Can Reintroduction of Beavers Improve Insect Biodiversity?

32 Pages Posted: 7 Nov 2022

See all articles by Line Holm Andersen

Line Holm Andersen

affiliation not provided to SSRN

Christian Ransborg

affiliation not provided to SSRN

Cino Pertoldi

affiliation not provided to SSRN

Sussie Pagh

affiliation not provided to SSRN

Simon Bahrndorff

Aalborg University

Abstract

Ecosystem engineering species, such as beavers, may help the restoration of biodiversity. Through the building of dams and lodges and altering the natural hydrology, beavers change the habitat structure and create multiple habitats that facilitate a wide variety of other organisms including terrestrial invertebrate communities. Here we study the effect of beaver reintroduction in Klosterheden in Denmark on biomass of flying invertebrates and diversity of moths. Further, aerial photos were used to assess riparian structure and productivity using the normalized difference vegetation index (NDVI). Our findings show that the presence of beavers affected flying invertebrate biomass, but that this was dependent on time of the year. Further, a strong effect of presence of beavers was found on diversity of moths. The results also show an increase in vegetation productivity and structural heterogeneity at sites with presence of beavers. Overall, our results demonstrate the importance of beavers as important ecosystem engineers that affect invertebrate species composition and abundance, as well as riparian structure and productivity.

Keywords: Rewilding, moths, Biomass, wetlands

Suggested Citation

Andersen, Line Holm and Ransborg, Christian and Pertoldi, Cino and Pagh, Sussie and Bahrndorff, Simon, Can Reintroduction of Beavers Improve Insect Biodiversity?. Available at SSRN: https://ssrn.com/abstract=4270759 or http://dx.doi.org/10.2139/ssrn.4270759

Line Holm Andersen (Contact Author)

affiliation not provided to SSRN ( email )

No Address Available

Christian Ransborg

affiliation not provided to SSRN ( email )

No Address Available

Cino Pertoldi

affiliation not provided to SSRN ( email )

No Address Available

Sussie Pagh

affiliation not provided to SSRN ( email )

No Address Available

Simon Bahrndorff

Aalborg University ( email )

Fredrik Bajers Vej 7E
Aalborg, DK-9220
Denmark

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