BIOLOGY
10-22-15
9TH ENTRY TASK FOR CHAPTER 4
ET:
• WHAT WAS THE RESOURCE YOU FOUND
MOST HELPFUL WHEN STUDYING FOR
CHAPTER 4 TEST?
LO:
COLLECTING DETAILED FIELD OBSERVATIONS
HOW TO ESTIMATE PLANT POPULATION DENSITY
PLAN OF THE DAY
• CHECKING GRADES FOR CHAPTER 4 TEST
• FIELD OBSERVATIONS
• DESIGNING A METHOD TO ESTIMATE PLANT
POPULATION DENSITIES ON OUR BACK YARD
METHOD DESIGN PHASE
• WITH YOUR GROUP, GO TO THE SECOND PAGE IN YOUR PACKET
AND START WORKING ON THE ‘METHOD DESIGN’ PHASE
• WORK ON THE WHITEBOARDS FIRST AND THEN TRANSFER TO
YOUR PAPER (DO NOT ERASE YOUR WHITEBOARDS, YOU WILL
NEED THEM LATER!!!)
• THIS PHASE HAS TO BE COMPLETED IN 15 MINUTES!!
COMMUNICATING TO OTHER GROUP
• IN THIS PHASE, YOU ARE GOING TO PRESENT YOUR METHOD DESIGN TO
OTHER GROUP
• IF YOU ARE GROUP 2, GO TO TABLE 1, IF YOU ARE GROUP 4, GO TO
TABLE 3, IF YOU ARE GROUP 5, GO TO TABLE 6, IF YOU ARE GROUP 7,
GO TO TABLE 8
• THE SPOKESPERSON FROM EACH GROUP WILL EXPLAIN THEIR DESIGN TO
THE OTHER GROUP (USE THE WHITEBOARDS FOR THIS). THE GROUP WITH
THE SMALLER NUMBERS GO FIRST (FOR EXAMPLE, FOR GROUPS 1 AND 2,
1 GOES FIRST)
• YOU HAVE 8 MINUTES TO DO YOUR PRESENTATION!!
BIOLOGY
10-26-15
START A NEW PAGE FOR THE 1ST ENTRY TASK
FOR CHAPTER 5 (TEST DATE: MONDAY, NOVEMBER 2)
ET: COPY CHAPTER 5 MAP
LO:
HOW ARE POPULATIONS DISTRIBUTED?
PLAN OF THE DAY
• CHECKING GRADES FOR CHAPTER 4 TEST
• WORK ON POPULATION DISTRIBUTION
ACTIVITY (SECTION 5.1)
BIOLOGY
10-27-15
2ND ENTRY TASK FOR CHAPTER 5
ET:
WHAT IS THE POPULATION DENSITY OF DANDELIONS, IN
A 14 SQUARE KILOMETER PARK WITH A TOTAL OF 420
DANDELION PLANTS? SHOW YOUR WORK!
LO:
DIFFERENCE BETWEEN EXPONENTIAL AND
LOGISTIC GROWTH
DIFFERENCE BETWEEN DENSITY DEPENDENT AND
DENSITY INDEPENDENT LIMITING FACTORS
PLAN OF THE DAY
• CORRECT POPULATION DISTRIBUTION ACTIVITY
(SECTION 5.1)
• GO OVER LOGISTIC AND EXPONENTIAL
GROWTH
• GO OVER DENSITY DEPENDENT VS. DENSITY
INDEPENDENT FACTORS
LIMITS TO POPULATION GROWTH
EXPONENTIAL GROWTH OF POPULATIONS
A POPULATION’S ABILITY TO GROW
PARTLY DEPENDS ON THE RATE AT
WHICH ITS ORGANISMS CAN
REPRODUCE
EXPONENTIAL GROWTH IS WHEN THE
POPULATION MULTIPLIES AT A
CONSTANT FACTOR AT CONSTANT
TIME INTERVALS I.E. BACTERIA
DOUBLING EVERY 20 MINUTES
TRANSPARENCY 35A-2
TRANSPARENCY 35A-3
TRANSPARENCY 35A-4
TRANSPARENCY 35A-5
1. Compare and contrast the two growth curves.
Both curves show a period of rapid population growth, but the fur seal
population eventually levels off. The bacterial population appears to continue
growing exponentially.
