Search Results - "Clarke, K. R"

Global analysis of response and recovery of benthic biota to fishing by Kaiser, M. J., Clarke, K. R., Hinz, H., Austen, M. C. V., Somerfield, P. J., Karakassis, I.

“…Towed bottom-fishing gears are thought to constitute one of the largest global anthropogenic sources of disturbance to the seabed and its biota. The current…”
Get full text

A further biodiversity index applicable to species lists: variation in taxonomic distinctness by Clarke, K. R., Warwick, R. M.

“…A further biodiversity index is proposed, based on taxonomic (or phylogenetic) relatedness of species, namely the ‘variation in taxonomic distinctness’ (VarTD,…”
Get full text

A Taxonomic Distinctness Index and its Statistical Properties by Clarke, K. R., Warwick, R. M.

“…1. For biological community data (species-by-sample abundance matrices), Warwick & Clarke (1995) defined two biodiversity indices, capturing the structure not…”
Get full text

Taxonomic Distinctness and Environmental Assessment by Warwick, R. M., Clarke, K. R.

“…1. 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…”
Get full text

Dispersion-based weighting of species counts in assemblage analyses by Clarke, K. R., Chapman, M. G., Somerfield, P. J., Needham, H. R.

“…Multivariate analysis of species assemblage data often begins with transformation of abundances, to downweight contributions from dominant taxa to Bray-Curtis…”
Get full text

Importance of Regional, System-Wide and Local Spatial Scales in Structuring Temperate Estuarine Fish Communities by Valesini, F. J, Tweedley, J. R, Clarke, K. R, Potter, I. C

“…An extensive literature base worldwide demonstrates how spatial differences in estuarine fish assemblages are related to those in the environment at…”
Get full text

The taxonomic distinctness measure of biodiversity: weighting of step lengths between hierarchical levels by Clarke, K. R., Warwick, R. M.

“…Taxonomic distinctness is a univariate (bio)diversity index which, in its simplest form, calculates the average 'distance' between all pairs of species in a…”
Get full text

A method of linking multivariate community structure to environmental variables by Clarke, K. R., Ainsworth, M.

“…The method of choice for multivariate representation of community structure is often non-metric multi-dimensional scaling (MDS). This has great flexibility in…”
Get full text

Benthic macroinvertebrates as indicators of environmental deterioration in a large microtidal estuary by Wildsmith, M.D., Rose, T.H., Potter, I.C., Warwick, R.M., Clarke, K.R.

“…► Benthic macroinvertebrate fauna in the Swan-Canning Estuary has changed since the 1980s. ► The densities and number of species of crustaceans have declined…”
Get full text

Effects of CO₂ induced seawater acidification on infaunal diversity and sediment nutrient fluxes by Widdicombe, S., Dashfield, S. L., McNeill, C. L., Needham, H. R., Beesley, A., McEvoy, A., Øxnevad, S., Clarke, K. R., Berge, J. A.

“…A mesocosm experiment was conducted to quantify the effects of short- (2 wk) and long-term (20 wk) exposure to acidified seawater on the structure and…”
Get full text

Taxonomic Distinctness as a Measure of Diversity Applied over a Large Scale: The Benthos of the Norwegian Continental Shelf by Ellingsen, K. E., Clarke, K. R., Somerfield, P. J., Warwick, R. M.

“…1. Data on soft-sediment macrobenthos from the Norwegian continental shelf (56-71°N) was used to examine the use of average taxonomic distinctness (Δ+, a…”
Get full text

Ecological consequences of dredged material disposal in the marine environment: A holistic assessment of activities around the England and Wales coastline by Bolam, S.G., Rees, H.L., Somerfield, P., Smith, R., Clarke, K.R., Warwick, R.M., Atkins, M., Garnacho, E.

“…This study provides a holistic perspective on the ecological effects of dredged material disposal, both intertidally and subtidally. A number of numerical…”
Get full text

Quantifying Structural Redundancy in Ecological Communities by Clarke, K. R., Warwick, R. M.

“…In multivariate analyses of the effects of both natural and anthropogenic environmental variability on community composition, many species are interchangeable…”
Get full text

Changes in the benthic macroinvertebrate fauna of a large microtidal estuary following extreme modifications aimed at reducing eutrophication by Wildsmith, M.D., Rose, T.H., Potter, I.C., Warwick, R.M., Clarke, K.R., Valesini, F.J.

“…An artificial channel was opened in 1994 between the microtidal Peel–Harvey Estuary and the Indian Ocean to increase tidal exchange and thus ameliorate the…”
Get full text

inshore fish faunas over soft substrates and reefs on the tropical west coast of Australia differ and change with latitude and bioregion by Travers, M. J., Potter, I. C., Clarke, K. R., Newman, S. J., Hutchins, J. B.

“…To test the following hypotheses regarding ichthyofaunal compositions along an extensive tropical coastline. The compositions over soft substrates and reefs:…”
Get full text

Structural and functional response of soil microbiota to addition of plant substrate are moderated by soil Cu levels by Wakelin, Steven Alan, Chu, Guixin, Broos, Kris, Clarke, K. R, Liang, Yongchao, McLaughlin, Mike J

“…In soils, the microbially mediated decomposition of plant residue is a key process with wide ranging effects on ecosystem functioning and stability…”
Get full text

Changes in coral reef communities among the Florida Keys, 1996–2003 by Somerfield, P. J., Jaap, W. C., Clarke, K. R., Callahan, M., Hackett, K., Porter, J., Lybolt, M., Tsokos, C., Yanev, G.

“…Hard coral (Scleractinia and Milleporina) cover data were examined from 37 sites surveyed annually from 1996 to 2003 in the Florida reef tract, USA. Analyses…”
Get full text

Spatial and seasonal variations in the ecological characteristics of the free-living nematode assemblages in a large microtidal estuary by Hourston, M., Potter, I.C., Warwick, R.M., Valesini, F.J., Clarke, K.R.

“…This study has determined the ways in which the density, number of species, species composition and trophic structure of free-living nematode assemblages in…”
Get full text

Solving some statistical problems in analyses of experiments on choices of food and on associations with habitat by Underwood, A.J., Clarke, K.R.

“…Statistical tests for non-random associations with components of habitat or different kinds of prey require information about the availability of sub-habitats…”
Get full text

Spatial scale and benthic community organisation in the littoral zones of large oligotrophic lakes: potential for cross-scale interactions by STOFFELS, R. J., CLARKE, K. R., CLOSS, G. P.

“…Summary 1. We studied the spatial organisation of littoral, benthic invertebrate communities in two large oligotrophic lakes with very extensive heterogeneous…”
Get full text