17. Insect Conservation

17. Insect Conservation - Lecture # 17 Insect Conservation...

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Lecture # 17 Insect Conservation Robbin Thorp, 18 Feb 2009
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Why Conserve Insects? • Ecosystem services • Nutrient recycling • Biological control • Largest diversity and biomass • Food chain position • Food for some humans • Medicine, industry, crafts, scientific research • Aesthetic value • Conservation “tools”
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Problems for Insect Conservation • Poor public image • Too poorly known, especially rare species • Identification and sampling problems – Taxonomic impediment – Determination of habitat changes difficult – Habitat needs difficult to define
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Approaches to Conservation with Insects as “Targets” • Single species • Habitat • Control of threatening processes
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Single Species Conservation • Important to: – Raise public awareness – Allow legal protection of species at risk • National Endangered Species Act (NESA) • But there are too many insect species – Needs of many species will be different – Expensive to protect all species at risk – Not enough known about most to know whether they are at risk or not.
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Monarch migration: A “Threatened phenomenon” (IUCN)
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Migratory Species have Special Conservation Needs • Monarch butterfly migration in fall • Not an endangered or rare species yet • Serves as a “ Flagship ” species for public awareness about threatened insects • Annual migration is considered a “Threatened Phenomenon” by IUCN
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California’s Endangered Insects • 21 species – 15 Butterflies/Moths 4 Beetles –1 F l y 1 Grasshopper • Over 1/3 of all US species under TESS
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This note was uploaded on 12/07/2009 for the course ECON 19993 taught by Professor Helms during the Spring '09 term at UC Davis.

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17. Insect Conservation - Lecture # 17 Insect Conservation...

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