Species decline—but why? Explanations of carabid beetle (Coleoptera, Carabidae) declines in Europe

  title={Species decline—but why? Explanations of carabid beetle (Coleoptera, Carabidae) declines in Europe},
  author={D. Johan Kotze and Robert B. O’Hara},
We investigated some of the causes of ground beetle decline using atlas data from Belgium, Denmark and the Netherlands, countries in which natural environments have all but disappeared. We used ordinal regression to identify characteristics that are significantly correlated with the decline of carabid beetle species over the last 50–100 years, using a stepwise selection procedure to select the optimal model according to the Akaike Information Criterion. The results showed that large-bodied… 
Testing abundance-range size relationships in European carabid beetles (Coleoptera, Carabidae)
Examination of species’ characteristics revealed that widespread species are generally large bodied, generalists and are little influenced by human-altered landscapes, while species with restricted distributions are smaller bodies, specialists, and favour natural habitat.
Fecundity determines the extinction threshold in a Canadian assemblage of longhorned beetles (Coleoptera: Cerambycidae)
A strong negative relationship between reproductive rate and the minimum habitat amount required for species presence is found and can inform predictions of which species will be most affected by habitat loss.
Analysis of geographic centrality and genetic diversity in the declining grasshopper species Bryodemella tuberculata (Orthoptera: Oedipodinae)
Human-induced ecological and climatic changes have led to the decline and even local extinction of many formerly widely distributed temperate and cold-adapted species. Determining the exact causes of
The occurrence and distribution of carabid beetles (Carabidae) on islands in the Baltic Sea: a review
  • D. J. Kotze
  • Environmental Science
    Journal of Insect Conservation
  • 2008
The conservation value of highly threatened cultural landscapes on Baltic Sea islands, such as species rich wooded meadows, is discussed as well as the possible negative effects of climate change on carabid beetles.
Where have all the beetles gone? Long‐term study reveals carabid species decline in a nature reserve in Northern Germany
The results suggest that the drivers for the insect decline and the responses are multifaceted, and highlights the importance of long‐term studies with identification of the catches to, at best, species level to support the understanding of mechanisms driving changes in insect diversity and abundance.
The effect of local anthropogenic habitat heterogeneity on assemblages of carabids (Coleoptera, Caraboidea) endemic to the Alps
It is suggested that local ground beetle species diversity strongly depends on small-scale anthropogenic variables ( namely habitat type, stone density and grazing intensity), and that habitat modifications (namely from forest to shrubbery) may significantly affect species movement patterns.
Assemblage Characteristics and Habitat Specificity of Carabid Beetles in a Japanese Alpine-Subalpine Zone
In lowland areas of the world and high-altitude European mountains, the species compositions, body sizes, and wing forms of carabid beetles are known to change according to vegetation structures.
Carabid beetle (Coleoptera: Carabidae) richness and functional traits in relation to differently managed grasslands in the Alps
The results support the hypothesis that agroecosystem practices in alpine grasslands influence carabid beetle communities and suggest that the preservation of natural grasslands and the implementation of grazing should be promoted during the planning of agroECosystem mosaics.


On the significance of dispersal power for populations of carabid-beetles (Coleoptera, Carabidae)
The hypothesis is proposed, that populations facing a high risk of extinction generally will have a sufficient chance of founding populations (high “turnover”) when “investing” extensively in dispersal.
Dynamics of local expansion by an introduced species: Pterostichus melanarius Ill. (Coleoptera, Carabidae) in Alberta, Canada
The overall proportion of flightless, brachypterous individuals captured at the study site increased from 39% in 1991 and 1992 to 57% in 1997, supporting the hypothesis that the proportion of SW individuals will increase with time since establishment of a population, and indicates that dispersal from the road verge into the forest has taken place primarily through flight.
Carabid beetles (Coleoptera: Carabidae) and habitat fragmentation: a review
It appears that at least in the Northern Hemisphere there is enough data about carabids for them to be fruitfully used to signal changes in land use practices, and landscape homogenisation should be avoided by maintaining heterogeneity of habitat types.
The habitat templet and life history strategies of pond skaters (Heteroptera: Gerridae): reproductive potential, phenology, and wing dimorphism
Overwintered females of species from temporary habitats lived longer than those from more permanent habitats, and, concomitantly, are able to spread reproduction over several ponds, suggesting that values observed are good measures of reproductive potential.
Distribution and abundance of an exotic ground-beetle (Carabidae): a test of community impact.
The proportion of macropterous individuals of this dimorphic species increased from ca.
Ecology and behavior of ground beetles (Coleoptera: Carabidae).
The ground beetles from the speciose beetle family Carabidae and, since their emergence in the Tertiary, have populated all habitats except deserts and may be important natural enemies of agricultural pests.
Metapopulation structure of Pterostichus lepidus and Olisthopus rotundatus on heathland in the Netherlands: the results from transplant experiments.
The suitability of patches for invertebrates within a metapopulation structure found unoccupied by species with low dispersal ability is investigated.
Which traits of species predict population declines in experimental forest fragments
Species that occur naturally at low abundance are more likely to decline as a result of fragmentation than are abundant species and isolated, rare, or predaceous species will be lost first from fragmented landscapes.