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Transcript of AB Which do you like better? Circa 1910 AB Which do you like better? Sugar cane.
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A B
Circa 1910
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A B
Sugar cane
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Bio =
BioBiodiversitydiversity
What does “Bio” mean?
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BioBiodiversitydiversity
Diversity = Variety
What does “Diversity” mean?
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- “The variety of life in all its forms, levels and
combinations”
- Includes:ecosystem diversity, species diversity,
and genetic diversity
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• Scientists have identified more than 2 million species. Tens of millions -- remain unknown
•The tremendous variety of life on Earth is made possible by complex interactions among all living things.
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Main idea: Biodiversity maintains a healthy biosphere and provides direct and indirect value to humans.
Objectives:Describe three types of biodiversity.Explain the importance of biodiversity.Summarize the direct and indirect value of
biodiversity.
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There are 3 components of biodiversity 1. Diversity of genes
Chihuahuas, Greyhound and Newfies are all dogs—but they're not the same because their genes are different.
ChihuahuaChihuahua NewfoundlandNewfoundlandGreyhoundGreyhound
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Genetic Diversity The variety of genes or inheritable
characteristics that are present in a population comprises its genetic diversity.
Genetic diversity within an interbreeding population increases the chances that some species will survive during changing environmental conditions or during the outbreak of disease.
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Diversity of speciesDiversity of species. .
Hoary Bat
There are 3 components of There are 3 components of biodiversity biodiversity
Iwi Kahuli
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Species DiversitySpecies Diversity
The number of different species and the relative abundance of each species in a biological community is called species diversity.
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Biodiversity provides us with: Natural Resources (food, water,
wood, energy, and medicines) Natural (Ecosystem) Services
including: air and water purification, soil fertility, waste disposal, pest control)
Aesthetic pleasure
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Variety of ecosystemsVariety of ecosystemsEach one is different, with its own set of Each one is different, with its own set of species living in it.species living in it.
Desert Tropical Rain Forest tiaga
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Biodiversity has Intrinsic Value
Intrinsic Value = Something that has value in and of itself
Source: Burmbaugh © AMNH-CBC
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Biodiversity also has Utilitarian Value
Utilitarian Value = the value something has as a means to another’s end.
Utilitarian values include:• Goods• Services• Information
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What do we get from biodiversity?
OxygenFoodClean WaterMedicineAesthetics Ideas
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Direct Use Value: GoodsFoodBuilding MaterialsFuelPaper ProductsFiber (clothing,
textiles)Industrial
products (waxes, rubber, oils)
MedicineSource: © AMNH-CBC
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Food
Today, most people rely on ~20 types of plants, and only 3 to 4 are staple crops.
Diversity is critical for developing new strains and breeds, i.e. that suit a particular environment or are resistant to pests or disease and as a source of new crops
Source: © AMNH-CBC
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Building Materials, Paper Products, and Fuel
Sourc
e:
© A
MN
H-C
BC
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Source: USDA Photo b Ken Hammond
Source: USDA Cotton Program
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Originating plant or animal Product/End useCork oak (Quercus suber) CorkPARē RUBBER TREE (HEVEA
BRASILIENSIS)Rubber
Lac insect (Laccifer spp.) shellacCARNAUBA PALM (COPERNICIA CERIFERA) CARNAUBA WAX
Wax plant (Euphorbia antisyphilitica) candelilla waxJojoba plant (Simmondsia chinensis) jojoba oilCochineal insect (Dactylopius coccus) CARMINE DYE*
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MedicineAbout 80% of the
people in developing countries use plants as a primary source of medicine.
