نتایج جستجو برای: sea
تعداد نتایج: 130133 فیلتر نتایج به سال:
Integrated sediment multiproxy studies and modeling were used to reconstruct past changes in the Baltic Sea ecosystem. Results of natural changes over the past 6000 years in the Baltic Sea ecosystem suggest that forecasted climate warming might enhance environmental problems of the Baltic Sea. Integrated modeling and sediment proxy studies reveal increased sea surface temperatures and expanded ...
It is usually assumed that metabolic constraints restrict deep-sea corals to cold-water habitats, with 'deep-sea' and 'cold-water' corals often used as synonymous. Here we report on the first measurements of biological characters of deep-sea corals from the central Red Sea, where they occur at temperatures exceeding 20°C in highly oligotrophic and oxygen-limited waters. Low respiration rates, l...
Concentration and electrophoretic properties of blood serum albumin of the round goby Neogobius melanostomus caught in Black Sea and Azov Sea were studied in relation to age, sex, maturation stage and season. Electrophoretic mobility of serum albumin in Black Sea fish increased with age, while in Azov Sea goby it varied less. No differences were observed in albumin characteristics between femal...
oceanographic images obtained from environmental satellites by a wide range of sensors allow characterizing natural phenomena through different physical measurements. for instance sea surface temperature (sst) images, altimetry data and ocean color data can be used for characterizing currents and vortex structures in the ocean. the purpose of this thesis is to derive a relatively complete frame...
خاک های مرتعی از دید اکولوژیکی دارای اهمیت فوق العاده ای می باشند. مراتع حدود نیمی از اراضی دنیا را پوشانده و وجود ارتفاعات زاگرس در استان چهار محال و بختیاری پوشش متنوعی از مراتع را به وجود آورده است که به دلیل ویژگی و موقعیت خاص جغرافیایی، شرایط آب و هوایی و همچنین تشکیلات زمین شناسی از اهمیتی حیاتی برخوردار می باشند. ماده ی مادری و پستی بلندی جزو فاکتورهای ذاتی کیفیت خاک محسوب می شوند ولی هن...
OBJECTIVE To identify risk factors that may predispose California sea lions (Zalophus californianus) to development of cutaneous poxvirus nodules during hospitalization in a rehabilitation center. DESIGN Retrospective case-control study. ANIMALS 90 California sea lions admitted to a rehabilitation center. PROCEDURE Hospital records of 275 stranded California sea lions admitted to the reha...
OBJECTIVE To determine the effect of natural exposure to domoic acid (DA) on eosinophil counts and adrenal gland function in California sea lions (Zalophus californianus). DESIGN Cross-sectional prospective study. ANIMALS 39 California sea lions. PROCEDURES Adult female sea lions admitted to a rehabilitation hospital during 2009 were classified into 1 of 3 groups (acute DA toxicosis, chro...
This study aims to analyse sea use landscape patterns on a regional scale based on methods of landscape ecology integrated with sea use spatial characteristics. Several landscape-level analysis indices, such as the dominance index, complex index, intensivity index, diversity index and sea congruency index, were established using Geographic Information System (GIS) and applied in Huludao, China....
The average global sea level was rising through the 20th century as a result of global warming [8, 9, 26]. The Fifth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC) estimated that between 1901 and 2010, the mean sea level rate 1.7±0.2 mm/yr and increased to 3.2±0.4 mm/yr between 1993 and 2010, and projected that in 2100 the largest increase in global average sea level ...
The focus of this study is the assessment of the main range and geophysical corrections needed to derive accurate sea level time series from satellite altimetry in the Indonesia seas, the ultimate aim being the determination of sea level trend for this region. Due to its island nature, this is an area of large complexity for altimetric studies, a true laboratory for coastal altimetry. For this ...
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