Empirically-weighted Proportion of Sediment-sensitive Invertebrates (E-PSI)

A sediment-sensitive macro-invertebrate metric that provides a proxy to describe the extent to which the surface of river bed are composed, or covered by sediments. It can be calculated at Taxonomic Levels 2 & 5

Usage

calc_epsi(
  data,
  names = macroinvertebrateMetrics::column_attributes$name,
  questions = c("Taxon abundance", "Taxon Abundance"),
  taxa_list = "TL2",
  log_abundance = TRUE,
  metric_cols = macroinvertebrateMetrics::metric_cols
)

Arguments

data: Dataframe with at least three columns itemSAMPLE_ID - unique idenftier for each sample itemTAXON - Taxon name that matches to macroinvertebrateTaxa dataset itemRESULT - Numeric log abundance category
names: Optional, user provided list of column names different to those used in `column_attributes` to match with input data
questions: Optional, user provided 'question' default is 'Taxon abundance', which filters only abundance values.
log_abundance: If RESULT column in ecologyResults not log category then set to FALSE. This will calculate log value from your numeric abundance.
taxaList: 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 or "TL5" - Taxa list 5.

Value

Dataframe with itemSAMPLE_ID

itemANALYSIS_NAME

itemDETERMINAND

itemRESULT

References

Turley, Matt & Bilotta, Gary & Chadd, Richard & A Extence, Chris & E Brazier, Richard & Burnside, Niall & Pickwell, Alex. (2016). A sediment-specific family-level biomonitoring tool to identify the impacts of fine sediment in temperate rivers and streams. Ecological Indicators. 70. 151-165. 10.1016/j.ecolind.2016.05.040.

Examples

sample <- demo_data
calc_epsi(data = sample, taxa_list = "TL2")
#> # A tibble: 137 × 5
#>    sample_id parameter_long                          parameter question response
#>    <chr>     <chr>                                   <chr>     <chr>    <chr>   
#>  1 1017980   Enhanced Proportion of Sediment-sensit… METRIC E… EPSI Sc… 97.3177…
#>  2 1017980   Enhanced Proportion of Sediment-sensit… METRIC E… EPSI Co… Minimal…
#>  3 1101214   Enhanced Proportion of Sediment-sensit… METRIC E… EPSI Sc… 94.7977…
#>  4 1101214   Enhanced Proportion of Sediment-sensit… METRIC E… EPSI Co… Minimal…
#>  5 1250462   Enhanced Proportion of Sediment-sensit… METRIC E… EPSI Sc… 97.7455…
#>  6 1250462   Enhanced Proportion of Sediment-sensit… METRIC E… EPSI Co… Minimal…
#>  7 1419451   Enhanced Proportion of Sediment-sensit… METRIC E… EPSI Sc… 98.9023…
#>  8 1419451   Enhanced Proportion of Sediment-sensit… METRIC E… EPSI Co… Minimal…
#>  9 1457665   Enhanced Proportion of Sediment-sensit… METRIC E… EPSI Sc… 99.3715…
#> 10 1457665   Enhanced Proportion of Sediment-sensit… METRIC E… EPSI Co… Minimal…
#> # ℹ 127 more rows