Study

Response of Elodea nuttallii (Planch.) H. St. John to manual harvesting in the north-east of France

  • Published source details Di Nino F., Thiébaut G. & Muller S. (2005) Response of Elodea nuttallii (Planch.) H. St. John to manual harvesting in the north-east of France. Hydrobiologia, 551, 147-157.

Summary

Action: Use cutting/mowing to control problematic plants

A controlled study in 2003 in a stream invaded by Nuttall’s waterweed Elodea nuttallii in northeast France (Di Nino et al. 2005) reported that harvested and unharvested plots supported similar cover of native aquatic macrophytes over one growing season. Statistical significance was not assessed. Immediately before intervention, all plots were dominated by Nuttall’s waterweed (20% cover; 5 g/m2 biomass) with no native submerged macrophytes. Over eight months after intervention began, harvested plots typically contained less Nuttall’s waterweed than unharvested plots. This was true in 14 of 16 comparisons of cover (for which harvested: 3–35%; unharvested: 20–90%) and 16 of 16 comparisons of biomass (harvested: <1–180 g/m2; unharvested: 10–822 g/m2 biomass). However, harvested plots had greater cover of native aquatic macrophyte taxa in only 6 of 32 comparisons (for which harvested: 2–5%; unharvested: 0–4%). Methods: The study used a 100-m-long section of an upland stream. Nuttall’s waterweed was “harvested” (presumably by cutting, but not clearly reported) from two 15-m-long sections, either once (February) or twice (February and May). A 36-m-long section upstream was left unharvested. Macrophytes were surveyed immediately before intervention (February) and monthly for eight months after (until October). Biomass measurements were of whole dried plants.

Output references
What Works 2021 cover

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, mammals, forests, peatland and control of freshwater invasive species. More are in progress.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read the latest volume: Volume 18

Go to the CE Journal

Discover more on our blog

Our blog contains the latest news and updates from the Conservation Evidence team, the Conservation Evidence Journal, and our global partners in evidence-based conservation.


Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape Programme Red List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Bern wood Supporting Conservation Leaders National Biodiversity Network Sustainability Dashboard Frog Life The international journey of Conservation - Oryx British trust for ornithology Cool Farm Alliance UNEP AWFA Butterfly Conservation People trust for endangered species Vincet Wildlife Trust