Fish predation on Eurasian watermilfoil (Myriophyllum spicatum) herbivores and indirect effects on macrophytes

2006 ◽  
Vol 63 (5) ◽  
pp. 1049-1057 ◽  
Author(s):  
Darren M Ward ◽  
Raymond M Newman
Keyword(s):  
Aquatic Plant ◽  
Field Experiments ◽  
Field Survey ◽  
Myriophyllum Spicatum ◽  
Fish Predation ◽  
Insect Herbivores ◽  
Eurasian Watermilfoil ◽  
Euhrychiopsis Lecontei ◽  
Herbivore Density ◽  
Invasive Aquatic Plant

We assessed the effect of fish predation on native and naturalized insect herbivores of the invasive aquatic plant Eurasian watermilfoil (Myriophyllum spicatum) using manipulative field experiments within lakes and a field survey across lakes. For the field experiments, we manipulated sunfish (Lepomis spp.) density in cages in the littoral plant beds of two contrasting lakes: one with many sunfish, few watermilfoil herbivores, and abundant Eurasian watermilfoil; and one with few sunfish, many herbivores, and little Eurasian watermilfoil. Watermilfoil herbivores, including the milfoil weevil (Euhrychiopsis lecontei) and aquatic caterpillars, were suppressed by fish in both experiments. Herbivore density was also negatively related to sunfish abundance in the multiple-lake survey. We conclude that abundant sunfish can strongly suppress watermilfoil herbivores. Furthermore, in one of our experiments there was a marginally significant effect of fish exclosure on watermilfoil, suggesting that fish suppression of watermilfoil herbivores can have a positive, indirect effect on plant growth. Fish predation on macrophyte herbivores may be an important trophic interaction in freshwater lakes.

Absorption and Translocation of Florpyrauxifen-benzyl in Ten Aquatic Plant Species

Weed Science ◽  
2021 ◽  
pp. 1-21
Author(s):  
Erika J. Haug ◽  
Khalied A. Ahmed ◽  
Travis W. Gannon ◽  
Rob J. Richardson
Keyword(s):  
North Carolina ◽  
Plant Species ◽  
Aquatic Plant ◽  
Myriophyllum Spicatum ◽  
Hydrilla Verticillata ◽  
State University ◽  
North Carolina State University ◽  
Eurasian Watermilfoil ◽  
Body Of Knowledge ◽  
Aquatic Herbicide

Abstract Additional active ingredients are needed for use in aquatic systems in order to respond to new threats or treatment scenarios, enhance selectivity, reduce use rates, and to mitigate the risk of herbicide-resistance. Florpyrauxifen-benzyl is a new synthetic auxin developed for use as an aquatic herbicide. A study was conducted at North Carolina State University, in which 10 µg L−1 of 25% radiolabeled florpyrauxifen-benzyl was applied to the isolated shoot tissue of ten different aquatic plant species in order to elucidate absorption and translocation patterns in these species. Extremely high levels of shoot absorption were observed for all species and uptake was rapid. Highest shoot absorptions were observed for crested floatingheart [Nymphoides cristata (Roxb.) Kuntze] (A192 =20 µg g−1), dioecious hydrilla [Hydrilla verticillata (L.f.) Royle] (A192 =25.3 µg g−1), variable watermilfoil (Myriophyllum heterophylum Michx.) (A192 =40.1 µg g−1) and Eurasian watermilfoil (Myriophyllum spicatum L.) (A192 =25.3 µg g−1). Evidence of translocation was observed in all rooted species tested with the greatest translocation observed in N. cristata (1.28 µg g-1 at 192 HAT). The results of this study add to the growing body of knowledge surrounding the behavior of this newly registered herbicide within aquatic plants.

