Conservation of Biodiversity IB syllabus: 4.3.1 – 4.3.5 AP Syllabus Ch. 8, 22,
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Transcript of Conservation of Biodiversity IB syllabus: 4.3.1 – 4.3.5 AP Syllabus Ch. 8, 22,
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Conservation of Biodiversity
IB syllabus: 4.3.1 – 4.3.5
AP Syllabus
Ch. 8, 22,
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Syllabus Statements• 4.3.1: State the arguments for preserving species
& habitats• 4.3.2: Compare the role and activities of
governmental & non-governmental organizations in preserving and restoring ecosystems and biodiversity.
• 4.3.3: State and explain the criteria used to design reserves
• 4.3.4: Evaluate the success of a named protected area.
• 4.3.5: Discuss & evaluate the strengths and weaknesses of the species based approach to conservation
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Why should we worry about conservation?
A. Ethics = we know what we are doing and its negative effects is it right to continue this?
B. Aesthetics = the natural world is more beautiful than strip malls and roads should we keep it around?
C. Genetic resources = end result of millions of years of evolution – unique gene combinations for disease resistance, chemical production, etc
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Why should we worry about conservation?
D. Commercial = many of the products we rely on result from the biotic component of the planet
- opportunity cost value of the next best alternative forgone as a result of making a choice
-implies choice of results that are mutually exclusive
E. Life support = plants produce the oxygen we need to survive, soil provides the means for growing food, organisms/processes cycle and purify the water we need
F. Ecosystem support = the interactions of the world are all connected effect one effect it all
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Opportunity Costs
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How can we reduce biodiversity loss?
• 2 main approaches – ecosystem or species directed
1. Preventing premature extinction of species
2. Preserving & restoring ecosystems which provide habitats and resources for the world’s species
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The Species Approach The Ecosystem Approach
Goal
Protect species frompremature extinction
Strategies
• Identify endangered species
• Protect their critical habitats
Tactics
• Legally protect endangered species
• Manage habitat
• Propagate endangered species in captivity
• Reintroduce species into suitable habitats
Goal
Protect populations ofspecies in their naturalhabitats
Strategy
Preserve sufficient areasof habitats in differentbiomes and aquaticsystems
Tactics
• Protect habitat areas through private purchase or government action
• Eliminate or reduce populations of alien species from protected areas
• Manage protected areas to sustain native species
• Restore degraded ecosystems
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Protection of Wild species• CITES – convention on international trade in
endangered species (1975)
• 152 countries – 900 species regulated as endangered, 29,000 species regulated as threatened
• Helped reduce international trade in many organisms, organized international awareness, protected habitats
• Enforcement is difficult, Consequences are weak, Countries have a choice, value of organisms may increase
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Protection of Wild species
• CBD – convention on biodiversity extends CITES to conserve biodiversity in general 172 countries
• Focused on reversing trends in loss of biodiversity
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Bio
diversity
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National Legislation
• The Lacey Act – 1900– Prohibits transporting live or dead wild animals
or their parts across state borders without a federal permit
• The Endangered Species Act – 1973– Makes it illegal for Americans to import or trade
in any product made from an endangered or threatened species unless it is used (1) for approved scientific purposes or (2) to enhance the survival of the species
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Other Means of protection
• Gene banks & Seed banks
• Botanical gardens, Farms
• Zoos & Aquariums
• Captive breeding & Reintroduction programs
• Aesthetic vs. Ecological value
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Evaluating Species based Approaches – Captive breeding
Strengths1. Organisms safe from
poachers2. Ensure good chance
of offspring survival3. Artificial insemination
possible4. Cross fostering is
possible – raised by parent of similar species
Weaknesses1. It is artificial2. Organisms not born in
the wild may not be able to survive reintroduction
3. Few actually returned to wild
4. Lack of habitat to return them to
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Evaluating Species based Approaches – Aesthetic value
Strengths
1. Tourism & recreation – use promotes interest
2. “Sexy megafauna” get public interested in conserving whole habitats
3. Personal approach appeals to people
“Save the manatee”
Weaknesses
1. More interactions with people – more damage potentially
2. People may overlook the deeper values
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Evaluating Species based Approaches –Ecological values
What’s good?
1. Shows people the true critical value of species
2. See how it effects us – food web links, nutrient cycling, keystone species
What’s bad?
