Linkages of Litter and Soil Carbon, Nitrogen and Phosphorus Stoichiometry in a Temperate Broad -Leaved Forest Stand

  • سال انتشار: 1396
  • محل انتشار: فصلنامه اکوپرشیا، دوره: 5، شماره: 4
  • کد COI اختصاصی: JR_ECOPER-5-4_004
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 89
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نویسندگان

Behnaz Samadzadeh

M.Sc. of Forestry, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, Noor, Mazandaran, Iran

Yahya Kooch

Assisstant Professor of Forestry, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, Noor, Mazandaran, Iran

Seyed Mohsen Hosseini

Professor of Forestry, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, Noor, Mazandaran, Iran

چکیده

Background: Measures of nutrient availability such as concentrations of carbon (C), nitrogen (N) and phosphorus (P) are important indicators of terrestrial ecosystems productivity. Current research illustrates the C, N and P stoichiometry of litter and soil in a coastal mixed forest stand, northern Iran. Materials and Methods: To this, the Carpinus betulus (CB), Acer velutinum (AV), Pterocarya fraxinifolia (PF), Quercus castaneifolia (QC) species were considered; litter and soil (۰-۱۵cm depth) samples were taken under tree canopy cover. Results: Litter and soil C: N ratio differed among the tree species, showing the highest (۶۱.۰۸ and ۳۱.۴۴) and lowest (۲۱.۹۰ and ۳.۵۹) under the QC and CB tree species, respectively. The litter and soil C: P ratio varied among the study sites and ranked in order of QC (۵۲.۴ and ۲۷۲۲۷.۰۴) > PF (۳۰ and ۱۴۶۵.۶۱) > AV (۱۵.۷۴ and ۶۳۰.۵۴) ≈ CB (۱۳.۴۲ and ۵۶۶.۲۸). The higher amounts of litter N: P ratio were significantly found under QC (۰.۸۶) > PF (۰.۷۳) > CB (۰.۶۱) ≈ AV (۰.۵۵), whereas soil N: P ratio were significantly higher under CB (۱۷۷.۶۹) > PF (۱۲۳.۵۳) ≈ AV (۱۲۱.۶۰) > QC (۱۰۹.۲۵), respectively. Conclusion: We found the species that differed in traits could influence C, N and P dynamics and its stoichiometry. The Q. castaneifolia species with different root traits that resulted in different vertical and horizontal distributions of C, N and P, reflecting differences in nutrient uptake by plants and microbial dynamics, drove the biggest changes in litter and soil C, N and P.

کلیدواژه ها

Carbon, Ecological stoichiometry, Nitrogen, Phosphorus, Tree species

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