Species Selectivity of Granular 2,4-D Herbicide When Used to Control Eurasian Watermilfoil (Myriophyllum spicatum) in Wisconsin Lakes

2011 ◽  
Vol 4 (2) ◽  
pp. 251-259 ◽  
Author(s):  
Chad Cason ◽  
Brad A. Roost
Keyword(s):  
Aquatic Plant ◽  
Survey Methods ◽  
Myriophyllum Spicatum ◽  
Application Rate ◽  
Line Transect ◽  
Data Sets ◽  
Native Plant ◽  
Eurasian Watermilfoil ◽  
Application Rates ◽  
Myriophyllum Sibiricum

AbstractA total of 24 pre-and posttreatment plant frequency data sets were analyzed from 15 Wisconsin lakes treated with granular 2,4-D BEE herbicide for the control of Eurasian watermilfoil (Myriophyllum spicatum). Six data sets from four untreated control lakes were analyzed for comparison. The data sets included the results of line-transect aquatic plant surveys and point-intercept aquatic plant surveys. The results from these two survey methods were analyzed separately. Analysis of pre-and posttreatment changes in frequency of occurence for 46 species of aquatic plants indicated Eurasian watermilfoil was the only species to show significant declines in all the surveys. At application rates of 112 kg ha−1, Eurasian watermilfoil declined an average 65.9% among the line-transect surveys; and 58.0% among the point-intercept surveys. At application rates of 168 kg ha−1, Eurasian watermilfoil declined by 94.4% and 76.5% among line-transect and point-intercept surveys, respectively. Among the control lakes, Eurasian watermilfoil increased an average of 77% in year 1 and 24% in year 2. Northern watermilfoil (Myriophyllum sibiricum), a closely related native plant, underwent declines in frequency at the higher 2,4-D application rate (20.0%) but showed an increase (88.9%) at the lower rate among the line-transect surveys. Northern watermilfoil exhibited declines at both rates among the point-intercept surveys (48 and 50%, respectively); however, the plant also exhibited declines in the control lakes in year 2. Most other native aquatic plant species were unaffected or showed increases following treatment with 2,4-D BEE. The high degree of selectivity to Eurasian watermilfoil found in this survey of operational treatments with 2,4-D BEE suggests that this herbicide is an important tool for restoring plant communities that have been degraded by Eurasian watermilfoil.

scholarly journals Photosynthesis in Eurasian Watermilfoil (Myriophyllum spicatum L.)

1972 ◽  
Vol 50 (1) ◽  
pp. 149-151 ◽  
Author(s):  
R. A. Stanley ◽  
A. W. Naylor
Keyword(s):  
Myriophyllum Spicatum ◽  
Eurasian Watermilfoil ◽  
Myriophyllum Spicatum L

scholarly journals Genotypes of the aquatic plant Myriophyllum spicatum with different growth strategies show contrasting sensitivities to copper contamination

Chemosphere ◽  
2020 ◽  
Vol 245 ◽  
pp. 125552 ◽  
Author(s):  
Eva Roubeau Dumont ◽  
Camille Larue ◽  
Hiram Castillo Michel ◽  
Hervé Gryta ◽  
Clarisse Liné ◽  
...  
Keyword(s):  
Aquatic Plant ◽  
Myriophyllum Spicatum ◽  
Growth Strategies ◽  
Copper Contamination

scholarly journals Detection of an invasive aquatic plant in natural water bodies using environmental DNA

PLoS ONE ◽  
2019 ◽  
Vol 14 (7) ◽  
pp. e0219700 ◽  
Author(s):  
Marc B. Anglès d’Auriac ◽  
David A. Strand ◽  
Marit Mjelde ◽  
Benoit O. L. Demars ◽  
Jens Thaulow
Keyword(s):  
Natural Water ◽  
Aquatic Plant ◽  
Environmental Dna ◽  
Water Bodies ◽  
Invasive Aquatic Plant ◽  
Natural Water Bodies

Terrestrial deposition of aquatic insects increases plant quality for insect herbivores and herbivore density

2014 ◽  
Vol 39 (4) ◽  
pp. 419-426 ◽  
Author(s):  
HILARY BULTMAN ◽  
DAVID HOEKMAN ◽  
JAMIN DREYER ◽  
CLAUDIO GRATTON
Keyword(s):  
Aquatic Insects ◽  
Plant Quality ◽  
Insect Herbivores ◽  
Herbivore Density
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