Species sorting and stoichiometric plasticity control community C:P ratio of first-order aquatic consumers.

Ecological stoichiometry has proven to be invaluable for understanding consumer response to changes in resource quality. Although interactions between trophic levels occur at the community level, most studies focus on single consumer species. In contrast to individual species, communities may deal with trophic mismatch not only through elemental plasticity but also through changes in species composition.

[Department of epidemiology of the National Institute of Hygiene in Warsaw in the years 1951-2011--origins of forming, developmental ways in 60 years of work].

The paper discussed the origins of forming in 1951 the Department of Epidemiology, National Institute of Hygiene in Poland and its subsequent tasks. Relating to the evolving tasks, changes in the organizational structure, professional profile of the staff, main professional challenges and scientific achievements are described in 10 years cycles. Successive chapters address: scientific careers of the Department staff and contribution to scientific development of the whole institute among others; teaching and training, mainly targeted at the epidemiological service staff in Poland; editorial and publishing activities.

[Veterinary doctors in the National Institute of Hygiene].

On the ninetieth anniversary of National Institute of Hygiene in Warsaw, we should mention also veterinary research workers engaged at this Institute. People educated in the field of veterinary medicine (47 persons) during they stay published 1261 papers, achieved 15 doctor and H assistant professorship degrees. This veterinary professional group fully participated in Medical Public health Sciences, transforming human life for better.