On the indices of plant-plant competition and their pitfalls

Article Abstract:

The performance of four indices are compared using both imagined and real data, the latter from systems where the responses of plants to neighbor removal ranged from weak to moderate, so that relative neighbor effect (RNE) and corrected index of relative competition intensity (CRCI) were found to behave similarly. The indices were compared both from pooled data for each community and as averages of pair-wise comparisons.

Environmental aspects, Habitat selection, Alpine flora, Alpine plants

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Regional effects on competition-productivity relationship: A set of field experiments in two distant regions

Article Abstract:

The effect of productivity on competition intensity and the relationship between competition intensity and community species richness is studied using a removal experiment with the perennial plant Solidago virgaurea. The relationship between competition intensity and productivity is strongly dependent on regional differences and is intimately connected to a concordant variation in the intensity of grazing.

Food and nutrition, Grazing, Goldenrods

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Importance of large and small mammalian herbivores for the plant community structure in the forest tundra ecotone

Article Abstract:

The importance of large and small mammalian herbivores for the plant community structure in the forest tundra ecotone is discussed. The influence of herbivores on vegetation patterns in tundra communities is highlighted indicating that intense and localized selective foraging by small mammals may have a more marked effect on vegetation than transient feeding by reindeer.

Influence, Plant ecology, Plant communities, Plant-animal interactions

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