Recently Updated Pages
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...
13.5 Attributes and recommendations
Attributes Species abundance data are by far the most commonly used in environmental impact studi...
13.4 Hard-bottom epifauna and hard-bottom motile fauna
Hard-bottom epifauna The advantages of using hard-bottom encrusting faunas, reef-corals etc. are:...
13.3 Macrobenthos and meiobenthos
Macrobenthos The advantages of soft-bottom macrobenthos are that: a) They are relatively non-mobi...
13.2 Plankton and fish
Plankton The advantages of plankton are that: a) Long tows over relatively large distances result...
13.1 Components
The biological effects of pollutants can be studied on assemblages of a wide variety of marine or...
12.4 Laboratory experiments
More or less natural communities of some components of the biota can be maintained in laboratory ...
12.3 Field experiments
Field manipulative experiments include, for example, caging experiments to exclude or include pre...
12.2 `Natural experiments’
It is doubtful whether so called natural experiments deserve to be called ‘experiments’ at all, a...
12.1 Introduction
In Chapter 11 we have seen how both the univariate and multivariate community attributes can be c...
11.7 Concluding remarks
For this chapter as a whole, two final points need to be made. The topic of experimental and fiel...
11.6 Linkage trees (and example)
The idea of linkage trees¶ is most easily understood in the context of a particular example, so F...
11.5 Further ‘BEST’ variations
Entering variables in groups In some contexts, it makes good sense to utilise an a priori group s...