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1

Social metabolism analysis using emergy

100%
Ortega E., Bacic M. J.
Ecological Questions
|
2014
|
tom 19
After studying ecosystems and biosphere function for decades, Howard T. Odum sketched a methodology for calculating the value of the biophysical resources of nature and also the products of human activity. The methodology of “emergy” or “solar energy previously added” measures the biophysical work embedded in processes that use geological and biological resources and also human labor. According to Odum, the economic value (price) and the biophysical value (work added) generally do not coincide, as the market ignores or does not consider all factors of production. This paper explains the analysis of production-consumption systems using the emergy and discusses its potential utility in sustainable regional planning.
2

Emergy and value of the net primary production (NPP) above ground in natural areas

100%
Siche R., Ortega E.
Ecological Questions
|
2008
|
tom 10
3

Water quality assessment of the Mogi-Guaçu River in Brazil: proposal of a system-based model

100%
Scariot M. R., Ortega E.
Ecological Questions
|
2008
|
tom 10
4
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Evolution of reception efficacy and execution in women’s volleyball according to level of competition – a descriptive study aged from 14-year-old to adult professional players

81%
Echeverria C. J., Ortega E., Palao J. M.
Central European Journal of Sport Sciences and Medicine
|
2019
|
tom 27
|
nr 3
5

Biofuel production from water hyacinth in the Pantanal wetland

71%
Bergier I., Salis S. M., Miranda C. H. B., Ortega E., Luengo C. A.
International Journal of Ecohydrology and Hydrobiology
|
2012
|
tom 12
|
nr 1
6

Afforestation of heathlands and its influence on the land cover, accumulation of plant biomass and energy flow in the landscape: an example from Zaborski Landscape Park

61%
Nienartowicz A., Lewandowska-Czarnecka A., Ortega E., Deptula M., Filbrandt-Czaja A., Kownacka M.
Ecological Questions
|
2015
|
tom 21
In the mid-19th century, the sheep industry played a considerable part in sheep breeding in Pomerania. Livestock grazing took place on extensive heathlands developed as a result of land deforestation performed in the 17th and 18th century, as well as during and after the Napoleonic wars. The sheep industry and the related textile craft developed until the 1890s when the Prussian government began the restoration of forests after the period of their excessive exploitation. The Prussian government policy contributed to the afforestation and the growing forest range through purchasing of landed estates, in particular the Polish ones, and creating forest divisions, followed by reconstruction of forests. This paper presents the history of the Widno estate belonging to Mr. Konstanty Przytarski. The estate was located in the northern part of the present-day Zaborski Landscape Park, near the town of Brusy and Chojnice. In 1894, the estate was sold to the Prussian forest administration. The paper presents changes in the land use and the forest above-ground biomass. Furthermore, changes in the structure of the energy flow network through the natural and production-cultural subsystems are presented. The network structure was analysed according to the methodology presented by H.T. Odum. Data contained in the sales contract of the Widno estate were used in the analysis, together with a forest inventory book of the Prussian Forest Inspectorate Zwangshoff and inventory books of the Polish Inspectorate Przymuszewo. The study highlighted the increasing role of sheep breeding on small family farms established by employees of the forest division on the leased lands. This form of activity refers to the economic traditions in the region of Zabory.
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