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Titel (primär) Functionally richer communities improve ecosystem functioning: Dung removal and secondary seed dispersal by dung beetles in the Western Palaearctic
Autor Milotić, T.; Baltzinger, C.; Eichberg, C.; Eycott, A.E.; Heurich, M.; Müller, J.; Noriega, J.A.; Menendez, R.; Stadler, J.; Ádám, R.; Bargmann, T.; Bilger, I.; Buse, J.; Calatayud, J.; Ciubuc, C.; Boros, G.; Jay-Robert, P.; Kruus, M.; Merivee, E.; Miessen, G.; Must, A.; Ardali, E.; Preda, E.; Rahimi, I.; Rohwedder, D.; Rose, R.; Slade, E.M.; Somay, L.; Tahmasebi, P.; Ziani, S.; Hoffmann, M.;
Journal / Serie Journal of Biogeography
Erscheinungsjahr 2019
Department BZF;
Band/Volume 46
Heft 1
Seite von 70
Seite bis 82
Sprache englisch;
Datenlinks https://www.gbif.org/dataset/bcbfd319-8813-4b6d-b529-07dc5a6ccf56
https://zenodo.org/record/1115523#.WjEpHlXiapo
Supplements https://onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1111%2Fjbi.13452&file=jbi13452-sup-0001-Supinfo.docx
Keywords ecosystem function; ecosystem service; latitudinal gradient; longitudinal gradient; multisite experiments; Scarabaeidae
Abstract

Aim

In several ecosystems, the diversity of functional species traits has been shown to have a stronger effect on ecosystem functioning than taxonomic diversity alone. However, few studies have explored this idea at a large geographical scale. In a multisite experiment, we unravelled the relationship between ecosystem function and functional completeness of species assemblages using dung beetles as a model group, focusing on dung removal and secondary seed dispersal.

Location

Seventeen grassland locations across the Western Palaearctic.

Methods

We used a randomized block design with different exclosure types to control the dung and seed removing activities of individual functional groups of the local dung beetle assemblage. We classified dung beetle species according to resource specialization and into functional groups based on dung processing behaviour (dwellers, tunnellers, rollers) and body size (small, large). Additionally, we assessed the role of other soil macro‐invertebrates. By sampling the dung beetle community and measuring the remaining dung and seeds after the experiment, the impact of each functional group was estimated.

Results

Dung beetle assemblages differed along a north–south and east–west gradient. Dwellers dominated northernmost sites, whereas at lower latitudes we observed more tunnellers and rollers indicating a functional shift. Resource specialists were more abundant in southern and eastern areas. Overall, functional group diversity enhanced dung removal. More dung (+46.9%) and seeds (+32.1%) were removed in the southern sites and tunnellers and rollers were more effective. At the northernmost sites, where tunnellers were scarce or absent, other soil macro‐invertebrates removed the majority of dung.

Main conclusions

The conservation of functionally complete dung beetle assemblages is crucial to maintain the ecosystem functions provided by dung beetles. Given the latitudinal variation in functional group diversity, it is reasonable to expect compositional changes due to climate change. These changes could lead to increased dung removal and a higher secondary seed dispersal rate in northern regions.

ID 20904
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=20904
Milotić, T., Baltzinger, C., Eichberg, C., Eycott, A.E., Heurich, M., Müller, J., Noriega, J.A., Menendez, R., Stadler, J., Ádám, R., Bargmann, T., Bilger, I., Buse, J., Calatayud, J., Ciubuc, C., Boros, G., Jay-Robert, P., Kruus, M., Merivee, E., Miessen, G., Must, A., Ardali, E., Preda, E., Rahimi, I., Rohwedder, D., Rose, R., Slade, E.M., Somay, L., Tahmasebi, P., Ziani, S., Hoffmann, M. (2019):
Functionally richer communities improve ecosystem functioning: Dung removal and secondary seed dispersal by dung beetles in the Western Palaearctic
J. Biogeogr. 46 (1), 70 - 82