Patterns and consequences of interspecific competition in natural communities: a review of field experiments with plants

Article Abstract:

Plant field experiments published between 1979 and 1988 in seven journals were studied to address questions about the patterns of interspecific competition over time and space, their effects on community structure, and competitive ability among species. Competition seemed to have strong effects on community structure as shown in its significant effects on distribution patterns, relative abundances and diversity. It was also seen that interspecific competition was usually stronger than intraspecific competition with respect to competitive effect and response.

Environmental aspects, Botany, Plant ecology, Competition (Biology), Resource partitioning (Ecology)

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Testing a metapopulation model of coexistence in the insect community on ragwort (Senecio jacobaea)

Article Abstract:

A study of metapopulation model of coexistence for the insect herbivores of ragwort shows that few ragwort colonized new patches and survived the patchy defoliation by cinnabar moth, thereby indicating that insects colonize experimental patches up to 380 meters from a source. The alteration in spatial distribution of ragwort patches and insects was determined over an area of 1.3 km square for three field seasons. The rate of colonization by ragwort were computed at various distances from a source patch.

Moths, Colonization

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Interspecific competition for tree holes: consequences for mating systems and coexistence in neotropical damselflies

Article Abstract:

The influence of larval interspecific competition for reproductive resources on mating strategy types is discussed. The territorial behaviors of the Megaloprepus coerulatus and Mecistogaster species are observed in experiments conducted on tree holes. The larvae of Mecistogaster species have poor competitive ability which negates the advantage derived by adult males from defending their territories. The adult males of Megaloprepus coerulatus produce superior offspring by defending larger territories.

Damselflies, Spatial behavior in animals, Animal spatial behavior, Insect larvae

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