Submerged freshwater plant communities do not show species complementarity effect in wetland mesocosms

Riis, Tenna; Olesen, Annica; Jensen, Solvei Mundbjerg; Alnoee, Anette Baisner; Baattrup‐Pedersen, Annette; Lauridsen, Torben L.; Sorrell, Brian K.

doi:10.1098/rsbl.2018.0635

Cited by 13 publications

(9 citation statements)

References 13 publications

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“…This lack of positive diversity-productivity relationship was observed in other studies with submerged plant species 58,59 . A possible explanation for the general result of positive plant diversity-productivity relationships in terrestrial systems and different results for freshwater systems is may be the lack of complementarity effects among similar growth forms as submerged plants may in general be more similar in their resource use 60 . Even though we should be cautious about these considerations due to the low number of studies performed, this suggests the view that successful invasions are very context-dependent 61,62 .…”

Section: Discussionmentioning

confidence: 99%

Species identity and diversity effects on invasion resistance of tropical freshwater plant communities

Petruzzella

Rodrigues

Leeuwen

et al. 2020

Sci Rep

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Biotic resistance mediated by native plant diversity has long been hypothesized to reduce the success of invading plant species in terrestrial systems in temperate regions. However, still little is known about the mechanisms driving invasion patterns in other biomes or latitudes. We help to fill this gap by investigating how native plant community presence and diversity, and the presence of native phylogenetically closely related species to an invader, would affect invader Hydrilla verticillata establishment success in tropical freshwater submerged plant communities. The presence of a native community suppressed the growth of H. verticillata, but did not prevent its colonisation. Invader growth was negatively affected by native plant productivity, but independent of native species richness and phylogenetic relatedness to the invader. Native plant production was not related to native species richness in our study. We show that resistance in these tropical aquatic submerged plant communities is mainly driven by the presence and biomass of a native community independent of native species diversity. Our study illustrates that resistance provided by these tropical freshwater submerged plant communities to invasive species contrasts to resistance described for other ecosystems. This emphasizes the need to include understudied systems when predicting patterns of species invasiveness and ecosystem invasibility across biomes.Biological invasions represent a key component of human-induced global changes, and increasingly challenge the conservation and management of freshwater, marine and terrestrial ecosystems across the globe 1,2 . Although our knowledge on invasion ecology has increased considerably over the last decades, research has been strongly biased towards certain geographical regions and ecosystems 3-6 . Most of our understanding about the process, patterns and mechanisms of invasions emerges from studies performed in temperate terrestrial systems, whereas the impact on megadiverse tropical regions -that together harbor the greatest part of the Earth's biodiversityremains surprisingly understudied 3,5,7,8 . Similarly, freshwater systems, which are both hotspots of biodiversity and have been heavily impacted by human activities, are the least studied among ecosystem realms 3,9 . The lack of information is especially problematic because tropical systems are among the most threatened on earth, and freshwater ecosystems show the strongest biodiversity decline 10-12 . Understanding the mechanisms underlying the success or failure of invasions is essential for possible prevention, control or management of invasive species.Studies have suggested that tropical systems may be less susceptible to invasions than temperate systems 13,14 . An important rationale for this idea is that the highly species-rich native communities generally found in tropical systems, may resist invasions through biotic processes such as competition 15 . The biotic resistance hypothesis predicts that, during alien plant invasion, more diverse commu...

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Section: Discussionmentioning

confidence: 99%

Species identity and diversity effects on invasion resistance of tropical freshwater plant communities

Petruzzella

Rodrigues

Leeuwen

et al. 2020

Sci Rep

View full text Add to dashboard Cite

show abstract

“…This mechanism was largely supported in temperate regions where plant diversity has been experimentally manipulated (Naeem et al 2000, Hector et al 2001, Petruzzella et al 2018. In general, the increased resistance to invader with increasing native species richness could be that communities with higher species richness have higher productivity, and thus provide more resource competition through complementarity and/or sampling effects (Riis et al 2018).…”

