Do macrophytes support harmful cyanobacteria? Interactions with a green alga reverse the inhibiting effects of macrophyte allelochemicals on Microcystis aeruginosa

Xu, Chunju; Eigemann, Falk; Hilt, Sabine

doi:10.1016/j.hal.2012.06.002

Cited by 64 publications

(35 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Although the presence of Elodea did not induce a large shift in phytoplankton community composition, some differences were observed between the treatments with real Elodea and without Elodea. As was shown by Chang et al (2012), allelochemicals from submerged macrophytes may influence the outcome of competition between species, even if both species are sensitive to allelochemicals. This may explain the shift in community composition, even though both communities remained equally sensitive to allelochemicals.…”

Section: Discussionmentioning

confidence: 86%

“…Allelopathic interactions are notoriously difficult to study because of the difficulty of separating allelopathic effects from other biological interactions (Harper, 1975;Gross et al, 2007). K€ orner & Nicklisch, 2002;Mulderij, Smolders & van Donk, 2006;Chang, Eigemann & Hilt, 2012), indicating that such compounds may actually be released in the surrounding water at concentrations that can affect phytoplankton productivity. First, crude extracts or purified compounds obtained from different submerged macrophytes have been shown to display algicidal activity (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Second, exudates or culture filtrates of submerged macrophytes have been shown to suppress phytoplankton growth rates (e.g. K€ orner & Nicklisch, 2002;Mulderij, Smolders & van Donk, 2006;Chang, Eigemann & Hilt, 2012), indicating that such compounds may actually be released in the surrounding water at concentrations that can affect phytoplankton productivity. Third, coexistence experiments between submerged macrophytes and phytoplankton and also field studies have reported inhibitory effects of submerged macrophytes on phytoplankton under conditions where alternative control mechanisms such as nutrient competition or zooplankton grazing could be excluded (Mjelde & Faafeng, 1997;van Donk & van de Bund, 2002;Vanderstukken et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Long‐term allelopathic control of phytoplankton by the submerged macrophyte Elodea nuttallii

et al. 2014

View full text Add to dashboard Cite

Summary It is well known that submerged macrophytes can suppress phytoplankton blooms in lakes and thus promote water quality and biodiversity. One of the possible mechanisms through which submerged macrophytes control phytoplankton is by producing allelochemicals that suppress phytoplankton growth rates. The in situ importance of allelopathy, however, is often questioned because it is assumed that phytoplankton communities can rapidly evolve resistance to allelochemicals. Here, we present the results of two mesocosm experiments in which we evaluated whether the submerged macrophyte Elodea nuttallii is capable of controlling phytoplankton biomass over periods of 4 to 8 weeks. Such a timescale is long relative to the generation time of phytoplankton and is therefore expected to allow the development of resistance through compositional shifts at both population and community levels. Although the mesocosms were inoculated with a diverse phytoplankton inoculum including species that had previously been exposed to Elodea, phytoplankton biomass remained consistently low during the course of the experiments in the treatments with Elodea. As zooplankton grazing and competition for nutrients and light by macrophytes were excluded in our experiments, this suggests that phytoplankton was controlled by allelopathy. Dialysis bag assays, performed at the end of each mesocosm experiment, showed that phytoplankton communities from mesocosms with Elodea were equally sensitive to exudates from Elodea than phytoplankton communities from mesocosms without Elodea. These results suggest that phytoplankton communities do not evolve resistance to allelochemicals from Elodea. This may allow Elodea to control phytoplankton in natural ecosystems over prolonged time periods through allelopathy.

show abstract

Section: Discussionmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Long‐term allelopathic control of phytoplankton by the submerged macrophyte Elodea nuttallii

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Hence, it remains to be seen whether field applications of plant extracts or allelochemicals can produce a window of clear water long enough for submerged and presumably allelopathic active macrophytes to establish. Furthermore, a recent study showed while M. aeruginosa was inhibited by macrophyte allelochemicals when growing in pure culture, interacting with a green alga completely reversed inhibition into enhancement (Chang et al 2012). This led the authors to conclude ''allelopathically-active macrophytes might thus support cyanobacteria rather than suppress them in situ'' (Chang et al 2012).…”

