1.2 Ecosystems

Habitat vs. Ecosystem

OXYGEN  Plants and animals cannot survive without oxygen HOW IS IT REPLENISHED? PHOTOSYNTHESIS! (what else does this require?) What is the formula for photosynthesis? 6H2O + 6CO2 + E  6O2 + C6H12O6 6O2 + C6H12O6  6H2O + 6CO2 + E 6CO2 + E  6O2 + 6H2O + C6H12O6 6O2 + 6H2O + C6H12O6  6CO2 + E (you will be required to know this!!)

The cells of most living things contain between 50 and 90 percent water. Without water, no organism would survive Water also carries nutrients from one place to another in ecosystems

Nutrients such as nitrogen and phosphorus are chemicals that are required for plant and animal growth

Light is required for photosynthesis converts solar energy into chemical energy usable by plants

Soil provides nutrients for plants and supports many species of small organisms Soil anchors plants in one place and absorbs and holds water

Soil organisms maintain soil structure. A square metre of soil may contain as many as 1000 different species of invertebrates! Soil organisms maintain soil structure. earthworms dig tunnels through the soil allow water and nutrients to move more easily Some soil organisms, such as bacteria, break down pollutants,

Let’s watch a little video… https://www.youtube.com/watch?v=zSmL2F1t81Q Symbiosis Mutualism Commensalism Parasitism

Head louse Lives on the human scalp Louse feeds exclusively on human blood Humans lose blood and sometimes get infections A) Commensalism C) Parasitism B) Mutualism D) None of the above

Many sloths have algae growing in their fur Many sloths have algae growing in their fur. The algae live on the heat, humidity and food source provided in the sloth’s fur, and the sloth becomes camouflaged against tree trunks with the green tinge to their fur. A) Commensalism C) Parasitism B) Mutualism D) None of the above

Which of the following lists is correctly organized from largest to smallest in size? Ecosystem, biome, community, population, single species Biome, community, ecosystem , population, single species Biome, ecosystem, community, population, single species Biome, ecosystem, population, community, single species

A) Commensalism C) Parasitism B) Mutualism D) None of the above Barnacles hitch rides on whales to travel and reproduce in new areas The whale is not bothered by the barnacles, but they also don’t do anything helpful for the whale A) Commensalism C) Parasitism B) Mutualism D) None of the above

A) Commensalism C) Parasitism B) Mutualism D) None of the above The Cuckoo bird lays eggs amongst Reed Warbler eggs. The Warbler mother hatches and raises the young Cuckoo bird. A) Commensalism C) Parasitism B) Mutualism D) None of the above

A) Commensalism C) Parasitism B) Mutualism D) None of the above Bees gather nectar from flowers which they make into food, and in return the flowers get pollinated A) Commensalism C) Parasitism B) Mutualism D) None of the above

REMINDER… TEST NEXT WEEK!!!