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Mechanism of density compensation in island bumblebee assemblages (Hymenoptera, Apidae, Bombus) and the notion of reserve compensatory species |
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| Authors: | I. N. Bolotov Yu. S. Kolosova M. V. Podbolotskaya G. S. Potapov I. V. Grishchenko |
| Affiliation: | 1. Institute of Ecological Problems of the North, Ural Branch, Russian Academy of Sciences, nab. Severnoi Dviny 23, Arkhangelsk, 163000, Russia 2. Lomonosov Northern (Arctic) Federal University, nab. Severnoi Dviny 17, Arkhangelsk, 163000, Russia 3. Northern Department for Hydrometeorology and Environmental Pollution Monitoring, ul. Mayakovskogo 2, Arkhangelsk, 163020, Russia |
| Abstract: | The notion of a dynamic compensatory system is discussed, characterized by the alternation of species occupying the leading position in bumblebee assemblages, while the total density of these pollinators in island ecosystems remains at similar levels. The functioning of the compensatory system is regulated by both abiotic factors (the weather and climate) and biotic factors (competition for trophic resources). The stability of the system is determined by the presence of reserve compensatory species capable of rapid population growth against the background of depressed abundance of other species under changing environmental conditions. |
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