کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6384536 | 1626630 | 2016 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Poor oxic conditions in a large estuary reduce connectivity from marine to freshwater habitats of a diadromous fish
ترجمه فارسی عنوان
شرایط زیستی ضعیف در یک دره بزرگ باعث کاهش قابلیت اتصال از دریایی به زیستگاه های آب شیرین ماهی می شود
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کلمات کلیدی
اتصال شرایط خفیف، تله متری آکوستیک، مهاجرت اساطیری، آلیس ساد،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
چکیده انگلیسی
Connectivity in aquatic systems is often related to abundance and permeability of physical barriers, such as dams, which delay or impede movements of biota with important consequences for aquatic biodiversity. Water quality may, however, also control connectivity between essential habitats. In macrotidal estuaries, Estuarine Turbidity Maxima (ETM) have a strong impact on water quality because of the low oxygen concentration occurring as a response to the related high bacterial and low photosynthetic activities. In this study, we assess Allis shad estuarine spawning migration in 2011 and 2012 in the Loire River (France) where the ETM occurs at spring and summer. Using an acoustic telemetry array, we show that trans-estuarine migration is inhibited during hypoxic episodes in the middle part of the estuary. Shad tends to stay in downstream areas, and even at sea, where oxygen conditions are more suitable. Trans-estuarine migration occurs hastily during neap tide when the ETM decreases, both in terms of spatial extent and intensity, inducing a shift in a set of covariates including dissolved oxygen, which increases, and suspended matter, which decreases. In the context of climate warming, ETM are expected to increase with probable adverse implications for shad migration success and doubtless other diadromous populations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Estuarine, Coastal and Shelf Science - Volume 169, 5 February 2016, Pages 216-226
Journal: Estuarine, Coastal and Shelf Science - Volume 169, 5 February 2016, Pages 216-226
نویسندگان
Stéphane Tétard, Eric Feunteun, Elise Bultel, Romain Gadais, Marie-Laure Bégout, Thomas Trancart, Emilien Lasne,