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37 Cards in this Set
- Front
- Back
Benefits of insect pollination for plants.
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Insects increase pollination efficiency.
Not dependent on the wind. If the plant is rare, allows for increased diversity. |
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What are the major pollinator orders?
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Hymenoptera, lepidoptera, diptera, coleoptera.
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Pollinator Syndrome
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From a plant's shape, size, smell, ect. you can tell what pollinates it.
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Cantharophily
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Beetle pollinated. Flowers white and dull. Bowl shaped with a strong smell.
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Myophily
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Feed on nectar and pollen. Diptera. Now showy. Strong corpse-like smell.
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Psychophily + Phalaenphily
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Colorful flowers which are closed at night = psycho.
Light colored flowers open at night = phalaen. |
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Melittophily
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Blue and yellow. Nectar guide in UV. Shows bees where to land.
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Spherophily
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Fig wasps. 1 species pollinates one species. Obligate pollination
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Myrmecophily
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Ants.
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When do insects and plants sometimes have a mutualistic relationship?
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Fig/fig wasp. Obligate pollinators who each serve each other.
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Colony collapse disorder.
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Honey bee rapid disappearance. Farmers had 1/3 bees disappear in 2006. Vanished. 40% assumed dead.
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Colony collapse theories.
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We passed some environmental threshold and neonictinoids.
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Neonictinoids?
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Pesticides build into seeds. Banned in France. Could have caused colony collapse because there were no long term studies.
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Myrmecophory
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Seed dispersal by ants.
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Elaisomes
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Special attractants for ants to pick up seeds.
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Ant/plant domatia
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Plant acts as a house for the ants. Stems, thorns, and tabers with a house for the ants and food. In return, ants attack other invaders and keep the plant healthy.
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What percent of insects are predators or parasites?
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25%
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Types of predation
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1. Sit and wait
2. Active forager 3. Phoresy |
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Sit and wait
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1. Cryptic
2. Agressive, foraging, mimicry. 3. Ambush. 4. Trap. 5. Reduced metabolism. |
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Active forager
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1. Random.
2. Non-random. Use vision, chemicals, CO2. Ex. siimullidae - black fly is attracted only to specific animal sweat. |
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Phoresy
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Individual transported to a larger individual of another species.
Ex. hippobossid flies - lice. Ex. Human bot flies. Lay eggs on mosquitoes and catch a ride to humans. |
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Predator adaptations
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Spines on legs, piercing/sucking, elongated mandible.
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Parasitoid orders.
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Diptera and hymenoptera.
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How do parasitoids work?
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Trigger immune response by laying eggs into/onto host.
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How do parasitoids succeed?
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1. Avoidance.
2. Molecular mimicry. 3. Destruction. 4. Suppression - hemocyte. 5. Subversion - develop despite host response. |
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Do parasitoids generally target one species or many?
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Generally monoxenous (only targeting one) but some are oligoxenous (target a few).
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Entomophagas
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An insect which attacks and eats other insects.
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Multiparasitism
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Host gets parasitized by multiple insects.
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Superparasitism
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Parasitoid pulls out other's eggs to clear room for their own.
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Hyperparasitism
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Second parasite's larvae eat eggs of 1st parasitoid.
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How do some parasitoids hijack hosts?
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Lay eggs onto the young host. Regulate the host's metabolism so it can't develop too fast.
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Vertebrates
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Insects can be very host specific in vertebrates too. Ex. fleas.
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Eusociality
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True social insects. Must have caste system and cooperation with rearing of young. Multiple generations.
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Examples of eusociality
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Bees and ants.
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Haplodiploidy
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Female - fertilized eggs (2n).
Males - unfertilized eggs (n). |
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Altruism
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Selflessness. Does it exist in the real world?
In insects it does not. Bees will sting and kill themselves to protect queen but this is mostly to protect their gene-pool. |
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Examples of interactions that are not eusocial
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aggregation, parental care without nesting, parental care with nesting, and parental care in communal nests.
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