ENVS 1126 Study Guide - Euphorbia Esula, Canada Goose, Bluegill
Document Summary
Topic: 4. 1: along the shoreline of a pond canadian geese, american toads, and grass frogs search for food while bluegill and bass prey on small fish in the shallow water. These species, living and feeding in this particular location, represent one: species, population, community, ecosystem. Topic: 4. 1: a population that is at equilibrium is, experiencing a slow rate of growth, staying at about the same size, slowly losing size because of increases in environmental resistance, has most likely just lost a key predator. In north america, a toxic weed called leafy spurge was accidentally introduced and has grown and spread rapidly, covering millions of acres in north central united states and south central. Leafy spurge is generally avoided by cattle and horses and may be toxic to them. Thus, rangeland where leafy spurge has spread has been damaged by the invasion of this plant.
