TONIGHTS HW – SCIENCE IV (Brown book) Read p48-51 Q’s 1,2,3abc,4,5,9.

Slides:

Advertisements

Similar presentations

Agriculture and Nutrient Cycles Chapter 2.7. Agriculture and Nutrient Cycles The seeds, leaves, flowers and fruits of plants all contain valuable nutrients.

Advertisements

Definitions Bioaccumulation Bioaccumulation is the process by which substances not readily broken down or excreted can build up and be stored in living.

Pesticides. What are Pesticides? Pesticide: Any substance used for the purpose of destroying or controlling pests. Used in agriculture to protect crop.

Pesticide, Bioaccumulation and Biomagnification

Agriculture and Nutrient Cycles Chapter 2.7. Agriculture and Nutrient Cycles The seeds, leaves, flowers and fruits of plants all contain valuable nutrients.

Pests & Pesticides Pest: any plant, animal, or other living organism that causes illness or harm and is an annoyance to humans.

Matter in Ecosystems & Pesticides Science Cycling of Matter in Ecosystems Organic substances – –Contain atoms of Carbon and Hydrogen –Are broken.

Fertilizer and Ecosystems Read the first paragraph of “Fertilizer and ecosystems” on page 70 (10 minutes) Question What can happen to organisms when too.

Pesticides Science Pest Pests are living organisms that are not wanted around us. Examples of pests include unwanted dandelions growing in the lawn;

P ART 4-L ESSON 1 The effect of excessive use and long-term consequences of using some pesticides.

What is Bioaccumulation?

1 Pesticides Section 1:11 pp What are pests? Pests are living organisms that are not wanted around us. Organisms that people consider to be harmful.

Pesticide, Bioaccumulation and Biomagnification

1 Pest Control. 2 Pests  Biological Pests –any species that competes with us for food, invades lawns and gardens, destroys food, and spreads disease.

Pests and Pesticides.

(c) McGraw Hill Ryerson Effect of Bioaccumulation on Ecosystems Amphibians (like frogs) live on both land and in the water.  They are also sensitive.

2.3 Effect of Bioaccumulation on Ecosystems  Amphibians are valuable indicators of environmental health because they’re sensitive to chemical changes.

Effects of Bioaccumulation on Ecosystems

Toxins in Food Chains. Feeding the human population is a big business, economically. To prevent foods from being eaten by pests, we put chemical substances.

Bioaccumulation and Biomagnification. Bioaccumulation This is the way materials become concentrated in the tissues of a living organism. Biomagnification.

(c) McGraw Hill Ryerson 2007 Chapter 2 Energy Flow & Nutrient Cycles 2.3 Effects of Bioaccumulation on Ecosystems p Words to Know: Bioaccumulationkeystone.

Bioaccumulation and Biomagnification

Food Chain and Food Web Review….. Q: Primary Producers? Primary consumers? Secondary consumers? Tertiary consumer?

Pesticides SNC1D. Pest Pests are living organisms that are not wanted around us. Examples of pests include unwanted dandelions growing in the lawn; rodents.

Today, 3/13/14 Notes – Bioaccumulation/Biomagnification Operation: Cat Drop Activity Individual work Review Exit Slip Notes – Bioaccumulation/Biomagnification.

IB ESSThursday, October 16 th DO NOW: Do you think there might be toxins in your food? How would they get there? Lab Questions are due tomorrow!

Bioaccumulation and Biomagnification Tracing Pollution Through An Ecosystem.

2.3 Effect of Bioaccumulation on Ecosystems

SCIENCE 10 O2 Pesticides and DDT. What are Pesticides? PESTICIDES: chemicals that are designed to kill pests. PEST: any organism that people consider.

Biological Magnification. The problem occurs when a pollutant, such as DDT or mercury, is present in the environment. Chemically, these pollutants resemble.

Definitions Bioaccumulation Bioaccumulation is the process by which substances not readily broken down or excreted can build up and.

