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11.5 Further ‘BEST’ variations
Entering variables in groups In some contexts, it makes good sense to utilise an a priori group s...
11.3 Linking biota to univariate environmental measures (and examples)
Univariate community measures If the biotic data are best summarised by one, or a few, simple uni...
11.2 Example: Garroch Head macrofauna
For the 12 sampling stations (Fig. 8.3) across the sewage-sludge dump ground at Garroch Head {G},...
11.1 Introduction
Approach In many studies, the biotic data is matched by a suite of environmental variables measur...
10.3 Recommendation
Clearly the operational taxonomic level for environmental impact studies is another factor to be ...
10.1 Species aggregation
Fig. 10.1a repeats the multivariate ordination (nMDS) seen in Fig. 1.7 for the macrofaunal data f...
9.6 Example: Fal estuary copepods
and present biotic and environmental data from five creeks of the Fal estuary, SW England, whos...
9.2 Univariate case
For purely illustrative purposes, Table 9.1 extracts the counts of a single Thyasira species from...
8.7 Multiple diversity indices
A large number of different diversity measures can be computed from a single data set and it is r...
8.6 Example: Plymouth particle-size data
Fig. 8.15 is from Coulter Counter data of particle-size distributions for estuarine water samples...
8.5 Multivariate tools used on univariate data
Ekofisk macrofauna: testing dominance curves Fig. 8.5b compares the averaged community samples fo...
8.4 Examples: Loch Linnhe and Garroch Head macrofauna
ABC curves for the macrobenthos at site 34 in Loch Linnhe, Scotland {L} between 1963 and 1973 are...
8.3 Examples: Garroch Head and Ekofisk macrofauna
Plots of geometric abundance classes along a transect across the Garroch Head {G} sewage-sludge d...
8.2 Graphical/distributional plots
The purpose of graphical/distributional representations is to extract information on patterns of ...
6.8 Example: Mesocosm experiment (two-way crossed case with no replication)
Although the above test may still function if a few random cells in the 2-way layout have only a ...
7.1 Species clustering
Chapter 2 (page 2.4) describes how the original data matrix can be used to define similarities be...
8.1 Univariate measures
A variety of different statistics (single numbers) can be used as measures of some attribute of c...
Compute time & limits on path numbers
A new option in PRIMER 7 recognises that computation time can become an issue for particular rela...
Box plots & means plots for diversity indices
The sheet Data1 of this suite of diversity indices for each of the 277 samples, split into 9 sea ...
Testing taxonomic distinctness against a master list
Wide-ranging biogeographic studies, and particularly historic data, are often restricted to simpl...