منابع مشابه
bioaccumulation in marine birds
The aim of this work was the determination of Po, U, U, Pu and Pu concentration in marine birds which permanently or temporally live in the southern Baltic Sea coast. We chose 11 species of seabirds: three species permanently residing at southern Baltic Sea, four species of wintering birds and three species of migrating birds. The results show that analyzed radionuclides are non-uniformly distr...
متن کاملMarine birds and plastic pollution
The intrinsic properties and widespread presence of plastic particles in the marine environment have profound effects on birds inhabiting the world's oceans. Industrial and user-plastics composed of polystyrene, polypropylene, polyethylene, styrofoam, and polyvinyl chloride are the most prevalent forms of plastic marine pollution. Their dispersal and accumulation, in average densities of 1000 t...
متن کاملHistory of marine biology
Marine biology is a hybrid subject that combines aspects of organismal function, ecological interaction and the study of marine biodiversity.[1] The earliest studies of marine biology can be traced back to the Phoenicians and the Greeks who are known as the initial explorers of the oceans and their composition.[2] However, it was Aristotle (384-322 BC) who was the first to record any observatio...
متن کاملThe salt-secreting gland of marine birds.
Marine birds possess salt-secreting nasal glands which produce hypertonic solutions of sodium chloride in response to osniotic loads such as ingestion of sea water. The concentration of the secreted fluid is always high, several times as high as the maximum urine concentration in birds. The presence of this gland must be considered a necessary adaptation to marine life in animals whose kidney c...
متن کاملAdvances in Marine Biology
The ongoing and future effects of global climate change on natural and human-managed ecosystems have led to a renewed interest in the concept of ecological thresholds or tipping points. While generalizations such as poleward range shifts serve as a useful heuristic framework to understand the overall ecological impacts of climate change, sophisticated approaches to management require spatially ...
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ژورنال
عنوان ژورنال: The Auk
سال: 2003
ISSN: 1938-4254,0004-8038
DOI: 10.1093/auk/120.1.240