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16.6 Comparison of resemblance measures
S Tikus Island coral cover The use of second-stage MDS plots can be extended to also include the ...
16.5 Second-stage MDS
It is not normally a viable sampling strategy, for soft-sediment benthos at least, to use BVStep ...
16.4 Further extensions
Both BEST Bio-Env and BVStep routines can be generalised to accommodate possibilities other than ...
16.2 Matching of ordinations
The BEST (Bio-Env) technique of Chapter 11 can be generalised in a natural way, to the selection ...
15.6 Examples
Example: Tees Bay macrofauna Fig. 15.7 shows the nMDS plot for the inter-annual macrofauna sample...
15.4 Breakdown of seriation
Clear-cut zonation patterns in the form of a serial change in community structure with increasing...
15.3 Increased variability
noted that, in a variety of environmental impact studies, the variability among samples collecte...
15.2 Meta-analysis of marine macrobenthos
This method was initially devised as a means of comparing the severity of community stress betwee...
14.3 Examples 4, 5, 6 and 7
Example 4: Fish communities from coral reefs in the Maldives In the Maldive islands, compared ree...
Appendix 3: Bibliography
Addison & Clark (1990) Addison, R.F. and Clarke, K.R. (1990) ‘Biological effects o...
Running the Bootstrap Averages routine
None of the above is necessary in order to create the means plot with regions based on bootstrap ...
Output options for region plots
These b bootstrap averages for each of the g groups are then displayed in a low-d mMDS space and ...
Bootstrap definition
The construction of approximate regions is approached through bootstrap averages. We only have on...
Status of region estimates
Ordination means plots are therefore a vital tool for interpretation but, in relation to their un...
‘Ellipses’ for joint values of ($\Delta^{\scriptscriptstyle +}$, $\Lambda^{\scriptscriptstyle +}$))
The final option is to consider $\Delta^{\scriptscriptstyle +}$ and $\Lambda^{\scriptscriptstyle ...
12.1 Introduction
In Chapter 11 we have seen how both the univariate and multivariate community attributes can be c...
12.2 `Natural experiments’
It is doubtful whether so called natural experiments deserve to be called ‘experiments’ at all, a...
11.7 Concluding remarks
For this chapter as a whole, two final points need to be made. The topic of experimental and fiel...
12.3 Field experiments
Field manipulative experiments include, for example, caging experiments to exclude or include pre...
11.6 Linkage trees (and example)
The idea of linkage trees¶ is most easily understood in the context of a particular example, so F...