Lesson 2 - Interactions within Ecosystems PDF

Unit 2 Ecology Lesson 2 Interactions within Ecosystems Objective Predictspatterns of interactions among organisms across multiple ecosystems Entry Card Open your book and answer the following: (5 mins - Individual) Entry Card Open your book and answer th...

Unit 2 Ecology Lesson 2 Interactions within Ecosystems Objective Predictspatterns of interactions among organisms across multiple ecosystems Entry Card Open your book and answer the following: (5 mins - Individual) Entry Card Open your book and answer the following: (5 mins - Individual) Entry Card What have you noticed? How do some organisms benefit in relationships? o Symbiosis Barbel fish and hippos have a unique relationship, the fish follow and groom the hippos to eat. o The hippos have parasites removed and their mouths cleaned by the fish. o Both rely on the interaction to stay healthy and survive. This relationship is a type of symbiosis. How do some organisms benefit in relationships? o Symbiosis is a close, long-term relationship between two species that usually involves an exchange of food or energy. o Symbiotic relationships occur when two organisms live in direct contact and form a relationship. o Some species have such close relationships that they are almost always found living together. What are the different types of symbiotic relationships? Commensalism A symbiotic relationship that benefits one species but does not harm or benefit the other. Plants called epiphytes grow on the trunks of trees and other objects. The plant's nutrients are absorbed from the air. Epiphytes benefit from attaching to tree trunks by getting more living space and sunlight. The trees are neither helped nor harmed by the plants. What are the different types of symbiotic relationships? Parasitism A symbiotic relationship that benefits one species and harms the other. The species that benefits is the parasite. The species that is harmed is the host. The larvae of the hunting wasp is a parasite. The female wasp stings a spider to paralyze it, then she lays eggs in its body. When the eggs hatch into larvae, they eat the paralyzed spider.  What are the different types of symbiotic relationships? Mutualism A symbiotic relationship in which both partners benefit. Clownfish and sea anemones live in tropical coral reef communities. The clownfish receives protection from the anemone as the anemone will sting predators of the clownfish. The anemone in turn receives energy from the waste produced by the clownfish. Open your book and answer the following: (5 mins - Individual) Open your book and answer the following: (5 mins - Individual) What other types of relationships exist in ecosystems? Cooperative Relationships Cooperative relationships can be found in many different populations across the world. 1- For example, elephants cooperate with each other to raise the young and watch for predators. 2- Squirrel monkeys benefit in a similar way by living in groups. They cooperate as they hunt for food and watch for danger. What other types of relationships exist in ecosystems? Predator-Prey Relationships A predator-prey relationship is one in which one organism, the predator, eats another, the prey. 1- The osprey catching a fish 2- Predators help prevent prey populations from growing too large for the carrying capacity of the ecosystem and keep the prey population healthy. What other types of relationships exist in ecosystems? Competitive Relationships Competition describes interactions between two or more organisms that need the same resource at the same time. 1- Trees compete for sunlight, and the shade from tall trees can slow the growth of younger trees. 2- Wolves compete with ravens for meat from the animals that wolves kill. Homework Homework