کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4391719 1618119 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The efficiency of earthworm extraction methods is determined by species and soil properties in the Mediterranean communities of Central-Western Spain
ترجمه فارسی عنوان
کارایی روش های استخراج کرم خاکی به واسطه گونه ها و ویژگی های خاک در جوامع مدیترانه ای از مرزهای مرکزی غربی اسپانیا است
کلمات کلیدی
نمونه برداری از کرم خاکی، مشتقات شیمیایی، دستی مرتب سازی، مرحله بلوغ، گروه اکولوژیک، خاک های مدیترانه ای
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش خاک شناسی
چکیده انگلیسی


• We compare efficiency of earthworm extraction methods in farmed Mediterranean soils.
• Chemical expellants were suitable to establish species richness and anecic earthworms.
• Hand-sorting was indispensable to estimate endogeic species abundance.
• Response to sampling methods depends on maturity, habitat type and soil properties.
• No single sampling method seems suitable for Mediterranean earthworms.

Given the well-known role of earthworms in the functioning and health of soils and whole ecosystems, feasible and reliable studies of their abundance and diversity in agricultural lands are essential for the effective design of best agricultural practices. However, previous work has shown that the extraction efficiency of different methods proposed seems to depend on species and size of earthworms and presumably on soil type, which makes creating an earthworm inventory difficult. In the present study, we compare the efficiency of five earthworm extraction methods combining hand-sorting with chemical expellants (hand-sorting, formalin, allyl isothiocyanate (AITC), formalin + hand-sorting and AITC + hand-sorting) over a wide range of soil properties (depth, texture and water regime) in cultivated and semi-natural habitats found in a Mediterranean region (CW-Spain). Sampling efficacy was measured in terms of number of earthworms extracted, taking into account different species, ecological groups, development stages, size of individuals, and soil properties. We found 20 species, only 6 endogeic and 1 anecic species being abundant. The anecic Aporrectodea trapezoides responded reasonably to chemical expellants, as did certain soil surface dwelling endogeic species (Microscolex phosphoreus and Microscolex dubius), with above 50% of specimens of these species sampled after chemical application. For other endogeic species, such as Allolobophora molleri and Aporrectodea rosea, chemical expellants gave poor results (<15% and 5% of specimens, respectively), and combined methods produced similar results to hand-sorting alone. Hand-sorting appears necessary for sampling the total earthworm community in particular for endogeic species, but when only species richness is of interest, the application of a chemical expellant can be a time-efficient method. Response to different methods was irrespective of the earthworm size within species, but depended on the maturity stage of the specimens, habitat type and soil properties, making difficult the adoption of a simple sampling protocol for large surveys in highly fragmented Mediterranean earthworm communities.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Journal of Soil Biology - Volume 73, March–April 2016, Pages 59–68
نویسندگان
, , , , , ,