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Stadler, Bernhard ; Michalzik, Beate:
Aphid infested Norway spruce are "hot spots" in throughfall carbon chemistry in coniferous forests.
In: Canadian Journal of Forest Research.
Bd. 28
(1998)
Heft 11
.
- S. 1717-1722.
ISSN 1208-6037
DOI: https://doi.org/10.1139/x98-153
Abstract
Throughfall chemistry in deciduous and coniferous forests is characterized by a high spatial and temporal variability, the sources of which are largely unknown. Aphids on Norway spruce, produce large quantities of honeydew, which is rich in sugars. We investigated the effect of changes in aphid abundance on throughfall carbon chemistry of Norway spruce using a rainfall simulation experiment. Aphid numbers in the experiment paralleled field infestations.Infested trees showed significantly higher concentrations of dissolved organic carbon (DOC) and hexose-C in throughfall solutions compared to uninfested trees. There was also a pronounced seasonal trend in the concentrations of these carbon compounds with highest concentrations recorded at the time of peak aphid abundance at the end of June/beginning of July. The throughfall from a spruce tree showed no spatial (center vs. periphery) differences in DOC and hexose-C concentrations. The number of aphids on a tree was the best predictor of the carbohydrate concentration of throughfall, explaining more than 60% of the variability. During the period of aphid infestation (May-September) average estimated field fluxes of DOC in throughfall collected under heavily infested trees ('hot spots') was 11.6 and 240 times higher than those recorded under moderately and uninfested trees, respectively. The results implicate herbivores as a major potential source of the spatiotemporal heterogeneity in flows of nutrients in forests.
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| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Zusätzliche Informationen: | BAYCEER7228 |
| Institutionen der Universität: | Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Lehrstuhl Bodenökologie Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Biologie Forschungseinrichtungen > Forschungszentren > Bayreuther Zentrum für Ökologie und Umweltforschung - BayCEER 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: | 22 Okt 2015 07:29 |
| Letzte Änderung: | 22 Okt 2015 07:29 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/20708 |