Management options of invasive Elodea nuttallii and Elodea canadensis

Zehnsdorf, Andreas; Hussner, Andreas; Eismann, Frank; Rönicke, Helmut; Melzer, Arnulf

doi:10.1016/j.limno.2014.12.010

Cited by 88 publications

(72 citation statements)

References 77 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In order to assess the SAV classification accuracy for the other images (i.e., 2013, 2015, and 2016), we identified total 17 SAV stations used for validation (i.e., Station 1,5,6,9,15,18,27,34,36,38,41,42,43,45,48, 49 and 52) out of 52 observation points (Figure 1) based on the available data in Table 1 and the in situ survey (2016). We also used the SAV biomass maps available in the literature for the south basin of Lake Biwa, primarily for the SAV growth period (i.e., mainly September) in 2002, 2007, 2012, and 2014 [63,65].…”

Section: Sav Distribution Mapmentioning

confidence: 99%

A Satellite-Based Assessment of the Distribution and Biomass of Submerged Aquatic Vegetation in the Optically Shallow Basin of Lake Biwa

et al. 2017

View full text Add to dashboard Cite

Assessing the abundance of submerged aquatic vegetation (SAV), particularly in shallow lakes, is essential for effective lake management activities. In the present study we applied satellite remote sensing (a Landsat-8 image) in order to evaluate the SAV coverage area and its biomass for the peak growth period, which is mainly in September or October (2013October ( to 2016, in the eutrophic and shallow south basin of Lake Biwa. We developed and validated a satellite-based water transparency retrieval algorithm based on the linear regression approach (R 2 = 0.77) to determine the water clarity (2013)(2014)(2015)(2016), which was later used for SAV classification and biomass estimation. For SAV classification, we used Spectral Mixture Analysis (SMA), a Spectral Angle Mapper (SAM), and a binary decision tree, giving an overall classification accuracy of 86.5% and SAV classification accuracy of 76.5% (SAV kappa coefficient 0.74), based on in situ measurements. For biomass estimation, a new Spectral Decomposition Algorithm was developed. The satellite-derived biomass (R 2 = 0.79) for the SAV classified area gives an overall root-mean-square error (RMSE) of 0.26 kg dry weight (DW) m −2 . The mapped SAV coverage area was 20% and 40% in 2013 and 2016, respectively. Estimated SAV biomass for the mapped area shows an increase in recent years, with values of 3390 t (tons, dry weight) in 2013 as compared to 4550 t in 2016. The maximum biomass density (4.89 kg DW m −2 ) was obtained for a year with high water transparency (September 2014). With the change in water clarity, a slow change in SAV growth was noted from 2013 to 2016. The study shows that water clarity is important for the SAV detection and biomass estimation using satellite remote sensing in shallow eutrophic lakes. The present study also demonstrates the successful application of the developed satellite-based approach for SAV biomass estimation in the shallow eutrophic lake, which can be tested in other lakes.

show abstract

Section: Sav Distribution Mapmentioning

confidence: 99%

A Satellite-Based Assessment of the Distribution and Biomass of Submerged Aquatic Vegetation in the Optically Shallow Basin of Lake Biwa

et al. 2017

View full text Add to dashboard Cite

show abstract

“…With a share of 1.0 to 1.6 kg P/Mg of total solid (according to the results of previous investigations), E. nuttallii has a potential as a phosphorus pool, being suitable as a substrate for the extraction of P resources by means of regular harvesting and anaerobic digestion [14].…”

Section: Introductionmentioning

confidence: 57%

“…Furthermore, the decomposition of aquatic plants at the end of a growth period results in significant oxygen consumption and release of nutrients. This leads to an accumulation of fermentation end products in the metabolism of anaerobic bacteria which are toxic for many aquatic organisms [13,14]. Hence, their population in German waters needs to be reduced, e.g., by mechanical removal [14].…”

Section: Introductionmentioning

confidence: 99%

A potential phosphorous fertilizer for organic farming: recovery of phosphorous resources in the course of bioenergy production through anaerobic digestion of aquatic macrophytes

et al. 2018

Self Cite

View full text Add to dashboard Cite

Background: A major problem with farming systems is the deficiencies in phosphorus (P) due to fixation in soils, erosion and run-off, and exports of herbal and animal products. P resources for the compensation of these losses will sooner or later be depleted. For this reason, innovative ideas for phosphorus recycling are highly relevant. The P excess from farming systems mostly ends up in surface waters, leads to eutrophication, and promotes the growth of aquatic plants. Particularly invasive neophytes such as western waterweed (Elodea nuttallii) can rapidly generate high levels of biomass in waters with good nutrient supply and bind relevant amounts of phosphorus. Methods:In the renatured open-pit mine Goitzsche (Saxony-Anhalt, Germany), biomass from E. nuttallii was harvested (2005)(2006)(2007)(2008) and the biomass dry matter and the P concentration were determined. The phosphorus recovery potential from this plant biomass was calculated by extrapolation based on the phosphorus analyses and the area potentially populated by E. nuttallii. One analysis of E. nuttallii was conducted to evaluate the content of potentially toxic elements (PTEs).

show abstract

“…Most often, the aquatic macrophytes are mowed using mowing boats [2] and disposed of without further use. Due to this reason, costs for water operators arise.…”

Section: Introductionmentioning

confidence: 99%

Anaerobic digestion of mixed silage of waterweed biomass and wheat straw in a long-term semi-continuous biogas production process

et al. 2018

Self Cite

View full text Add to dashboard Cite

Background: As part of the maintenance of lakes and rivers, large quantities of aquatic biomass are produced every year. Neophytes, such as Elodea nuttallii, compete with native species and cause a disturbance to the ecosystem, which can manifest itself in the form of eutrophication. Aquatic macrophytes are not in competition with the production of food and animal feed and thus can be used in anaerobic digestion plants to replace a fraction of commonly used renewables such as maize or grass silage. Mixed silage of Elodea biomass with wheat straw was recently developed to allow for the conservation of mowed aquatic biomass. In this paper, the digestibility of this silage was tested in a long-term semi-continuous fermentation experiment with a duration of 212 days. Methods: A continous-stirred tank reactor with a working volume of 31 L was used for the semi-continuous fermentation experiment. The substrate Elodea-straw silage was supplied to the fermenter once a day. The samples of digestates were analyzed directly after sampling twice a week for total solids, volatile solids, VFA/TAC, NH 4 -N, acetate, propionate, butyrate, and water-solutle elements. The biogas composition was determined by means of gas chromatograph once a week.

show abstract

Management options of invasive Elodea nuttallii and Elodea canadensis

Cited by 88 publications

References 77 publications

A Satellite-Based Assessment of the Distribution and Biomass of Submerged Aquatic Vegetation in the Optically Shallow Basin of Lake Biwa

A Satellite-Based Assessment of the Distribution and Biomass of Submerged Aquatic Vegetation in the Optically Shallow Basin of Lake Biwa

A potential phosphorous fertilizer for organic farming: recovery of phosphorous resources in the course of bioenergy production through anaerobic digestion of aquatic macrophytes

Anaerobic digestion of mixed silage of waterweed biomass and wheat straw in a long-term semi-continuous biogas production process

Contact Info

Product

Resources

About