Term
| About how many species have been introduced within the last 100 years? |
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Definition
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Term
| plants introduced from other countries, non-native species |
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Definition
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Term
| Name 3 of the ways/reasons why plants have been introduced. |
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Definition
- accidental introductions
- crop plants
- ornamental purposes
- medicinal purposes
- immigration
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Term
| True or false. Most introduced plants remain in cultivation and do not spread. |
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Definition
| True. About 10% have "escaped cultivation" |
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Term
| exotic plants that have formed self-sustaining populations that coexist with native populations; 10% of "escaped plants" |
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Definition
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Term
| __% of weeds are naturalized, introduced plants |
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Definition
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Term
| __% of naturalized plants become invasive species. |
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Definition
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Term
| introduced species that disrupt an ecosystem by displacing native species |
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Definition
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Term
| Why are many invasive plants from Asia so successful? |
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Definition
| They come from a similar climate and have been removed from natural herbivores and pathogens |
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Term
| Name four examples of invasive plants. |
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Definition
- purple lustrife
- japanese knotweed
- common reed
- tree-of-heaven
- Japanese barberry
- multiflora rose
- garlic mustard
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Term
| What are the negative effects that invasive plants may cause? |
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Definition
- displacement of natives
- disruption of food web
- changing soil fertility
- introduction of pathogens and pests
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Term
| Name 3 characteristics of successful invaders. |
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Definition
- early sexual reproduction
- frequent sexual reproduction
- asexual reproduction capability
- high genetic variability-->greater adaptability
- lots of small, easily dispersed seeds
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