TRANSPARENCY 35A-6
2. Which curve do you think more closely resembles the growth of most
populations in nature? Explain.
Limited growth curve; populations in nature are subject to limiting factors that
prevent long-term exponential growth.
CARRYING CAPACITY
A POPULATION MAY START TO GROW EXPONENTIALLY, BUT EVENTUALLY
ONE OR MORE ENVIRONMENTAL FACTORS WILL LIMIT ITS GROWTH
• A LIMITING FACTOR IS A CONDITION THAT CAN RESTRICT A
POPULATION’S GROWTH
• THE CARRYING CAPACITY IS THE NUMBER OF ORGANISMS IN A
POPULATION THAT THE ENVIRONMENT CAN MAINTAIN OR “CARRY”
FACTORS AFFECTING POPULATION GROWTH
A. DENSITY-DEPENDENT FACTORS IS A
FACTOR THAT LIMITS A POPULATION MORE
AS A POPULATION DENSITY INCREASES
B. DENSITY-INDEPENDENT FACTORS ARE
FACTORS THAT LIMIT POPULATION BUT ARE
UNRELATED TO POPULATION DENSITY
POPULATION GROWTH
TEMPERATURE AND HUMIDITY
FOOD AVAILABILITY
Density- Independent
Density-dependent
POPULATION CYCLING
A. A “BOOM” AND “BUST” GROWTH CYCLE
IS ONE THAT INCREASES RAPIDLY
FOLLOWED BY A SHARP DECLINE
B. OTHER GROWTH CYCLES ARE INFLUENCED
BY THOSE OF OTHER POPULATIONS IN
THEIR ENVIRONMENTS
POPULATION CYCLING
BIOLOGY
10-28-15
3RD ENTRY TASK FOR CHAPTER 5
ET:
WHAT IS THE DIFFERENCE BETWEEN DENSITY DEPENDENT
AND DENSITY INDEPENDENT FACTORS?
LO:
HOW POPULATION GROWTH IS NATURALLY
REGULATED
PLAN OF THE DAY
• CORRECT POPULATION DISTRIBUTION ACTIVITY
(SECTION 5.1)
• POPULATION GROWTH POGIL
POPULATION DISTRIBUTION QUIZ
BIOLOGY
10-29-15
4TH ENTRY TASK FOR CHAPTER 5
ET:
GET A BIO BOOK. EXAM THE CAPTION FOR THIS GRAPH ON
PAGE 139. EXPLAIN WHAT
HAPPENED TO THE
MOOSE POPULATION
AFTER 1995 AN WHY
LO:
HOW POPULATION GROWTH IS NATURALLY REGULATED
HOW HUMAN POPULATION GROW
PLAN OF THE DAY
• FINISH AND CHECK POPULATION GROWTH
POGIL ANSWERS
• HUMAN POPULATION GROWTH
WITH YOUR GROUP CHECK THESE GRAPHS. INFER ALL YOU
CAN FROM THE INFORMATION THESE GRAPHS ARE
PROVIDING (YOU CAN USE THE BOOK OR NOTES)
COUNTRY A POPULATION
COUNTRY B POPULATION
WORLD POPULATION
• HTTP://WWW.WORLDOMETERS.INFO/WORLD-POPULATION/
• HTTP://WWW.EAHDFOUNDATION.ORG/WORLD_LIVE_CLOCK.PHP
• HTTP://WWW.CENSUS.GOV/MAIN/WWW/POPCLOCK.HTML