1. May go over the heads of the general public
2. May be hard to quantify this for some species
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Preserves – If you save a habitat you get all of the species
• National Parks
• 1,100 parks in 120 countries
• US – established in 1912 55+ total parks
• Supplemented by state, county & local park systems
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National parks and preserves National forests (and Xs) National wildlife refuges
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National parks and preserves National forests (and Xs) National wildlife refuges
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Moderate mineral deposits
Rich mineral deposits
Federal land
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Moderate mineral deposits
Rich mineral deposits
Federal land
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Park Problems
• Only 1% of parks in developing countries are actually protected, most are “paper parks”
• Often invaded by people looking for subsistence or those looking for profit
• Often too small to sustain larger species• Nonnative invasions• Parks are too popular high traffic, pollution• Lack of funding – overworked underpaid staff, Worn
out facilities• Nearby activities including logging, mining, grazing,
power production, water diversion
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Managing Parks successfully
• Currently practice natural regulation, treat as self sustaining ecosystem– Often too small to self sustain– Effected by nearby activities, destruction from
within from unbalanced food webs (elk grazing)
• Conflicting goals (1) conserve nature, (2) make nature available to public
• Are there solutions?
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Suggestions for the future
1. Integrate management for parks & nearby federal lands
2. Increase budget (1) add new parklands near old (2) buy existing private land within parks (3) maintenance
3. Locate commercial facilities outside of parks
4. Better surveys of wildlife conditions
5. Raise entry fees
6. Limit number of daily, yearly visitors
7. Encourage corporate sponsorship
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How much land should be protected?
• Need a worldwide network of supported, connected refuges
• At least 20% of earth’s land area should be preserved – conservationist view– Areas vital to sustaining life on earth and
continuing adaptation & evolution
• Less than current 10% should be preserved – developer view– Areas contain valuable resources to aid in
economic growth
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Costa Rica’s Example
Nicaragua
CostaRica
Pacific Ocean
Panama
Caribbean Sea
Peninsula Osa
Pacifico Central
CordilleraVolcanica Central
Bajo Tempisque
Arenal
GuanacastleLlanuras deTortuguero
La Amistad
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Principles for reserve design
1. Ecosystems are rarely at a stable point – hard to lock them and protect them from change (nonequilibrium state)
2. Ecosystems which experience frequent, moderate disturbance have the greatest diversity (intermediate disturbance hypothesis)
3. View most reserves as habitat islands in a sea of developed or fragmented lands
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Recall Island Biogeography theories
• Diversity on islands is a function of size and distance from mainland (balance extinction vs. colonization)
• Help determine …– Areas in greatest danger– Size of reserve that will be necessary– How closely must small reserves be spaced to
allow immigration– Size & # of protective corridors connecting parks
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The Island Effect
• Isolated ecosystems studied by MacArthur and Wilson in 1960’s
• Diversity effected by island size & degree of isolation
• Island Biogeography theory: diversity effected by – Rate of species immigration to island– Rate of extinction on island– Equilibrium point = species diversity
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High
Low
Rat
e o
f im
mig
rati
on
or
exti
nct
ion
Equilibrium number
Immigration and extinction rates
Number of species on island
(a)
© 2004 Brooks/Cole – Thomson Learning
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Island Biogeography
• Immigration and Extinction Effected by1. Size:
– small island has less immigration (small target), – Small island has fewer resources, more extinction
2. Distance from mainland:– Closer to mainland more chance of immigration
• Applied in conservation for “habitat islands” like national parks surrounded by development
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High
Low
Rat
e o
f im
mig
rati
on
or
exti
nct
ion
Small island
Effect of island size
Number of species on island
(b)
Large island
© 2004 Brooks/Cole – Thomson Learning
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Island Biogeography Data
• South Pacific Islands study looked at bird diversity as distance from New Guinea increased
• Caribbean Island study found bigger islands had more species diversity than smaller islands which were otherwise similar
100
50
25
12.5
6.250 2,000 4,000 6,000 8,00010,000
Distance from New Guinea (kilometers)
Nu
mb
er o
f sp
ecie
s (p
erce
nta
ge
of
sam
ple
stu
die
d)
NEW GUINEA
100
1 10 100 1,000 10,000 100,000Area (square miles)
Nu
mb
er o
f am
ph
ibia
n a
nd
rep
tile
sp
ecie
s
10
SABAMONTSERRAT CUBAHispaniola
Puerto Rico
JamaicaCuba
MontserratSaba
Redonda
© 2004 B
roo
ks/Co
le – Th
om
son
Learn
ing
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Critical Questions
• What shape should the reserve be?• Is one large or many small reserves
better?• Is a heterogenous or homogenous reserve
better?• Should corridors connect small reserves
together?• What is the importance of buffer zones
around reserves?
