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Bieringer, Georg

doi:10.1023/a:1023633911828

Cited by 55 publications

(4 citation statements)

References 33 publications

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“…Similar behavior was found with Ensifera species in north-eastern Italian meadows (Marini et al 2010). Shading-out is thought to be less harmful to Ensifera as many of them oviposit in plants and therefore are less negatively affected by shading than most Caelifera which tend to oviposit in the soil (Ingrisch and Köhler 1998;Bieringer and Zulka 2003). Accordingly, most Ensifera found in our study area were characteristic to medium and densely overgrown sample plots, whereas most Caelifera were found in sparsely to medium overgrown plots.…”

Section: Effect Of Bracken Cover On Species Richness and Abundancesupporting

confidence: 57%

Bracken fern (Pteridium aquilinum (L.) Kuhn) overgrowth on dry Alpine grassland impedes Red List Orthoptera but supports local orthopteran beta diversity

Schlegel

Riesen

2021

J Insect Conserv

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The native bracken fern (Pteridium aquilinum (L.) Kuhn) has become increasingly invasive in abandoned or undergrazed Alpine grasslands. Bracken stands are generally assumed to be poor in species, but there is still very little information about the impact on the fauna. We recorded Orthoptera communities of 24 sample plots with varying bracken cover. Compared to plots with only sparse or medium bracken cover, species richness was highly significantly lower in densely overgrown plots, while the former two did not differ markedly. Multivariate ordination analyses revealed gradients with unequal orthopteran communities, showing distinct patterns of bracken cover clustering. Based on indicator values, 13 of 23 Orthoptera species turned out to be significantly or marginally significantly associated with a single bracken cover stratum or a combination of two strata, whereby all nine Red List species were primarily restricted to sparse or medium bracken cover. However, some generalist species were found to favor denser bracken stands, such as Tettigonia viridissima, contributing to the local Orthoptera beta diversity. Our data suggest that ongoing rotational sheep grazing with temporary paddocks is regarded as the most preferable management system. However, selected parts of the study area, which have only sparse vegetation and no pressure of bracken or scrub overgrowth, are recommended to be alternately left ungrazed for a few years to allow for the coexistence of different successional stages. Low-intensity bracken control measures, situationally by mowing or uprooting, are considered appropriate and should be pursued. Implications for insect conservation Even though most specialized and rare Orthoptera species in Western Europe tend to prefer sparsely vegetated areas, subareas with medium to even dense vegetation cover might promote certain generalist species, leading to a higher local species richness.

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Section: Effect Of Bracken Cover On Species Richness and Abundancesupporting

confidence: 57%

Bracken fern (Pteridium aquilinum (L.) Kuhn) overgrowth on dry Alpine grassland impedes Red List Orthoptera but supports local orthopteran beta diversity

Schlegel

Riesen

2021

J Insect Conserv

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“…Braschler et al (2009) found that cricket (Ensifera) density was higher in fragmented plots, as uncut patches of grassy vegetation play an important role in maintaining insect diversity in the agricultural landscape by offering shelter from predators and serving as mating and egg laying sites. A previous study by Bieringer and Zulka (2003) showed that orthopteran species richness increases with distance to forest edge. We believe that the positive effect of arable land in our study was not simply because the bush-crickets avoided forest, but rather that agricultural areas contain a larger amount of suitable grassland vegetation than forests.…”

Section: B) A) Discussionmentioning

confidence: 90%

Modelling the distribution of the invasive Roesel’s bush-cricket (Metrioptera roeselii) in a fragmented landscape

