Allelopathic potential of two invasive alien Ludwigia spp.

Dandelot, Sophie; Robles, Christine; Lévy, Nicolas; Cazaubon, Arlette; Verlaque, Régine

doi:10.1016/j.aquabot.2007.12.004

Cited by 72 publications

(69 citation statements)

References 20 publications

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“…It is native to South America and was introduced voluntarily in 1820 in south-eastern France for its ornamental quality (Dandelot et al, 2008). It has also colonized many countries in Europe (Dutartre et al, 2006;Hussner, 2009).…”

Section: Biological Materialsmentioning

confidence: 98%

Responses of two invasive macrophyte species to salt

2012

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International audienceAquatic ecosystems are particularly sensitive to the introduction of species due to human activities. Increasing salinity in freshwaters due to sea intrusion or to human activities (road salt, industry, etc.) is known to have a negative impact on aquatic organisms and could play a role in the dynamics of invaders. This study compares salt tolerance levels of two introduced aquatic plants Myriophyllum aquaticum (Velloso) Verdcourt and Ludwigia grandiflora (Michaux) Greuter and Burdet. Plants were collected in spring, summer and autumn 2010, and were exposed to a range of salt concentrations (1, 3 and 6 g/L). Plant growth was determined by measuring seven morphological traits and their photosynthetic activity. Increased salt levels induced a decline in growth and photosynthetic activity in L. grandiflora, while photosynthetic activity in M. aquaticum remained constant at all salt concentrations. The response of both species to salt varied according to the season. M. aquaticum allocated its energy to growth in autumn, whereas the growth of L. grandiflora remained constant whatever the season. Our results suggested that M. aquaticum stimulated root and leaf production at the end of summer, which conferred resistance to salt stress and allowed this species to become invasive by overcompensating for this stress. Conversely, L. grandiflora induced premature senescence and lost its leaves. In the context of worldwide salinisation of freshwaters, M. aquaticum could colonize brackish water and other water bodies, whereas L. grandiflora invasion could be limited

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Section: Biological Materialsmentioning

confidence: 98%

Responses of two invasive macrophyte species to salt

2012

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“…Hydrocotyle ranunculoides, Ludwigia grandiflora and Myriophyllum aquaticum have become well established and are recognized as noxious weeds in several neighboring countries (Pot 2002;Dandelot et al 2005Dandelot et al , 2008Gassmann et al 2006;Sheppard et al 2006;Thiébaut 2007;Hussner 2009). These aquatic invasive plant species appear in the floating/emergent growth form and because of their high relative growth rates (Hussner 2009) they can form dense floating mats.…”

Section: Introductionmentioning

confidence: 99%

Impact of three aquatic invasive species on native plants and macroinvertebrates in temperate ponds

et al. 2011

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Biological plant invasions pose a serious threat to native biodiversity and have received much attention, especially in terrestrial habitats. In freshwater ecosystems impacts of invasive plant species are less studied. We hypothesized an impact on organisms from the water column and from the sediment. We then assessed the impact of three aquatic invasive species on the plants and macroinvertebrates: Hydrocotyle ranunculoides, Ludwigia grandiflora and Myriophyllum aquaticum. Our research on 32 ponds in Belgium indicated that the reduction in the native plant species richness was a common pattern to invasion. However, the magnitude of impacts were species specific. A strong negative relationship to invasive species cover was found, with submerged vegetation the most vulnerable to the invasion. Invertebrate richness, diversity and abundance were measured in sediments of invaded and uninvaded ponds along a gradient of H. ranunculoides, L. grandiflora, and M. aquaticum species cover. We found a strong negative relationship between invasive species cover and invertebrate abundance, probably due to unsuitable conditions of the detritus for invertebrate colonization. Taxonomic compositions of aquatic invertebrate assemblages in invaded ponds differed from uninvaded ponds. Sensitive benthos, such as mayflies were completely absent in invaded ponds. The introduction of H. ranunculoides, L. grandiflora, and M. aquaticum in Belgian ponds has caused significant ecological alterations in the aquatic vegetation and the detritus community of ponds.

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“…At present, this plant has been detected in more than 62 countries, and it is considered the most important floating weed in tropical and subtropical regions (Groote et al 2003). The main issues caused by E. crassipes is that it blocks navigation pathways; decreases oxygen in water, causing fish species to die; and causes eutrophication in rivers and lakes (Dandelot et al 2008). This aquatic plant has the highest growing rate in the world, providing 0.26 tons of dried biomass per hectare in all seasons.…”

Section: Introductionmentioning

confidence: 99%

GC/MS Analysis of Some Extractives from Eichhornia crassipes

et al. 2015

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Eichhornia crassipes (water hyacinth) is an invasive weed that causes serious issues for rivers, lakes, and other reservoirs around the world, although it can be an excellent source for bioactive compounds such as phytosterols and some steroids found in many plants. In this study, water hyacinth samples from both Durango and Distrito Federal in Mexico were collected. Ascendant extracts (cyclohexane, hexane, acetone, and methanol) from their leaves, stems, and roots were analyzed. Using boron trifluoride (~10% [~1.3 M] in 1-butanol), all extracts were derivatized. Twenty-four derivatized samples were analyzed using a gas chromatography-mass spectrometry (GC/MS) method. Twenty carboxylic acids were found, as well as squalene, which was found in nine extract samples: four cyclohexane extracts, one hexane extract, three acetone extracts, and two methanol extracts. A compound not reported before, -stigmasterol, was identified on three hexane extracts, an acetone extract, and a methalonic extract. Spirostane in acetone root extract and cholestane in cyclohexane stem-leaf extract were also identified.

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Allelopathic potential of two invasive alien Ludwigia spp.

Cited by 72 publications

References 20 publications

Responses of two invasive macrophyte species to salt

Responses of two invasive macrophyte species to salt

Impact of three aquatic invasive species on native plants and macroinvertebrates in temperate ponds

GC/MS Analysis of Some Extractives from Eichhornia crassipes

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