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Core
Core
Both Reserves are the samearea
Which do you think would be better? Why?
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The everglades a case study
The value of wetlands
1. Flood control / water storage
2. Habitat for many species
3. Recharge for aquifer
4. Water filtration / purification
Inland and coastal Wetlands are protected because of their value in terms of biodiversity, and the ecological & economic services they provide
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Slight changes in elevation (only inches), water salinity, and soil create entirely different
landscapes, each with its own community of plants and animals.
Everglades Habitats
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Everglades II• Permits are required to fill or disturb wetlands in
US > 3 acres
• Current attempts to weaken protective measures, small percentage even still remain
• Now trying for a zero net loss of wetlands mitigation banking: destroy one, rebuild another
• Restoration & protection projects are often successful
• Also created for farm & sewage waste treatment
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Everglades III• South Florida – once 100 km wide knee deep
sheet of water moving from Lk. Okeechobee to FL Bay
• On its way south it created various wetlands with a wide variety of species
• Sawgrass is the dominant plant species
• Today 56 endangered & threatened species reside there
• Supplies drinking water directly or through Floridian & Biscayne aquifers for 6-10 million people
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Everglades IV
• Since 1948 most of water flow has been diverted by 2,250 km. of canals, pumping stations, etc.
• In 1960s meandering 103 mile long Kissimmee R. reformed into straight 84 mile canal by army corps of engineers
• Below Okeechobee intensified agriculture of sugar cane developed
• Now seeing (1) greater inputs of nutrients from fertilizer use (nitrogen & phosphorous)
• (2) Decreased volume of water, moving faster through the system
• (3) Increases in exotic & invasive species
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( )
( )
GULF OFMEXICO
Naples
Fort Myers
FLORIDA
Florida Bay
EvergladesNational
Park
Key Largo
ATLANTIC OCEAN
Miami
FortLauderdale
WestPalmBeach
LakeOkeechobee
Unchannelized
Channelized
FLORIDA
Area ofdetail
Agricultural area
Treatment marsh
Water conservation area
Canal
miles
kilometers
0
0
20
20
40
40 60
60
KissimmeeRiver
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Everglades V• 1947 Everglades National Park established to
preserve the lower end of the system• Contains 20% remaining everglades• Didn’t work because of all of the influences on
the water to the north• 90% of parks wading birds have disappeared• Other vertebrate populations are down 75-90%• Now the country’s most endangered national
park• Florida Bay suffering from less fresh water as
well as cultural eutrophication• Threatens reefs & fisheries in the Keys
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• 1990 state & federal government agreed upon 38 year $7.8 billion restoration project
1. Restore curving flow of the Kissimmee River
2. Remove 400 km of canals blocking water flow south of Lk. Okeechobee
3. Buy 240 km2 of farmland & allow it to flood to filter agricultural runoff before it reaches Everglades National Park (ENP)
4. Add land adjacent to ENP eastern border
5. Create a network of artificial marshes
6. Create 18 reservoirs & drill wells for storage & aquifer recharge in rainy season
7. Build new canals & reservoirs to capture current water lost & return it to ENP
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But…• ENP does not benefit from the first 10
years, $4 billion of the project• Plan seems to favor agricultural /
consumer uses of water over restoring the actual habitat
• The plan does not specify how much of the water moving south will actually go to ENP
• Somehow we must undo 120 years of agricultural & urban development in the area until it is too late
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Evaluation
1. Has the protection of the everglades been successful thus far?
2. Does the local community support it? Think about the farmers in the area, the cities of south east FL, etc.
3. Is there enough funding?
4. Where did the research fail in the past? Where might it fail in the future?
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Organizations supporting Conservation
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WWF: World Wildlife Fund
• Established in 1961• “to conserve the natural environment and
ecological processes worldwide”. • WWF’s mission is to stop the degradation of
the planet’s natural environment and to build a future in which humans live in harmony with nature, by:– conserving the world’s biological diversity – ensuring that the use of renewable natural
resources is sustainable – promoting the reduction of pollution and wasteful
consumption.
