EMAP Comparative Analysis

1
EMAP Comparative Analysis

• Shared analysis of 3 data sets
• Teresa Magee and Paul Ringold
• EPA EMAP

2
Data Sets

• FHM (using P3 veg)
• Pacfish/Infish Biological Opinion Effectiveness
  Monitoring (PIBO)
• EMAP enhanced plots
• (Also.DEQ plots using EMAP protocols)

3
Initial Questions

• Do data from the three methodologies produce
  similar lists of plant species for each reach?
• Does the species composition of a given reach
  differ based on data collected using the
  different methods?

4
Do data from the three methods produce similar
values for metrics?

• Species Richness and Evenness
• Species Diversity
• Ratio of invasives/natives Index of Alien
  InvasivenessEMAP procedure-develop invasiveness
  rank for each species

5
Considerations

• Are there significant differences in any of these
  metrics between methodologies?
• Evaluate the above variables for normality.
• If differences exist, is this due to methodology
  (and timing of sampling) or to differences in
  sampling scale?

6
Do data from the three methodologies produce
similar groupings of vegetation?

• Assign the 23 study reaches to four vegetation
  series previously identified by EPA.
• Use Indicator Species Analysis to identify
  indicator species which typify each series for
  each data set. Are these species substantively
  the same for the data collected by all the
  methods?

7
Are relationships of vegetation groups to
environmental variables similar for all three
data sets?

• Use NMS to generate ordination plots for each of
  the three data sets. Are the distributions of
  the 23 reaches similar on all three ordination
  diagrams?
• Combine env/disturb/veg structure data from all
  three sources into one data set (reaches x
  variables).
• If there are differences in what is most
  correlated for a given analysis, is this a
  function of plot size, location?

8
Are relationships of metrics describing
vegetation conditions to environmental,
disturbance, vegetation structure, vegetation
group, and diversity variables similar for the
three methodologies?

• Use Spearman rank correlation to identify, the
  environmental, disturbance, vegetation structure,
  vegetation group, and diversity variables that
  are strongly related the condition metrics