 |
|
|
 |
The Global Invasive Species Team |  |
|
||
|
|
|
Introduction First slide Slide #5 Slide #10 Slide #15 Slide #20 Slide #25 Slide #30 Slide #35 Slide #40 Slide #45 Slide #50 Slide #55 Slide #60 Slide #65 Slide #70 Last slide |
|
|||
 |
Invasive plants may also hybridize with closely related natives and in some cases hybridization may be so common and hybrid individuals so successful that the native may be eliminated as a distinct entity. Atlantic saltmarsh cordgrass (Spartina alterniflora) was introduced to Pacific coast estuaries where it is now invasive. It hybridizes with Pacific saltmarsh cordgrass (Spartina foliosa), which is native to marshes around the San Francisco Bay and other Pacific estuaries. Ayres et al. (1999) sampled cordgrass populations in tidal creeks around San Francisco and in some areas of south San Francisco Bay found only hybrids or non-natives. It is feared that as populations continue to hybridize, the pure native type may be eliminated from large portions of the estuary. This figure is based on data from Ayres et al. (1999). Green = Spartina foliosa; Red = Spartina alterniflora; Yellow = hybrids | |||
| Slide 67 |
|
