کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8845520 1617113 2018 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A regional benthic fauna assessment method for the Southern North Sea using Margalef diversity and reference value modelling
ترجمه فارسی عنوان
یک روش ارزیابی فون های بنیادی منطقه ای برای دریای شمال جنوبی با استفاده از تنوع مارگالف و مدل سازی مرجع
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
چکیده انگلیسی
For testing the effects of bottom fishing pressure, normalized index values (NIV; index value divided by reference value) were used. The rationale for using NIVs is the assumption that, although a certain level of bottom fishing pressure will have a larger absolute effect on more biodiverse benthic communities in deeper waters than on more robust and less biodiverse coastal benthic communities, the relative effects (tested using NIVs) are comparable. A clear exponentially decreasing relationship (R2 = 0.26-0.27, p < 0.00001) was found between both bottom surface and subsurface fishing activity (penetration depth <2 cm and >2 cm, respectively) and normalized Margalef diversity values, with an asymptotic normalized Margalef value of 0.45 at a subsurface fishing activity >2.3 sweeps/year. This asymptotic value is predominantly found in coastal waters, and probably shows that the naturally more robust coastal benthic communities have been transformed into resilient benthic communities, which rapidly recover from increasing fishing pressure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ecological Indicators - Volume 89, June 2018, Pages 667-679
نویسندگان
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