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Habitat Fragmentation
 

Habitat Fragmentation

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    Habitat Fragmentation Habitat Fragmentation Presentation Transcript

    • Wildlife - habitat Term: Habitat Fragmentation
    • Fragmentation
      • Habitats which were once continuous become divided into separate fragments.
      • The separate fragments tend to be very small islands isolated from each other by crop land, pasture, pavement, or even barren land.
      • Major habitat problem for wildlife in Fauquier County
    • Fragments
      • Population problems
      • No immigration or emigration
      • Reduced reproductive pool
      • Decreasing species diversity
      • Increased edge to core ratio
    • Edge
      • At the forest edge, wind and sun light result in dryer conditions than are found in the interior of the forest patch.
      • Forest edges are also more accessible to predators and parasites that may occur in adjacent fields or developed areas
      • Interior Species can only live in the core of a forest
    • Arrangement
      • Fragments
      • Corridors
    • Wildlife Corridors
      • Provide a covered route between fragmented habitats
      • Unknown effectiveness
      • Low tech best
    • Riparian Buffers improve habitat by:
      • Functioning as wildlife corridors
      • Provides cover for animals to move from one area to another.
    • Provide cover & edge habitat
      • Provides food, cover, & nesting sites
      Edge No edge
      • Trees & shrubs provide roosting sites for birds
      • Increased humidity provides habitat for amphibians, snakes, & turtles
    • Shade
      • Supplies cover and cool temperatures for fish and aquatic insects
    • Habitat Requirements of Wildlife
      • Food
      • Cover
      • Water
      • Space (Range)
      • Arrangement
    • Food
      • Quality & Quantity
      • Seasonality
        • Not just during hunting season
      • Supplementation
        • Plantings
        • Trees
    • Cover
        • From elements
        • From predators
        • Edge
    • Water
      • Flowing water
      • Standing water
      • Dew
      • Temperature
      • Sedimentation
    • Space or Range
      • Bears: 10 miles
      • Crayfish: 2 feet
      • Adaptations
        • Deer will live in a very small range
        • Bears ranges getting smaller
    • Niche & Habitat
      • Habitat
        • Place in nature
        • Where
        • Biological & physical resources
        • Flora & Fauna
        • Climate
        • Terrain
        • Applies to all species
      • Niche
        • Role in nature
        • What & how
        • Position in the foodweb
        • Physiological & behavioral adaptations
        • Unique to each species
    • Habitat & Niche work together
      • Biological Need:
        • Female ducks need to supply all fat, minerals & protein needed in egg w/in 24 hours
        • Niche:
          • Ducks usually eat seeds – lower protein, higher fat
          • During laying ducks eat invertebrates – high protein
        • Habitat:
          • Ducks seek shallow wetlands because they warm quickly in the spring & provide abundant invertebrates
    • Habitat Project
      • Select and describe an ecosystem from the guide
      • Describe the management activities needed to create or improve its wildlife habitat
      • Include a section on management of invasives
      • Supplement with management strategies for one other (non-avian) wildlife species.
      • Make a powerpoint to display your results.
      • Have a spokesperson present your management strategies to the class on Wed.
    • Habitats
      • Agricultural
      • Grasslands
      • Shrubland
      • Forest
      • Savanna
      • Wetland
      • Developed
      • No more than 2 people per group
    • Catfish
      • Feed fish at 3% of body weight
      • Table 4-2 in book, relates length to weight
      • 5” = 35.3 lbs/1000
      • We have 200, how much do they weigh?
      • What is 3% of that?
      • How much is that?