Ploidy state of aquatic macrophytes: Global distribution and drivers

Magalhães, Tatiana Lobato‐de; Murphy, K. J.; Ефремов, А. Н.; Chepinoga, Victor V.; Davidson, Thomas A.; Molina‐Navarro, Eugenio

doi:10.1016/j.aquabot.2021.103417

Cited by 12 publications

(5 citation statements)

References 39 publications

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“…Similar to what has been found for several groups of New World vertebrates (Castro-Insua et al, 2016) and Fennoscandian beetles (Heino & Alahuhta, 2015), our findings supported the notion that compositional breakpoints in freshwater plants are driven by the spatially structured variation in current climatic conditions across the world. Perhaps more importantly, our results extend the views of previous biogeographical studies of freshwater plants (e.g., Chappuis et al, 2012, Murphy et al, 2019, Alahuhta et al, 2020, Lobato-de Magalhães et al, 2021 and support the foundations of global regionalisation for these organisms (see Alahuhta & García-Girón, 2022 for a tentative example on freshwater floras of Greenland, continental Canada and the USA). This reasoning is intuitive given that a biogeographical transition exists between temperate to boreal regions occurring north of 40° N and communities harbouring mainly subtropical and southernmost Mediterranean species between > 40° S and 40° N (Fig.…”

Section: Discussionsupporting

confidence: 88%

Compositional breakpoints of freshwater plant communities across continents

García‐Girón¹,

Heino²,

Baastrup‐Spohr³

et al. 2023

Limnetica

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Unravelling patterns and mechanisms of biogeographical transitions is crucial if we are to understand compositional gradients at large spatial extents, but no studies have thus far examined breakpoints in community composition of freshwater plants across continents. Using a dataset of almost 500 observations of lake plant community composition from six continents, we examined, for the first time, if such breakpoints in geographical space exist for freshwater plants and how well a suite of ecological factors (including climatic and local environmental variables) can explain transitions in community composition from the subtropics to the poles. Our combination of multivariate regression tree (MRT) analysis and k-means partitioning suggests that the most abrupt breakpoint exists between temperate to boreal regions on the one hand and freshwater plant communities harbouring mainly subtropical or Mediterranean assemblages on the other. The spatially structured variation in current climatic conditions is the most likely candidate for controlling these latitudinal patterns, although one cannot rule out joint effects of eco-evolutionary constraints in the harsher high-latitude environments and post-glacial migration lags after Pleistocene Ice Ages. Overall, our study supports the foundations of global regionalisation for freshwater plants and anticipates further biogeographical research on freshwater plant communities once datasets have been harmonised for conducting large-scale spatial analyses.

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Section: Discussionsupporting

confidence: 88%

Compositional breakpoints of freshwater plant communities across continents

García‐Girón¹,

Heino²,

Baastrup‐Spohr³

et al. 2023

Limnetica

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“…Polyploidy is extremely widespread; polyploids are found across the globe, with some terrestrial biomes containing as high as 51% polyploid frequency and mixed-ploidy species (exhibiting both diploid and polyploid cytotypes) are also common (Kolář et al, 2017; Rice et al, 2019). Similarly, 52% of aquatic plant species are thought to be either polyploid or mixed-ploidy species (Magalhães et al, 2021). Researchers have long been trying to explain this apparent enhanced ecological and evolutionary success of polyploids, particularly by investigating the genotypic and phenotypic differences of polyploids from their diploid progenitors (Comai, 2005; Madlung, 2013; Levin and Soltis, 2018; Fox et al, 2020; Van-de-Peer et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Neopolyploidy-induced changes in the giant duckweed (Spirodela polyrhiza) alter herbivore preference, performance, and plant population performance