Lundhagen¹,

Berggren²

2011

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The development of conservation strategies to mitigate the impact of invasive species requires knowledge of the species ecology and distribution. This is, however, often lacking as collecting biological data may be both time-consuming and resource intensive. Species distribution models can offer a solution to this dilemma by analysing the species-environment relationship with help of Geographic information systems (GIS). In this study, we model the distribution of the non-native bush-cricket Metrioptera roeselii in the agricultural landscape in mid-Sweden where the species has been rapidly expanding in its range since the 1990s. We extract ecologically relevant landscape variables from Swedish CORINE land-cover maps and use species presence-absence data from large-scale surveys to construct a species distribution model (SDM). The aim of the study is to increase the knowledge of the species range expansion pattern by examining how its distribution is affected by landscape composition and structure, and to evaluate SDM performance at two different spatial scales. We found that models including data on a scale of 1 × 1 km were able to explain more of the variation in species distribution than those on the local scale (10 m buffer on each side of surveyed road). The amount of grassland in the landscape, estimated from the area of arable land, pasture and rural settlements, was a good predictor of the presence of the species on both scales. The measurements of landscape structure – linear elements and fragmentation - gave ambivalent results which differed from previous small scaled studies on species dispersal behaviour and occupancy patterns. The models had good predictive ability and showed that areas dominated by agricultural fields and their associated grassland edges have a high probability being colonised by the species. Our study identified important landscape variables that explain the distribution of M. roeselii in Mid-Sweden that may also be important to other range expanding orthopteran species. This work will serve as a foundation for future analyses of species spread and ecological processes during range expansion

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“…In fallows, a high and dense shrub cover likely resulted in more shade and hence lower maximum temperatures near the ground. As pointed out by Bieringer and Zulka (2003) [ 49 ], shading of the soil surface can be a serious threat for many thermophilous Caelifera species since they require sun-exposed bare ground and high ambient temperatures to complete their life cycles [ 49 , 50 ]. In particular, for critically endangered O. germanica that colonizes hot and dry vegetation-free and rocky habitats and is sensitive to denser vegetation, ongoing succession strongly reduces habitat quality [ 28 ].…”

Section: Discussionmentioning

confidence: 99%

“…In particular, for critically endangered O. germanica that colonizes hot and dry vegetation-free and rocky habitats and is sensitive to denser vegetation, ongoing succession strongly reduces habitat quality [ 28 ]. On the contrary, Ensifera species were less affected by the presence of shrubs since they are less sensitive to cooler temperatures and denser vegetation structures for completing their life cycles [ 49 ] and are further known to persist better in transitional habitats with ongoing succession [ 51 ]. However, the cover of SNHs (foremost vineyard fallows) in the surrounding landscape still negatively affected Ensifera density, while Ensifera species number was positively correlated with an increased distance to SNH at the landscape scale, indicating that this group may be able to persist in these habitats but may still depend on grassy and herbaceous sites at the landscape scale [ 52 ].…”

Section: Discussionmentioning

confidence: 99%

Orthopteran Diversity in Steep Slope Vineyards: The Role of Vineyard Type and Vegetation Management

Wersebeckmann

Biegerl

Leyer

et al. 2023

Insects

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The abandonment of traditional agricultural practices and subsequent succession are major threats to many open-adapted species and species-rich ecosystems. Viticulture on steep slopes has recently suffered from strong declines due to insufficient profitability, thus increasing the area of fallow land considerably. Changing cultivation systems from vertically oriented to modern vineyard terraces offers an opportunity to maintain management economically viable and thus reduces further abandonment. Hillside parallel terraces favor mechanization, and their embankments offer large undisturbed areas that could provide valuable habitats. We investigated the effects of vineyard abandonment, different vineyard management types (vertically oriented vs. terraced), and local parameters on Orthoptera diversity in 45 study sites along the Upper Middle Rhine Valley in Germany. Our results show that woody structures and vineyard abandonment reduced Orthoptera diversity at the local and landscape scale due to decreased habitat quality, especially for open-adapted species. In contrast, open inter-rows of actively managed vineyard types supported heat-adapted Caelifera species. On terrace embankments, extensive management and taller vegetation benefited Ensifera species, while short and mulched vegetation in vertically oriented vineyards favored the dominance of one single Caelifera species. Our results highlight the significance of maintaining viticultural management on steep slopes for the preservation of both open-adapted Orthoptera species and the cultural landscape.

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Untitled

Cited by 55 publications

References 33 publications

Bracken fern (Pteridium aquilinum (L.) Kuhn) overgrowth on dry Alpine grassland impedes Red List Orthoptera but supports local orthopteran beta diversity

Bracken fern (Pteridium aquilinum (L.) Kuhn) overgrowth on dry Alpine grassland impedes Red List Orthoptera but supports local orthopteran beta diversity

Modelling the distribution of the invasive Roesel’s bush-cricket (Metrioptera roeselii) in a fragmented landscape

Orthopteran Diversity in Steep Slope Vineyards: The Role of Vineyard Type and Vegetation Management

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