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1.
Izv Akad Nauk Ser Biol ; (3): 357-67, 2013.
Article in Russian | MEDLINE | ID: mdl-24171317

ABSTRACT

The notion of a dynamic compensatory system is discussed, characterized by the alternation of species occupying the leading position in bumblebee taxocenoses, 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.


Subject(s)
Ecosystem , Hymenoptera/physiology , Population Density , Animals , Bees/physiology , Environment , Islands
2.
Izv Akad Nauk Ser Biol ; (1): 88-98, 2013.
Article in Russian | MEDLINE | ID: mdl-23662466

ABSTRACT

The concept that the mechanisms limiting immigration of new Lepidoptera species are analogous for islands with different ages and degrees of endemism of their biotas is discussed. Specific features of individual species play a key role in establishment of the fauna and population on small islands rather than competitive interactions between these species. It is most likely that the species stably coexisting on an island will display similar ecological characteristics and life cycles, which complies with the concepts of the neutral theory of biodiversity and biogeography.


Subject(s)
Aquatic Organisms , Biological Evolution , Biota , Lepidoptera , Animals , Aquatic Organisms/genetics , Aquatic Organisms/physiology , Biodiversity , Ecology , Genetic Drift , Geography , Islands , Lepidoptera/genetics , Lepidoptera/physiology , Life Cycle Stages/genetics , Life Cycle Stages/physiology , Species Specificity
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