|Characterisation Method Name:|
|Arable land use impact on NEX|
|Principal Method Name:|
|EPS: Emperical modelling|
|NEX stands for Normalised EXtinction of species.|
The characterisation factor is determined by an empirical method.
Category indicator value in system considered
Järvinen (1987) presents statistics on threat causes for endangered species in Sweden and Finland.
In Finland, which to a very large part is covered by forests, and where agriculture uses only a small part of the area, 1.5% of the endangered species have running agriculture as a major threat cause. In Sweden farming is responsible for the threat to 19% of the endangered species.
Considering the pressure on land in many of the highly populated and bio-diversity rich tropical and temperate regions, it is assumed that the use of arable land for agriculture is responsible for at least the same magnitude of threat as in Sweden,
i.e. 20%. Assuming that the contribution to the threat is the same as the contribution to
extinction, this gives a category indicator value of 0.2 NEX in the environmental system
Contribution to category indicators value from a flow unit
The global use of arable land is about 1.4E+13 m 2 year per year. The contribution from the use of 1 m 2 is therefore 7.1E-14 /m 2 year.
Calculation of characterisation factor
The characterisation factor is thus 0.2 NEX*7.1E-14 /m 2 year = 1.42E-14 NEX/m 2 year
|1. Järvinen, O. and Miettinen, K., “Sista paret ut” Naturskyddsföreningen, Miljöförlaget, 1987.(In Swedish)|
|The system is global, but limited to arable land. The time frame is 1990.|
|Characterisation Parameter||Category Indicator||Impact Indication Principle||Aspect||Substance||Quantity||Unit||Notes|
|Arable land use EPS/2000||1.42E-14||NEX/m2 year|