نتایج جستجو برای: estuaries

تعداد نتایج: 5331  

2004
CRAIG A. LAYMAN D. ALBREY ARRINGTON R. BRIAN LANGERHANS BRIAN REED SILLIMAN

—We used underwater visual census (UVC) to characterize fish assemblages among estuaries with different degrees of fragmentation on Andros Island, Bahamas. Estuaries were classified a priori into four fragmentation categories: totally fragmented (no surface water connectivity to the ocean), partially fragmented, minimally fragmented, and unfragmented (unimpeded surface water connectivity throug...

Journal: :international journal of environmental research 2012
k. pillay s. pillay

in general, estuaries may be classified variously according to inlet dynamics, geomorphology orwhether they are tide or river dominated or, on a combination of all three factors. in kwazulu-natal (kzn),south africa, the four recognised estuary types are temporary opened-closed estuaries (toces), permanently opened estuaries, estuarine lakes and river mouths. since physico-chemical parameters ar...

Journal: :international journal of environmental research 0
k. pillay school of environmental sciences, university of kwazulu-natal,south africa s. pillay school of environmental sciences, university of kwazulu-natal,south africa

in general, estuaries may be classified variously according to inlet dynamics, geomorphology orwhether they are tide or river dominated or, on a combination of all three factors. in kwazulu-natal (kzn),south africa, the four recognised estuary types are temporary opened-closed estuaries (toces), permanently opened estuaries, estuarine lakes and river mouths. since physico-chemical parameters ar...

2015
Michael Pusey

Despite comprising only 2.2% of the area of the Northern Territory, estuaries are major repositories of biodiversity; 40% of all fishes recorded from the Northern Territory occur in estuaries and 33% of all northern Australian freshwater fishes require access to estuaries to breed. Estuaries are vital nursery areas for many fish species including many that are of economic importance. Importantl...

ژورنال: مهندسی دریا 2023

Estuaries and bays are areas with a wide range of hydrodynamic and morphological phenomena. The existence of this diversity in environmental processes will lead to complex and sometimes unknown interactions in their structure. Understanding the behavior and environmental conditions of these beaches will improve the attitude of coastal users for better management of these areas. Many classificat...

2010
arnoldo valle-levinson

This chapter discusses definitions and classification of estuaries. It presents both the classical and more flexible definitions of estuaries. Then it discusses separate classifications of estuaries based on water balance, geomorphology, water column stratification, and the stratification–circulation diagram – Hansen–Rattray approach and the Ekman–Kelvin numbers parameter space. The most widely...

2008
Li-Qing Jiang Wei-Jun Cai Yongchen Wang

The partial pressure of carbon dioxide (pCO2), concentration of total dissolved inorganic carbon, and total alkalinity were measured at both high tide and low tide in the surface water of three Georgia estuaries from September 2002 to May 2004. Of the three estuaries, Sapelo and Doboy Sounds are marine-dominated estuaries, while Altamaha Sound is a river-dominated estuary. During all sampling m...

2011
Matthew S. Merrifield Ellen Hines Xiaohang Liu Michael W. Beck

Estuaries are ecologically and economically valuable and have been highly degraded from both land and sea. Estuarine habitats in the coastal zone are under pressure from a range of human activities. In the United States and elsewhere, very few conservation plans focused on estuaries are regional in scope; fewer still address threats to estuary long term viability.We have compiled basic informat...

Journal: :محیط شناسی 0
دکتربهروز بهروزی راد دکترمحمدرضا احمدی

survey of macrobenthos of kolahy and tiab estuaries was carried out in 1996 - 1997. in this research, 25 macrobenthos genera in tiab and 30 macrobenthos genera in kolahy were identified. t-test showed there was no significant difference between macrobenthos population of both estuaries. the z-test showed, that there were well correlation between macrobenthos populations and season in both estua...

Journal: :The Journal of parasitology 2010
J C Shaw R F Hechinger K D Lafferty A M Kuris

We describe the distribution and abundance of the brain-encysting trematode Euhaplorchis californiensis and its second intermediate host, the California killifish (Fundulus parvipinnis), in 3 estuaries in southern California and Baja California. We quantified the density of fish and metacercariae at 13-14 sites per estuary and dissected 375 killifish. Density (numbers and biomass) was examined ...

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