Seasonal changes of mechanisms maintaining clear water in a shallow lake with abundant Chara vegetation

Blindow, Irmgard; Hargeby, Anders; Andersson, Gunnar

doi:10.1016/s0304-3770(01)00208-x

Cited by 177 publications

(127 citation statements)

References 25 publications

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“…Instead of the decrease in predation pressure from fish on zooplankton, top-down control could expand toward the base of the food web. In agreement with the situation in other shallow lakes (SCHEFFER, 1998;BLINDOW et al, 2002) in those years when fish stock was below 100 kg ha -1 , nutrient availability was not the main limiting factor for growth of phytoplankton. This assumption is supported by the weak correlation between TP -chlorophyll a (Fig.…”

Section: Discussionsupporting

confidence: 87%

Long Term Effect of Cyprinid Fishes on Phytoplankton and Zooplankton Communities in a Shallow Water Protection Reservoir

Mátyás¹,

Korponai²,

Tátrai

et al. 2004

International Review of Hydrobiology

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The effects of fish kill and different fish stocks on the phytoplankton and zooplankton dynamics were studied in a shallow hypertrophic reservoir system. When fish stock was below 100 kg ha -1 , nutrient availability was not the main limiting factor for growth of phytoplankton. Consequently top-down forces controlled phytoplankton. In the years with high fish stock (>100 kg ha -1 ) the bottom-up forces dominated as nutrient availability was the main limiting factor for growth of phytoplankton. We can conclude that significant water quality improvement can be achieved in the reservoir system by decreasing fish stock below 100 kg ha -1 . Although clear-water phase could be stabilised temporary by macrophytes, stabilisation of good water quality requires continuous regulation of fish community.

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Section: Discussionsupporting

confidence: 87%

Long Term Effect of Cyprinid Fishes on Phytoplankton and Zooplankton Communities in a Shallow Water Protection Reservoir

Mátyás¹,

Korponai²,

Tátrai

et al. 2004

International Review of Hydrobiology

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“…Moreover, macrophyte beds offer zooplankton a refuge from fish predation (Burks et al, 2002;Carpenter et al,1985). In turn, large herbivorous crustaceans feeding on microalgae can help maintain water clarity (Blindow et al, 2000(Blindow et al, , 2002, although this is not always the case (Compte et al, 2011). For this reason, we also studied the relationship between charophyte development and plankton community structure to determine whether these macrophytes, via controlling effects on the plankton, are involved with water transparency in a positive feedback process.…”

Section: Introductionmentioning

confidence: 99%

The role of charophytes in a Mediterranean pond created for restoration purposes

et al. 2015

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“…Konstanzer Online-Publikations-System (KOPS) URL: http://www.ub.uni-konstanz.de/kops/volltexte/2008/5011/ URN: http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-50112 The original publication is available at www.springerlink.com Several authors have independently suggested a possible involvement of allelopathy behind observed phytoplankton patterns in whole-lake studies of vegetated, shallow lakes (Mjelde & Faafeng, 1997;Blindow et al, 2002;Lombardo, 2005). However, none could provide any evidence in favour of or against allelopathy, and the debate on the role of allelopathy at ecosystem level remains open.…”

mentioning

confidence: 99%

Searching for allelopathic effects of submerged macrophytes on phytoplankton—state of the art and open questions

Gross

Hilt

Lombardo

et al. 2007

Shallow Lakes in a Changing World

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Allelopathy, here defined as biochemical interactions between aquatic primary producers, has always been intriguing as a process explaining the dominance of certain plant or algal species over others. Negative chemical interference has been invoked as one of the steering mechanisms behind mutual dominance of either submerged macrophytes or phytoplankton in shallow eutrophic lakes. Yet, despite much effort, convincing evidence for allelopathic interactions in situ is still missing. Also, laboratory approaches often lack reality. Inspired by a series of talks at the Shallow Lakes 2005 meeting in Dalfsen, the Netherlands, we argue that there is circumstantial but strong evidence that allelopathic interference between submerged macrophytes and phytoplankton may indeed exist in aquatic ecosystems despite the problems associated with research in this field. We first discuss experimental approaches combining laboratory and field studies, based on examples presented at this meeting. We then discuss the impact of nutrient status of both producing and target organism and biotic factors such as herbivory or pathogens that might affect allelopathy. Further topics are the potential seasonality of effects and the species-specificity of certain allelochemicals. We conclude with some thoughts why a final First publ. in: Hydrobiologia 584 (2007), pp. 77-88 proof for allelopathy in situ might remain difficult or even inaccessible in some cases, and why we nevertheless should not abandon this idea.

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Seasonal changes of mechanisms maintaining clear water in a shallow lake with abundant Chara vegetation

Cited by 177 publications

References 25 publications

Long Term Effect of Cyprinid Fishes on Phytoplankton and Zooplankton Communities in a Shallow Water Protection Reservoir

Long Term Effect of Cyprinid Fishes on Phytoplankton and Zooplankton Communities in a Shallow Water Protection Reservoir

The role of charophytes in a Mediterranean pond created for restoration purposes

Searching for allelopathic effects of submerged macrophytes on phytoplankton—state of the art and open questions

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