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• Role – Promoting awareness & conservation of wildlife
• Activities – Directed mostly at wildlife conservation, work with companies like Nike in reducing CO2 emissions, Aid
• Use of the media – International, internet, newsletters
• Speed of Response – stays current on issues• Diplomatic constraints – international law &
coordination• Enforceability – Limited, no real governmental
power, but broad passive influence
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Greenpeace• Greenpeace exists because this fragile earth deserves a voice.
It needs solutions. It needs change. It needs action.• Greenpeace is a non-profit organization, with a presence in 40
countries across Europe, the Americas, Asia and the Pacific. • To maintain its independence, Greenpeace does not accept
donations from governments or corporations but relies on contributions from individual supporters and foundation grants.
• As a global organization, Greenpeace focuses on the most crucial worldwide threats to our planet's biodiversity and environment.
• We campaign to:--Stop climate change --Protect ancient forests--Save the oceans --Stop whaling --Say no to genetic engineering
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The current Rainbow Warrior was launched on 10 July 1989. The original vessel was sunk in 1985 by agents of the French government in an attempt to foil protests of their nuclear weapons testing in the Pacific.
The plan backfired, sparking worldwide outrage, and the rebuilt ship proved that "you can't sink a rainbow" when it returned to battle successfully against the testing programme. Nuclear testing ended at Moruroa in 1996.
The ship's name was inspired by a North American Indian prophecy which foretells a time when human greed will make the Earth sick, and a mythical band of warriors will descend from a rainbow to save it.
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• Role - More extreme environmental activist group• Activities – Greenpeace's history began in 1971. A group of
ecologists opposed to the war in Vietnam contested US nuclear testing in the north Pacific. They decided simply to position themselves in the middle of the testing zone.
• Use of the media - Embarked on a campaign to save the whales. Using Zodiac inflatables, they put themselves between the whales and the harpoons, generating images too sensational not to broadcast and creating new public pressure.
• Speed of Response – rapid, high profile, technological approach
• Diplomatic constraints – Nonviolent but radical group - Greenpeace's scientific and market research becomes pressure tools.
• Enforceability - Creative nonviolent action mobilizes public opinion against the unsustainable practices of governments or corporations. The objective is to obtain as much coverage as possible through the media in order to mobilize public opinion on certain issues.
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UNEP: United Nations Environment Programme
• Established in 1972
• To provide leadership and encourage partnership in caring for the environment by inspiring, informing, and enabling nations and peoples to improve their quality of life without compromising that of future generations.
•
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• Role – negotiate, monitor, implement environmental treaties
• Activities – focus on consumption issues, energy, food, youth programs
• Use of the media – limited, website• Speed of Response – slower, through government
action• Diplomatic constraints – tied to the UN• Enforceability – underfunded, undersupported
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World Conservation Strategy - 1980• The World Conservation Strategy clarified the ideas of sustainable
development. Its concerns were with the link between the economy and the environment. The environmental programme (UNEP) together with the International Union of the Conservation of the Nation (IUCN) and World Wildlife Fund (WWF) posed ideas to conserve nature. Therefore, suggesting that economic development and growth should be used to enhance the ability of societies to conserve nature. The main aim of the Strategy was to explain how development and conservation of the environment can work together.
• The World Conservation Strategy had a focus on conservation and in placing the main focus on this it does not place as much emphasis on political, social, cultural and economic issues. This was different to the United Nations Conference on Human Environment which was held in 1972. Another difference between the World Conservation Strategy and UNCHE is that the World Conservation Strategy developed ideas on how they could implement and develop sustainable development.
• Quote from the Conference:• "This is the kind of development that provides real improvements in the
quality of human life and at the same time conserves the vitality and diversity of the Earth. The goal is development that will be sustainable. Today it may seem visionary but it is attainable. To more and more people it also appears our only rational option". (The World Conservation Strategy, IUCN, UNEP, WWF 1980)
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• World Conservation Strategy (1980) – Secretariat/focal point: IUCN/UNEP/WWF
Aim/comment: To help advance the achievement of sustainable development through the conservation of living resources. The Strategy:
• explains the contribution of living resource conservation to human survival and to sustainable development;
• identifies the priority conservation issues and the main requirements for dealing with them;
• proposes effective ways for achieving the Strategy's aim.
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World Conservation Strategy Summary Points
1. Maintenance of essential life support systems (climate, water cycle, soils) and ecological processes
2. Preservation of genetic and species diversity
3. Sustainable use of species and ecosystems
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References
• www.iucn.org
• http://www.panda.org (WWF site)
• www.unep.org
• http://www.greenpeace.org/international/
• http://www.cbd.int/
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