48. Example: deer, rabbits, mouse & cricket eat the plants for energy…
49. other animals ( ) ….
50. Ex: the mountain lion, snake, hawk, owl, frog(secondary consumers) eat the deer, rabbit, mouse, cricket for energy….
51. . Yaaay! decomposers!Yaaay! us!
52. are very important, they .
54. Remember: the decomposers are ALWAYS in a healthy ecosystem, EVEN THOUGH YOU CAN’T SEE THEM!.
55. this has all the requirements of astable ecosystem. What are they?
56. Now answer 1-11
57. There is a limited (finite) amount of resources in any ecosystem… Limited amounts of food, limited amounts of water, limited amounts of minerals…..
58. Every ecosystem has a limited amount of food…
59. Every ecosystem has a limited amount of water…..
60. Limiting factors LIMIT the size of a population.
61. Moisture is often a limiting factor forplants. Ex: here, each tree thrives in a different amount of moisture.
62. Examples: on the size of each other’s populations.
63. An increase in the zebra population = an increase in the lion population
64. Conversely, a decrease in the zebrapopulation = a decrease in the lion population
65. Also an increase in the lions= a decrease inzebras which would cause a decrease in the lions too!
66. very effective Diseases have always been an effective limiting factor on human populations
67. The Bubonic plague killed over half of Europe’s population. The fictional “Crippen Virus” in “I amLegend” was over 90% fatal to the human population. Diseases have always been an effective limiting factor on human populations
68. Look at the next sevenslides…what are the organisms doing?
69. Mine! No! Ours!
70. Ours! TRY to take it!
71. Mine! Mine!Mine! mine! No! no! No! No! No!
72. hey Frank, Hey Frank,save me a Don’t you piece! mean “ours”? MINE! MINE!
73. The cheese is minebecause Mr. “left hook” says so!
74. THAT can beYou want MY arranged!bread? Over my dead body!
75. LET GO, before I start throwing NEVER! them LEFT HOOKS!
76. The resources, that organisms need to live, are finite (limited)…
77. Finite resources lead to competition
79. Why WON’T these insects compete, even though they are on the SAME plant?
80. Why DON’T the Cape May Warblerscompete with the other two kinds of warblers for food & shelter?
81. Do you agree that the number ofpassengers has exceeded this bus’ carrying capacity?
82. An area can only support a limited numberof organisms. The maximum number is the area’s carrying capacity
83. Example: if an area has more food and more water, few predators, there will be more zebras (larger carrying capacity)
84. The predators and diseases also determine an area’s carrying capacity. More predators and more diseases = lower carrying capacity.
85. Less food or water, more predators (ordiseases) in an area = less zebras (low carrying capacity) Didn’t work! This’ll fool them stupid lions!
86. This is a typical carrying capacity graph:
87. If there is enough resources, a population will grow and grow and grow exponentially!
88. Eventually, if too many individuals areborn, the population will overshoot the carrying capacity….
89. Individuals will die from competition, disease, stress, predators until thepopulation in below carrying capacity.
90. All population fluctuate up and downaround their territories carrying capacity. (this called equilibrium)
91. What is the carrying capacity for this population?
92. 1.5 million
93. Remember the following typical carrying capacity graphs.
95. What is the carrying capacity for the deer population?
96. Now answer 12- 32
98. All organisms have a habitat (a home) and a niche( a role/job) What is Santa’s habitat? What is Santa’s niche?
100. /its job/ .
101. These birds share a tree but havedifferent habitats and different niches
102. Why DON’T the Cape May Warblerscompete with the other two for food & shelter?
103. Now answer 33-40
104. How organismsget their food:
105. organisms get their food in one of three ways:producers consumers decomposers
106. s (also called )
107. ( )
108. are animals that I think I put on weight, is grass fattening?
109. are animals that Gee! That carcass looks good enough to eat!
110. decompose ( )
111. perform a vital role byrecycling ( ing)
112. Certain Bacteria, fungi & mushrooms are decomposers.
113. Now answer 41-61
115. Food chain or food web?
116. Food chain or food web?
117. Food chain or food web?
118. Food chain or food web?
119. Food chain or food web?
120. What is a food chain? What is a food web
121. Question: there are 4 organism in this ecosystem. who eats whom?