
Significance of ant and rabbit disturbances for seedling establishment in dry acidic grasslands dominatet by Corynephorus canescens.
In: Phytocoenologia.
Bd. 32
(2002)
Heft 4
.
- S. 553-580.
ISSN 0340-269X
DOI: https://doi.org/10.1127/0340-269X/2002/0032-0553
Abstract
Seedling establishment is a crucial bottleneck for vegetation dynamics. However,little is known about the spatio-temporal patterns of small-scale disturbances offeringbare substrate for germination, nor about the establishment rates of key pioneer species.This paper presents (i) temporal patterns of ant and rabbit disturbances in dry acidicgrasslands dominated by Corynephorus canescens on inland sand dunes, and (ii) establishmentrates of Corynephorus canescens, Spergula morisonii, Teesdalia nudicaulis and Rumexacetosella on disturbance patches versus undisturbed controls. Spatially explicit disturbancepatterns of five sites – characterized by the associations Sper gulo morisoni i-Corynephoretum typicum and Spergulo mori soni i-Corynephore tum cl adonietosum– are recorded throughout 17 months at two scales (1 m ×1 m; 0.1 m ×0.1 m)in addition to plant establishment rates and cryptogam cover. A total of 1050 data recordsfrom 75 permanent plots is statistically analysed. Between 1% and 15% of the grasslandsare covered by disturbance patches with a distinct seasonal pattern and limited longevity.For Corynephorus canescens, Spergula morisonii and Teesdalia nudicaulis, successful seedlingestablishment is significantly higher on small disturbed plots than on control plots,which are covered by cryptogams. Hence, these results provide evidence of the importanceof small-scale disturbances as a window of opportunity for seedling establishmentin dry acidic grassland. The findings are discussed with regard to the contribution ofdisturbance to the balance of grassland dynamics.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Zusätzliche Informationen: | BAYCEER99789 |
| Institutionen der Universität: | Forschungseinrichtungen > Forschungszentren > Bayreuther Zentrum für Ökologie und Umweltforschung - BayCEER Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Professur Störungsökologie Fakultäten Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften Forschungseinrichtungen Forschungseinrichtungen > Forschungszentren |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik |
| Eingestellt am: | 21 Dec 2015 07:59 |
| Letzte Änderung: | 21 Dec 2015 07:59 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/29120 |