Data Quality Policy

Ensuring Data Integrity

Accurate data is critical for effective invasive species management. Hydrilla.org's Data Quality Policy outlines how we source, verify, and present quantitative information, such as distribution maps, economic impact figures, and growth statistics.

Sourcing and Verification

We source our statistical and geographical data exclusively from recognized authorities:

• Distribution Data: Primary reliance on the USGS Nonindigenous Aquatic Species database and state-level environmental agencies.
• Economic Data: Sourced from university economic impact studies and government expenditure reports on invasive species management.
• Biological Metrics: Gathered from controlled academic studies published in peer-reviewed journals.

Timeliness of Data

Invasive species populations and management costs fluctuate over time. Where applicable, we cite the year the data was published. We strive to use the most recent comprehensive data available, though we may reference historical data to illustrate the timeline of the hydrilla invasion.

Handling Conflicting Information

In cases where scientific studies or agency reports present conflicting data (e.g., varying estimates on the longevity of hydrilla tubers), we present the range of accepted scientific estimates rather than selecting a single figure, ensuring our audience understands the variability inherent in ecological research.