Population dynamics of adult and larval Carabid beetles in a maize field and its boundary

Desender, Konjev; Alderweireldt, Mark

doi:10.1111/j.1439-0418.1988.tb00559.x

Cited by 44 publications

(10 citation statements)

References 6 publications

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“…Prolonged and more intensive trapping might also have resulted in fewer unique RTU. Factors affecting the temporal density of organisms, such as breeding season and hibernation, could result in different patterns emerging in different seasons (Coombes & Sotherton 1986; Desender & Alderweireldt 1988; Kromp & Steinberger 1992). Factors other than land use could have affected the differences between localities.…”

Section: Discussionmentioning

confidence: 99%

Comparing biodiversity between protected areas and adjacent rangeland in xeric succulent thicket, South Africa: arthropods and reptiles

Fabricius

Burger

Hockey

2003

Journal of Applied Ecology

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Summary 1.Although it is widely assumed that protected areas conserve species that would not survive elsewhere, this assumption is seldom tested. The aim of the study was to determine the respective roles of a nature reserve and commercial and subsistence rangeland in preserving terrestrial arthropods and reptiles in xeric succulent thicket in the Eastern Cape, South Africa. 2. Faunal diversity on a nature reserve (the Great Fish River Reserve Complex) was compared with a historically overgrazed commercial farm, an intensively managed, conservatively stocked commercial farm and a communal grazing area. Terrestrial arthropods and reptiles were caught in paired pitfall traps inside and outside the nature reserve, specimens being sorted into recognizable taxonomic units (RTU). The taxa occurring in each land management unit were compared using RTU diversity, a hierarchical richness index (HRI), community similarity and uniqueness. 3. The nature reserve contained more RTU and a greater HRI than adjacent land for most arthropod groups, and also supported more unique taxa than the other study localities. 4. Snakes and lizards, in contrast, were almost twice as abundant in the communal grazing area as elsewhere, although reptile species diversity was similar at all localities. 5. Each individual locality contained fewer than 62% of the total number of arthropod RTU and 55% of the total reptile RTU; the communal grazing area contained only 37% of the total number of arthropod RTU collected in the study area. 6. Nineteen (73%) of the ant, 18 (69%) of the weevil, 60 (70%) of the spider and 12 (60%) of the grasshopper RTU and 10 (66%) of the reptiles were shared by the three land uses. Six new weevil species and probably several new arachnid species were collected, but all the new weevils were confined to the nature reserve. 7. The communal grazing area differed most from the nature reserve in richness and community composition, followed by the conservatively stocked commercial farm. The historically overgrazed commercial farm was most similar to the nature reserve. 8. The communal grazing area was characterized by xeric-adapted reptiles and predatory arthropods whose ranges are centred in the semi-arid parts of South Africa. In contrast, the nature reserve and commercial farms supported more mesic-adapted reptiles and herbivorous arthropods. 9. Synthesis and applications. The data show how protected areas are key to conserving those species that decrease under heavily grazed and disturbed conditions. However, they also illustrate that diverse land-use mosaics promote gamma diversity in the xeric succulent thicket of South Africa. Conservation policies that include protected space in the wider environment and conserve habitat diversity are likely to both promote regional richness and support scarce species.

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Section: Discussionmentioning

confidence: 99%

Comparing biodiversity between protected areas and adjacent rangeland in xeric succulent thicket, South Africa: arthropods and reptiles

Fabricius

Burger

Hockey

2003

Journal of Applied Ecology

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“…Among the abundant carabid species, A. mülleri is a known predator (Hengeveld, 1980), and this species, together with P. anthracinus were observed to kill aphids and dipteran larvae in the laboratory (Frank, unpublished). Moreover, C. fossor is considered a predator even though it may sometimes be injurious to arable crops (see Desender & Alderweireldt, 1988). Overall, it must be stated that the sampling design used had a low power to resolve differences between the four habitat types studied.…”

Section: Discussionmentioning

confidence: 99%

Staphylinidae and Carabidae overwintering in wheat and sown wildflower areas of different age

Frank

Reichhart

2004

Bull. Entomol. Res.

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Species richness and abundance of staphylinid and carabid beetles overwintering in winter wheat fields and 1-to 3-year-old wildflower areas were investigated during 2000/2001 on 16 study sites in Switzerland. Abundance and species richness of overwintering staphylinids significantly increased with successional age of the wildflower areas and were always higher in older wildflower areas than in winter wheat. A similar but less distinct pattern was observed for the abundance and species richness of carabid beetles. The influence of habitat parameters (vegetation cover, fine sand content, organic matter, pH, soil pore volume, surrounding landscape structure, habitat area) on the staphylinid and carabid assemblages based on the number of individuals per species and site was analysed using canonical correspondence analysis. Vegetation cover was the most significant parameter significantly characterizing both staphylinid and carabid assemblages. The amount of vegetation cover explained 15.7% of the variance, fine sand content accounted for 13.3% and surrounding landscape structure for 10.9% of the variance in the staphylinid assemblage. In the carabid assemblage, vegetation cover was the only significant factor, explaining 24.7% of the variance. This study showed for the first time that the significance of wildflower areas as a reservoir for hibernation for generalist predatory beetles increases with progressing successional age.

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“…Durkis & Reeves (1982) and Smith (1976) incorporated barriers that intercept and then guide arthropods towards pitfall traps. Similar barriers, termed 'guiding plates' have also been used in fenced pitfall trap studies (Desender & Alderweireldt, 1988;Holland & Smith, 1999). Both these designs could be improved; Durkis and Reeve's directional design fails to trap arthropods travelling parallel to the barrier, whilst Smith's design is as likely to direct arthropods encountering the barrier away from as towards the pitfall trap.…”

Section: Introductionmentioning

confidence: 99%

The use of barrier‐connected pitfall trapping for sampling predatory beetles and spiders

Winder

Holland

Perry

et al. 2001

Entomologia Exp Applicata

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The efficiency of barrier-connected pitfall trapping was compared to conventional single traps or arrays. For ground-active beetles, the use of a pitfall system incorporating a wetting agent with five traps arranged in a cross formation connected by plastic barriers was more efficient than a single dry trap by at least an order of magnitude and at least twice as efficient as five traps without connecting barriers. It is argued that the efficiency of pitfall trapping may be improved markedly by using barrier-connected traps, particularly for some carabid and staphylinid beetles and lycosid spiders. Capture of linyphiids was not improved by the use of barriers and was dependent only on the use of wetting agent and number of traps used.

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Population dynamics of adult and larval Carabid beetles in a maize field and its boundary

Cited by 44 publications

References 6 publications

Comparing biodiversity between protected areas and adjacent rangeland in xeric succulent thicket, South Africa: arthropods and reptiles

Comparing biodiversity between protected areas and adjacent rangeland in xeric succulent thicket, South Africa: arthropods and reptiles

Staphylinidae and Carabidae overwintering in wheat and sown wildflower areas of different age

The use of barrier‐connected pitfall trapping for sampling predatory beetles and spiders

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