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Change in marine communities : an approach to statistical analysis and interpretation
A practical strategy for analysing multispecies distribution patterns
A strategy is presented for analysing marine biological survey data and relating the biotic patterns to environmental data to avoid circular argument, and the 4 major station groups and species groups are related to one another in terms of morphological adaptation to the habitat.
A taxonomic distinctness index and its statistical properties
For biological community data (species-by-sample abundance matrices), Warwick & Clarke (1995) defined two biodiversity indices, capturing the structure not only of the distribution of abundances…
A further biodiversity index applicable to species lists: variation in taxonomic distinctness
The combination of Δ+ and Λ+ is seen to provide a statistically robust summary of taxonomic (or phylogenetic) relatedness patterns within an assemblage, which has the potential to be applied to a wide range of historical data in the form of simple species lists.
A new method for detecting pollution effects on marine macrobenthic communities
- R. Warwick
- Environmental Science
- 1 September 1986
A method is described by which the pollution status of a marine macrobenthic community may be assessed without reference to a temporal or spatial series of control samples, based onoretical considerations suggest that the distribution of numbers of individuals among species should behave differently when influenced by pollution-induced disturbance.
Similarity-based testing for community pattern: the two-way layout with no replication
A limited way forward is provided for hypothesis testing in the absence of replicates of a two-way layoutwithout replication, with data from two experimental and two field studies involving meiofaunal communities from soft-sediment and macro-algal habitats.
New \'biodiversity\' measures reveal a decrease in taxonomic distinctness with increasing stress
A coral reef comprised of calcareous and non-calcareous organisms can be shown to act as a sink for atmospheric CO2 when excess (= net) production is high and CaC03 precipitation is low and this prediction is confirmed by the only existing measurement of air-sea CO2 flux in a coral reef system.
Taxonomic distinctness and environmental assessment
The objectives of this paper are to test the performance of the taxonomic distinctness index, δ+, in a number of environmental impact scenarios, to examine its relationship with functional diversity…
The taxonomic distinctness measure of biodiversity: weighting of step lengths between hierarchical levels
Using data on free-living marine nematodes from 16 localities/habitat types in the UK, it is shown that the relative values of taxonomic distinctness for the 16 sets are robust to variation in the definition of step length.