Sampling Methods
Best detects exotic invasive species
Time-meander method
We're going to Forest Park WITHOUT Doug and are trying to quickly assess the abundance of invasive species. Which sampling method do you choose?
Team Discussions
- Not time-meander method because we don't have a skilled botanist
Time-meander method
You're sampling a site that you know has many sedges and grasses. What method do you choose?
- Time-meandered missed species that other three methods detected in the study
Best at describing relative species abundance and why
- Stratified-Random Plot
- Estimates species cover from a larger area
Describe scenario in which you would want to use modified Whittaker method
Team Discussions
- Site where you know vegetation is centrally-focused
Factors that limit the detection ability of using time-meander method
- If there is a relatively dense cover
- Skill of botanist
You're asked to design a long-term study that aims to monitor vegetation patterns and detect the presence of invasive species. Which methods do you combine and why?
Team Discussions
Stratified-random method & time-meandered method
2 pitfalls of systematic plot method according to study
- Samples lowest percentage of site
- Overestimated abundance of native weeds
3 key factors to consider when assessing invasive species and determining appropriate methods
- Time & Cost
- Environment/Characteristics of site
- Purpose/Goals