نتایج جستجو برای: estuaries

تعداد نتایج: 5331  

2005
Robert R. Christian Daniel Baird Joseph Luczkovich Jeffrey C. Johnson Ursula M. Scharler Robert E. Ulanowicz

Assessments of trophic structure through ecological network analysis (ENA) have been done in a wide variety of estuarine and coastal environments. For example, some have used it to compare trophic structures within ecosystems focusing on temporal conditions (Baird and Ulanowicz 1989; Baird et al. 1998) and among ecosystems focusing on spatial conditions (e.g. Baird and Ulanowicz 1993; Christens...

2012
Arthur L. Bass Guillermo R. Giannico Gabriel T. Brooks

Passive integrated transponder (PIT) technology is rarely utilized in estuaries due to (1) saline water’s attenuation of an antenna’s electromagnetic field, (2) rapidly changing water properties and levels, and (3) the challenges of installing and maintaining antennas in silty, brackish conditions. We present methods for the construction and installation of antennas that can detect 12-mm full-d...

2006
Robert W. Howarth Roxanne Marino

The first special volume of Limnology and Oceanography, published in 1972, focused on whether phosphorus (P) or carbon (C) is the major agent causing eutrophication in aquatic ecosystems. Only slight mention was made that estuaries may behave differently from lakes and that nitrogen (N) may cause eutrophication in estuaries. In the following decade, an understanding of eutrophication in estuari...

Journal: :محیط زیست طبیعی 0
علی رضا میرزاجانی عضو هیئت علمی مؤسسۀ تحقیقات علوم شیلاتی کشور ـ پژوهشکدۀ آبزی پروری آب های داخلی (بندر انزلی) احمد قانع عضو هیئت علمی مؤسسۀ تحقیقات علوم شیلاتی کشور ـ پژوهشکدۀ آبزی پروری آب های داخلی (بندر انزلی) سید حجت خداپرست عضو هیئت علمی مؤسسۀ تحقیقات علوم شیلاتی کشور ـ پژوهشکدۀ آبزی پروری آب های داخلی (بندر انزلی) سیدقاسم قربانزاده زعفرانی گروه اکولوژی دریا ـ معاونت محیط زیست دریایی سازمان حفاظت محیط زیست امید صدیقی سوادکوهی گروه اکولوژی دریا ـ معاونت محیط زیست دریایی سازمان حفاظت محیط زیست

the coastal areas are highly productive system that is degrading due to receiving huge amount of various pollutants. despite of the important of north caspian sea estuaries the quality index of benthic fauna received less attention. in this survey the benthic population of 18 rivers estuaries in southern caspian sea were investigated. the benthic sampling and identification were conducted at ei...

Journal: :journal of the persian gulf marine sciences 0
mohammad afarin mohammad ali hamzeh hossein negarestan iranian national institute for oceanography and atmospheric science, tehran, ir iran

in the present paper various transects perpendicular to iranian makran coasts (chabahar-gawater) were studied using satellite image processing, field observations, sandy shore profiling and grain size analysis to evaluate sedimentology and geomorphology of the area. data revealed that the study area includes exposed rocky shores (52%), sandy shores (40%), and mud flats (8%) sheltered in estuari...

Journal: :Scottish Geographical Magazine 1886

Journal: :Journal of Geophysical Research: Oceans 1998

Journal: :Coastal Engineering Proceedings 1980

Journal: :Frontiers for Young Minds 2021

Anchovies, salmon, sardines, gobies, mullets, flounder, bass, barbels, eels, shad, and even sharks—what do they have in common? Well, at certain points their lives you may find them estuaries, the final sections of rivers before meet ocean. Some fish live estuaries entire lives. However, some species prefer living freshwater parts others only close to ocean, a few spread throughout estuary. bot...

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