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SPECIES AT RISK
SPECIES AT RISKLevels of classification:Extinct: A species that no longer existsExtirpated: A species that no longer exist...
SPECIES AT RISKExtinct: A species that no longer existsSPECIES AT RISKGreat auk Passenger pigeon Sea mink
SPECIES AT RISKExtirpated: A species that no longer exists in aspecific areaPaddlefish Atlantic walrus
SPECIES AT RISKEndangered: A species facing imminent extirpationor extinctionBarn owl Swift fox Northern cricket frog
SPECIES AT RISKThreatened: A species that is likely to becomeendangered if factors reducing its survival are notchangedHum...
SPECIES AT RISKSpecial Concern: A species that may becomethreatened or endangered because of a combinationof factorsPolar ...
SPECIES AT RISKWHY?!-Over-hunting (including over-fishing)-Disease-Change of climate and environment (includingpollution)-...
SPECIES AT RISKHabitat lossHuman activity Impacts on ecosystemReplacing naturalvegetation alongcoastlines andwaterfrontsHa...
SPECIES AT RISKIntroduction of non-native speciesNot all non-native species are harmful, but thosethat are would be consid...
SPECIES AT RISKINVASIVE species: A non-native species whoseintentional or accidental introduction negativelyimpacts the na...
SPECIES AT RISKType of Impact ConsequencesEcological -Invasive species compete with or feed on native species,leading to p...
SPECIES AT RISKControlling introduced species…Chemical Control (pesticides)Mechanical Control (physical barriers or remova...
SPECIES AT RISKPOLLUTION: Acid precipitation
SPECIES AT RISKPOLLUTION: Acid precipitation
SPECIES AT RISKPOLLUTION: Oil spills
SPECIES AT RISKPOLLUTION: Litter
SPECIES AT RISKPOLLUTION: Litter
SPECIES AT RISKHow do we know that a species is at risk?Ecologists count the number of animals of a particular species ove...
SPECIES AT RISKPopulation can also indicate predator-prey relationships.
SPECIES AT RISKWhat happens to the moose population when the wolf populationdeclined?The moose population increases when t...
07 species at risk
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07 species at risk

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  • Transcript of "07 species at risk"

    1. 1. SPECIES AT RISK
    2. 2. SPECIES AT RISKLevels of classification:Extinct: A species that no longer existsExtirpated: A species that no longer exists in a specific areaEndangered: A species facing imminent extirpation orextinctionThreatened: A species that is likely to become endangered iffactors reducing its survival are not changedSpecial Concern: A species that may become threatened orendangered because of a combination of factors
    3. 3. SPECIES AT RISKExtinct: A species that no longer existsSPECIES AT RISKGreat auk Passenger pigeon Sea mink
    4. 4. SPECIES AT RISKExtirpated: A species that no longer exists in aspecific areaPaddlefish Atlantic walrus
    5. 5. SPECIES AT RISKEndangered: A species facing imminent extirpationor extinctionBarn owl Swift fox Northern cricket frog
    6. 6. SPECIES AT RISKThreatened: A species that is likely to becomeendangered if factors reducing its survival are notchangedHumpback whale Wood bison
    7. 7. SPECIES AT RISKSpecial Concern: A species that may becomethreatened or endangered because of a combinationof factorsPolar bear Atlantic cod
    8. 8. SPECIES AT RISKWHY?!-Over-hunting (including over-fishing)-Disease-Change of climate and environment (includingpollution)-Habitat loss-Introduction of non-native species
    9. 9. SPECIES AT RISKHabitat lossHuman activity Impacts on ecosystemReplacing naturalvegetation alongcoastlines andwaterfrontsHabitat destruction, shoreline erosion, loss of somespecies, loss of breeding areasDredging to createdeeper water forboatsDisruption of bottom-living organisms and spawningbeds, habitat distructionSediment runofffrom land-clearing,agricultural, andforestry operationsSediments may smother natural habitatsCommercial fishing Bottom trawlers and drag lines injure and kill bottom-dwelling organisms, damage to abiotic features
    10. 10. SPECIES AT RISKIntroduction of non-native speciesNot all non-native species are harmful, but thosethat are would be considered “invasive species”INVASIVE species: Anon-native specieswhose intentional oraccidental introductionnegatively impacts thenatural environment
    11. 11. SPECIES AT RISKINVASIVE species: A non-native species whoseintentional or accidental introduction negativelyimpacts the natural environmentThe brown tree snakewas introduced to thePacific island of Guamas an accidentalintroduction around1950.Caused the extinctionof 9 of Guam’s 12forest birds and halfof the lizard species
    12. 12. SPECIES AT RISKType of Impact ConsequencesEcological -Invasive species compete with or feed on native species,leading to population decline or extinction.-Invasive species change ecosystem dynamics by alteringnutrient cucles or energy flowEconomic -Damage to forests and agricultural crops causes financiallosses-Competition with invasive plants lowers crop yields-Diseases and pests may destroy livestock and crops, killtrees, and harm important species such as honeybeesTourism -Species loss and reduced water quality have negativeimpacts on wildlife viewing, fishing, and water-basedrecreation-Waterways become choked with invasive aquatic plants,rendering them impassable to boatsHealth -Disease-causing organisms, such as West-Nile Virus-Pesticides used to control invasive species cause pollutionand are health risks
    13. 13. SPECIES AT RISKControlling introduced species…Chemical Control (pesticides)Mechanical Control (physical barriers or removal by burning,hunting, trapping, or hand-removal)Biological Control (intentional introduction of organisms tocontrol invasive species)Leaf-eating beetleshelp controlpurple loosetrife
    14. 14. SPECIES AT RISKPOLLUTION: Acid precipitation
    15. 15. SPECIES AT RISKPOLLUTION: Acid precipitation
    16. 16. SPECIES AT RISKPOLLUTION: Oil spills
    17. 17. SPECIES AT RISKPOLLUTION: Litter
    18. 18. SPECIES AT RISKPOLLUTION: Litter
    19. 19. SPECIES AT RISKHow do we know that a species is at risk?Ecologists count the number of animals of a particular species overmany years time and plot population graphs.Population graphs tell scientists if a particular species is in decline.
    20. 20. SPECIES AT RISKPopulation can also indicate predator-prey relationships.
    21. 21. SPECIES AT RISKWhat happens to the moose population when the wolf populationdeclined?The moose population increases when the wolf population decreases.

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