Download presentation
Presentation is loading. Please wait.
Published byΠάτροκλος Κούνδουρος Modified over 6 years ago
1
POGIL GROUPS – 1st BLOCK Group 1 Destinee Angel Jose Group 2 Brooklyn
Tommy Celeste Group 3 Princess Christian Chayra Group 4 Damien Jordan Group 5 Antoinette Jackson Miahra
2
POGIL GROUPS – 3RD BLOCK Group 1 Lucy Luke Jacob Scotlyn Group 2 Aisha
John P. Heba Clayton Group 3 Carl Ellie G. Isabella Hau Group 4 Sarah Jake Matthew Mena Group 5 Adam Lily Ursula Chris Lyric Group 6 Elle B. Zoe Garland John O Anthony Group 7 Justin Jeremy Tori Dani Group 8 Beau Samantha Ryan Cameron Emmie C.
3
POGIL GROUPS – 4th BLOCK Group 1 Colin Henry Grace Caroline P. Group 2
Gavin Miles Ryan Tyler Group 3 Allen Kenneth Caroline R. Emma G. Group 4 Zae Peter Jordan Emma N. Group 5 Josh Evan Paola Lily Emma M. Group 6 Adam Alex Maddie Haley Chris
6
Biology Handbook p. 200 Get a chrome book and go to the class website.
Lindsaymathisbiology.weebly.com Go to Standard Biology Click on Ecology Tab Click on 33.Populations and fill in your HB notes starting on p. 200 Answer all box questions and CYQ questions!
7
How do communities change over time?
p. 200 Population Growth How do communities change over time?
8
How do living things interact in a community?
A. Competition - a struggle for resources among organisms. Ex. Nesting space for birds
9
Fill It In … Picture of competition:
10
How do living things interact in a community?
B. Predation Predators are organisms that consume other organisms Ex. Zebra eating grass Prey are organisms that are being consumed. Ex. Earthworm being eaten by a bird
11
How do living things interact in a community?
C. Symbiosis - two organisms of different species living together in a close, permanent relationship; 3 types
12
3 types of symbiosis: Mutualism - two organisms benefit each other (+,+) Ex. Termite and protozoan Ex. Lichen - an alga and a fungus
13
3 types of symbiosis: 2. Parasitism - one organism benefits and the other is harmed (+,-) Ex. Tapeworm and human Ex. Mistletoe and tree
14
3 types of symbiosis: Commensalism - one organism benefits and the other is unaffected (+,0) Ex. Clownfish and sea anemone Ex. Whale and barnacles Symbiosis Video
15
Fill It In … Fill in the correct type of symbiosis for the following symbols: +,+ __________________ +,- ___________________ +, 0 _____________________
16
Check Yourself! Which biotic relationship is defined as a “struggle for resources”? In your backyard, you observe a snake entering your birdfeeder. Who is the predator and who is the prey? What is symbiosis?
17
Also called EXPONENTIAL GROWTH
Population growth Populations will grow until they reach their biotic potential, unless they are limited by factors in the environment This type of growth is known as a J-curve Also called EXPONENTIAL GROWTH
18
Exponential Growth Occurs when the individuals in a population reproduce at a constant rate Under ideal conditions with unlimited resources
19
Fill It In … Define “exponential growth”:
20
Also called LOGISTIC GROWTH
Population growth 2. Limiting factors, such as availability of food, water, and space establish a carrying capacity for populations This type of growth is known as a S-curve. Also called LOGISTIC GROWTH
21
Logistic Growth Occurs when a population’s growth slows or stops following a period of exponential growth As resources become less available, the growth of a population slows or stops
22
Fill It In … List limiting factors for a population of dandelions:
23
Population growth 3. Carrying capacity is defined as the number of individuals an environment can support.
24
Population growth Limiting factors in the environment help to maintain ecosystem stability by allowing populations to fluctuate around the carrying capacity. This is called dynamic equilibrium.
25
What is the CARRYING CAPACITY of the deer on WallaWalla Island?
26
Population growth Density dependent factors have a greater effect on a population when there is a higher population density (the number of individuals in a given space). (larger population sizes) For example, competition, predation, and the spread of infectious diseases are density-dependent factors.
27
Population growth Density independent factors influence the size of a population regardless of its density. For example, natural disasters such as forest fires are density independent factors. Others would include human influences like war, urban sprawling, and deforestation.
28
Turn to a partner and discuss…
29
Population growth Succession is the idea that communities will replace other communities in a predictable, orderly way; this happens because every community alters the physical factors of the environment. Ex. As trees grow, they produce shade.
30
Check Yourself! What kind of curve illustrates exponential growth?
What determines the carrying capacity of the environment? List 3 examples of limiting factors.
31
Practice! Complete the practice worksheet (both sides).
We will go over the answers.
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.