Section: Introductionmentioning

confidence: 96%

The success of alien plants in an arid ecosystem: Structural equation modeling reveals hidden effects of soil resources

et al. 2021

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The diversity of a native community is not the sole driving factor determining the success of an invader; abiotic factors can also play a role, making it important to understand their contributions in modifying the expected outcome of biotic and abiotic resistance to invasion. In order to test the contributions of native diversity, relatedness between native and alien plants, and abiotic factors in resisting alien invasion, we used a trait-environment data set of 33 alien-and 130 native plants in 166 invaded plots, covering a gradient of soil resources in Saint-Katherine-Protectorate, an arid-protected area in Egypt. We measured the native diversity components as predictors of native biotic resistance. We quantified the success of alien plants based on their abundance and their performance traits. Additionally, we calculated the mean functional and phylogenetic distance between aliens and natives in each plot. We tested all plausible influences of native diversity components, relatedness, and soil resources on alien abundance and performance first using mixed-effects models and second with a structural equation model (SEM). Mixed-effect models revealed that, in the resource-rich environments, alien abundance increased even though native plants were more productive, but alien performance decreased. SEM direct pathways revealed that native communities with high functional dispersion and richness and high mean-weighted performance traits repelled alien plants by lowering their success. Simultaneously, in line with mixed-effect models results, the effect of soil resources on alien success was found to be indirect, being mediated by the mean functional and phylogenetic distance between aliens and natives: The success of alien plants increased in resourcerich environments when they were dissimilar to the natives, while it decreased for aliens similar to natives in resource-limited environments. Our findings provide new insights on native community resistance to invasion, with resistance being higher in resource-limited environments and when aliens are functionally and phylogenetically similar to resident natives.

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“…However, using this for large outdoor mesocosms at the cubic metre scale is not feasible. Most mesocosms are usually filled with surrounding lake/sea water or tap/groundwater, depending on availability [13][14][15][16]. While these waters vary in their physico-chemical properties, it may still be reasonable to use them in mesocosms, provided precautions are made based on the organisms' needs.…”

Section: Introductionmentioning

confidence: 99%

Evaluating Multiple Stressor Effects on Benthic–Pelagic Freshwater Communities in Systems of Different Complexities: Challenges in Upscaling

Vijayaraj

Kipferler

Stibor

et al. 2022

Water

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Upscaling of ecological effects from indoor microcosms to outdoor mesocosms bridging the gap between controlled laboratory conditions and highly complex natural environments poses several challenges: typical standard water types used in laboratory experiments are not feasible in large outdoor experiments. Additionally, moving from the micro- to meso-scale, biodiversity is enhanced. We performed an indoor microcosm experiment to determine the effects of agricultural run-off (ARO) on a defined benthic–pelagic community comprising primary producers and primary consumers, exposed to ambient summer temperature and +3.5 °C. Treatments were replicated in two water types (standard Volvic and Munich well water). We then scaled up to outdoor mesocosms using an ARO concentration gradient and +3 °C warming above ambient temperature, using Munich well water. We included the same benthic macroorganisms but more complex periphyton and plankton communities. All the functional groups were affected by stressors in the microcosms, and a shift from macrophyte to phytoplankton dominance was observed. While effects were present, they were less pronounced in the mesocosms, where a higher biodiversity may have modified the responses of the system to the stressors. The stressor effects observed in controlled experiments may thus be masked in more complex outdoor experiments, but should not be interpreted as “no effects”.

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Submerged freshwater plant communities do not show species complementarity effect in wetland mesocosms

Cited by 13 publications

References 13 publications

Species identity and diversity effects on invasion resistance of tropical freshwater plant communities

Species identity and diversity effects on invasion resistance of tropical freshwater plant communities

The success of alien plants in an arid ecosystem: Structural equation modeling reveals hidden effects of soil resources

Evaluating Multiple Stressor Effects on Benthic–Pelagic Freshwater Communities in Systems of Different Complexities: Challenges in Upscaling

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