Article (Scientific journals)
Assessment of changes in soil organic matter after invasion by exotic plant species
Koutika, Lydie*-Stella; Vanderhoeven, SONIA; Chapuis-Lardy, Lydie et al.
2007In Biology and Fertility of Soils, 44 (2), p. 331-341
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Keywords :
biological invasion; soil C mineralisation; exotic invasive plants; litter decomposition; native plants; particulate organic matter
Abstract :
[en] Invasive exotic plants can modify soil organic matter (SOM) dynamics and other soil properties. We evaluated changes in particulate organic matter (POM) and carbon (C) mineralisation in adjacent plots invaded by Solidago gigantea, Prunus serotina, Heracleum mantegazzianum and Fallopia japonica, and non-invaded control plots on different soils in Belgium. Litter decomposition of S. gigantea and P. serotina was compared to that of the native species Epilobium hirsutum, Betula pendula and Fagus sylvatica. Disregarding the differences in site characteristics (soil texture, parental material and plant species), we argued that the invasion by S. gigantea and P. serotina enhance SOM dynamics by increasing C mineralisation in 2 out of 3 sites invaded by S. gigantea and in 1 out of 3 sites invaded by P. serotina; C in coarse POM (cPOM, 4,000-250 mu m) and fine POM (fPOM, 250-50 mu m) in 1 site invaded by S. gigantea and C content in total POM (tPOM, 4,000-50 mu m) and the organo-mineral fraction (OMF, 0-50 mu m) in 1 site invaded by P. serotina. H. mantegazzianum and F. japonica slowed down SOM dynamics by reducing C mineralisation in three out of four sites; C and nitrogen (N) of fPOM in the invaded compared with the non-invaded plots at one site invaded by H. mantegazzianum. However, N content of cPOM (4,000-250 mu m) was higher in the invaded sites by F. japonica compared with the non-invaded plots. Our results indicated that the effects of invasion by exotic plant species were not species-specific but site-specific.
Disciplines :
Environmental sciences & ecology
Author, co-author :
Koutika, Lydie*-Stella
Vanderhoeven, SONIA ;  Université Libre de Bruxelles - ULB
Chapuis-Lardy, Lydie
Dassonville, Nicolas
Meerts, Pierre
Language :
English
Title :
Assessment of changes in soil organic matter after invasion by exotic plant species
Publication date :
2007
Journal title :
Biology and Fertility of Soils
ISSN :
0178-2762
eISSN :
1432-0789
Publisher :
Springer Science & Business Media B.V.
Volume :
44
Issue :
2
Pages :
331-341
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 27 May 2010

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