Assour,

Ashman,

Turcotte

2023

Preprint

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PremisePolyploidy is a widespread mutational process in angiosperms that may alter population performance of not only plants but also their animal associates. Yet, knowledge of whether ploidy affects plant-herbivore dynamics is scarce. Here, we test whether aphid herbivores exhibit preference for diploid or neopolyploid plants, whether ploidy impacts plant and herbivore performance, and whether these interactions depend on plant genetic background.MethodsUsing multiple pairs of independently synthesized neotetraploid greater duckweed (Spirodela polyrhiza) and their diploid progenitors, we evaluated the effect of neopolyploidy on duckweed’s interaction with the water-lily aphid (Rhopalosiphum nymphaeae). Using two-way choice experiments, we first evaluated feeding preference by the herbivore. We then evaluated the consequences of ploidy on aphid and plant performance by measuring population growth over multiple generations.Key ResultsAphids preferred neopolyploids over diploids when the plants were provided at equal abundances but not when they were provided at equal surface area, indicating the role of plant size in driving this preference. Additionally, neopolyploidy increased aphid population performance, but this result was highly dependent on the genetic lineage of the plant. Lastly, the impact of herbivory on neopolyploids vs. diploid duckweed varied greatly with genetic lineage, but overall, neopolyploids appeared to be generally less tolerant than diploids.ConclusionsWe conclude that polyploidization can impact the preference and performance of herbivores on their plant hosts, whereas plant performance depends on complex interactions between herbivory, ploidy, and genetic lineage. These results have significant implications for the establishment and persistence of plants and herbivores in nature.

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“…According to this scheme, subregion I contained several indicative specialists of endemic origin. This area corresponds to southernmost South America and it has not only been shown to hold particular wetland plant assemblages (Lacoul & Freedman, 2006; Manzo et al, 2020), but also contains unique genetic characteristics, demonstrated, for example, by its high percentage of polyploid species (Lobato‐de Magalhaes et al, 2021). Subregion II had no associated taxa, probably because of its high heterogeneity in the latitudinal gradient, since this area included different phytogeographical units that have yielded indicator species (e.g., units 36 and 38).…”

Section: Discussionmentioning

confidence: 99%

“…, but also contains unique genetic characteristics, demonstrated, for example, by its high percentage of polyploid species (Lobato-deMagalhaes et al, 2021). Subregion II had no associated taxa, probably because of its high heterogeneity in the latitudinal gradient, since this area included different phytogeographical units that have yielded indicator species (e.g., units 36 and 38).…”

mentioning

confidence: 99%

Which regionalization scheme is the best to predict wetland plant distribution in Western Patagonia?

Manzo

Epele

Grech

et al. 2022

J Vegetation Science

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Questions: Given the current multiplicity of threats to pond biodiversity, there is a clear need to examine which environmental drivers determine the composition and distribution of species. Using wetland plants as pond biodiversity surrogates, two questions led to this work: How do wetland plant species assemblages and abundance vary across local-and regional-scale classification schemes in wetlands? How does wetland plant beta-diversity vary within these wetland classification schemes?Location: Western Patagonia, Argentina, from 36°S to 56°S and from 73°W to 65°W. Methods:Wetland plant distribution constrained by water and climatic factors was analyzed using canonical correspondence analysis. Variance partitioning analysis was performed to assess which classification scheme (phytogeographical units, wetland regions, wetland genesis and hydrogeomorphological types) better explained variation in plant composition. An IndVal analysis was also carried out to detect taxa with the highest association values (indicator taxa) for the different categories of wetland classification. Beta-diversity was calculated to evaluate variation patterns within classification schemes.Results: Plant distribution was mainly related to site location across the latitudinal gradient, following a decreasing pattern of air temperature from northern to southern wetlands. Variance partitioning analysis confirmed the effectiveness of a regionalscale classification (wetland regions) in predicting plant associations, and the IndVal analysis also highlighted this classification scheme above the remainder, sustaining the highest number of indicator taxa. Wetland plant beta-diversity patterns were explained by relatively high species turnover, with species composition showing low nestedness values. Conclusion:Climate factors rather than local characteristics were the main drivers of plant distribution at the wide regional scale analyzed. Wetland region (classification based on climatic criteria) was the most effective scheme in predicting plant associations and sustaining the highest number of indicator taxa. Also, ponds located in the Patagonian Andes and those with a glacigenic origin contribute most to the regional wetland plant diversity. Therefore, these aspects should be taken directly 2 of 15 |

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Ploidy state of aquatic macrophytes: Global distribution and drivers

Cited by 12 publications

References 39 publications

Compositional breakpoints of freshwater plant communities across continents

Compositional breakpoints of freshwater plant communities across continents

Neopolyploidy-induced changes in the giant duckweed (Spirodela polyrhiza) alter herbivore preference, performance, and plant population performance

Which regionalization scheme is the best to predict wetland plant distribution in Western Patagonia?

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