57% of the 150 most-prescribed drugs have their origins in biodiversity
Source: © AMNH-CBC
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Drug
Source Use
Barbaloin, aloe-emodin Aloe (Aloe spp.) antibacterial, skin conditions, purgative
Atropine Belladonna (Atopa belladonna)
Relaxant, sedative
Codeine Opium poppy (Papaver somniferum)
Painkiller
Colchicine Autumn crocus (Colchicum autumnale)
Anticancer agent
Digitoxin Common foxglove (Digitalis purpurea)
Cardiac stimulant
Ephedrine, Pseudoephedrine
Joint fir (Ephedra sinica)
Asthma, emphysema, bronchiodilator, hay fever
L-Dopa Velvet bean (Mucuna deeringiana)
Parkinson’s disease
Menthol Mint (Menta spcs.) Nasal congestion Morphine Opium poppy
(Papaver somniferum) Painkiller
Quinine Yellow cinchona (Cinchona ledgeriana)
Malaria
Reserpine Indian snakeroot (Rauvolfia serpentina)
Hypertension
Scopolamine Thornapple (Datura metel)
Sedative
Taxol Pacific Yew (Taxus brevifolia)
Anticancer
Vinblastine, vincristine Rosy periwinkle (Catharanthus roseus)
Leukemia
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Indirect Use Values: Services Regulating global processes,
such as atmosphere and climate
Soil and water conservationNutrient cyclingPollination and seed dispersalControl of agricultural pestsGenetic library Inspiration and informationScientific and educationalTourism and recreationCultural, spiritual, and
aestheticCommunity ResilienceStrategic
Source: © AMNH-CBC
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Global Processes : Atmospheric Regulation
Photosynthetic biodiversity created an oxygenated atmosphere, and also has the potential to moderate the rising amounts of atmospheric carbon dioxide linked to global climate change
Source: Frey © AMNH-CBC
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Global Processes: Climate RegulationForests and other vegetation modify climate: by
affecting sun reflectance, water vapor release, wind patterns and moisture loss.
Forests help maintain a humid environment, for example, half of all rainfall in Amazon basin is produced locally from forest-atmosphere cycle
Source: Bain © AMNH-CBC
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•Filters excess nutrients and traps sediments that would otherwise impact neighboring marine and aquatic areas
Other services:•Minimizes damage from waves and floods•Serves as a nursery for juvenile commercial fish •Provides habitat for many birds, fish, and shellfish
Source: Ersts © AMNH-CBC
Example: Coastal wetlands and mangroves
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Nutrient CyclingBiodiversity is critical to nutrient
cycling and soil renewalDecomposers such as algae, fungi, and bacteria
Source: Snyder © AMNH-CBC
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Pollination and Seed DispersalMany flowering plants depend on animals
for pollination to produce food.
30% of human crops depend on free services of pollinators; replacement value estimated billions of rupees/year in India alone
Source: Spector© AMNH-CBC
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Source of Inspirationor Information
Biomimicry
Applied Biology
Medical Models
Education and Scientific Research Source: Brumbaugh © AMNH-CBC
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Medical Models
Hibernating bears may improve the treatment of:
trauma patientskidney diseaseosteoporosis
Source: New Jersey Fish and Wildlife
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Spiritual and Cultural ValuesThe survival of natural areas and species are
important to different cultures around the world.
Thousands of cultural groups in the world, each have distinct traditions and knowledge for relating to natural world
Source: Projecto Gato Andino Bolivia, Villalba & Bernal, 1998
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Source: Brumbaugh © AMNH-CBC
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Ecological Value: Does Diversity Make Communities More Resilient?
Resilient ecosystems are characterized by:Constancy (Lack of fluctuation)Inertia (Resistance to perturbation)Renewal (Ability to repair damage)
Not all species are critical to an ecosystems function; many fill redundant roles; basis for community resilience and integrity
If too many species or keystone species are lost, eventually it leads to the failure of ecosystem function
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Source: Brumbaugh © AMNH-CBC
http://research.amnh.org/biodiversity/crisis/index.html
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Non-Use or Passive Values
Existence value
Bequest value
Potential or Option value
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Biodiversity
Collections
Accreditation criteria
Apply to campus tree collections
Homework: go to a ‘Collection’
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In situ conservation Setting up wild life reserves is not just a matter of building a fence around an area and letting it grow “wild”
Without grazing animals heathlands which contain a number of rare species will revert to woodland
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Nature reserves and national parks First the area that is suitable for the creation of a
reserve has to be identified and delimited
This requires surveys to collect data on key species
Property may have to be expropriated
A legal framework may need to be set up to control human activities in the area and in it’s immediate surroundings
Policing the area may also be necessary
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IUCN Red ListIUCN Red ListInternational Union for Conservation of Nature
Nine categories:ExtinctExtinct in the WildCritically EndangeredEndangeredVulnerableNear ThreatenedLeast ConcernData DeficientNot evaluated Yellow-crested cockatoo (Critically Endangered)
less than 7000 individuals remain
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Which conservation organisations do you know?WWFConservation InternationalFlora and Fauna InternationalWildlife Conservation SocietyBirdlife InternationalThe Nature Conservancy
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Biodiversity HotspotsBiodiversity HotspotsConservation International use
two factors to determine which areas qualify as a global biodiversity hotspot:
Number of endemic vascular plant species (those found nowhere else)
Amount of original habitat lost
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Biodiversity HotspotsBiodiversity Hotspots
Each hotspots contains over 1,500 endemic vascular plants species
This represents over 0.5% of the world’s total vascular endemic plant species
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Biodiversity HotspotsBiodiversity HotspotsDegree of threat was determined by the percentage of
remaining habitat within a region, with each hotspot retaining less than 30 percent of its original natural habitat
Some of the hotspots have less than 10 percent of the original natural habitat
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Biodiversity HotspotsBiodiversity Hotspots
Overall, the 34 hotspots once covered 15.7% of Earth’s land surface
86% of the hotspots’ habitat has already been destroyed
Intact remnants of the hotspots now only cover 2.3% of the Earth’s land surface
Hold at least 150,000 endemic plant speciesContain 11,980 endemic terrestrial vertebrate
species
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EducationResearchSpecies
distributionsSpecies
classificationConservation and recovery programs
Role of Biodiversity Collection
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Should we be concerned about biodiversity?
