کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5764539 1626065 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Natural forcings on a transformed territory overshoot thresholds of primary productivity in the Guadalquivir estuary
ترجمه فارسی عنوان
قوای طبیعی در یک سرزمین تبدیل شده، آستانه های بهره برداری اولیه در گودالکوییر را از بین می برد
کلمات کلیدی
کدورت در دسترس بودن نور، رودخانه های مخلوط، محصول اولیه، گوادالکوییر، یوتروفیزیک،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
چکیده انگلیسی
A three year-long quasi continuum sampling dataset on the Guadalquivir estuary water quality was used to assess the role of light availability on its biological production. We found that inorganic nutrients within the estuary are very high (with mean values for inorganic nitrogen and phosphorous of 285 and 2.4 μM respectively) while phytoplankton biomass remains low most of the time (with a mean value of 2.6 mg/m3). A strong relationship between phytoplankton biomass and water turbidity was found indicating that, indeed, light availability is the major constraint of primary production in this system. Most of the time this limitation of primary production is not associated to enhanced turbidity connected to fresh water inputs. Instead, our data indicate that, independently of freshwater inputs, the photosynthesis is restricted by tidal forcings enhancing turbidity in an estuary that has been highly modified. Our results match with classical theories on the functioning of well-mixed, estuarine ecosystems as well as with recent modeling exercises. We also discuss the potential impacts of this particular characteristic of some estuarine systems for their management and regulatory control.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Continental Shelf Research - Volume 148, 15 September 2017, Pages 199-207
نویسندگان
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