Changes in biomass and spatial distribution of Elodea nuttallii (Planch.) St. John, an invasive submerged plant, in oligomesotrophic Lake Kizaki from 1999 to 2002

Nagasaka, Masao

doi:10.1007/s10201-004-0129-2

Cited by 26 publications

(29 citation statements)

References 39 publications

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“…At the present loading rate, biomass of the submerged vegetation (modeled according to Elodea characteristics) was negligible, but the model calculated a maximum biomass of 90 g m -2 at reduced loading levels in combination with a marsh surface area of 15% or higher. This maximum biomass is comparable to empirical results of the study of Nagasaka (2004), in which Elodea nuttallii biomass ranged between 20 and 150 g m -2 in a shallow littoral zone. Immediately after significant growth of the submerged vegetation, in the model chlorophyll-a levels dropped from 0.057 mg l -1 to 0.002 mg l -1 , due to a positive feedback loop of improved light conditions, improved plant growth, reduced nutrient levels, decreased algal biomass, improved light conditions and so on.…”

Section: Nutrient Retention Processessupporting

confidence: 86%

The Contribution of Marsh Zones to Water Quality in Dutch Shallow Lakes: A Modeling Study

Sollie

Janse

Mooij

et al. 2008

Environmental Management

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Many lakes have experienced a transition from a clear into a turbid state without macrophyte growth due to eutrophication. There are several measures by which nitrogen (N) and phosphorus (P) concentrations in the surface water can be reduced. We used the shallow lake model PCLake to evaluate the effects of three measures (reducing external nutrient loading, increasing relative marsh area, and increasing exchange rate between open water and marsh) on water quality improvement. Furthermore, the contribution of different retention processes was calculated. Settling and burial contributed more to nutrient retention than denitrification. The model runs for a typical shallow lake in The Netherlands showed that after increasing relative marsh area to 50%, total phosphorous (TP) concentration in the surface water was lower than the Maximum Admissible Risk (MAR, a Dutch government water quality standard) level, in contrast to total nitrogen (TN) concentration. The MAR levels could also be achieved by reducing N and P load. However, reduction of nutrient concentrations to MAR levels did not result in a clear lake state with submerged vegetation. Only a combination of a more drastic reduction of the present nutrient loading, in combination with a relatively large marsh cover (approximately 50%) would lead to such a clear state. We therefore concluded that littoral marsh areas can make a small but significant contribution to lake recovery.

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Section: Nutrient Retention Processessupporting

confidence: 86%

The Contribution of Marsh Zones to Water Quality in Dutch Shallow Lakes: A Modeling Study

Sollie

Janse

Mooij

et al. 2008

Environmental Management

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“…Reduced biomass increment observed in our experiment suggested the plant growth was inhibited. Noticeable declines of E. nuttallii populations in Japan (NAGASAKA 2004) and Elodea canadensis in Europe (SCULTHORPE 1967) were reported, and scientists have suggested different stress (biotic and abiotic) factors regarding this decline (HAMABATA 1991, KADONO et al 1997. Our results also supported by BRIX and SORRELL (1996), who reported that wetland plants grown in reducing treatments stopped growing, some of them losing mass.…”

Section: +2supporting

confidence: 84%

Assessment of macro-micro element accumulation capabilities of elodea nuttallii under gradient redox statuses with elevated nh4-n concentrations

Zaman

Asaeda

2014

Acta Botanica Croatica

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-Aquatic plants often encounter various redox conditions in their natural environment. Elodea nuttallii (Planch.), a submerged aquatic macrophyte, has a flexile ability to use different nutrient sources from various environments. In the present study, Elodea nuttallii was subjected to various redox conditions (+400 mV to -180 mV) at both normal (2.5 ppm) and high (10 ppm) ammonium concentrations and evaluated for macro and micro element accumulation. A reduced environment was prepared by adding glucose to growth medium and nitrogen gas bubbling, while an oxic environment was executed by atmospheric air bubbling. Plants in oxygen-deprived conditions manifested heavy metal (HM) toxicity, such as reduction of biomass and photosynthetic pigments, excess generation of reactive oxygen species (ROS), lipid peroxidation and reduction of major macro elements. In reduced treatments, the bioaccumulation sequence for micro elements was Cu>Mn>Zn>Al>Cd>Fe>Pb at both normal and high NH 4 -N concentrations. The combined effect of low redox state and high ammonium concentration had a strong physiological impact on the submerged macrophyte. However, macro-and micronutrient accumulation was more significantly affected by reduced environment than by a high NH 4 -N concentration.

