Topic
Carabus problematicus
About: Carabus problematicus is a research topic. Over the lifetime, 19 publications have been published within this topic receiving 257 citations.
Papers
TL;DR: Mandible tip length has been used to estimate the age of individual C.problematicus Herbst, suggesting that recently emerged males may inseminate second year females and also that the male life‐cycle is predominantly annual over the whole altitude range studied.
Abstract: .
1
Mandible tip length has been used to estimate the age of individual C.problematicus Herbst caught over an altitude range of more than 700 m in northern England.
2
At 100 m the great majority of females laid eggs in the summer of their emergence as adults. The female life-cycle is predominantly annual and 24% only of the egg-bearing individuals were in their second year.
3
Above 250 m, most females did not reproduce until the summer of the year following emergence, giving a biennial life-cycle. 96% of egg-bearing females caught above 830 m were in their second year.
4
All the males caught during the breeding season at 100 m had emerged within that calendar year and it is concluded that the male life-cycle is annual at this altitude.
5
Above 250 m, 83% of the males caught during the breeding season were in their first calendar year, suggesting that recently emerged males may inseminate second year females and also that the male life-cycle is predominantly annual over the whole altitude range studied.
6
At the higher temperatures of the lowland site females not only produce eggs in the year of emergence, they also produce more eggs per individual than at the higher sites. Egg production depends on food intake which involves mandible wear and individuals at the lowland site have significantly higher rate of mandible wear than at the sites above 250 m.
43 citations
TL;DR: In each of the three habitat types some species varied very little in abundance and others, very widely, it seems that the amplitude of fluctuations in abundance is a feature of each single species rather than a special attribute of their habitats.
22 citations
TL;DR: This study identifies characteristic species of the successional stages within heathlands, and finds the traits which are characteristic of species in burnt areas versus areas dominated by older heath stands.
Abstract: Fire is a widespread management practice used in the maintenance of European heathland. Frequent prescribed burns in small patches have been shown to benefit carabid communities; however, how fire favours specific life-history traits is poorly understood.
In this study, we identify characteristic species of the successional stages within heathlands, and find the traits which are characteristic of species in burnt areas versus areas dominated by older heath stands.
We identify 10 species as indicator species for heathland in the pioneer stage (0–5 years old); Amara lunicollis, Bembidion lampros, Calathus fuscipes, Carabus problematicus, Cicindela campestris, Nebria salina, Notiophilus aquaticus, Poecilus cupreus, P. lepidus and P. versicolor. Dyschirius globosus is identified as an indicator for the building stage (6–14 years old), and Carabus violaceus as an indicator for the mature stage (15–25 years old).
Moisture preference and diet are identified as traits that determine species response to prescribed fire. Collembolan specialists and species with no moisture preference are shown to be most abundant in burnt patches, whereas generalist predators and species with a high moisture preference are less tolerant of fire.
Knowledge of species sorting along a prescribed fire gradient can provide valuable information for heathland conservation.
21 citations
TL;DR: Ten microsatellite loci are isolated and characterized in the ground beetle Carabus nemoralis (Coleoptera, Carabidae), an ubiquist species largely distributed in Europe.
Abstract: We isolated and characterized 10 microsatellite loci in the ground beetle Carabus nemoralis (Coleoptera, Carabidae), an ubiquist species largely distributed in Europe. Polymorphism ranged from 3 to 12 alleles on the 30 individuals from the same locality examined.
19 citations
TL;DR: The results indicate that gene flow among suitable habitat patches is primarily reduced by the inability of this specialised species to traverse the landscape matrix, and suggests that present populations can best be protected by securing or increasing the size of existing habitat patches.
Abstract: Old growth temperate broadleaved forests are characterised by a large proportion of forest specialists with low dispersal capability. Hence, spe- cies bound to this habitat are expected to be highly susceptible to the effects of decreasing patch size and increasing isolation. 2. Here, we investigate the relative effect of both factors by genotyping indi- viduals of a flightless and forest specialist beetle Carabus problematicus from 29 populations, sampled in 21 different forest fragments in Belgium, at eight microsatellite loci. 3. A high degree of genetic differentiation among fragments was observed, with populations from smaller forests being considerably more differentiated and characterised by a lower genetic diversity compared to those of larger forests. 4. A more detailed study on forest remnants of a former historic continuous woodland area revealed that population differentiation was high among, but not within remnants, irrespective of geographical distance. This suggests that patch fragmentation rather than geographical distance is the ultimate factor that hampers gene flow in this species. 5. The results indicate that gene flow among suitable habitat patches is primarily reduced by the inability of this specialised species to traverse the land- scape matrix. This lack of dispersal may pose a serious threat for the persistence of C. problematicus and ecologically similar species, and suggests that present populations can best be protected by securing or increasing the size of existing habitat patches.
18 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2020 | 1 |
| 2016 | 1 |
| 2013 | 1 |
| 2011 | 1 |
| 2010 | 1 |
| 2009 | 1 |