Tropical macrophytes promote phytoplankton community shifts in lake mesocosms: relevance for lake restoration in warm climates

Sim, DZH; Mowe, MAD; Song, Y; Lu, J; Tan, HTW; Mitrovic, SM; Roelke, DL; Yeo, DCJ

Tropical macrophytes promote phytoplankton community shifts in lake mesocosms: relevance for lake restoration in warm climates

Sim, DZH Mowe, MAD Song, Y Lu, J Tan, HTW Mitrovic, SM Roelke, DL Yeo, DCJ

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Publisher:: Springer Science and Business Media LLC
Publication Type:: Journal Article
Citation:: Hydrobiologia, 2021, 848, (20), pp. 4861-4884
Issue Date:: 2021-11-01

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Field	Value	Language
dc.contributor.author	Sim, DZH
dc.contributor.author	Mowe, MAD
dc.contributor.author	Song, Y
dc.contributor.author	Lu, J
dc.contributor.author	Tan, HTW
dc.contributor.author	Mitrovic, SM
dc.contributor.author	Roelke, DL
dc.contributor.author	Yeo, DCJ
dc.date.accessioned	2022-01-13T06:07:05Z
dc.date.available	2022-01-13T06:07:05Z
dc.date.issued	2021-11-01
dc.identifier.citation	Hydrobiologia, 2021, 848, (20), pp. 4861-4884
dc.identifier.issn	0018-8158
dc.identifier.issn	1573-5117
dc.identifier.uri	http://hdl.handle.net/10453/153066
dc.description.abstract	Macrophytes can be crucial for maintaining clear water conditions in temperate shallow lakes. However, their restorative potential and role in regulating phytoplankton remains uncertain in tropical lakes. We investigated the effects of emergent (Ludwigia adscendens and Persicaria barbata) and submerged (Vallisneria spiralis) macrophytes on the phytoplankton community of a turbid tropical reservoir. Through two in situ mesocosm experiments (~ 1000 l capacity) lasting 4 weeks, we (1) determined the effects of macrophyte density on phytoplankton biomass and composition, and (2) compared these effects between emergent and submerged macrophytes. In Experiment 1, macrophyte treatments reduced phytoplankton biomass and increased water clarity in a density-dependent manner. Only the ‘high density’ treatment (300 g/m2 emergent and 650 g/m2 submerged macrophytes) induced a taxonomic and functional shift from an initial community dominated by turbid water-adapted filamentous cyanobacteria to one dominated by clear water-adapted green algae and cryptophytes. In Experiment 2, emergent and submerged macrophytes reduced phytoplankton biomass and distinctly altered taxonomic and functional composition, with submerged macrophytes inhibiting Microcystis and stimulating cryptophyte taxa. Our results indicate that macrophytes can induce substantial phytoplankton community shifts in turbid tropical lakes, demonstrating the potential to assist in the reversal from turbid to clear water states during restoration efforts.
dc.language	en
dc.publisher	Springer Science and Business Media LLC
dc.relation.ispartof	Hydrobiologia
dc.relation.isbasedon	10.1007/s10750-021-04679-7
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	04 Earth Sciences, 05 Environmental Sciences, 06 Biological Sciences
dc.subject.classification	Marine Biology & Hydrobiology
dc.title	Tropical macrophytes promote phytoplankton community shifts in lake mesocosms: relevance for lake restoration in warm climates
dc.type	Journal Article
utslib.citation.volume	848
utslib.for	04 Earth Sciences
utslib.for	05 Environmental Sciences
utslib.for	06 Biological Sciences
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Life Sciences
utslib.copyright.status	closed_access	*
dc.date.updated	2022-01-13T06:07:04Z
pubs.issue	20
pubs.publication-status	Published
pubs.volume	848
utslib.citation.issue	20

Abstract:

Macrophytes can be crucial for maintaining clear water conditions in temperate shallow lakes. However, their restorative potential and role in regulating phytoplankton remains uncertain in tropical lakes. We investigated the effects of emergent (Ludwigia adscendens and Persicaria barbata) and submerged (Vallisneria spiralis) macrophytes on the phytoplankton community of a turbid tropical reservoir. Through two in situ mesocosm experiments (~ 1000 l capacity) lasting 4 weeks, we (1) determined the effects of macrophyte density on phytoplankton biomass and composition, and (2) compared these effects between emergent and submerged macrophytes. In Experiment 1, macrophyte treatments reduced phytoplankton biomass and increased water clarity in a density-dependent manner. Only the ‘high density’ treatment (300 g/m2 emergent and 650 g/m2 submerged macrophytes) induced a taxonomic and functional shift from an initial community dominated by turbid water-adapted filamentous cyanobacteria to one dominated by clear water-adapted green algae and cryptophytes. In Experiment 2, emergent and submerged macrophytes reduced phytoplankton biomass and distinctly altered taxonomic and functional composition, with submerged macrophytes inhibiting Microcystis and stimulating cryptophyte taxa. Our results indicate that macrophytes can induce substantial phytoplankton community shifts in turbid tropical lakes, demonstrating the potential to assist in the reversal from turbid to clear water states during restoration efforts.

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http://hdl.handle.net/10453/153066