spsurvey (version 3.1)

NLA_2007: Western Mountains Ecoregion Lakes in the EPA National Lakes Assessment (NLA) for 2007

Description

A data frame containing attributes for lakes sampled by the EPA National Lakes Assessment (NLA) in the Western Mountains Ecoregion during 2007.

Usage

data(NLA_2007)

Format

A data frame with 236 rows and the following 15 columns:

siteID

site ID value.

xcoord

Albers projection x-coordinate.

ycoord

Albers projection y-coordinate.

wgt

survey design weight.

Lake_Origin

lake origin category.

Chla

chlorophyll-a concentration.

OE5

value of the index of macroinvertebrate taxa loss.

PTL

total phosphorus concentration.

NTL

total nitrogen concentration.

Turbidity

turbidity value.

Chla_cond

condition class category ("Good", "Fair", or "Poor") of the chlorophyll-a value.

OE5_cond

condition class category of the macroinvertebrate taxa loss index.

PTL_cond

condition class category of the total phosphorus value.

NTL_cond

condition class category of the total nitrogen value.

Turbidity_cond

condition class category of the turbidity value.

Examples

data(NLA_2007)
head(NLA_2007)