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© Boardworks Ltd 20091 of 6
© Boardworks Ltd 20092 of 6 Predators and prey A predator is an animal that hunts and kills other animals for food. The animal that is eaten is the prey. The size of the two populations are very closely linked. Why do you think this is? For example, lynxes are a type of wild cat that hunt snowshoe hares in northern parts of North America.
© Boardworks Ltd 20093 of 6 Predator-prey populations
© Boardworks Ltd 20094 of 6 Prey population changes The hare population follows a cyclical pattern, where it rises and falls in a fairly regular cycle. Why is this? Individual hares must compete for food and mates, and must also avoid being killed by lynxes, their predators. The hare population changes due to both the vegetation growing season and changes in the lynx population.
© Boardworks Ltd 20095 of 6 Predator population changes The lynx population also follows a cyclical pattern very similar to the hare population. Why is this? The lynx is very dependent on hares for food, so as the hare population changes so does the lynx population. This is why the lynx population rises and falls slightly after the rise and fall of the hare population.
© Boardworks Ltd 20096 of 6 Predator-prey cycles
Boardworks GCSE Science: Biology Competition
© Boardworks Ltd of 33 Compete or Die B2d. © Boardworks Ltd of 33 What do organisms compete for?
KS4 Biology Competition.
Contents Competition What is competition? Competition between animals Predator–prey relationships Multiple-choice quiz Competition in plants.
Predator-Prey Cycles Control of Population Size. Charles Elton (on the right) Studied living organisms in relation to their natural environment, or ECOLOGY.
1. Predator Prey Relationships Be able to describe the relationship between predators and their prey. Be able to explain the shape of a predator – prey.
1. Predator Prey Relationships
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The Predator-Prey Relationship. Part 1: The Meaning & Predicting With your tablemates, discuss the information in part 1 Define the terms Complete the.
THE CANADIAN LYNX BY OMAR ELSEKELY.
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SCIENCE 4th Grade – Adaptations 4.6, 4.8, 4.9, 4.10, 4.11 North East Independent School District A Tradition of Excellence.
Food Chains and Ecosystems
AN ECOSYSTEM IS A COMMUNITY (all organisms) PLUS ABIOTIC FACTORS POPULATIONS AND RESOURCES FLUCTUATE AT A PREDICTABLE RATE OVER TIME.
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© Boardworks Ltd of 24 KS4 Biology Competition.
Bell Ringer Label each graph as either LOGISTIC GROWTH or EXPONENTIAL GROWTH. Label each graph as either LOGISTIC GROWTH or EXPONENTIAL GROWTH. A B.
Interactions among Living Things. Populations There is a limit to the number of organisms (population) that an ecosystem can support based on different.
Measuring Populations. Introduction If you had one male and one female elephant in the wild They would reproduce every so often and have a baby elephant.
Energy Flow and Pyramids of Numbers Science - Chapter 2.
1 of 9 © Boardworks 2011 Food Chains To enable the animations and activities in this presentation, Flash Player needs to be installed. This can be downloaded.
AIM: What are symbiotic relationships?
Ecology Ch 6 Ecosystem Balance. Ch 6 Intro Ecosystems are a combination of biotic and abiotic factors Each part works like a part in a machine All play.
Predation Species A hunts and is a predator of Species B –Predator – is the animal that hunts –Prey – is the animal that is hunted.
OH DEER A non-technological model for species survival and predator/prey interactions.
Chapter 2. Commensalism Host Mutualism Parasites Parasitism Symbiosis Predator Prey Predator and Prey.
Many decades, huge area – spatially and temporally extensive cycling.
WHAT IS A HABITAT?. WHERE AN ANIMAL LIVES WHAT IS A PREDATOR? WHAT IS PREY? A predator is an animal that lives by killing and eating other animals. Prey.
By 4C Candy Chan. P.1 Introduction P.2 What does lynx eat? P.3 Where does lynx live? P.4-5 Lynx ’ s pictures p.6 My impressions.
Predicting predator-prey populations. Desired results.
1 Aim: How does competition affect organisms in nature? Do Now: List three things you compete for in your life.
Population Biology Chapter 4.
Interactions How organisms affect one another and their environment.
An inadvertent opening ramble about networks. Predation is a straight-forward interspecies population interaction. One species uses another as a food.
Population Growth Chapter What you need to know! The differences between exponential and logistic models of population growth How density-dependent.
Populations Objective Discuss what a limiting factor for population growth is. Limiting factor Density-dependent limiting factor Density-independent limiting.
Habitat and Lifestyle Unit A: Topic 2. Interdependence Each species relies on many other species in its environment No species can survive by itself Example:
Interactions in Ecosystems
Coniferous Forest Mrs. McGilvery class Braulio Garcia Gomez
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STAGES OF POPULATION GROWTH. Population Growth can be… Exponential ORLimited (J curve)(S curve)
PREDATION One of the least well developed areas of ecological theory Management problems occur with a lack of information –Biological data on predators.
Unit B: Chapter 2 Vocabulary Living Things Depend on One Another.
Ch 4: Population Biology
Adaptation Any characteristic (structure or behavior) that helps a plant or animal survive.
Lynx & Hare Learning Objectives 1.Students will be able to calculate population density. 2.Students will be able to graph the size of a population over.
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