Section: Plant/tree Extractsmentioning

confidence: 99%

Evaluation of several end-of-pipe measures proposed to control cyanobacteria

2015

View full text Add to dashboard Cite

While reduction in nutrient loading is a prerequisite for mitigation of harmful cyanobacterial blooms in nutrient-enriched waters, in certain surface waters eutrophication control is not always feasible due to practical and economic constraints or might be effective only in the long run. Yet, the urgent need to control cyanobacteria in water for drinking, irrigation, aquaculture, industry and recreation has spurred the development of a plethora of alternative methods that claim to be fast acting. Here, we provide a critical overview of several of these end-of-pipe measures: effective microorganisms (EM Ò ), golden algae (Ochromonas), plant/tree extracts, ultrasound and artificial mixing of non-stratifying waters. Most of the end-of the pipe measures claim to provide sustainable control of harmful cyanobacterial blooms, while at best only targeting symptom relief rather than eutrophication relief. Support for ''effective'' microorganisms, golden algae, plant extracts, ultrasound and artificial mixing of non-stratifying waters to diminish eutrophication problems such that the resulting water quality meets societal and legislation demands is limited, and several proposed underlying mechanisms are doubtful. None of these curative measures seem the desired wide applicable solution to cyanobacterial nuisance; they should not be considered Columbus's egg. A critical evaluation of end-of pipe measures is crucial for water authorities in their choice for mitigating measures.

show abstract

“…обзор [60]), включая QS-эффект (quorum sensing), влияние на подвижность, экспрессию генов и устойчи-вость к антибиотикам; • между бактериями и микроводорослями [10,30,62,80], включая взаимодействия, приводящие к изменению плоидности водорослей [71]; • между разными микроводорослями [77], в том числе цианобактериями и зелёными [19]; • между диатомеями и микрозоопланктоном -динофлагеллятами [7,79], динофлагеллятами и цилиатами, что изменяет динамику их роста и соотношение видов [44]. Взаимодействие продуцентов и консументов изучено наиболее подробно.…”

Section: сигналинг в водных экосистемахunclassified

Современные Тенденции Развития Биологии Водных Экосистем

Likhoshvai

2017

mbj

View full text Add to dashboard Cite

Охарактеризованы новые направления океанологии, сформированные в последние несколько лет бла-годаря внедрению в практику современных методов получения и обработки данных. Это методы мас-сового секвенирования, «омики» и биоинформационные методы хранения и анализа данных. Выяв-ление биологически активных веществ в водной среде и результаты лабораторных экспериментов по-казывают, что существует молекулярное взаимодействие (сигналинг) как на уровне популяционных и межвидовых отношений между микроорганизмами, так и на уровне их трофических связей. «От мо-лекул к экосистеме» -так охарактеризовано актуальное направление биологии морских экосистем. Объединение и анализ огромных массивов данных, включая полученные с помощью космических съё-мок и «облачных» технологий, сформировали новое направление экоинформатики, которое примени-тельно к водным экосистемам позволяет приблизиться к пониманию их структурно-функциональной организации в целом.Ключевые слова: биология водных экосистем, «омики», большие данные, сигналинг

show abstract

Do macrophytes support harmful cyanobacteria? Interactions with a green alga reverse the inhibiting effects of macrophyte allelochemicals on Microcystis aeruginosa

Cited by 64 publications

References 59 publications

Long‐term allelopathic control of phytoplankton by the submerged macrophyte Elodea nuttallii

Long‐term allelopathic control of phytoplankton by the submerged macrophyte Elodea nuttallii

Evaluation of several end-of-pipe measures proposed to control cyanobacteria

Современные Тенденции Развития Биологии Водных Экосистем

Contact Info

Product

Resources

About