Biomagnification Lesson

Grade 9 Science Ms. Brothers. There are no “pests” in nature… it is all subjective… Organisms that might compete or damage crop species (reduce yield)

Pesticides Case Study.

1.14 Bioaccumulation and Biomagnification (Sec 5.3 pg )

Warmup- Symbiosis Worksheet Get out Homework and turn it in!! Essential Question- What happens when humans introduce chemicals into the environment?

Science 10 Mr. Francis 5.3 – Bioaccumulation and Biomagnification.

2.3 Effect of Bioaccumulation on Ecosystems

Bioaccumulation. Bioaccumulation  Accumulation of chemicals in an ecosystem  Higher and higher concentrations accumulate in organisms  Chemicals ingested.

Pesticides, diseases, and DDT 1)What are two ways chemicals get into the environment? b) What is the difference between persistent and non-persistent?

2.3 - Effect of Bioaccumulation on Ecosystems Amphibians (ie. frogs) live both on land and in water. They are sensitive to chemicals changes in the environment,

 Pests are organisms that live in areas where they are not wanted. They cause harm to crops, people or animals.  Pesticides can help rid the areas of.

Chemical Control. What is chemical pesticide control?  Chemical pesticides use chemicals (synthetic or natural) to kill the targeted pest.  When using.

Pests & Pesticides. What is a pest? Pests are organisms that ______________________________________ –May contribute to ______________ loss Pests that.

Pesticides Science 10. Pest – is an organism that people consider harmful or inconvenient Pest – is an organism that people consider harmful or inconvenient.

Pests, Poisons and Pesticides

Trophic Efficiency p. 306.

14.4 Problems with Pesticide Use

Bioaccumulation BioAMplification.

Bioaccumulation and Biomagnification

Bioaccumulation and Biomagnification

Bioaccumulation and Biomagnification

Biological Magnification

Pesticides Pesticides are chemicals designed to kill pests.

Bioaccumulation Bioaccumulation is what happens when the concentration of pesticides first sprayed on the soil builds up as it passes through the food.

2.3 Effect of Bioaccumulation on Ecosystems

Biological Magnification

2.3 Effect of Bioaccumulation on Ecosystems

Bioaccumulation & Biomagnification

Pests, Poisons and Pesticides

Pests & Pesticides Learning Goals:

Pests & Pesticides Section 4.4 & 4.5.

Water quality and pollutants

Water quality and pollutants

Biomagnification.

Human Impacts on Ecosystem (Part 2)

Water quality and pollutants

Energy Flow Through Ecosystems

6.3 - Hazards and Benefits of compounds

Presentation transcript:

TONIGHTS HW – SCIENCE IV (Brown book) Read p48-51 Q’s 1,2,3abc,4,5,9

Things that cause pollution Fertilizers – (N,P,K) organic, inorganic Pesticides – herbicides, insecticides, fungicides Sewage – organic and inorganic components Toxic Substances from landfills and industry

Pesticides Chemicals that are designed to kill pests Pests – are any organism that people consider harmful or inconvenient As early as 500 B.C. chemicals like Sulfur were used to kill crop eating pests. Today almost 2.3 million tons of pesticides are used yearly. This is about.4 kg per person.

Problems with Pesticides Can enter the food chain by being eaten directly or through runoff Move through the food chain as organisms eat each other Take a long time to break down Can be fat soluble not water soluble (stay in the body) Over 98% of sprayed insecticides and 95% of herbicides reach a destination other than their target species Can cause birth defects and cancer in humans

Biomagnification (Bioamplification) The build up of toxic chemicals through successive trophic levels in the food chain The most effected animals are at the top of the food chain.

Example DDT

EXAMPLE MERCURY

In order for a pollutant to biomagnify, the following conditions must be met: The pollutant must be “long-lived”. And can not be broken down easily. Why? The pollutant must be concentrated by producers. (Bioaccumulation) Why? The pollutant must be fat-soluble. Why?