What we know: The Earth is losing species at an alarming rate
Some scientists estimate that as many as 3 species per hour are going extinct and 20,000 extinctions
occur each year. when species of plants and animals go extinct, many
other species are affected.
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Threats to biodiversity
HHabitat Loss
IIntroduced Species
PPollution
PPopulation Growth
OOver-consumption
HIPPO Dilemma
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Habitat loss/destruction Habitat loss is the greatest reason for biodiversity loss. Habitat loss is due to:•Conversion of natural
areas to farms, houses, etc
•Fragmentation of ecosystems by human activities, housing, transportation, agriculture etc.
•Simplification of genetic diversity and complex ecosystems by planting/selecting monocultures.
http://en.wikipedia.org/wiki/File:Lacanja_burn.JPG
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Invasive / Exotic Species
•Invasive, exotic species introduced from elsewhere outcompete native species because they:
•Have no natural predators•Colonize disturbed habitats quickly•Have a high biotic potential (r-species)
http://en.wikipedia.org/wiki/File:Kudzu_on_trees_in_Atlanta,_Georgia.jpg
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Pollution
Pollution (Oil spills, human agricultural waste, fertilization, pesticides, acid
deposition, greenhouse gases etc) caused by human activities has a negative effect
on biodiversity
http://en.wikipedia.org/wiki/File:AlfedPalmersmokestacks.jpg
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Population, Human overpopulation that is.
6.8 Billion and counting. The expansion of human population and affluence, especially in
the developing world harms natural ecosystems.
http://en.wikipedia.org/wiki/File:World_population.svg
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Overharvesting, Overuse, Overexploitation
Overhunting, overfishing, destructive harvesting practices (cyanide, dynamite),
illegal trade, exotic pet industry
http://en.wikipedia.org/wiki/File:Fishing_down_the_food_web.jpg
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HumanPopulation
Increase
IncreasingEconomic
Activity
Increased use of technology
Social, politicaland cultural
factors
Land use change(Habitat loss)
IncreasingEconomic
Activity
Increased use of technology
Social, politicaland cultural
factors
Indirect (Underlying
causes)
Directcauses
DecliningBiological Diversity
Raven, Berg, and Hassenzahl put it this way
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Characteristics shared by many endangered species include:
• Low reproductive rate (biotic potential)• Feed at high trophic levels (apex predator)• Large body size• Specialist
Specialized feeding habitsSpecialized nesting and/or breeding areasFixed migratory patternsFound in one place or region
• Rare • Commercially valuable• Negative human interactions including attacks on
people or livestock
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Why should we worry about conservation? Ethics = we know what we are doing
and its negative effects is it right to continue this?
Aesthetics = the natural world is more beautiful than strip malls and roads should we keep it around?
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Genetic resources = end result of millions of years of evolution – unique gene combinations for disease resistance, chemical production, etc
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
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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
Ecosystem support = the interactions of the world are all connected effect one effect it all
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BiodiversityCollection
AccreditationOrganization
State Agency orPrivate Organization
Community Visitor Industry
CommunityVolunteers
HistoricalAgreements