Life-forms, cell-sizes and ecological guilds of diatoms in European rivers
نویسندگان
چکیده
منابع مشابه
Water Quality Monitoring in European and Turkish Rivers Using Diatoms
Water is one of the most essential factors for civilization, and also among the most important items in the new world order due to its unrenewable feature. In this regard, developed countries have continually been monitoring and classifying their water. For this reason, a number of EU countries have developed a national water quality system, considering characteristic structure of their own riv...
متن کاملBuilding capacity for ecological assessment using diatoms in UK rivers
Diatoms have become an integral part of the UK’s freshwater monitoring strategy over the past two decades, mostly in response to increasingly stringent European Union (EU) legislation. The use of diatoms is based on strong correlations between diatom assemblages and environmental variables, and from knowledge of the “expected” (= “reference”) state of each river. The nationwide overview of the ...
متن کاملLife history trade-offs assemble ecological guilds.
Ecological theory predicts that competition for a limiting resource will lead to the exclusion of species unless the within-species effects outweigh the between-species effects. Understanding how multiple competitors might coexist on a single resource has focused on the prescriptive formalism of a necessary niche width and limiting similarity. Here, we show how continuously varying life histori...
متن کاملthe role of russia in transmission of energy from central asia and caucuses to european union
پس ازفروپاشی شوروی،رشد منابع نفت و گاز، آسیای میانه و قفقاز را در یک بازی ژئوپلتیکی انرژی قرار داده است. با در نظر گرفتن این منابع هیدروکربنی، این منطقه به یک میدانجنگ و رقابت تجاری برای بازی های ژئوپلتیکی قدرت های بزرگ جهانی تبدیل شده است. روسیه منطقه را به عنوان حیات خلوت خود تلقی نموده و علاقمند به حفظ حضورش می باشد تا همانند گذشته گاز طبیعی را به وسیله خط لوله مرکزی دریافت و به عنوان یک واس...
15 صفحه اولsecuritization of mortality risks in life annuities
insurers have in the past few decades faced longevity risks - the risk that annuitants survive more than expected - and therefore need a new approach to manage this new risk. in this dissertation we survey methods that hedge longevity risks. these methods use securitization to manage risk, so using modern financial and insurance pricing models, especially wang transform and actuarial concepts, ...
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ژورنال
عنوان ژورنال: Knowledge and Management of Aquatic Ecosystems
سال: 2012
ISSN: 1961-9502
DOI: 10.1051/kmae/2012018