Articles | Volume 15, issue 12
Research article
27 Jun 2018
Research article |  | 27 Jun 2018

Immediate increase in isotopic enrichment in small mammals following the expansion of a great cormorant colony

Linas Balčiauskas, Raminta Skipitytė, Marius Jasiulionis, Laima Balčiauskienė, and Vidmantas Remeikis

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Cited articles

Balčiauskas, L., Balčiauskienė, L., and Jasiulionis, M.: Mammals under the colony of great cormorants: population structure and body condition of the yellow-necked mice, Turk. J. Zool., 39, 941–948,, 2015. 
Balčiauskas, L., Skipitytė, R., Jasiulionis, M., Trakimas, G., Balčiauskienė, L., and Remeikis, V.: The impact of Great Cormorants on biogenic pollution of land ecosystems: Stable isotope signatures in small mammals, Sci. Total Environ., 565, 376–383,, 2016. 
Balčiauskienė, L., Jasiulionis, M., and Balčiauskas, L.: Loss of Diversity in a Small Mammal Community in a Habitat Influenced by a Colony of Great Cormorants, Acta Zool. Bulgar., 66, 229–234, 2014. 
Bauduin, S., Cassaing, J., Issam, M., and Martin, C.: Interactions between the short-tailed mouse (Mus spretus) and the wood mouse (Apodemus sylvaticus): diet overlap revealed by stable isotopes, Can. J. Zool., 91, 102–109,, 2013. 
Bobek, B.: Survival, turnover and production of small rodents in a beech forest, Acta Theriol., 14, 191–210,, 1969. 
Short summary
Effects of an expanding great cormorant colony on small mammals were evaluated. An increase of the number of bird pairs led to decreased δ13C and increased δ15N values in mice hair after the first year of nest appearance. Differences in isotopic signatures were related to species of rodents, pointing to the differences in their diet. Cormorant influence was indirect, the result of biological pollution from guano on rodent foods. Scaring cormorants from the colonies may have the opposite effect.
Final-revised paper