Evidence details
11 Feb 2020
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Study
- Citation
- Webb, J. A., & Keough, M. J. (2000). Effects of two marinas on the composition of fouling assemblages. Biofouling.
- Study description
- Surveys were used to compare the fouling taxa inside and outside of two marinas in Melbourne, Australia. Settlement plates were used to collect fouling organisms and the compositions compared
Response
- Cause term/trajectory
-
Water quality
(Decrease)
- Cause description
- The cause has been assumed that water quality is reduced inside of pleasure boat marinas. Another way of characterising this could be a development increase, but no options for this so far
- Effect term/trajectory
-
Invertebrates - abundance
- Effect description
- For this example, just talking about abundance of polychaete worms. These were in greater abundances inside the marina
- Response measure type
- F statistic/ratio
- Statistical significance
- Significant: p < 0.001
- Documentation
- Table 2, p352
- Response measure description
- 2-way ANOVA undertaken, but the F ratio was not reported. MS residual and df recorded, which could get some way back towards an F ratio, but with a p value of <0.001, the number cannot be done propetly.
Design
- Source data
- Field
- Study type
- Observation
- Study design
- Control/reference vs. treatment/impact (no before)
- Number of independent control or reference sampling units
- 2
- Number of indendent impact or treatment sampling units
- 2 vs 2
- Sample size used in analysis
- 58 fouling plates used altogether
- Design description
- Two marinas, with paired sites inside and outside the marina. 16 plates deployed at each location, but some lost
Context
- Climate
- Temperate
- Country
- Australia
- Habitat
- Estuary
- Spatial extent
- Drainage basin
- Temporal extent
- Months
- Context description
- Fouling plates left to develop for several months. Spatial extent is an uncomfortable fit.