کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4392964 1618250 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Plant species identity and soil P forms in an oligotrophic grassland-desert scrub system
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Plant species identity and soil P forms in an oligotrophic grassland-desert scrub system
چکیده انگلیسی
Soil phosphorus (P) is one of the most important but least understood nutrients supporting productivity in terrestrial ecosystems. This study explored the relative importance of plant species richness or composition in the association with concentrations of different soil P forms in an oligotrophic grassland-desert scrub system in the central region of the Chihuahuan Desert (Mexico). Our results suggest that species identity, rather than richness, is more related to pools of soil P in different forms in the studied system. However, plant species richness also appears to be related to soil P patterns when analyzed alone. Differences in Allenrolfea occidentalis coverage are associated with differences of total P pool in grassland plots between 60.4 and 110.2 mg/kg of dry soil. In desert scrub, Nerisyrenia camporum coverage is associated with total P between 207.2 and 243.8 mg/kg of dry soil. Coverage of Jatropha dioica is associated with soluble + labile P pool between 29.7 and 22.6 mg/kg of dry soil; and Larrea tridentata coverage is associated with soil organic P pool between 3.1 and 18.0 mg/kg of dry soil. These results may be explained by the existence of key plant species with functional attributes that are closely related to soil P.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Arid Environments - Volume 108, September 2014, Pages 29-37
نویسندگان
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