Abstracts » Environmental issues

Regulation, cycles and stability in northern carnivore-herbivore systems: back to first principles

Article Abstract:

Research indicates that a predation limitation norm exists among ungulate and predator systems in which the predator population is not controlled by human intervention. Data were obtained from wolf-moose populations in temperate-zone to low-arctic habitats.

Sweden, Statistical Data Included, Models, Human beings, Human-environment interactions, Predation (Biology), Animal life cycles, Animal populations, Predation

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Predators indirectly protect tundra plants by reducing herbivore abundance

Article Abstract:

Vole densities, plant damage and plant cover were examined in areas with or without small mammal predators to examine the potential of trophic cascades in a shrubby tundra ecosystem. Three out of five dwarf shrub species was substantially reduced on predator-free islands, providing evidence for strong cascading effects in a rather large-scale terrestrial system.

Administration of Conservation Programs, Endangered Species, Predatory animals, Tundra ecology

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The impact of short-term predator removal on vole dynamics in an artic-alpine landscape

Article Abstract:

Dynamics in five reference areas with similar habitat conditions were compared with vole dynamics in the short-term enclosure. The results show that predation plays a pivotal role for the regulation of herbivorous mammals in relatively productive arctic-alpine habitats.

Predator control, Alpine flora, Alpine plants

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