کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8847039 1617855 2018 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Grasshoppers affect grassland ecosystem functioning: Spatial and temporal variation
ترجمه فارسی عنوان
ملخ ها بر عملکرد اکوسیستم چمن تاثیر می گذارند: تنوع فضایی و زمانی
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم دامی و جانورشناسی
چکیده انگلیسی
Using experiments and monitoring, we find that grasshoppers in a grassland ecosystem impact ecosystem functioning (nutrient cycling and primary production) in different ways among sites in the ecosystem. Experiments conducted over many years at two sites (21 and 15 years, respectively) with the same grasshopper and plant species demonstrated that grasshoppers increased nitrogen availability (N) and consequently annual plant production (ANPP) at one site, and decreased N and consequently ANPP at the other site. Comparing the two sites, N increased on average by 8% and up to 21.6%, and resulting ANPP increased on average by 18.6% and up to 33.3%. Grasshoppers increase N and ANPP by preferentially feeding on slower decomposing plants, and the opposite occurs by preferentially feeding on faster decomposing plants. Monitoring 20 random sites in the ecosystem, grasshoppers consistently increased N and ANPP over 3 years at 40% of sites, consistently decreased N and ANPP at 35% of sites, and sometimes increased and decreased N and ANPP at 25% of sites. Therefore, grassland grasshoppers, and insects in many ecosystems, may strongly affect ecosystem functioning.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Basic and Applied Ecology - Volume 26, February 2018, Pages 24-34
نویسندگان
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