NDLI: Searching for allelopathic effects of submerged macrophytes on phytoplankton

Content Provider	Springer Nature Link
Author	Gross, Elisabeth M. Hilt nee Körner, Sabine Lombardo, Paola Mulderij, Gabi
Copyright Year	2007
Abstract	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 proof for allelopathy in situ might remain difficult or even inaccessible in some cases, and why we nevertheless should not abandon this idea.
Starting Page	77
Ending Page	88
Page Count	12
File Format	PDF
ISSN	00188158
Journal	Hydrobiologia
Volume Number	584
Issue Number	1
e-ISSN	15735117
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2007-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Allelochemical interaction Algicidal activity Chemical interference Culture filtrate Exudation Hydrobiology Ecology
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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