کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6541800 | 1421346 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Eleven years of simulated deposition of nitrogen but not sulfur changed species composition and diversity in the herb stratum in a boreal forest in western Canada
ترجمه فارسی عنوان
یازده سال رسوب نیتروژن شبیه سازی شده، اما نه گوگرد تغییر ترکیب و تنوع گونه ها در ورقه گیاه در جنگل های ساحلی در غرب کانادا
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کلمات کلیدی
تنوع گونه ها، شستشوی کاتیونی، اسیدی شدن خاک، عدم تعادل تغذیه ای، شیمی برگ
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
بوم شناسی، تکامل، رفتار و سامانه شناسی
چکیده انگلیسی
Oil sands mining activities in northern Alberta, Canada emit large amounts of nitrogen (N) and sulfur (S) oxides to the atmosphere, increasing N and S deposition. We studied the long-term (2006-2016) effect of elevated concentrations of simulated N and S deposition on soil properties and understory species composition in a mixedwood boreal forest in a two (0 and 30â¯kgâ¯Nâ¯haâ1 yearâ1, as ammonium nitrate) à two (0 and 30â¯kg S haâ1 yearâ1, as sodium sulfate) factorial experiment. Soil (forest floor and 0-15â¯cm mineral soil) and understory vegetation samples were collected and the cover of understory vegetation was determined in August 2016. Eleven years of N deposition increased (pâ¯=â¯.045) total N concentration and decreased (pâ¯<â¯.10 unless otherwise indicated) carbon to N ratio by 11 and 7%, respectively, in the forest floor. Sulfur deposition decreased (pâ¯=â¯.045) exchangeable calcium concentration by 36% in the mineral soil. Species evenness (by 7%) and the overall diversity (by 7%) were decreased and community composition was changed (pâ¯=â¯.008) in the herb stratum by N but not by S deposition, due to species-specific responses to N deposition. However, elevated concentrations of N and S deposition did not change species diversity and composition in the shrub stratum. Decreased foliar phosphorus and potassium concentrations and increased N to phosphorus ratio in some species indicate a potential risk of nutrient imbalance by N deposition. Reducing N emission to minimize its negative effect on boreal forest ecosystems should be a priority in emissions management in the oil sands.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Forest Ecology and Management - Volume 412, 15 March 2018, Pages 1-8
Journal: Forest Ecology and Management - Volume 412, 15 March 2018, Pages 1-8
نویسندگان
Jin-Hyeob Kwak, Scott X. Chang, M. Anne Naeth,