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Traditional grazing management creates heterogeneous swards and fosters grasshopper densities

Insect Science 2022年第6期29卷 1805-1818页

作者： Cinja Schwarz Thomas Fartmann Department of Biodiversity and landscape Ecology Faculty of Biology and ChemistryOsnabruck UniversityOsnabruckGermany

Common pastures were once the dominant type of land use in many Euro-pean ***,during the past 150 years,they have declined *** studies have shown that they are hotspots for rare plant,butterfly,and bird species in the study area,the Bavarian pre-Alps(southern Germany).However,studies on the value of these pastures for Orthoptera(hereinafter termed"grasshoppers")have been ***,we studied the effects of traditional summer grazing in common pastures on grasshopper *** study revealed that grasshopper species richness did not differ between common pastures(n=57)and controls(n=57).By contrast,density of all and of threat-ened species varied between common pastures and controls in all plots and within the two vegetation types with the highest grasshopper abundance,grasslands on mineral soil and *** threatened species,Pseudochorthippus montanus and Stethophyma grossum,were identified as indicators for common pastures;controls had no indicative *** low-intensity grazing in common pastures has resulted in open and heteroge-neous swards with some bare ground,a low cover of litter and an intermediate vegetation height favouring high densities of grasshopper species in general and threatened species in *** is especially true for the two most productive vegetation types,grasslands on mineral soil and *** promote biodiversity in general and grasshopper densities in particular,we recommend maintaining traditional cattle grazing(stocking capacities:0.5-2.0 livestock units/ha)in common *** possible,this grazing regime should also be introduced in the surrounding landscape.

关键词： biodiversity conservation common pasture habitat heterogeneity insect abundance land-usechange mire ecosystem

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