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SPEcies At Risk (SPEAR) metric

Source: R/calc-spear.R
calc_spear.Rd

Indicator based on biological traits used to detect effects of pesticides on non-target freshwater invertebrate organisms. It can be calculated at Taxonomic Levels 2, 4 and 5.

Usage

calc_spear(data, recoveryArea = "unknown", taxa_list = "TL2")

Arguments

data

Dataframe of results with four columns: SAMPLE_NUMBER, TAXON, SPEAR_SPECIES, RESULT

recoveryArea

There are 3 different paramaters depending on availability of "Recovery areas" information:

  • "Absent" - No presence of recovery areas

  • "Present" - Presence of recovery areas

  • "Unknown" - No information available

taxa_list

The taxonomic level the sample(s) have been identified at according to specificed taxa lists as described in WFD100 Further Development of River Invertebrate Classification Tool. Either "TL2" - Taxa list 2, "TL4" - Taxa list 4 or "TL5" - Taxa list 5.

Value

dataframe with metric outputs

References

Liess M. & Von der Ohe P. 2005. Analyzing effects of pesticides on invertebrate communities in streams. Environ Toxicol Chem. 24: 954-965.

Wogram J. & Liess M. 2001. Rank ordering of macroinvertebrate species sensitivity to toxic compounds by comparison with that of Daphnia magna. Bull Environ Contam Toxicol. 67: 360-367

Liess M., Schaefer R., Schriever C. 2008. The footprint of pesticide stress in communities - Species traits reveal community effects of toxicants. Science of the Total Environment. 406: 484-490

See also

filter_spear

Examples

spearOutput <- calc_spear(demo_data, taxa_list = "TL2")