Lectures on species interactions and competition

More documents

Recommendations

Info

Using pattern to infer interactions Positive association: A nonrandom clumped distribution, such as in (a), denotes a positive association between species (e.g., mutualism, or parasitism). Negative association: If the species show negative association with each other, as in (b), this indicative of a negative spatial association (e.g., allelopathy). No association: Two species that show totally random dispersal patterns in relation to each other, generally have no interaction, whereas a nonrandom pattern is indicative of an interaction (positive or negative). • However, these patterns are not necessarily indicative of a relationship. For example, both species may be associated with some environmental factor, such as water availability, and may have no real interaction with each other.
Competition • Since plants require the same basic resources (carbon, water, nutrients) in roughly the same proportion, and they do this through the same basic mechanism (photosynthesis, root uptake), then it stands to reason that they ought to compete for access to these resources. • This has been a central focus of studies since the inception of plant ecology (e.g., de Candolle 1820, Clements 1929, Tilman 1982, Keddy 1989, Connell 1990).
Page 1 and 2: This weeks schedule Mon, Wed: <stro
Page 3 and 4: Introduction • Individuals and po
Page 5: Pairwise interactions • Competiti
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 and 48: Allelopathy: Salvia leucophylla-gra
Page 49 and 50: Other ways plants change their envi
Page 51 and 52: Summary • Major types of competit

Lectures on species interactions and competition

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?