Lectures on species interactions and competition

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Allelopathy: Ceratiola ericoides (Williamson 1990) • Florida chamise. • Halos around individual plants. • Too small to harbor rodents or other herbivores.
Other ways plants change their environment: Effect of overstory and understory plants on soil properties (Tappeiner and Alm 1975) • Pines create very acidic soils that are toxic to many species of plants and soil organisms, including worms, and many bacteria. Fungi tend to dominate the microflora in these soils, whereas bacteria dominate the more neutral soils beneath deciduous forests. • The above table shows the difference in some key soil properties of pine and birch forests. The pine forest have lower pH, lower bulk density, lower soil nutrients, and slower litter and nutrient turnover times. • There is some variation due to understory species, but this effect is relatively minor. From Tappeiner and A.A. Alm. Undergrowth vegetation effects on the nutrient content of litterfall and soils in red pine and birch stands in northern Minnesota. Ecology 56: 1193-1200.
Page 1 and 2: This weeks schedule Mon, Wed: <stro
Page 3 and 4: Introduction • Individuals and po
Page 5 and 6: Pairwise interactions • Competiti
Page 7 and 8: Competition • Since plants requir
Page 9 and 10: Ways to study competition • Analy
Page 11 and 12: Gause s (1934) competitive exclusio
Page 13 and 14: Intraspecific (within species) comp
Page 15 and 16: Zero Net Growth Isocline diagrams (
Page 17 and 18: Situation where the isoclines cross
Page 19 and 20: Replacement series experiments (De
Page 21 and 22: Fisher et al. (2002) Experiments Ex
Page 23 and 24: Fischer et al. (2002) Results • U
Page 25 and 26: Replacement series (De Wit 1960) (a
Page 27 and 28: Competition experiments: Targetneig
Page 29 and 30: Competition experiments: Examinatio
Page 31 and 32: Competition for light and soil mois
Page 33 and 34: Nutrient flux gradients (Huston and
Page 35 and 36: Resource competition: Effect of com
Page 37 and 38: Tilman s resource-ratio model (1982
Page 39 and 40: Tilman s resource-ratio model (1982
Page 41 and 42: Implications of Resource-ratio hypo
Page 43 and 44: Reconciling the theories of Grime a
Page 45 and 46: Amensalism Interaction which depres
Page 47: Allelopathy: Salvia leucophylla-gra
Page 51 and 52: Summary • Major types of competit

Lectures on species interactions and competition

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