Habitat Characteristics and Grasshopper Community Dynamics on Mixed-Grass Rangeland

Quinn, Mark; Kepner, R. L.; Walgenbach, D. D.; Bohls, R. A.; Pooler, P. D.; Foster, R. Nelson; Reuter, K. C.; Swain, J. L.

doi:10.4039/ent12389-1

Cited by 26 publications

(21 citation statements)

References 34 publications

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“…In shortgrass prairie of Arizona, grasshopper species richness was variable and related to the mix of annual and perennial food plants (Pfadt 1982). On mixed-grass rangeland in South Dakota, Quinn et al (1991) found that between-year changes in community composition of rangeland grasshoppers were positively correlated with the percentage cover of total grasses and forbs. On mixed-grass rangeland in South Dakota, Quinn et al (1991) found that between-year changes in community composition of rangeland grasshoppers were positively correlated with the percentage cover of total grasses and forbs.…”

Section: Discussionmentioning

confidence: 97%

Efficacy of Esfenvalerate for Control of Insects Harmful to Seed Production in Disease-Resistant Western White Pines

et al. 1994

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The Canadian Entomologist 126: 1075-1092 (1994) Rangeland grasshopper species richness was monitored at 10 sites in Montana, U.S.A., during 1986 through 1992, which included an extreme drought year (1988). We observed significant post-1988 drought reductions in rangeland grasshopper species richness in the eastern and south-central region of Montana where drought intensity has been increasing during the past 20 years. In the north-central region, which also experienced the 1988 drought but showed no long-term drought trend, we did not observe a postdrought reduction in overall rangeland grasshopper species richness. Thus, in terms of rangeland grasshopper species richness, the potential impact of a severe drought in a given year may depend on the timing of such an event within longer-term climatic cycles. Our findings suggest that as regional drought intensity increases temporally, there may be an increased likelihood that a single extreme drought year will not only have a profound impact on abundance but may also result in significant long-term reduction of grasshopper species richness. Our results support the hypothesis that resource limitation is a very important factor in structuring rangeland grasshopper communities in space and time. Kemp, W.P., et M.M. Cigliano. 1994. La skcheresse et la diversite des criquets dans les zones de p2turage. The Canadian Entomologist 126: 1075-1092.

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Section: Discussionmentioning

confidence: 97%

Efficacy of Esfenvalerate for Control of Insects Harmful to Seed Production in Disease-Resistant Western White Pines

et al. 1994

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“…Habitat preference is determined by numerous factors including food sources, predator-free space, oviposition sites, and optimal thermoregulatory sites (cf. Chappell 1983;Whitman 1987;Quinn et al 1991). Soil characteristics may also affect species distribution and the prevalent orthopteroid assemblage structure (Isely 1937(Isely , 1938Johnson 1989;Quinn et al 1991).…”

Section: Species Compositionmentioning

confidence: 99%

“…Eggs of such species absorb more water when it is available, and show lower water loss during drought periods (Ingrisch 1983). Because of the differing ability of orthopterans to respond to habitat conditions (Quinn et al 1991), it was hypothesized that the orthopteran assemblage structure would also change along a moisture gradient.…”

Section: Species Compositionmentioning

confidence: 99%

A comparative study on orthopteroid assemblages along a moisture gradient in the Western Carpathians

2007

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Orthopteroid assemblages (orders Orthoptera and Mantodea) were compared along moisture gradient at five sites of the Slovak Karst in southern Slovakia. A total of 40 species were recorded by sweep-net sampling. The occurence of each identified species varied with soil moisture and other factors. Sites with similar moisture conditions tend to have similar assemblages. No species occurred simultaneously at the wettest and driest sites. There were two principal and five subordinate assemblages within the moisture gradient. Assemblages were related to the two commonest habitat types demarcated by the presence of different indicator species. Total orthopteroid species richness and number of grasshopper (Acridoidea) species increased linearly with falling soil moisture and Ellenberg's indicator value for moisture.

