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Gewählte Master / Diploma Thesis:

Alexandra Pfingstmann (2018): Effect of tillage intensities on predator-prey interactions in vineyards from different landscapes: the case of spiders & springtails.
Master / Diploma Thesis - Institut für Zoologie, BOKU-Universität für Bodenkultur, pp 35. UB BOKU obvsg

Data Source: ZID Abstracts
Abstract:
Ecosystem services provided by vineyards result from interactions between management intensity, soil properties and organisms inhabiting this agroecosystem. However, there is very little known to what extent management or landscape factors influence the abundance and diversity of soil biota or predator-prey interactions in vineyards. In this study we examined (i) to what extent different soil tillage intensities of vineyard inter-rows affect the activity and diversity of spiders and springtails plus their interrelations and (ii) to what extent the surrounding landscape is altering these interactions. We collected data in inter-rows of 16 commercial vineyards in Austria, eight were periodically mechanically disturbed (PMD), eight had permanent green cover (PGC). All vineyards were embedded in a landscape ranging from structurally simple to complex. Spiders and collembola were collected with pitfall traps; vegetation surveys included plant species diversity, and vegetation cover. The landscape surrounding the study vineyards within a radius of 750m using orthophotos and additional field mapping in a geographical information system. Data were analysed with generalized mixed models selected using the Akaike Information Criterion. Results showed that soil tillage intensity interacted with the surrounding landscape and affected spiders and collembolan differently. While springtail diversity was unaffected by tillage, spider diversity was higher under PGC than under PMD. Overall activity densities of both were highest under PMD inter-rows. Spider activity density was increased in PMD inter-rows especially when the proportion of semi-natural landscape elements in the surroundings was low. Our results suggest that potentially detrimental influences of soil management appear to be compensated through interactions with the surrounding landscape. These investigations are part of the transdisciplinary BiodivERsA project VineDivers (www.vinedivers.eu).

Beurteilende(r): Zaller Johann

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