+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Intensity of intra- and interspecific competition in coexisting shortgrass species

Intensity of intra- and interspecific competition in coexisting shortgrass species

Journal of ecology 89(1): 40-47

1. Bouteloua gracilis and Buchloe dactyloides are dominant species in the shortgrass steppe. Previous studies have suggested that these species have similar resource requirements and, as there is no temporal segregation in growth, we suggest that competition for below-ground resources should be intense. Classical competition theory predicts that, under stable conditions, coexistence of species with similar requirements can occur if intraspecific competition is more intense than interspecific competition. We therefore compared the competitive abilities of the two species under both inter- and intraspecific conditions, another determinant of coexistence in plant communities. 2. A 3-year experiment was conducted in a small homogeneous area and a separate 2-year experiment was conducted in a larger area. In both experiments, a hexagonal planting design was used to achieve all possible combinations of species and to control plant size and neighbourhood asymmetries at the start of the experiment. Half the target plants were grown within steel cylinders to reduce below-ground competition. 3. We found similar results in the two experiments. Plant biomass and seed production were always higher in plants growing with reduced competition, although seed production was quite variable. Relative competition intensity did not differ between intraspecific and interspecific competition. 4. Our results suggest that competition between these coexisting shortgrasses is intense, but do not support the prediction of a difference between intra- and interspecific competition. We discuss alternative explanations.

Please choose payment method:

(PDF emailed within 0-6 h: $19.90)

Accession: 003480734

Download citation: RISBibTeXText

DOI: 10.1046/j.1365-2745.2001.00523.x

Related references

Intensity of Intra- and Interspecific Competition in Coexisting Shortgrass Species. Journal of Ecology 89(1): 40-47, 2001

Intra- and interspecific competition among coexisting lotic snails. Oikos 96(2): 251-264, 2002

Intra- and Interspecific Competition among Coexisting Lotic Snails. Oikos 96(2): 251-264, 2002

Interference competition in postmetamorphic salamanders interspecific differences in aggression by coexisting species. Ecology (Washington D C) 71(1): 307-314, 1990

Resource partitioning and interspecific competition among coexisting species of guans and toucans in SE Brazil. Netherlands Journal of Zoology ember; 51(3): 285-297, 2001

Effect of nutrient level on competition intensity in the field for three coexisting grass species. Journal of Vegetation Science 2(4): 513-522, 1991

Intra- and interspecific competition among Bromus species and winter wheat. BRITISH CROP PROTECTION COUNCIL [Author] Brighton Crop Protection Conference: Weeds, Vols 1-3 3) 363-364, 1995

Two-Species Asymmetric Competition: Effects of Age Structure on Intra- and Interspecific Interactions. Journal of Animal Ecology 76(1): 83-93, 2007

ESSs with two types of players II (intra- and interspecific competition between haploid species). Mathematical Biosciences, 732: 183-196, 1985

Assessing intra- and interspecific competition in thickets of broadleaved tree species. Allgemeine Forst und Jagdzeitung 176(5): 85-94, 2005

Two-species asymmetric competition: effects of age structure on intra- and interspecific interactions. Journal of Animal Ecology 76(1): 83-93, 2006

Intra- and interspecific competition for space in estuarine bird species in a one-prey situation. Acta Congressus Internationalis Ornithologici, 2: 1045-1050, 1980

Intra and interspecific competition among invasive and native species during early stages of plant growth. Plant Ecology 212(4): 531-542, 2011

Experimental evidence for intra- and interspecific competition in two species of rock dwelling land snails. Journal of Animal Ecology, 591: 301-315, 1990

Social behaviour in the sibling species of the common vole in relation to intra and interspecific competition. Zoologijas Muzeja Raksti P. Stuckas Latvijas Valsts Universitate, 167-192, 1984