Limnology Limnology

What is Limnology?What is Limnology?

Think about –ology? Think about –ology? What does biology What does biology mean?mean?

Limnology is the Limnology is the study of fresh waters. study of fresh waters.

Today we will study a Today we will study a pond ecosystem.pond ecosystem.

What is an ecosystem?What is an ecosystem?

Ecosystem….what is the first thing you Ecosystem….what is the first thing you think of when you hear this word?think of when you hear this word?

AnimalsAnimals PlantsPlants WaterWater AirAir SoilSoil

Which of these Which of these are living?are living?

AnimalsAnimals PlantsPlants

WaterWater Dissolved Oxygen Dissolved Oxygen TemperatureTemperature

Which of these Which of these are nonliving?are nonliving?

We call these Biotic Factors.

We call these Abiotic factors.

What could we catch What could we catch today?today?

Invertebrates Invertebrates Larva/Nymph-early stages of some insects livesLarva/Nymph-early stages of some insects lives

Water Scorpion (Adult) Damselfly nymph Water Scavenger Beetle

What is pH?What is pH?

pH is the measure of how pH is the measure of how much acid is in a much acid is in a substance. substance.

It is measured with a It is measured with a scale that ranges from 0-scale that ranges from 0-14. 14.

Every substance with a Every substance with a pH less than 7 is an acid. pH less than 7 is an acid.

Every substance with a Every substance with a ph more than 7 is a base.ph more than 7 is a base.

A pH of 7 gives us a A pH of 7 gives us a neutral substance. neutral substance.

Fahrenheit vs. CelsiusFahrenheit vs. Celsius

We use Fahrenheit for as our standard unit for We use Fahrenheit for as our standard unit for temperature. What is freezing? Boiling?temperature. What is freezing? Boiling?

Scientists use Celsius. What is freezing? Scientists use Celsius. What is freezing? Boiling?Boiling?

Which do you think we will use today? Which do you think we will use today?

Let’s get ready to go to the Let’s get ready to go to the pond!pond!

Today we will be divided into groups. Today we will be divided into groups. Each group will have a certain job to do. Each group will have a certain job to do. Please stay in your group. Please stay in your group. Everyone will go to every station. Everyone will go to every station.

Group 1Group 1 Binoculars and Turbidity Binoculars and Turbidity

Your mission is to use the binoculars to find six Your mission is to use the binoculars to find six animals and tell what they are doing. You may animals and tell what they are doing. You may also write down signs of animals like tracks, also write down signs of animals like tracks, webs, nests, or scat. webs, nests, or scat.

You must also check the turbidity.You must also check the turbidity.

Group 2: Nets Group 2: Nets Your team’s mission will be to collect as many Your team’s mission will be to collect as many

different types of animals as you can.different types of animals as you can. I will be at the nets station the entire time to help I will be at the nets station the entire time to help

you scoop and show you where to scoop. you scoop and show you where to scoop. We will collect and classify our data. What does We will collect and classify our data. What does

classify mean?classify mean?

Group 3: Chemistry StationGroup 3: Chemistry Station

At this station you will take the pH, At this station you will take the pH, temperature, and the dissolved oxygen. temperature, and the dissolved oxygen.

It will take 1-2 minutes for the thermometer It will take 1-2 minutes for the thermometer to get an accurate reading. Make sure you to get an accurate reading. Make sure you wait long enough between tests. wait long enough between tests.

Group 4: MicroscopesGroup 4: Microscopes

Your team’s assignment will be to look at four or Your team’s assignment will be to look at four or more different things underneath the field more different things underneath the field microscopes. Then you draw what you see. microscopes. Then you draw what you see.

The best thing about your station is you can look The best thing about your station is you can look at whatever you want!at whatever you want!

LETS GO TO THE POND!!LETS GO TO THE POND!!

Remember to stay in your station Remember to stay in your station Walk on the trail and stay behind meWalk on the trail and stay behind me

HAVE FUN!HAVE FUN!