کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4382205 1617800 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Feeding preferences of native terrestrial isopod species (Oniscoidea, Isopoda) for native and introduced leaf litter
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
پیش نمایش صفحه اول مقاله
Feeding preferences of native terrestrial isopod species (Oniscoidea, Isopoda) for native and introduced leaf litter
چکیده انگلیسی


• Native isopods exhibited species-specific preferences for different litter species.
• Feeding preferences were only partially influenced by C/N ratio and lignin content.
• In food-choice tests, isopods readily consumed leaf litter of introduced trees.
• Introduced litter was consumed in equal or even higher amounts than native litter.
• Introduced leaf litter has no negative effect on macrofaunal decomposition.

Due to current predictions for Central Europe that forecast higher frequencies of hot and dry summers, Mediterranean drought-tolerant oak species are being evaluated as future forest trees for German forest sites that are becoming increasingly damaged by water deficit. As a result of planting foreign tree species, the leaf litter composition and thus the food resources of native saprophagous macroarthropods will change, possibly altering primary decomposition processes. Therefore, experiments concerning the acceptance and palatability of introduced versus native litter for native isopods were undertaken. Consumption rates of four native isopod species (Porcellio scaber, Oniscus asellus, Trachelipus rathkii, Trachelipus ratzeburgii) were investigated in laboratory choice tests with introduced (Quercus pubescens, Quercus frainetto, Quercus ilex) and comparable native (Fagus sylvatica, Quercus robur) leaf litter. Litter was characterized by measurement of C/N-ratios and lignin content. Although species-specific preferences of isopods could be observed in the experiments, Mediterranean oak litter was consumed by all investigated species. Furthermore, two isopod species even preferred the leaf litter of the introduced Q. ilex. Compared to native beech or oak litter, litter from these introduced tree species thus apparently do not negatively influence the consumption rates of terrestrial isopods. Possible reasons for the determined preferences are discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Soil Ecology - Volume 83, November 2014, Pages 95–100
نویسندگان
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