Efficient non efficient use of ecosystem resources first results from ecosystem capital accounts
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Efficient/ non efficient use of ecosystem resources: first results from ecosystem capital accounts. Jean-Louis Weber & Emil Ivanov.

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Efficient non efficient use of ecosystem resources first results from ecosystem capital accounts

Efficient/ non efficient use of ecosystem resources: first results from ecosystem capital accounts

Jean-Louis Weber & Emil Ivanov


Jean louis weber emil ivanov

(Net) Landscape Ecological Potential or LEP: the indicator is made by combining landscape attributes of:- artificiality (built up areas, intensive agriculture…)- natural value (from European and national designations)- fragmentation by main transport networksLEP change is driven by land cover change (LEAC)


Jean louis weber emil ivanov
NECB

Net Primary Production (NPP)

Minus Net Resource Use (withdrawals minus returns and leftovers)

  • Harvest of crops

  • Harvest of timber

  • Grazing

    Minus soil release to the atmosphere (soil respiration, fermentation, VOC…)

    Minus soil release to water (erosion, leaching…)

    Plus organic fertilisation

    Plus/Minus transfers between accouting units

    = Net Ecosystem Carbon Balance

    Stock t1 + NECB = Stock t2


Jean louis weber emil ivanov

Net Primary Production is a measurement of the biomass produced by the vegetation. It is a function of land use, soil and climate (humidity and temperature). NPP values are lower in the North because of temperature and in the South because of lack of water resource.


Jean louis weber emil ivanov

Net Ecosystem Carbon Balance by 1km2 standard European grid. 2000NECB is the difference between biomass/carbon resources (NPP…) and uses (harvest of timber, crops as well as grazing). NECB is negative where tree clearing has taken place – which will be in general compensated by new vegetation in following years. NECB is very low and sometimes negative in intensive broad pattern agriculture areas – which is a structural deficit reflecting bad resource efficiency (high harvest vs. low NPP resulting from bare soils during several month a year). Consequences are trends to depletion of soil organic carbon (natural fertility) and poor biodiversity.

Agriculture areas with mosaic landscape (e.g with hedgerows) have a positive NECB.




Jean louis weber emil ivanov

Net Ecosystem Carbon Balance by 1km2 standard European grid. 2000NECB is the difference between biomass/carbon resources (NPP…) and uses (harvest of timber, crops as well as grazing). NECB is negative where tree clearing has taken place – which will be in general compensated by new vegetation in following years. NECB is very low and sometimes negative in intensive broad pattern agriculture areas – which is a structural deficit reflecting bad resource efficiency. Agriculture areas with mosaic landscape (e.g with hedgerows) have a positive NECB.


Intensive broad pattern agriculture areas agriculture areas with mosaic landscape
Intensive broad pattern agriculture areas 2000Agriculture areas with mosaic landscape


Jean louis weber emil ivanov

Biodiversity index: here proportion of BAD/ALL in Art. 17 ReportingIntensive broad pattern agriculture areas have bad performance regarding biodiversity (purple cells) because of low NECB (little biomass left available for biodiversity) and use of chemicals.Agriculture areas with mosaic landscape have not the good performance expected regarding biodiversity (because of hedgerows and positive NECB). The cause is likely to be the use of pesticides…


Jean louis weber emil ivanov

To produce ecosystem carbon accounts, conventional statistics need to be downscaled to the 1km2 standard European grid. Here: forest statistics of timber harvest