Alewife habitat
habitat_ale.Rd
A dataset containing the surface area of Alewife habitat and features for individual flow line segments or waterbodies (lakes) comprising habitat units in Atlantic coast drainages.
Format
A data frame with 246,259 observations of 7 variables:
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REACHCODE code used to identify individual habitat units
Hab_sqkm surface area of habitat in square kilometers
Latitude latitude at downstream terminus of habitat unit
State governmental unit at downstream terminus of habitat unit
River_huc name of river to which habitat unit belongs, derived from hydrologic unit codes
POP genetic reporting group geographic region within which habitat unit falls
DamOrder order of dam at downstream terminus of habitat unit. Cumulatively assigned such that all habitat units upstream of a given dam all have dam_order >= 1
Examples
head(habitat_ale)
#> REACHCODE Hab_sqkm Latitude State River_huc POP
#> 1 2.04E+12 0.008199607 41.12328 NJ Upper Delaware MAT
#> 2 2.04E+12 0.010045756 39.88029 PA Lower Delaware MAT
#> 3 1.09E+12 0.016462307 42.12254 MA Massachusetts-Rhode Island Coastal. SNE
#> 4 1.10E+12 0.141209610 41.38672 CT Connecticut Coastal SNE
#> 5 2.02E+12 0.006305018 41.30567 NY Upper Hudson MAT
#> 6 1.09E+12 0.000186516 42.27801 MA Massachusetts-Rhode Island Coastal. SNE
#> DamOrder
#> 1 7
#> 2 0
#> 3 5
#> 4 1
#> 5 3
#> 6 8