Invasive Plants
Invasive Plants
An invasive species is an introduced species that has established itself and causes negative impacts to the native environment, the economy, and even human health. WARC science is used by resource managers to help mitigate and control these problematic species, including the invasive hydrilla.
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Sources of Recurring Outbreaks of Lythrum salicaria (Purple Loosestrife) Near the Mouth of the Mississippi River
USGS researchers are examining germination of Purple Loosestrife to determine if the seed bank can reestablish this invasive species in the Mississippi Delta.
Winter Climate Change and the Northward Range Expansion of Tropical Invasive Plants in the Southeastern United States
Using temperature, species occurrence, field-based freeze damage data, and regression analyses for 84 invasive species, researchers at WARC are quantifying the species-specific relationships between minimum temperature and plant presence.
The Nonindigenous Aquatic Species Alert Risk Mapper (ARM)
The Nonindigenous Aquatic Species (NAS) program has developed a new tool, the NAS Alert Risk Mapper (ARM), to characterize waterbodies in the conterminous U.S. and Hawaii at potential risk of invasion from a new nonindigenous species sighting.
The Nonindigenous Aquatic Species Flood and Storm Tracker (FaST)
Storm-related flooding can lead to the potential spread of nonindigenous (or non-native) aquatic species into waterways they have not been seen in before. The USGS Nonindigenous Aquatic Species program has developed an innovative mapping tool to help natural resource managers with post-storm nonindigenous aquatic species detection and assessment efforts.
Integrating Science and Management for Optimal Prevention and Control of Invasive Nymphoides in Florida
Two invasive species of floating hearts, Nymphoides cristata and N. indica, are actively managed in Florida. A rare native species, N. humboldtiana, has been found in Florida and verified by molecular methods; this species is nearly indistinguishable from N. indica.