Seasonal growth and profile structure development of Elodea nuttallii (Planch.) St. John in pond Ojaga-Ike, Japan

Kunii, Hidenobu

doi:10.1016/0304-3770(84)90065-2

Cited by 55 publications

(33 citation statements)

References 4 publications

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“…Hamabata (1997) discovered that a mild winter with a minimum monthly temperature above 8 xC favoured the growth of overwintering plants of E. nuttallii from which new shoots are produced vegetatively in temperate regions. Shoot elongation of this Kohler and Janauer (1995) on a five-level descriptor scale (1 -very rare, 2 -rare, 3 -common, 4 -frequent, 5 -abundant, predominant species began in spring, when the water temperature exceeded about 10 xC (Kunii, 1984). In 2011, the water temperature of the Drava River reached 10 xC at the beginning of the April, earlier in the season than in 2010 (mid-April) and 2009 (beginning of May), so it was presumed that the growth season for macrophytes in the Drava River started earlier in 2011.…”

Section: Discussionmentioning

confidence: 99%

“…The biomass of E. nuttallii reached this year a maximum of more than 5000 g dry weight.m x2 , which is considerably beyond the figures reported by other researchers. Kunii (1984), Ozimek et al (1990) and Hamabata (1997) reported that the biomass of E. nuttallii varied from 500 to 800 g dry weight.m x2 in lakes. Hamabata (1997) also reported that, under favourable conditions, E. nuttallii tends to form dense pure stands that often reach a height of more than 2 m. In the Drava River, the length of E. nuttallii reached as much as 3 m by the end of the season in 2011.…”

Section: Discussionmentioning

confidence: 99%

“…Averages of water temperature, discharge and water level were calculated for each month from January to August for all 3 years. The start of the growing season for macrophytes was taken as the day when the water temperature reached 10 xC (Kunii, 1984). The number of days when water temperature was > 10 xC, from January 1 to the day of sampling (August 25), corresponds to the length of the vegetation period of macrophytes.…”

Section: Field Surveys and Laboratory Workmentioning

confidence: 99%

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Influence of abiotic factors on invasive behaviour of alien speciesElodea nuttalliiin the Drava River (Slovenia)

Grudnik

Jelenko

Germ

2013

Ann. Limnol. - Int. J. Lim.

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-The alien and potentially invasive species Elodea nuttallii was observed for the first time in Slovenia's Drava River in 2007, when its huge biomasses were observed at some locations. Changes in biomass of submerged macrophyte communities and abiotic factors such as water temperature, discharge and level were monitored at two impoundments of the Drava River (2009, 2010 and 2011). The correlations between abiotic factors and developed final biomass were assessed to determine if the level of abiotic factors has an impact on the final biomass and invasive behaviour of E. nuttallii. The results obtained showed that biomass of E. nuttallii was not excessive in 2009 and 2010, while in the year 2011 it developed huge biomass at locations, which were not directly exposed to the main water current. The biomass of Myriophyllum spicatum was also higher in 2011 in comparison with 2009 and 2010 but not in such high degree. The key factor for the development of the final biomass of E. nuttallii was the water temperatures in winter and spring and also the point at which water temperatures in spring surpassed 10 xC. The invasive behaviour of E. nuttallii is expected in the years with higher temperatures in January and March and at the locations which are not directly exposed to the main water current. We assume that continuation of the deposition of silt in the impoundments of the Drava River could contribute to invasive behaviour of species E. nuttallii in the years with mild winters and warmer springs.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Field Surveys and Laboratory Workmentioning

confidence: 99%

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Influence of abiotic factors on invasive behaviour of alien speciesElodea nuttalliiin the Drava River (Slovenia)

Grudnik

Jelenko

Germ

2013

Ann. Limnol. - Int. J. Lim.

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“…A management during autumn, on the other hand, reduces the amount of fragments during winter and therefore affects the spread of E. nuttallii plants during the next vegetation period. Due to the vegetative reproduction behaviour of E. nuttallii, a sufficient amount of E. nuttallii fragments has to survive the winter to enable the recolonisation of the lake (Casper and Krausch, 1980;Kunii, 1981;Kunii, 1984b). Therefore, a reduction of the fragments in the lakes before/during winter also affects the ability of E. nuttallii to recolonise the lake in the following year.…”

Section: Field Experimentsmentioning

confidence: 99%

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

Hoffmann¹,

Raeder²,

Melzer³

2014

J Limnol

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“…Next to nutrient effects, macrophytes generally also grow faster when temperature and light irradiance increase during the seasons (Kunii 1984;Barrat-Segretain 2004;Bornette and Puijalon 2011). The annual timing of strong macrophyte development often coincides with high anthropogenic use of aquatic ecosystems, as water recreation peaks during the summer months.…”

Section: Introductionmentioning

confidence: 99%

Classifying nuisance submerged vegetation depending on ecosystem services

Verhofstad

Bakker

2017

Limnology

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Throughout the world, mass development of native and non-native submerged macrophytes leads to nuisance problems for humans. However, often neither the type of nuisance nor the characteristics of nuisance vegetation have been uniformly quantified, leaving nuisance vegetation as a largely unsubstantiated qualification. The lack of a consensus about when submerged plants cause nuisance hampers comparative research on the environmental conditions leading to nuisance. Furthermore, defining and evaluating management goals to reduce nuisance caused by submerged plants are not possible when characteristics of the nuisance vegetation remain unquantified. In this study, we performed a literature review and gathered stakeholder information to identify (1) which problems are caused by nuisance submerged macrophytes, (2) which plant characteristics underlie 'nuisance' and (3) and which species cause nuisance. We (4) synthesised this information into a framework to classify submerged vegetation as either 'nuisance' or 'non-nuisance' using a case study to illustrate the principles. We found that most nuisance problems that affect human use of the ecosystem can be grouped into problems for boat traffic, swimming, fishing and hydrological functioning of the system. Additionally, a multitude of ecological effects have also been reported, but these were outside of the scope of this study. Vegetation cover and canopy depth below the water surface are the main determinant characters for nuisance. Therefore, both invasive and native eutrophilic species with a vertical growth strategy are particularly problematic, but other species can also cause nuisance.

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Seasonal growth and profile structure development of Elodea nuttallii (Planch.) St. John in pond Ojaga-Ike, Japan

Cited by 55 publications

References 4 publications

Influence of abiotic factors on invasive behaviour of alien speciesElodea nuttalliiin the Drava River (Slovenia)

Influence of abiotic factors on invasive behaviour of alien speciesElodea nuttalliiin the Drava River (Slovenia)

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

Classifying nuisance submerged vegetation depending on ecosystem services

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