scholarly journals Influence of niche similarity on hybridization between Myriophyllum sibiricum and M. spicatum

2015 ◽  
Vol 28 (8) ◽  
pp. 1465-1475 ◽  
Author(s):  
Z. Wu ◽  
Z. Ding ◽  
D. Yu ◽  
X. Xu
Keyword(s):  
Myriophyllum Sibiricum

scholarly journals Changes due to invasion of Myriophyllum sibiricum in a shallow lake in Åland, SW Finland

2008 ◽  
Vol 3 (1) ◽  
pp. 10-13 ◽  
Author(s):  
Tore Lindholm ◽  
Eeva Rönnholm ◽  
Kerstin Häggqvist
Keyword(s):  
Shallow Lake ◽  
Myriophyllum Sibiricum

Genetic diversity and differentiation in populations of invasive Eurasian (Myriophyllum spicatum) and hybrid (Myriophyllum spicatum × Myriophyllum sibiricum) watermilfoil

2020 ◽  
Vol 13 (2) ◽  
pp. 59-67
Author(s):  
Ryan A. Thum ◽  
Gregory M. Chorak ◽  
Raymond M. Newman ◽  
Jasmine A. Eltawely ◽  
Jo Latimore ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Genetic Variation ◽  
Population Genetic ◽  
Myriophyllum Spicatum ◽  
Population Variation ◽  
Efficacy Evaluation ◽  
Submerged Aquatic Plant ◽  
Myriophyllum Sibiricum ◽  
Control Response ◽  
Herbicide Response

AbstractPopulation genetic studies of within- and among-population genetic variability are still lacking for managed submerged aquatic plant species, and such studies could provide important information for managers. For example, the extent of within-population genetic variation may influence the potential for managed populations to locally adapt to environmental conditions and control tactics. Similarly, among-population variation may influence whether specific control tactics work equally effectively in different locations. In the case of invasive Eurasian watermilfoil (Myriophyllum spicatum L.), including interspecific hybrids with native northern watermilfoil (Myriophyllum sibiricum Kom.), managers recognize that there is genetic variation for growth and herbicide response. However, it is unclear how much overall genetic variation there is, and how it is structured within and among populations. Here, we studied patterns of within- and among-lake genetic variation in 41 lakes in Michigan and 62 lakes in Minnesota using microsatellite markers. We found that within-lake genetic diversity was generally low, and among-lake genetic diversity was relatively high. However, some lakes were genetically diverse, and some genotypes were shared across multiple lakes. For genetically diverse lakes, managers should explicitly recognize the potential for genotypes to differ in control response and should account for this in monitoring and efficacy evaluation and using pretreatment herbicide screens to predict efficacy. Similarly, managers should consider differences in genetic composition among lakes as a source of variation in the growth and herbicide response of lakes with similar control tactics. Finally, laboratory or field information on control efficacy from one lake may be applied to other lakes where genotypes are shared among lakes.

Effects of seven forestry management herbicides on Myriophyllum sibiricum, as compared with other nontarget aquatic organisms

1999 ◽  
Vol 29 (7) ◽  
pp. 1158-1169 ◽  
Author(s):  
Roxana D Roshon ◽  
Janet H McCann ◽  
Dean G Thompson ◽  
Gerald R Stephenson
Keyword(s):  
Root Growth ◽  
Aquatic Plants ◽  
Aquatic Organisms ◽  
High Sensitivity ◽  
Dry Mass ◽  
Sulfometuron Methyl ◽  
Metsulfuron Methyl ◽  
Myriophyllum Sibiricum ◽  
Floating Macrophytes ◽  
2,4 Dichlorophenoxyacetic Acid

Historically, studies on the nontarget aquatic effects of forest-use herbicides focused largely on fish and invertebrates despite the ecological importance of aquatic plants. Regulatory requirements and the aquatic phytotoxicity database need to be improved to reflect the importance of aquatic plants. Based on a review of the scientific literature and results from laboratory testing with the submersed macrophyte Myriophyllum sibiricum Komarov, the effects of 2,4 dichlorophenoxyacetic acid (2,4-D), glyphosate, hexazinone, imazapyr, metsulfuron methyl, sulfometuron methyl, and triclopyr on nontarget aquatic organisms were compared. Laboratory results indicate that M. sibiricum is sensitive to herbicide effects, especially those that impact root growth. For most herbicides, the inhibitory concentrations 25 and 50 (IC25 and IC50, concentrations that inhibit an endpoint parameter by 25 and 50%, respectively) for shoot and root growth were below the expected environmental concentrations (EEC). For example, the IC50 values for root dry mass were 0.000 12 and 0.000 22 mg active ingredient/L for sulfometuron methyl and metsulfuron methyl, respectively, concentrations that were approximately 3100 and 1700 times below the EEC for these compounds. Interspecies comparisons, conducted during this study, demonstrated that M. sibiricum was generally equally or more sensitive to these herbicides than other aquatic plant species (i.e., floating macrophytes and algae) and, in some cases, more sensitive than fish, zooplankton, and other invertebrates. For example, available data demonstrated that 2,4-D, imazapyr, and the sulfonylureas investigated were more toxic to rooted and floating macrophytes than to other aquatic organisms, including algae. Because of the high sensitivity and ecological significance of aquatic macrophytes, a greater emphasis should be placed on evaluating aquatic phytotoxicity in future ecotoxicological research.

Annotated checklist to the vascular plant flora of Tuktut Nogait National Park and the Melville Hills region (Canadian Low Arctic)

Phytotaxa ◽  
2013 ◽  
Vol 102 (1) ◽  
pp. 1 ◽  
Author(s):  
JEFFERY M. SAARELA ◽  
LYNN J. GILLESPIE ◽  
LAURIE L. CONSAUL ◽  
ROGER D. BULL
Keyword(s):  
Northwest Territories ◽  
National Park ◽  
Vascular Plant ◽  
Floristic Survey ◽  
Myriophyllum Sibiricum ◽  
Infraspecific Taxa ◽  
Plant Collections ◽  
Low Arctic ◽  
Conservation Concern ◽  
Annotated Checklist

 Tuktut Nogait National Park is located in the Melville Hills in the northeastern corner of mainland Northwest Territories in Canada's Southern Arctic Ecozone. The first major floristic survey of the Melville Hills region was conducted in 1990 as part of a natural resource inventory to determine its suitability as a National Park. We studied the flora and made extensive plant collections in Tuktut Nogait National Park and the Melville Hills region in 2009. Here, we present a comprehensive annotated checklist to the region's vascular plant flora based on a review of all existing and our own new collections. This includes the citation of all specimens examined, colour photographs for a subset of taxa and detailed taxonomic comments. The Melville Hills flora comprises 268 taxa (265 species and three additional infraspecific taxa), a 16% increase from the first survey, 215 of which are known from Tuktut Nogait National Park. Forty-eight taxa are newly recorded for the region and 54 taxa are newly recorded for Tuktut Nogait National Park. Noteworthy records include range extensions for Botrychium lunaria, Carex concinna, Draba borealis, Myriophyllum sibiricum, Plantago eriopoda, Poa alpina, Poa ammophila, Puccinellia banksiensis, Salix arbusculoides, and Selaginella selaginoides. The flora includes 19 vascular plant species of potential conservation concern in the Northwest Territories, including six assessed as "May Be At Risk", of which one occurs in the Park and 13 assessed as "Sensitive", of which eight occur in the Park.

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.

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