Influence of environmental conditions on the regenerative capacity and the survivability of Elodea nuttallii fragments

Hoffmann, Markus; Raeder, Uta; Melzer, Arnulf

doi:10.4081/jlimnol.2014.952

Cited by 8 publications

(12 citation statements)

References 32 publications

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“…Although small sized propagules can result in enhanced species spread, larger fragments will likely retain a greater capacity for survival (Hoffmann et al 2014;Kuntz et al 2014;Li et al 2015;Redekop et al 2016). Here, we examined relatively large fragmentary propagules given that larger fragments are likely to have a greater capacity for growth resumption (Jiang et al 2009) and mitigate lateral growth reductions driven by apical dominance (Cline 1991).…”

Section: Discussionmentioning

confidence: 99%

Full steam ahead: direct steam exposure to inhibit spread of invasive aquatic macrophytes

et al. 2018

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Biosecurity protocols designed to prevent invader spread have become integral to invasive species management strategies. However, application of many proposed spread-prevention practices is inhibited due to low practicality, high expense, undesirable non-target effects and a lack of known efficacy. Here, we examine the use of direct steam exposure to induce substantial fragment (i.e. propagule stage) degradation of seven invasive macrophytes: Ceratophyllum demersum, Crassula helmsii, Egeria densa, Elodea canadensis, Elodea nuttallii, Lagarosiphon major and Potamogeton crispus. Each species was independently exposed to steam treatments in loose clumps of three fragments, steamed at a distance of 2-3 cm from the source, for varied exposure times: 10 s, 30 s, 1 min, 2 min, and 5 min. Furthermore, we develop and apply a novel degradation scale describing visual tissue biodegradation stages and/or resumption of growth for fragmentary propagules. Steam treatments were observed to be highly efficacious, with total degradation being induced by 10 s of direct steam exposure. This was apparent for all species following a seven day recovery period, except C. demersum, which took until 21 days. Conversely, control specimens displayed excellent survival and/or viability (i.e. resumption of growth). Therefore, we argue that this innovative, yet simple technique can be used to improve biosecurity practices to inhibit the spread of invasive macrophytes.

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Section: Discussionmentioning

confidence: 99%

Full steam ahead: direct steam exposure to inhibit spread of invasive aquatic macrophytes

et al. 2018

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“…[11][12][13]). Significant removal of nutrients from the body of water also occurs as a result of the harvesting of aquatic plants [14].…”

Section: Resultsmentioning

confidence: 99%

The study of the variability of biomass from plants of the Elodea genus from a river in Germany over a period of two hydrological years for investigating their suitability for biogas production

et al. 2017

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Background: Aquatic plants are an important component of aquatic ecosystems. They are valuable for the oxygen and carbon dioxide household and generate habitats especially for small fish and other small organisms. However, problems for the maintenance of water bodies can result from mass occurrences of these plants. Invasive neophytes -such as members of the Elodea genus -are particularly problematic in this regard. Aquatic plants need to be harvested regularly to ensure that water bodies remain usable and to safeguard flood protection for flowing water bodies. Energy can be produced from the harvested material by anaerobic digestion in biogas plants. Therefore, it is beneficial to know the best time for harvesting in this context. Methods: To identify the best time for harvesting, samples of the Elodea stock in the river Parthe in LeipzigSchönefeld were taken each week over the course of the two hydrological years 2015 and 2016. The composition of these samples was analyzed in the laboratory. In the second hydrological year, three samples from surface areas of 1 m 2 were also harvested once each month in order to determine the biomass yield per unit area.

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“…than smaller ones, due to their higher energy reserves and photosynthetic rates (Riis et al 2009;Kuntz et al 2014;Li et al 2015). In an examination of E. nuttallii fragment survival that included the apical tip, Hoffmann et al (2015) observed the percentage mortality of fragments to decrease with a higher numbers of initial nodes. However, even relatively small vegetative fragments, such as one frond, or a single node stem fragment can retain substantial regeneration capacities (Kuntz et al 2014;Heidbüchel et al 2016).…”

Section: Differential Desiccation Resistance Between Floating and Submentioning

confidence: 98%

Parched plants: survival and viability of invasive aquatic macrophytes following exposure to various desiccation regimes

et al. 2018

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Influence of environmental conditions on the regenerative capacity and the survivability of Elodea nuttallii fragments

Cited by 8 publications

References 32 publications

Full steam ahead: direct steam exposure to inhibit spread of invasive aquatic macrophytes

Full steam ahead: direct steam exposure to inhibit spread of invasive aquatic macrophytes

The study of the variability of biomass from plants of the Elodea genus from a river in Germany over a period of two hydrological years for investigating their suitability for biogas production

Parched plants: survival and viability of invasive aquatic macrophytes following exposure to various desiccation regimes

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