Snails have stronger indirect positive effects on submerged macrophyte growth attributes than zooplankton

Mormul, Roger Paulo; Ahlgren, Johan; Brönmark, Christer

doi:10.1007/s10750-017-3391-0

Cited by 18 publications

(7 citation statements)

References 43 publications

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“…In addition, the pathway from the snail to macrophytes was nonsignificant (Figure 4), which indicates that the changes in snails cannot directly explain the variation in macrophytes. These results further demonstrate that snail communities have indirect positive effects on submerged macrophyte growth through the removal of epiphytic algae and phytoplankton (Mormul et al, 2018).…”

Section: Discussionsupporting

confidence: 61%

“…Snails positively affected submerged macrophyte growth and development by increasing biomass, as demonstrated in both simulation experiments and field investigations (Li et al, 2008 ; Mormul et al, 2018 ; Yang et al, 2020 ). We found that the presence of snails significantly reduced the biomass of epiphytic algae and phytoplankton (Figure 3 ).…”

Section: Discussionmentioning

confidence: 73%

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Snail communities increase submerged macrophyte growth by grazing epiphytic algae and phytoplankton in a mesocosm experiment

Guan

Fan

et al. 2022

Ecology and Evolution

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Section: Discussionsupporting

confidence: 61%

Section: Discussionmentioning

confidence: 73%

Snail communities increase submerged macrophyte growth by grazing epiphytic algae and phytoplankton in a mesocosm experiment

Guan

Fan

et al. 2022

Ecology and Evolution

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“…Furthermore, biological factors in lakes also play an important role in regulating the development of periphyton communities through bottom-up and top-down effects, and this may partly explain the change of its community (Garcia et al, 2015;Mormul et al, 2017;Beck et al, 2019). However, with the lack of snail and fish data in our study, it was not possible to evaluate their impacts on the periphyton, which may help to explain why all the measured environment indicators did not have a higher explanation (only 50.2%) for the changes in the community structure of periphyton.…”

Section: Discussionmentioning

confidence: 99%

“…Changes in the biomass and species composition of periphyton are regulated by biological groups, for example, invertebrates and vertebrate (Jones and Sayer, 2003;Cebrian et al, 2013). For example, benthic fish disturbance will potentially facilitate the release of nutrients from the sediment, thereby promoting periphyton growth (Meerhoff et al, 2007;Jeppesen et al, 2010), while invertebrates can remove periphyton biomass and alter community composition through direct grazing (Garcia et al, 2015;Mormul et al, 2017;Beck et al, 2019;Wolters et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Changes of Periphyton Abundance and Biomass Driven by Factors Specific to Flooding Inflow in a River Inlet Area in Erhai Lake, China

Ren

Yao

Zhang

et al. 2021

Front. Environ. Sci.

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Periphyton is an ecological essential in freshwater lakes and rivers. Its abundance and biomass are very dynamic in various habitats and subject to various factors, for example, nutrient and light. Following flooding events, the transitional area adjacent to a river inlet and the shallow lake generates diverse habitats for periphyton with gradients in current velocity, suspended matters, nutrients, and light, which would strongly shape the growth and community of periphyton. In this study, three sampling sites were established around a river inlet in Erhai Lake, China, and a field survey was conducted in the sites from April to August (flooding seasons) in 2019 to investigate the abundance and biomass of periphyton and explore influential factors. The results showed that three study areas have different gradients of current velocity depending on the distance to the river inlet, thereby regulating the concentrations of nutrients and suspended matters, which strongly affected the periphyton community; to be specific, the biomass of periphyton was inhibited by the concentration of suspended matters and high concentrations of silicate mainly reduced the diversity of periphyton. Our results imply that the study on the driving factors of periphyton could help to understand its community assembly mechanism and biomass and species composition of periphyton can provide some reference for trophic state of the lake.

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“…. Herbivory is an important mechanism in controlling aquatic macrophytes in freshwater ecosystems (Xiong et al 2008;Li et al 2009;Schooler et al 2011;Bakker et al 2016;Wood et al 2017;Mormul et al 2018;O'Hare et al 2018;Strange et al 2018), in which snails may negatively impact the macrophytes (Carlsson and Lacousière 2005;Gross and Lombardo 2018). Herbivores may also reduce populations of native macrophyte species, however, thus facilitating colonization by invasive species, which become established due to less regulation by the herbivore than the native species in the invaded habitat (i.e., enemy release hypothesis; Keane and Crawley 2002).…”

mentioning

confidence: 99%

Native snails choose an invasive macrophyte over a native macrophyte as a food resource

et al. 2019

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Invasive species cause ecological and economic impacts on invaded ecosystems, although the presence of native species hampers the propagation of invasive species due to biotic resistance. We tested the effects of grazing by the native channeled applesnail (Pomacea canaliculata (Lamarck, 1828)) over the invasive macrophyte Hydrilla verticillata (L. f.) Royle (water thyme) and the native macrophyte Egeria najas Planch to evaluate the potential of herbivory as a mechanism to resist invasion. Both macrophyte species were offered, individually and combined, as food resources to the snail to evaluate its feeding preference. The macrophyte energy content and stiffness were also measured. The results indicate a higher H. verticillata biomass consumption by P. canaliculata when this macrophyte was available both individually and combined with E. najas, suggesting that H. verticillata is more palatable to the snail, despite this macrophyte being stiffer than the native one. Therefore, P. canaliculata may offer resistance to H. verticillata invasion. The feeding preference and high rates of herbivory by this snail on H. verticillata likely are associated with the higher energy content of the invasive, compared with the native, macrophyte. Experiments combining different food availabilities and snail densities are necessary to evaluate the biological control capacity of P. canaliculata under different scenarios.

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Snails have stronger indirect positive effects on submerged macrophyte growth attributes than zooplankton

Cited by 18 publications

References 43 publications

Snail communities increase submerged macrophyte growth by grazing epiphytic algae and phytoplankton in a mesocosm experiment

Snail communities increase submerged macrophyte growth by grazing epiphytic algae and phytoplankton in a mesocosm experiment

Changes of Periphyton Abundance and Biomass Driven by Factors Specific to Flooding Inflow in a River Inlet Area in Erhai Lake, China

Native snails choose an invasive macrophyte over a native macrophyte as a food resource

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