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Control of One Aquatic Weed Opens Door for Secondary Aquatic Invasive Species
Hartbeespoort Dam in South Africa has a new invasive aquatic weed to battle, Salvinia minima. The proliferation of common salvinia, just as water hyacinth came under biological control through the combined efforts is no coincidence.  

In areas that experience high levels of nutrient inflow (pollution), the control of one aquatic weed opens resources to other potentially invasive plant species creating a ‘secondary invasion event’. In the case of common salvinia, the ‘secondary invasion event’ is taking place just as resources such as light availability, space and nutrients, otherwise used by water hyacinth, have become available.

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Water Supplies Devastated by Drought - Wichita Falls Texas has been devastated by a three year drought and unless things change it is estimated they could run out of water within 2 years. Residents are cutting back on water usage, they have managed to reduce water usage by 1/3, but it still isn’t enough.

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