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Comparative Losses of British Butterflies, Birds, and Plants and the Global Extinction Crisis
A comparison at the national scale of population and regional extinctions of birds, butterflies, and vascular plants from Britain in recent decades is presented, strengthening the hypothesis that the natural world is experiencing the sixth major extinction event in its history.
The quality and isolation of habitat patches both determine where butterflies persist in fragmented landscapes
- J. Thomas, N. Bourn, B. Goodger
- Environmental ScienceProceedings of the Royal Society of London…
- 7 September 2001
Habitat quality is the missing third parameter in metapopulation dynamics, contributing more to species persistence, than site area or isolation, and a reorientation in conservation priorities is recommended.
The ecology of Myrmica ants in relation to the conservation of Maculinea butterflies
- G. Elmes, J. Thomas, J. Wardlaw, M. Hochberg, R. Clarke, D. J. Simcox
- Environmental Science, BiologyJournal of Insect Conservation
- 1 March 1998
The latest summary of field data showing the pattern of host specificity by Maculinea is presented, and the current knowledge of habitat partition, colony growth and colony reproduction within communities of Myrmica ants is summarized in relation to the ecology ofMaculinea species.
Successful Conservation of a Threatened Maculinea Butterfly
The reversal of the decline of Maculinea arion (Large Blue), a charismatic specialist whose larvae parasitize Myrmica ant societies is described, providing a paradigm for other insect conservation projects.
RIVPACS models for predicting the expected macroinvertebrate fauna and assessing the ecological quality of rivers
Long distance seed dispersal by wind: measuring and modelling the tail of the curve
An experimental protocol to measure long-distance dispersal involving measuring dispersal by wind from isolated individuals at a range of distances from the source, but maintaining a large and constant sampling intensity at each distance indicated under-estimation of the tail by standard empirical models and mechanistic models.
Confidence limits for regression relationships between distance matrices: Estimating gene flow with distance
There is growing interest in assessing relation ships between two or more distance matrices, where distances are based on genetic, geographical, and/or environmental measures of dissimilarity for all…
Accounting for nature: assessing habitats in the UK countryside.
DENSITY AND LINKAGE ESTIMATORS OF HOME RANGE: NEAREST‐NEIGHBOR CLUSTERING DEFINES MULTINUCLEAR CORES
A new linkage method is proposed, using nearest-neighbor distances first to exclude outlying locations and then to define a multinuclear outlier-exclusive range core (OEC) by cluster analysis, supported by data from radio-tagged Common Buzzards.
Derivation of a biological quality index for river sites: Comparison of the observed with the expected fauna
A method for the national assessment of the biological quality of river sites is developed. Multivariate discrimination, based on site environmental characteristics, is used on a biological…