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Afforestation with Eucalyptus globulus and leaf litter decomposition in streams of northern Spain

Pozo, Jesús and Basaguren, Ana and Elosegi, Arturo and Molinero, Jon and Fabre, Eric and Chauvet, Eric Afforestation with Eucalyptus globulus and leaf litter decomposition in streams of northern Spain. (1998) Hydrobiologia : The International Journal of Aquatic Sciences , 373/374. 101-110. ISSN 0018-8158

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Official URL: http://link.springer.com/article/10.1023%2FA%3A1017038701380

Abstract

To test the hypothesis that decomposition of leaf species in streams is influenced by afforestation with Eucalyptus globulus, we compared decay rates, nutrient levels, fungal biomass and macroinvertebrate assemblages on alder and eucalyptus leaf litter in three streams (two headwaters under different forests, and a mid reach) of the Agüera catchment (northern Spain). Whatever the reach, alder always decomposed significantly faster than eucalyptus. Litter contents in nitrogen and phosphorus rose during breakdown at the mid reach, but not at the headwaters. No differences in fungal biomass were found between alder and eucalyptus leaves at the headwater reaches; however, at the mid reach, eucalyptus showed the highest values. Alder litter, a high quality substratum, was readily colonized by shredders, and decayed rapidly at all sites. Eucalyptus, a low quality species, had lower nutrient contents and was less favoured by shredders. Under high nutrient levels (particularly phosphorus), however, it was readily colonized by fungi, thus shifting from medium to high breakdown rates. The potentially negative impact of afforestation with eucalyptus on streams can thus be reduced in situations of high concentrations of dissolved nutrients.

Item Type:Article
Additional Information:Thanks to Springer Science editor. The definitive version is available at http://link.springer.com/article/10.1023%2FA%3A1017038701380
HAL Id:hal-00956309
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Universidad del País Vasco - Euskal Herriko Unibertsitatea - EHU (SPAIN)
Laboratory name:
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Deposited By: Eric Chauvet
Deposited On:06 Mar 2014 10:34

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