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Ecosystem services: the ecology and economics of current debates

100%

Braat L. C.

Ekonomia i Środowisko

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2014

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nr 4[51]

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Ecosystem functions and services

100%

Costanza R.

Ekonomia i Środowisko

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2012

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nr 2

3

Ecohydrological status of Lake Tana – a shallow highland lake in the Blue Nile (Abbay) basin in Ethiopia: review

80%

Ligdi E. E., El Kahloun M., Meire P.

International Journal of Ecohydrology and Hydrobiology

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2010

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tom 10

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nr 2-4

This paper is based on a country report for Ethiopia prepared as a part of the ecohydrology component of IHP UNESCO’s FRIEND/Nile-phase II Project. It reviews past and current research in the Lake Tana sub-basin around the lake. The objective of the study was to determine the ecohydrological status of the Lake as a tool for integrated water resource management in improving the sustainability of the quantity and quality of freshwater resources in the Nile basin. The preliminary results show that reduced lake water level with its annual fluctuations and seasonal floods associated with high flows are becoming amplified and frequent, and the total average annual sediment load of the four major tributaries shows an increasing trend. Source pollution from urban waste and rural agriculture, and degradation of biota in the catchment are the two main environmental threats for the lake ecosystem. Knowledge gaps were identified and future research needs were recommended along with suggestion of some potential phytotechnologies to be applied in the study area.

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Biodiversity and energy transfer to top trophic levels in two contrasting Arctic fjords

80%

Weslawski J. M., Kwasniewski S., Stempniewicz L., Blachowiak-Samolyk K.

Polish Polar Research

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2006

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tom 27

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nr 3

259-278

The food and foraging strategy of fifteen species of seabirds and sea mammals from two high Arctic fjords were analysed. One of the fjords, Kongsfjord, is strongly influenced by warm waters from the Atlantic, while Hornsund is of a more Arctic character. Prey species in the Atlantic waters were more diverse (82 species and 16 functional groups) compared to those of Arctic waters (67 prey species and 14 functional groups). The consumption of top predators from Hornsund in the peak season of July was estimated at 2.86*106 MJ, while that in Kongsfjord was 1.35*106 MJ. For the analysed function of the ecosystem (the transfer of energy to the top trophic levels) the specific character of prey species is of key importance and not the diversity, abundance or biomass per se. Lower species diversity and biomass in Arctic waters is compensated for by the occurrence of larger individuals of these species, which permits top predators to prey directly on lower trophic levels.

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Selection of coastal estuarine habitats by Atherina boyeri larvae in laboratory experiments

80%

de Sousa Goncalves R. I., Ben-Hamadou R., Chicharo L. M. Z.

International Journal of Ecohydrology and Hydrobiology

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2012

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tom 12

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nr 4

6

Ecosystem services as part of the gross domestic product account

80%

Famielec J.

Ekonomia i Środowisko

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2012

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nr 2

Ograniczanie wyników

3 Ekonomia i Środowisko

2 International Journal of Ecohydrology and Hydrobiology

1 Polish Polar Research

1 Ben-Hamadou R.

1 Blachowiak-Samolyk K.

1 Braat L. C.

1 Chicharo L. M. Z.

1 Costanza R.

1 El Kahloun M.

1 Famielec J.

1 Kwasniewski S.

1 Ligdi E. E.

1 Meire P.

1 Stempniewicz L.

1 Weslawski J. M.

1 de Sousa Goncalves R. I.

1 2014

3 2012

1 2010

1 2006

Ecosystem services: the ecology and economics of current debates

Ecosystem functions and services

Ecohydrological status of Lake Tana – a shallow highland lake in the Blue Nile (Abbay) basin in Ethiopia: review

Biodiversity and energy transfer to top trophic levels in two contrasting Arctic fjords

Selection of coastal estuarine habitats by Atherina boyeri larvae in laboratory experiments

Ecosystem services as part of the gross domestic product account