Functional Response Lab 10 Turn in proposals on front table.

Slides:



Advertisements
Similar presentations
Population Dynamics The change in the size, density, dispersion, and age distribution of a population in response to changes in environmental conditions.
Advertisements

Energy/Nutrient Relations (Ch. 7). Lecture Outline 1) Major methods of gaining energy 2) Limitations on energy gain –Plants –Animals.
Announcements. Foraging and prey selection Optimal Foraging theory: Individuals will maximize benefit:cost Model predictions only as good as the parameters.
Modelling Aquatic Rates In Natural Ecosystems BIOL471
Exploitation.
CHAPTER 52 POPULATION ECOLOGY Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Section A: Characteristics of Populations 1.Two.
Chapter 52 Population Ecology.
Predator-Prey Interaction in Structured Models Glenn Ledder J. David Logan University of Nebraska-Lincoln
Predation (Chapter 18) Predator-prey cycles Models of predation
Predation Competition (intra- and inter-) involve interactions between same trophic level Predation involves interactions between trophic levels One species.
Predation – Chapter 13. Types of Predators Herbivores – animals that prey on green plants or their seed and fruits. –Plants are usually damaged but not.
PREDATION One of the least well developed areas of ecological theory Management problems occur with a lack of information –Biological data on predators.
Uroplatus Gecko This has nothing to do with today’s lecture but speaking of cryptic critters…
The Great Bean Hunt Lab Activity
Population Interactions Competition for Resources: –Exploitative competition: Both organisms competing for the same resource(s). –Interference competition.
Objectives - Chapter What is an exploitative interaction?
Chapter 15 Predation. I. Terminology Predation = one organism is food for another Carnivory = feeding on animal tissue Parasitoidism = killing of host.
8.3 – Population Dynamics LT: Examine how one species population size can affect the carrying capacity of a different species Predict: Below is a population.
Many decades, huge area – spatially and temporally extensive cycling.
Two Species System n y ’ = rn y - an y n d –r = independent prey population increase rate –a = effect of predator on prey population n d ’ = bn y n d -
Natural Selection & Predator-Prey Interaction April 10, 2003 Steven J. Ehrlich.
Predation – what is it? One animal kills another for food ( + - interaction ) One animal kills another for food ( + - interaction ) Parasitism / Parasitoidism.
DO NOW: Today we are studying how a predator population and a prey population affect each other. Read Analysis Questions #3 and 4 and write your hypothesis.
Population Biology Chapter 4.
Population Biology AP Biology Image taken without permission fron newsletter/2003/april03/SLElephantbyWater.jpg.
AP Biology Population Ecology population ecosystem community biosphere organism.
Life Science 7 Mrs. Duddles Q1 -Ecosystems. Friday 10/24 Objectives: O Students will be able to predict the effects of different interactions in communities.
POPULATION ECOLOGY Tabitha Walton and Heath Edwards.
Population – group of individuals of the same species living in the same area, potentially interacting Community – group of populations of different species.
Predator vs. Prey prey impacts predator population more hunters kill 500,000 deer/year predators switch prey instead of starve Act. 1 – lynx and hare Act.
Population Biology Unit 2 Chapter 4. Population: group of same species living in a specific area This is a population of bacteria that can be studied.
Optimal Foraging Behavior  Species should forage in an efficient manner that maximizes benefits and minimizes costs  Varies with species and environmental.
Population Biology AP Biology Image taken without permission fron newsletter/2003/april03/SLElephantbyWater.jpg.
OUR Ecological Footprint 1. 2.
Demography Factors that affect growth & decline of populations
Carrying capacity. REVIEW Organism Population Community Ecosystem.
Why Study Diets??. The Life of a Diet Sample Background to foraging Why is it important to analyze diets? Collecting diet samples Identifying diet components.
Ecology 8310 Population (and Community) Ecology Patch selection (e.g., Marginal Value Theorem) Prey selection (optimal diet theory) Moving beyond feeding.
HAPPY WEDNESDAY Turn in Homework (Cosmos Video Worksheet) Give me back your Project Handout. Bellwork: Quickwrite – Use the following in a 42 word quickwrite.
Measuring and Modeling Population Change SBI4U. Demography The statistical study of the processes that change the size and density of a population through.
Background to Foraging. C.S. Buzz Holling aka "the man" Functional response was developed based on a 1959 paper These eating These.
Evaluating the effectiveness and efficiency of three common methods for studying the diet of raptor nestlings on two Accipiter species. Kuang-ying Huang,
Please pass back the new objective sheet. Please get out your signed permission slip and $15 for pick up. Take your “Tradeoffs- Sage Grouse and energy”
Population Ecology population ecosystem community biosphere organism.
Populations. What is a population? Group of organisms that belong to the same species and live in a particular place at a particular time.
MATH3104: Anthony J. Richardson.
Ecological footprints of some nations already exceed available ecological capacity. 1.
Population Structure and Dynamics
Populations Dynamics Chapter 36. I. Environmental Factors Living organisms are influenced by a wide range of environmental factors. These can be two.
Do Now Collect materials from the front of the room Turn in Symbiosis worksheet (if you didn’t do it yesterday) Take your seat Remember: QUIZ ON Friday.
LAB: Natural Selection Group Members: Problem Statement: What is the effect of environment on the survival of a population?
Through RELATIVE and ABSOLUTE dating, FOSSILS and ROCK LAYERS show us… That the earth’s habitats have changed over time….. That the earth’s climate has.
Community Level Effects
Optimal foraging theory and risk-sensitive foraging
Self-extinction due to adaptive change in foraging and anti-predator effort Matsuda H, Abrams PA (1994a) Runaway evolution to self-extinction under asymmetric.
1 Aim: How does competition affect organisms in nature? Do Now: List three things you compete for in your life.
Ecology: Lectures 14 & 15 Predation, Parts 1 & 2.
Life History Patterns. Development  At different stages of development, species require different resources  Also, they can be more at risk during different.
The Distribution of Species. How are organisms distributed in these biomes? Why are organisms found in some biomes but not others? The answer to these.
III. Symbiosis & Predator/Prey Interaction A. Symbiosis:A relationship where one species of organisms lives near, in, or on another organism. 1. Mutualism:
Populations Objective Discuss what a limiting factor for population growth is. Limiting factor Density-dependent limiting factor Density-independent limiting.
AN ECOSYSTEM IS A COMMUNITY (all organisms) PLUS ABIOTIC FACTORS POPULATIONS AND RESOURCES FLUCTUATE AT A PREDICTABLE RATE OVER TIME.
Biological structure of Fisheries Resources In Space And Time.
Population Ecology (Ch. 52) population ecosystem community biosphere organism.
Populations Introduction to Population Dynamics.
Predator/Prey Relationships
Review Labs.
HOW POPULATIONS GROW Chapter 5-1.
Logistic Growth Growth of a population slows or stops as resources become less available S curve.
Population Ecology.
Presentation transcript:

