Survey
* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project
Download Competition - Groton School
Document related concepts
no text concepts found
Transcript
Interspecific Competition • Superior and inferior competitor • Rates of reproduction • Rates of growth • Tolerance to limiting factors • Direct competition Mechanisms for superior competition • • • • Consumption Preemption Overgrowth Chemical interactions (allelopathy) • Territoriality • Encounter competition Competitive Exclusion Eastern cottontail New England cottontail Coexistence of Groton rodents How can six species of salamander coexist on Groton School lands? Coexistence Resource Partitioning Resource-based models Spatially based models Temporal Models Changes over time (long-term) Low levels of competition allow for extended persistence Limiting Factor Models Predation Disease Parasitism Competition and Niche • Fundamental Niche • Realized Niche • Resource Partitioning – Spatial – Resource Selection – Timing? Spatial heterogeneity and variation • • • • Environmental Gradients Disturbance Soil/bedrock Aspect/topography Temporal Variation • Parameters that vary predictably over time – Temperature – Moisture – Seed and nut production – Prey population cycles • Response of the inferior competitor – Dispersal – Dormancy – Reduction in density Predation and Herbivory Competition and Evolution • Short-term changes – Behavioral • Long-term changes – Structural • Character Displacement • Behavioral plasticity How do so many New England carnivores persist in a small area? Full Circle • Why are the invasive species so successful in this system? • How do so many New England carnivores persist in a small area? • How can six species of salamander coexist on Groton School lands? Competition and Conservation Small Whorled Pogonia Isotria medeoloides
Related documents