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17.2 Average taxonomic diversity and distinctness
Two measures, which address some of the problems identified with species richness and the other d...
17.1 Species richness disadvantages
Chapter 8 discussed a range of diversity indices based on species richness and the species abunda...
16.8 Example: Algal recolonisation, Calafuria
An example of this type (though not a classic BACI situation) is given by , for a study by . Sub-...
16.7 Second-stage interaction plots
Phuket coral-reef times series A rather different application of second-stage MDS¶ is motivated b...
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 ...
16.3 Example: Amoco-Cadiz oil spill
Applying this (BVStep) procedure to the 125-species set from the Bay of Morlaix, a smallest subse...
16.2 Matching of ordinations
The BEST (Bio-Env) technique of Chapter 11 can be generalised in a natural way, to the selection ...
16.1 Introduction
To motivate the first method of this chapter look again at the analysis of macrobenthic samples f...
15.6 Examples
Example: Tees Bay macrofauna Fig. 15.7 shows the nMDS plot for the inter-annual macrofauna sample...
15.5 Model matrices & ‘RELATE’ tests
The form of the seriation statistic is simply a matrix correlation coefficient (e.g. equation 11....
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...
15.1 Introduction
We have seen in Chapter 14 that multivariate methods of analysis are very sensitive for detecting...
14.4 General conclusions and recommendations
General conclusions Three general conclusions emerge from these examples: The similarity in com...
14.3 Examples 4, 5, 6 and 7
Example 4: Fish communities from coral reefs in the Maldives In the Maldive islands, compared ree...
14.2 Examples 1, 2 and 3
Example 1: Macrobenthos from Frierfjord/Langesundfjord, Norway As part of the GEEP/IOC Oslo Works...
14.1 Introduction
Two communities with a completely different taxonomic composition may have identical univariate o...