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“…Habitat heterogeneity, defined as variation in plant diversity, plant architecture, plant composition, and other habitat variables, has long been recognized as an important determinant of arthropod diversity and community structure at several spatial scales (Strong et al 1984, Huston 1994, Dennis et al 1998, Haddad et al 2001. Relationships between plant coverage and diversity and arthropod community composition in grasslands have been established for grasshoppers (Otte 1976, Quinn et al 1991a, ground beetles (Quinn et al 1991b), darkling beetles ), spider wasps (Quinn et al Ecological Applications Vol. 14,No.…”

Section: Possible Causes Of Fragmentation Effectsmentioning

confidence: 99%

Influence of Habitat Fragmentation and Crop System on Columbia Basin Shrubsteppe Communities

Quinn

2004

Ecological Applications

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Crop production in much of the western United States has caused extensive fragmentation of shrubsteppe and other grasslands and has increased regional levels of disturbance through repeated tillage of crop fields and applications of agrochemicals. Although there have been numerous studies of the effects of fragmentation on arthropods in forests, old fields, and cropland, there have been very few studies of fragmentation effects on grassland arthropods. I conducted a two‐year study in the Columbia Basin region of the U.S. Pacific Northwest to determine the effects of fragmentation and regional disturbance on shrubsteppe communities. I sampled plants and arthropods in 20 shrubsteppe fragments associated with annual crops, 20 fragments associated with perennial crops, and 20 large sections of shrubsteppe distant from crop fields. Fragments were corners of crop irrigation circles, and only sites that were undisturbed, with an apparent high coverage of shrubs, were included in the study. Results indicated no significant differences in coverages of shrubs, perennial grasses, total perennial forbs, total annual/biennial forbs, and species richness of grasses and shrubs between fragments and large sections of shrubsteppe. Mean percent coverage of the annual grass Bromus tectorum was 18.6% greater in small fragments than in large sections of shrubsteppe distant from crop fields, and mean coverage of bare ground was 22.9% higher and coverage of biological soil crusts was 41.5% lower in the fragments than in large shrubsteppe sections. Shrubsteppe fragments had significantly lower abundances of obligate herbivores, omnivores, total herbivores, obligate predators, total predators, plant detritivores, total detritivores, and butterflies, as well as fewer individuals of numerous other taxa within these trophic groups. Fragmentation had very little effect on species richness within trophic groups, probably because fragments were not that isolated from each other and large sections of shrubsteppe. Shrubsteppe communities that were next to highly disturbed annual crops had greater coverages of total annual/biennial forbs, and lower coverages of total perennial forbs and biological soil crusts when compared to shrubsteppe near perennial crops. Abundances of obligate herbivores, omnivores, total predators, plant detritivores, vertebrate‐detritus feeders, and bees were similar in shrubsteppe near annual crops and near perennial crops. However, within these trophic groups, shrubsteppe near annual crops supported fewer obligate shrub‐feeding grasshoppers, herbivorous ground beetles, harvestmen, antlions, darkling beetles, and butterflies than did shrubsteppe near perennial crops. The results suggest that a reduction in resources within fragments and regional disturbances caused by the production of annual crops were responsible for changes in arthropod trophic structure in fragments. Changes in trophic structure were probably not due to reductions in habitat heterogeneity or habitat isolation because plant community structure was simil...

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Habitat Characteristics and Grasshopper Community Dynamics on Mixed-Grass Rangeland

Cited by 26 publications

References 34 publications

Efficacy of Esfenvalerate for Control of Insects Harmful to Seed Production in Disease-Resistant Western White Pines

Efficacy of Esfenvalerate for Control of Insects Harmful to Seed Production in Disease-Resistant Western White Pines

A comparative study on orthopteroid assemblages along a moisture gradient in the Western Carpathians

Influence of Habitat Fragmentation and Crop System on Columbia Basin Shrubsteppe Communities

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