Functional Response Lab 10 Turn in proposals on front table.

Today’s Objectives Understand functional response of a predator at varying prey densities Understand what contributes to the three different types of functional response curves

Optimal Foraging Theory Foraging is a trade-off between energy costs and gains Accounting for: –Search time –Handling time –Energy gained

Optimal Prey Size Handling time Very highmediumlow Energy Gained highmediumVery low

Predator/Prey Interactions Changes in # of predators in response to # of prey   Changes in predator’s rate of consumption based on prey density

Functional Response Curves A single predator’s consumption rate of prey In relation to the prey population There are 3 general classes of functional response ( I, II, III)

Type I Linear increase in consumption Little to no handling time

Type II Typical of predators that specialize on one or a few prey species

06_23.jpg

Type III Prey refugia Low density Learning –Search image –Where to find prey Prey Switching

Prey density effects on predator consumption rate >> Part 1: No handling time << You will be the predators. Black-eyed peas are the prey. See directions in handout/coursepack.

Prey density effects on predator consumption rate >> Part 2: Handling time << - You are the predators - Rocks are the prey - Handling time is affected by your capturing tools (chopsticks) 1) Make predictions (on handout) 2) Capture prey at each density. Time limit=30 sec 3) Record handling time by stopping timer when all prey have been captured (up to 30 sec)

Prey density effects on predator consumption rate >> Part 3: Refugia << You are the predators Glass beads are the prey Handling time is affected by your capturing tools (spoons) 1) Make predictions (on handout) 2) Capture prey at each density (move around room to each density). Time limit=30 sec

Announcements Read Lab 2: Estimating Populations pgs (different from what’s on syllabus)