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Effects of Insect Mass Outbreaks on Throughfall Composition in Even Aged European Pine Stands - Implications for the C and N Cycling | OMICS International | Abstract
ISSN: 2157-7617

Journal of Earth Science & Climatic Change
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Research Article

Effects of Insect Mass Outbreaks on Throughfall Composition in Even Aged European Pine Stands - Implications for the C and N Cycling

Anne le Mellec1*, Jerzy Karg2, Zdzislaw Bernacki2, Jolanta Slowik3, Ignaczy Korczynski4, Timo Krummel1, Andrzej Mazur4, Holger Vogt-Altena1, Gerhard Gerold1 and Annett Reinhardt1
1University of Goettingen, Landscape Ecology Section, Goldschmidtstr. 5, D-37077 Goettingen, Germany
2Research Centre for Agricultural and Forest Environment, Polish Academy of Sciences, Field Station Turew, Szkolna 4, Pl-4-000 Kościan, Poland
3University of Goettingen, Centre for Nature Conservation (CNC), von Sieboldstrasse 2, D-7075 Goettingen, Germany
4Poznan University of Life Sciences, Department of Forest Entomology, Ul. Wojska Polskiego 71c, PL-60-637 Poznan, Poland
Corresponding Author : Anne le Mellec
University of Goettingen
Landscape Ecology Section
Goldschmidtstr. 5, D-37077 Goettingen, Germany
Tel: (+49) 0551-3912134;
Received November 12, 2010; Accepted December 22, 2010; Published December 24, 2010
Citation: le Mellec A, Karg J, Bernacki Z, Slowik J, Korczynski I, et al. (2010) Effects of Insect Mass Outbreaks on Throughfall Composition in Even Aged European Pine Stands - Implications for the C and N Cycling. J Earth Sci Climat Change 1:101. doi: 10.4172/2157-7617.1000101
Copyright: © 2010 le Mellec A, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


In this paper we report on the herbivore-affected C and N concentrations in the throughfall and altered canopy to soil transfer during a Pine Lappet (Dendrolimus pini L) mass infestation in 60-year-old Scots Pine (Pinus sylvestris L) forests. Our investigations covered a period of 7 months and could show, that herbivore defoliation significantly altered C and N concentrations in the throughfall solution and enhanced organic matter input situation to the forest floor. Compared to the uninfested site mean concentrations of the throughfall solution at the infested site under strong frass activity contained 80% more C and 61% more N. Additionally, C and N inputs were with 131 kg C ha-1 time-1 and 9.6 kg N ha-1 time-1 higher under strong frass activity during 3 months compared to the input at the uninfested site. We assume that outbreaks of phytophagous insects play an important key role in monoculture forest by influencing the nutrient turnover.


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