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“…The results about littoral macrophytes are similar to the descriptions of mountain lakes; where the macrophytes are present contributing a high oxygen concentration (Nagasaka, 2004;Li et al, 2009). The high amount of species in Tinquilco Lake would be probably related to the transition from oligotrophy to mesotrophy observed in this lake (De los Ríos et al, 2007), these patterns are similar to other lakes of the same category, with changes in trophic status, where ultraoligotrophic lakes have a low amount of species and abundance (Nagasaka, 2004;Li et al, 2009).…”

Section: ___________________supporting

confidence: 80%

“…Nevertheless, an oligotrophy to mesotrophy transition has been observed in some lakes located mainly between 38 to 41°S, due to the replacing of the native forest of their basin by agricultural zones, towns and industries (Soto, 2002). One of the biotic components that can be an indicator of trophic status is the assemblage of macrophytes (Hauenstein et al, 2002;Nagasaka, 2004;Li et al, 2009). We define macrophytes according to Ramírez & Stegmeier (1982).…”

Section: ___________________mentioning

confidence: 99%

Macrophytes assemblages in mountain lakes of Huerquehue National Park (39ºS, Araucania Region, Chile)

Hauenstein¹,

Barriga²,

Ríos-Escalante³

2011

lajar

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ABSTRACT. The lakes studied (Tinquilco, Verde, Toro, Chico) are located in the Huerquehue National Park (39°08'S, 71°40'W), Chile. An inventory of the aquatic and riparian species was performed between December 2005 and March 2006. A null model analysis was done to determine the existence of regulatory factors of species associations, and the Jaccard index was applied to determine floristic similarities. Seventyfive species were identified. The greatest number (54) and highest percentage of introduced species (37%) occurred at Tinquilco Lake, placing it in the category of "high human disturbance". Verde Lake, on the other hand, presented the lowest number of species (21), and the percentage of introduced species did not exceed 20% in the other three lakes, which are considered to have "low human disturbance". The analysis of the null model revealed the presence of regulatory factors in one of the three simulations. However, in the other two simulations, the species associations appeared to be random, presumably because many species were repeated at the study sites. According to the Jaccard index, Tinquilco Lake is noticeably different from the other lakes, probably due to its transition from oligotrophy to mesotrophy. Keywords: oligotrophy, mesotrophy, macrophytes, null model, lakes, Patagonia, Chile. Ensambles de macrófitas en lagos de montaña del Parque Nacional Huerquehue(39°S, Región de la Araucanía, Chile) RESUMEN. Los lagos estudiados (Tinquilco, Verde, Toro, Chico) se localizan en el Parque Nacional Huerquehue (39°08'S, 71°40'W). Entre diciembre de 2005 y marzo de 2006, se inventarió su flora acuática y ribereña. Para determinar la influencia de factores reguladores en las asociaciones de especies se aplicó un análisis de modelo nulo y para determinar similitudes florísticas se aplicó el índice de Jaccard. Se identificaron 75 especies, donde el mayor número (54) y el mayor porcentaje de especies introducidas (37%) se registró en el lago Tinquilco, por lo que se incluye en la categoría de "altamente intervenido"; mientras que el menor número de especies se registró en el lago Verde con 21, y el porcentaje de especies introducidas no superó el 20% en los otros tres lagos, por lo cual se consideran como "poco intervenidos". Los análisis del modelo nulo muestran la presencia de factores reguladores en una de las tres simulaciones, mientras que en las dos restantes se sugiere una asociación aleatoria de las especies, supuestamente explicada por la presencia repetida en los sitios. El índice Jaccard reveló que el Tinquilco es notablemente diferente a los otros lagos, cuya probable causa se relacionaría con la transición de oligotrofía a mesotrofía.

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Changes in biomass and spatial distribution of Elodea nuttallii (Planch.) St. John, an invasive submerged plant, in oligomesotrophic Lake Kizaki from 1999 to 2002

Cited by 26 publications

References 39 publications

The Contribution of Marsh Zones to Water Quality in Dutch Shallow Lakes: A Modeling Study

The Contribution of Marsh Zones to Water Quality in Dutch Shallow Lakes: A Modeling Study

Assessment of macro-micro element accumulation capabilities of elodea nuttallii under gradient redox statuses with elevated nh4-n concentrations

Macrophytes assemblages in mountain lakes of Huerquehue National Park (39ºS, Araucania Region, Chile)

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