Key Features Of Early Seral Habitats For Wildlife
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Key Features of Early Seral Habitats for Wildlife
Joan HagarUSGS-FRESC
Matt Lee
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Matt Lee
Matt Lee
Matt Lee
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Following Natural Disturbance ...
• Structure– Legacy trees and
snags – Open (low tree
density)– Large wood
• Composition– Herbs and Grasses – Shrubs– Deciduous
hardwoods
Bob Altman
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Species associated with closed canopy forest also use early seral habitats…
IF appropriate habitat elements are available
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Species that specialize on conifers
Red Tree Vole
Hemlock Looper
Red Crossbill
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Many conifer forest associates rely on diversity of plants
Spruce Grouse
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Elements of Quality Early Seral Habitat
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Residual trees and
snags
Matt Lee
D. Vesely
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Cavity-nesters in burned forests
•Fire-killed snags are important resource for foraging and nesting
•Many species respond negatively to salvage logging
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Bob Altman
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D. Vesely
Early Seral Habitat for Reptiles
•Basking•Prey
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Dead Wood as Refugia
D. Vesely
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Plant Diversity = Food Resources• Foliage• Nectar• Fruits• Seeds
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Plant Diversity: foundation of
food webs
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Matt Lee
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Arthropods
• Insect diversity correlated with plant diversity
• Deciduous species support more insects
• Influence of deciduous litter on soil food webs?
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Peter LaTourrette
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Importance of Early Seral Broadleaf Communities to Avian
Biodiversity
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1968 1972 1976 1980 1984 1988 1992 1996 2000 2004
30 Year Trend for Swainson’s Thrush from Tillamook S.F. BBS Route
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Creating Early Seral Habitat?
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Effects of Conifer-centric Forest Management on Early Seral
Habitat• Fewer residual structures
• Altered vegetation composition– Alters patterns of food
abundance
– Reduces diversity of food resources
– Alters food webs
• Reduced temporal span
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Consequences of reduced temporal span of early seral
habitats• Limit on shrub size
and age
• Shortens duration of shrubby habitat
• Reduced persistence of shrubs into mid-aged forests
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Restoration of Late Seral Forest
• Emphasizes large trees
• Size limit on harvest area on federal lands
• What will understory look like?
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Keep all the pieces
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