Term
| what is an exotic species? |
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Definition
| species from another continent or land mass (can be non native) |
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Term
| what is a non-native species? |
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Definition
| is a species living outside its native distributional range, which has arrived there by human activity, either deliberate or accidental. |
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Term
| what is an invasive species? |
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Definition
| specific where exotic/nonnative has an economically ecological damaging effect on the environment |
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Term
| what is the annual cost of invasive species in the us |
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Definition
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Term
| for aquatic invasives can it this problem be reversible? |
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Definition
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Term
| invaders are a ___ to biodiversity in lakes |
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Definition
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Term
| what are 5 common features of invasives |
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Definition
1. broad environmental tolerances
2. effective disperseal
3. hgih rate of population increase
4. unique ecological niche
5. predator resistance |
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Term
| how do invasives proliferate in a lake? |
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Definition
1. intro to lake
2. establishment
3. spread
4. inland dispersal |
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Term
| what are several emerging aquatic invaders in WI? |
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Definition
| rusty crayfish, zebra mussel, rainbow smelt, spiny water flea |
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Term
| what are 2 ways aquatic invaders were introduced in WI lakes |
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Definition
| by boaters and bait traps |
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Term
| rusty crayfish are native to where? |
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Definition
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Term
| species richness ___ with rusty crayfish |
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Definition
| decrease ie fewer macrophytes |
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Term
| where did the zebra mussel originate from |
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Definition
| the caspian sea lake st clair |
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Term
| how do the invasives discussed specifically survive successfully in their environments |
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Definition
rusty cray fish- capable of living in wide range
zebra mussel- high reproductive rate found in vulnerable systems |
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Term
| lakes with ___ secchi depth have more spiny water flease |
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Definition
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Term
| aquatic invaders are spreading ___ |
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Definition
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Term
| what are some management suggestions on invaders |
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Definition
ID problematic invaders
ID vulnerable ecosystems
focus prevention efforts on vulnerable ecosystems |
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Term
| what are some management suggestions for lakes already invaded |
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Definition
| erradicate, decrease abundance, adapt, halt further spread |
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Term
| what should be prioritized in terms of management toward invaders |
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Definition
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