biology today third edition l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Biology Today Third Edition PowerPoint Presentation
Download Presentation
Biology Today Third Edition

Loading in 2 Seconds...

play fullscreen
1 / 43

Biology Today Third Edition - PowerPoint PPT Presentation


  • 302 Views
  • Uploaded on

0 Biology Today Third Edition Eli Minkoff • Pam Baker Chapter 19 Protecting the Biosphere Copyright © 2004 by Garland Science Chapter 19 Protecting the Biosphere A. Review Mature, Natural Ecosystem Stable, chemical recycling, energy flowing No pollution B. Pollution

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Biology Today Third Edition' - betty_james


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
biology today third edition

0

Biology TodayThird Edition

Eli Minkoff • Pam Baker

Chapter 19

Protecting the Biosphere

Copyright © 2004 by Garland Science

slide2

Chapter 19

  • Protecting the Biosphere
  • A. Review Mature, Natural Ecosystem
      • Stable, chemical recycling, energy flowing
      • No pollution
  • B. Pollution
      • Wrong place, time, amount
      • Measurement
      • Sentinel species (canaries)
      • Toxic substances
slide3

Chapter 19

  • Protecting the Biosphere
  • C. Human Activity
      • Water pollution and sources
      • Water usage, clean-up and treatment
      • Air pollution
      • Outdoor / indoor
      • Acid rain
      • CFC’s and ozone
      • CO2 and greenhouse effect
  • D. Reducing your (negative) impact on environment?
      • How can you?
mature natural ecosystem

0

Mature Natural Ecosystem
  • Stable population (climax community).
  • Sunlight supplies the energy.
  • Chemical are cycled (short term).
  • Energy flows through the system.
slide9

0

There is no pollution (contamination) in a mature natural ecosystem

Pollution:

  • Anything present in the
      • wrong place**
      • wrong time
      • wrong amount

Problem of quantities

slide10

0

Problem of quantities

How do we measure pollution?

  • known chemical identified
    • monitor [conc] in time & space
  • sentinel species
    • organisms sensitive to pollutants

canaries in mines

slide11

study the damage done to organisms by poisons (pollutants)

0

Toxicology

  • Toxic substances often affect:
        • nervous system
        • reproductive system

e.g., DDT, dioxins

slide12

0

Pollution prevention

Cost / Benefits

slide13

Human activity affects ecosystems

0

Water pollution

Agricultural runoff

Industrial waste

Human sewage

Accidental spills

Some

sources:

slide14

0

Bioremediation

Using organisms (like decomposers) to help remove toxic substances from the environment

e.g.,

using bacteria to cleanup oil spills

slide15

0

Bioremediation of water

human waste water

gray water

Methods of treatment

natural stream/soil action

septic tanks

slide17

0

Bioremediation of water

human waste water

gray water

Methods of treatment

natural stream/soil action

septic tanks

lagoons

wastewater treatment plants

slide18

0

Wastewater treatment

primary particulates settle out

secondary aerobic bacteria work

water is chlorinated and released

tertiary remove N2

slide19

0

drinking water

  • Sources:
      • rivers/lakes
      • wells
      • treated wastewater
slide20

0

drinking water

  • Treatment:
      • holding tanks
      • flocculation
      • filtration
      • chlorination (fluorination)
slide22

0

Air pollution

Some sources:

outdoor

vehicles

factories

fires

indoor

outdoor stuff

bacteria

chemicals

2nd hand smoke

slide23

H2SO4

0

Air pollution

Acid rain (deposition)

SO2 (sulfur dioxide)

Reacts to form

sulfuric acid

NO2HNO3

nitric acid

slide24

0

pH

fig. 10-9

slide26

0

Acid rain

Automobiles and factories

Global problem

crosses political boundaries

Illinois/Indiana New York

Germany Sweden

slide28

0

The Ozone layer

filters out harmful UV light

damaged by CFC’s - banned

slide30

0

CO2 and global warming

We release CO2

Plants use CO2

Burning fossil fuels

releases more CO2

slide33

Global footprint exercise

www.myfootprint.org

slide35

Chapter 15

  • Mind and Body
  • A. Factor affecting health
        • genetics, lifestyle, diet, exposure
  • B. General (innate) Immunity
        • skin / inflammation / lymphatics
  • C. Specific Immunity
        • antigens and antibodies
        • lymphocytes
          • B-cells and antibody production
          • T-cells
        • Active and passive immunity

0

slide36

Chapter 15

  • Mind and Body
  • D. Immune problems
        • Autoimmunity
        • Allergies
        • Transplant rejection
        • Immunosuppression
  • E. Link to nervous and endocrine systems
        • Autonomic nervous system
        • Sympathetic and Parasympathetic
        • Stress
        • Placebo effect

0

slide37

Chapter 16

  • HIV and AIDS
  • A. Definitions and History
        • AIDS, Th cells, clusters
        • Koch’s postulate
  • B. Viruses
        • What are they?
        • How do they reproduce?
  • C. HIV infection
        • Stages/Symptoms
        • Tests/Treatment/Prevention

0

slide38

Chapter 17

  • New Infectious threats
  • A. Definitions
        • infection, pathogen, epidemic, pandemic
  • B. Diseases
        • Factors affecting how diseases spread:
          • Host susceptibility/pathogen virulence
          • Herd Immunity
          • Weather
          • Route of transmission
          • Direct contact
          • Food
          • Water

0

slide39

Chapter 17

  • New Infectious threats
  • C. Specific problems
        • Bioterrorism: Anthrax/Small pox/?
        • STD’s: bacterial/viral
        • Antibiotic resistance

0

slide40

Chapter 18

  • Biodiversity
  • A. Definitions
        • biodiversity, communities
  • B. Diversity
        • Value of biodiversity ?
        • Ways to preserve
        • Loss of diversity Extinction (true- or pseudo-)

0

slide41

Chapter 18 Biodiversity

  • C. Ecosystems (Biomes)
        • Changes in communities
          • Sucession – primary and secondary
        • Climax Community is mature, natural ecosystem
          • stable population
          • sunlight supplies energy
          • chemical are cycled
          • energy flows through system (lost as heat)
        • Destruction of ecosystems
          • examples:
          • deforestation
          • desertification

0

slide42

Chapter 19

  • Protecting the Biosphere
  • A. Review Mature, Natural Ecosystem
      • Stable, chemical recycling, energy flowing
      • No pollution
  • B. Pollution
      • Wrong place, time, amount
      • Measurement
      • Sentinel species (canaries)
      • Toxic substances
slide43

Chapter 19

  • Protecting the Biosphere
  • C. Human Activity
      • Water pollution and sources
      • Water usage, clean-up and treatment
      • Air pollution
      • Outdoor / indoor
      • Acid rain
      • CFC’s and ozone
      • CO2 and greenhouse effect
  • D. Reducing your (negative) impact on environment?
      • How can you?