Mowing Submerged Macrophytes in Shallow Lakes with Alternative Stable States: Battling the Good Guys?

Kuiper, Jan J.; Verhofstad, M.J.J.M.; Louwers, Evelien L. M.; Bakker, Elisabeth S.; Brederveld, Robert J.; Gerven, L.P.A. van; Janssen, Annette B.G.; Klein, J.J.M. de; Mooij, Wolf M.

doi:10.1007/s00267-016-0811-2

Cited by 71 publications

(51 citation statements)

References 93 publications

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“…The main impacts of using excavators to mechanically manage macrophytes are oscillations in light intensity, sediment disturbances, and increased nutrients in the water column (Kuiper et al 2017). Resuspending sediment promotes the bioavailability of phosphorus and nitrogen from the bottom; thus, providing an additional nutrient source for phytoplankton (Shaw & Prepas 1990).…”

Section: Introductionmentioning

confidence: 99%

Potential effects of mechanically removing macrophytes on the phytoplankton community of a subtropical reservoir

Wojciechowski

Burda²,

Scheer³

et al. 2018

Acta Bot. Bras.

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Intensive growth of aquatic macrophytes interferes with water quality and ecosystem dynamics worldwide. Although mechanically removing macrophytes is the most commonly used method for their eradication, it can also cause undesirable disturbances in aquatic reservoir communities. We performed laboratory incubations of phytoplankton sampled before and after macrophytes were mechanically removed from the Piraquara II reservoir, South Brazil. We analyzed changes in growth and composition of the main phytoplankton groups with respect to nutrient shifting. Prior to removing the macrophytes, the phytoplankton community was dominated by low cell abundances of diatoms and flagellates. In contrast, growth rates of cyanobacteria (mainly Cylindrospermopsis raciborskii, Pseudanabaena sp., and Geitlerinema sp.) and of colonial chlorophytes were favored after macrophyte removal, while the abundances of diatoms and flagellates decreased. Our results suggest that removing macrophytes causes dramatic changes in phytoplankton composition and biomass and selects for toxigenic species of cyanobacteria. These changes were probably associated with the disturbance caused by removing the macrophytes, which immediately created new environmental conditions prone to species competition. These findings indicate that the use of mechanical techniques to manage macrophytes should be carefully considered, along with monitoring of harmful species and changes of limnological parameters.

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Section: Introductionmentioning

confidence: 99%

Potential effects of mechanically removing macrophytes on the phytoplankton community of a subtropical reservoir

Wojciechowski

Burda²,

Scheer³

et al. 2018

Acta Bot. Bras.

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“…Fortunately, there is increasing knowledge about how local experimental or natural perturbations may be used to reveal system-wide ecological resilience, and which species serve best as indicators (Kuiper et al 2015;Van de Leemput et al 2017;Dakos 2018). For example, in shallow lakes, the regrowth rate of aquatic vegetation after harvesting a fraction of the biomass may indicate system-wide ecological resilience (Kuiper et al 2017;Van de Leemput et al 2017). Furthermore, we see much potential in the continuation of the studies where series of empirical food web models are established along environmental gradients in real ecosystems (Neutel et al 2007;Andres et al 2016;Schwarz et al 2017).…”

Section: Discussionmentioning

confidence: 99%

Bridging theories for ecosystem stability through structural sensitivity analysis of ecological models in equilibrium

Kuiper

Peterson

et al. 2019

Preprint

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Ecologists are challenged by the need to bridge and synthesize different approaches and theories to obtain a coherent understanding of ecosystems in a changing world. Both food web theory and regime shift theory shine light on mechanisms that confer stability to ecosystems, but from a different angle. Empirical food web models are developed to analyze how equilibria in real multi-trophic ecosystems are shaped by species interactions, and often include linear functional response terms for simple estimation of interaction strengths from observations. Models of regime shifts focus on qualitative changes of equilibrium points in a slowly changing environment, and typically include non-linear functional response terms. Currently, it is unclear how the stability of an empirical food web model, expressed as the rate of system recovery after a small perturbation, relates to the vulnerability of the ecosystem to collapse. Here, we conduct structural sensitive analyses of classical consumer-resource models in equilibrium along an environmental gradient. Specifically, we change non-proportional interaction terms into linear ones, while maintaining the equilibrium biomass densities and flux of matter, to analyze how alternative model formulations shape the stability properties of the equilibria. The results reveal no consistent relationship between the stability of the original models and the linearized versions, even though they describe the same biomass values and material flows. We use these findings to discuss whether stability analysis of observed equilibria by empirical food web models can provide insight into regime shift dynamics, and highlight the challenge of bridging alternative modelling approaches in ecology and beyond.

