Population Dynamics 2: Factors That Regulate Natural Populations.

Slides:

Advertisements

Similar presentations

Chapter 35 - Populations. Populations Can change over time Must determine the limits of an area Population Density - Ex - _________________________, or.

Advertisements

Defense Mechanisms  Most organisms have adaptations that help protect them against their predators  Cacti have thorns  Porcupines have quills  Monarch.

14.2 Community Interactions OBJECTIVES Students will learn that competition and predation are two important ways that organisms interact AND that symbiosis.

Population Growth and Interaction. Biotic Potential Highest possible per capita growth rate for a population. Factors which contribute to biotic potential.

Relationships Among Organisms Biology EOCT Review.

Organism Interactions. How do organisms interact in an ecosystem? A community is… All the biotic factors within an ecosystem. How do the different populations.

Populations Section #2: How Species Interact With Each Other.

Ecology Test Review. What is a model of feeding relationships in an ecosystem called?

Populations Chapter 8. Population Definition – all the members of a species living in the same place at the same time. Species – What? Place – Where?

UNIT VOCABULARY & NOTES Stability and Change. Ecological succession (succession) Process in which communities of plant and animal species in a particular.

MOVIN’ OUT By Immigration and Emigration

5-2 Limits to Growth. Limiting Factors The primary productivity of an ecosystem can be reduced when there is an insufficient supply of a particular nutrient.

Ecology One. Biosphere Biome Ecosystem Population Community Organism.

Population – group of individuals of the same species living in the same area, potentially interacting Community – group of populations of different species.

Ecological Interactions

How Do We Relate?. Relationships Many organisms have developed a close relationship with other organisms of different species. These close relationships.

Ch.21 Populations & Communities Section 3: Interactions Among Living Things.

 All living things interact with their environment, both biotic and abiotic  Most living things produce more offspring than can survive.

Interactions Within Ecosystems

Ecology Vocabulary Review Get out vocab sheet. Ecology: The study of how living things interact with nature.

POPULATIONS & COMMUNITIES REVIEW. The nonliving things within the environment. ABIOTIC FACTORS.

Understanding Populations

REVIEW CH 19 AND 20.  1. List the types of dispersion of population as pictured above.   a. RANDOM  b. UNIFORM  c. CLUMPED  2. Which type of dispersion.

Interactions within Communities. A community consists of all populations of different species that interact together in a given ecosystem. Some organisms.

Interactions within Communities SBI4U. Ecological Niches Community All populations in a given ecosystem at a specific time Types of niches Ecological.

Biological Niche An organism’s Niche describes the full biotic and abiotic conditions in which an organism lives – Biotic factors: Predators Prey competition.

REVIEW: WHAT ARE THE 5 EVIDENCES OF A CHEMICAL REACTION  What are the 5 evidences of a chemical reaction?

1 Study of interactions of living organisms with one another and with their physical environment.

Ecology Terms Review. A carnivore that feeds on the bodies of dead organisms.

Chapter 14 Interactions in Ecosystems. Section 14.1 Habitat and Niche.

Ecosystem Interactions Interactions The organisms in a community are capable of interacting with each other in some very complex ways. – They can: Hurt.

Population Interactions. It is sometimes useful to think of the universe as being organized into hierarchical levels, from the universe on top to the.

Relationships among Populations. Before watching the video, take time to read over all the questions in the activity page Before watching the video, take.

Populations Science Bennett. Can any population of organisms keep growing forever? Changes in a population in one part of a food web affects populations.

Topic: Ecology Learning Goal: I can describe relationships (producer/consumer, predator/prey, and parasite/host) as they occur in food webs. Essential.

Interactions Among Living Things. Adapting to the Environment Every organism has a variety of adaptations that are suited to its specific living conditions.

Population. 1.What are the characteristics of population? 2. population density – number of organisms per unit area 2. dispersion – the pattern of spacing.

The Web of Life: Interactions among living organisms Populations Interactions in Communities.

Community Interactions Community: Many different species interacting in the same environment. Three types of interactions: – Competition – Predation.

Living Together: Community Interactions. Symbiosis “Sym—biosis” = “Together—Living” Definition: Symbiosis is a close ecological relationship between the.

Environmental Science Chapter 8 1.  Section

1.3 I NTERACTIONS IN E COSYSTEMS pp L EARNING G OALS By the end of this lesson, you should: Understand the three different symbiotic relationships.

Symbiosis Mutualism | Commensalism | Parasitism Learning Objectives

Chapter 8. What is a population? The given number of a given species in a given area at a given time.

Population Dynamics. Every organism has a habitat and a niche.

14.1: Habitat & Niche  Key concept: Every organism has a habitat and a niche.

Community Interactions Community: Many different species interacting in the same environment. Three types of interactions: – Competition – Predation.

14.1: Habitat & Niche  Key concept: Every organism has a habitat and a niche.

Chapter 14: Interactions in the Ecosystem

Habitat and Niche and Community Interactions

Symbiosis – pg 101.

Populations and Interactions

Factors Affecting Populations

POPULATIONS & COMMUNITIES REVIEW

Ecosystem Interactions

Ecological Relationships

Chapter 5.2 – Limits to Growth

Population Ecology Part Two: Population Growth

Interactions in Ecosystems

Learning Objectives Identify the interactions that occur within communities.

Community Interactions

Community Interactions

Interactions among Organisms

Population and Community Dynamics

Ecology Chapters 2-5.

Ecology - Populations.

Ecosystem Interactions

Chapter 16 Section 3 Types of Interactions.

Symbiosis Relationships

Presentation transcript:

Population Dynamics 2: Factors That Regulate Natural Populations

Factors: Density independent factors: an abiotic event that affects population growth in the same way, regardless of population density. EG: floods, weather, droughts, forest fires, hurricanes, tornadoes. Density dependent factors: are biotic interactions that vary in affect on population growth depending on the populations involved. If the population is well below the carrying capacity, density dependent factors won’t have a big affect.

Density-Dependent Factors: Competition: Intraspecific: members of own species compete for resources Interspecific: two or more populations compete for limited resources. Causes evolutionary change. Producer-Consumer and Predator-Prey Interactions: if there are limited predators, then the prey numbers go up, creating a sinusoidal growth pattern. Defence Mechanisms: Protective colouring: camouflage, mimicry, etc.

Symbiotic Relationships Symbiosis: an ecological relationship between two species living in direct contact. Parasitism: when a symbiont lives off and harms the host. EG viruses, some worms, insects, fungus. Ectoparasites live outside the host (mistletoe grows on other trees and feeds off their sap) Endoparasites live inside their host Mutualism: when both species benefit from the relationship EG lichens Commensalism: one partner benefits, the other does not, but is not harmed either.

Practice: Page 533 #1, 5, 7, 14, 16,