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“…S posrednimi in neposrednimi učinki vplivajo na delovanje jezerskega ekosistema. Potopljeni makrofiti igrajo pomembno vlogo pri vzdr ževanju kakovosti vode v plitvih jezerih (Kuiper et al 2017). Potopljeni makrofiti preprečujejo erozijo in pre mikanje mehkega sedimenta in vplivajo na odstranje vanje suspendiranih delcev iz vodnega stolpca (Mad sen et al 1996).…”

Section: Abstract the Importance Of Macrophytes In Lake Ecosystemunclassified

Pomen makrofitov v jezerskem ekosistemu / The importance of macrophytes in lake ecosystem

Šiling¹,

Germ

2017

FBG

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IZVLEČEK Pomen makrofitov v jezerskem ekosistemuV preglednem članku povzemamo temeljne značilnosti makrofitov v jezerskem ekosistemu. Makrofiti so povezoval ni člen med sedimentom, vodo in ozračjem. Vodne rastline vplivajo na zgradbo habitata, prav tako pa so vir avtohtonih snovi, ki so osnova za prehranjevalni splet. Rast vodnih rast lin je odvisna od mnogih okoljskih dejavnikov, ki so med seboj povezani svetloba, temperatura, vodni tok, globina ipd. Za prehod od velike kalnosti do prosojnosti vode v jeze ru sta značilni spremembi v prevladi skupin primarnih pro ducentov in vrst v celotnem prehranjevalnem spletu, kjer namesto prevladujočega fitoplanktona postanejo prevla dujoči primarni producenti submerzni makrofiti ali peri fitonske alge. Makrofiti so pomembni tudi za vrednotenje človekovega vpliva na jezerski ekosistem ter posredno pri izvajanju upravljavskih načrtov za vode.Ključne besede: makrofiti, jezera, fitoplankton, ekološko stanje ABSTRACT The importance of macrophytes in lake ecosystemIn a review paper we summarized the basic features of macrophytes in lake system. Macrophytes present link be tween sediment, water and atmosphere. Primarily aquatic plants determine the structure of habitat and present the vital source of autochthonous matter as a base for food web. The growth of aquatic plants depends on a number of envi ronmental factors, which are linked light, temperature, water flow, depth etc. Transition from high turbidity to the transparency of the water in the lake is characterized by a change in the dominance of primary producers and species throughout the food web, where instead of the dominant phytoplankton the dominant primary producers becomes submerged macrophytes or periphytic algae. Macrophytes are important for evaluating human impact on lake ecosys tems and indirectly in the management plans for water. Makrofiti imajo pomembno vlogo v vodnih ekosiste mih (Flint & Madsen 1995, Luo et al. 2016, saj so povezovalni člen med sedimentom, vodo in ozračjem. S tvorjenjem mikrohabitatov za perifiton, mest za od laganja jajčec rib in skrivališč mnogih organizmov, vplivajo na večjo biodiverziteto in heterogenost vodne ga ekosistema (Klaassen & Nolet 2007, Lampert & Sommer 2007. S svojim koreninskim sistemom in listi absorbirajo hranila in na ta način čistijo vodo (Zhou et al. 2017) ter istočasno povečujejo koncentracijo hranil ko odmrejo in razpadejo. Lahko delujejo kot indika torji kakovosti vode in sodelujejo pri kroženju hranil. Vključeni so v ekosistemske procese kot so biominera lizacija, transpiracija, izpust biogenih plinov v ozračje in sedimentacija (Carpenter & Lodge 1986). Izločajo tudi alelopatske snovi, ki vplivajo na prehranjevalni splet. Zavirajo rast fitoplanktona, bakterioplanktona (Mulderij et al. 2006) in epifitskih alg , Cerbin et al. 2007, Gross et al. 2007, Wu et al. 2007. Raziskovalci so ugotovili, da alelopatski učinki makrofitov lahko vplivajo na velik del sprememb raz položljivega ogljika v jezerih (Hilt & Gross 2008, Hilt 2006, Jürgens & Jeppesen 1998, Cerbin et al. 20...

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Mowing Submerged Macrophytes in Shallow Lakes with Alternative Stable States: Battling the Good Guys?

Cited by 71 publications

References 93 publications

Potential effects of mechanically removing macrophytes on the phytoplankton community of a subtropical reservoir

Potential effects of mechanically removing macrophytes on the phytoplankton community of a subtropical reservoir

Bridging theories for ecosystem stability through structural sensitivity analysis of ecological models in equilibrium

Pomen makrofitov v jezerskem ekosistemu / The importance of macrophytes in lake ecosystem

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