Environmental modifiers of the relationship between water table depth and Ellenberg’s indicator of soil moisture

Dwyer, Ciara; Millett, Jonathan; Pakeman, Robin J.; Jones, Laurence

doi:10.1016/j.ecolind.2021.108320

Cited by 8 publications

(4 citation statements)

References 55 publications

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“…Because many recent studies have also estimated environmental conditions using community means (e.g. Ahl et al, 2021; Baumann et al, 2021; Dwyer et al, 2021; Jaroszewicz et al, 2021), we considered all scales of published indicator values to be interval scales. Differences among published sources were smoothed by calculating means with decimal precision.…”

Section: Discussionmentioning

confidence: 99%

“…many recent studies have also estimated environmental conditions using community means (e.g. Ahl et al, 2021;Baumann et al, 2021;Dwyer et al, 2021;Jaroszewicz et al, 2021), we considered all scales As our indicator-value data set is prepared for broad-scale analyses, it uses a relatively coarse taxonomic resolution at the level of species or, in some cases, species aggregates. However, different subspecies of the same species or different narrowly-defined species within an aggregate may differ substantially in their ecological requirements for some environmental variables (e.g.…”

Section: Re Sultsmentioning

confidence: 99%

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Ellenberg‐type indicator values for European vascular plant species

Tichý

Axmanová

Dengler

et al. 2023

J Vegetation Science

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Aims: Ellenberg-type indicator values are expert-based rankings of plant species according to their ecological optima on main environmental gradients. Here we extend the indicator-value system proposed by Heinz Ellenberg and co-authors for Central Europe by incorporating other systems of Ellenberg-type indicator values (i.e., those using scales compatible with Ellenberg values) developed for other European regions. Our aim is to create a harmonized data set of Ellenberg-type indicator values applicable at the European scale.Methods: We collected European data sets of indicator values for vascular plants and selected 13 data sets that used the nine-, ten-or twelve-degree scales defined by Ellenberg for light, temperature, moisture, reaction, nutrients and salinity. We compared these values with the original Ellenberg values and used those that showed consistent trends in regression slope and coefficient of determination. We calculated the average value for each combination of species and indicator values from these data sets. Based on species' co-occurrences in European vegetation plots, we also calculated new values for species that were not assigned an indicator value. Results: We provide a new data set of Ellenberg-type indicator values for 8908European vascular plant species (8168 for light, 7400 for temperature, 8030 for

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Section: Discussionmentioning

confidence: 99%

Section: Re Sultsmentioning

confidence: 99%

Ellenberg‐type indicator values for European vascular plant species

Tichý

Axmanová

Dengler

et al. 2023

J Vegetation Science

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“…Axmanová et al 2012; Diekmann 2003; Hill and Carey 1997), and the reliability of using these surrogate variables have been discussed in several studies (e.g. Diekmann 1995; Schaffers and Sýkora 2000; Wamelink et al 2002; Dwyer et al 2021). It has been shown that Ellenberg values of nutrient status, soil reaction and nutrient ratio are valuable indicators when assessing conservation status in groundwater dependent terrestrial habitats (Andersen et al 2013).…”

Section: Discussionmentioning

confidence: 99%

Environmental drivers of the decline of the fen orchid, Liparis loeselii

Andersen,

Ejrnæs,

Minter

et al. 2024

Preprint

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BackgroundLiparis loeseliiis a rare and declining orchid species restricted to rich fens in the Northern Hemisphere. Habitat destruction, eutrophication, drainage and scrub encroachment have been suggested as reasons for the decline. However, which factors are most important is not well understood.AimsBased on vegetation and environmental properties from extant, potential and historicalL. loeseliisites, we i) developed habitat suitability models from either Ellenberg Indicator Values or field-measured environmental properties, and ii) identified the primary reasons for the observed decline ofL. loeselii.ResultsNutrient status was the most important predictor forL. loeseliioccurrence, followed by hydrology proxies (Ellenberg reaction and Ellenberg moisture). Vegetation height and Ellenberg light were of minor importance.ConclusionEffect partitioning based on sites, from whichL. loeseliihas gone locally extinct, pinpointed eutrophication and drainage to be the most likely primary drivers of the species’ demise. Phosphorus limitation induced by discharge of Calcium-rich groundwater seems to be crucial forL. loeseliito sustain populations in landscapes dominated by intensive agricultural.

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“…They are expected to be particularly sensitive to environmental changes due to complex interactions between hydrology, nutrient inputs and plant communities (Curreli et al, 2013; Rhymes et al, 2016). Depth to the water table, seasonal fluctuations and duration of drought or flood can alter species interactions and therefore community assembly (Dwyer, Millett, et al, 2021; Willis et al, 1959). The hydrological regime also influences nutrient levels within the dunes, with high water levels maintaining low nitrogen and phosphorus (Lammerts & Grootjans, 1997).…”

Section: Introductionmentioning

confidence: 99%

Patterns of variation in plant diversity vary over different spatial levels in seasonal coastal wetlands

Dwyer

Millett

Jones

et al. 2022

Diversity and Distributions

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Aim: To quantify the responses of alpha and beta diversity to multivariate gradients, incorporating variation in environmental and management variability in coastal dune slacks.Location: United Kingdom dune slacks.Methods: Plant community composition, plant nutrient status and soil characteristics were measured for 164 quadrats in 41 dune slacks across 12 coastal sand dune systems. Data were collated on climate and atmospheric deposition. Hydrological regimes at daily resolution were modelled and calibrated using daily-to-monthly site measurements, from which we calculated quadrat-level hydrological metrics. Alpha diversity (richness, Shannon diversity and Pielou's evenness) metrics and beta diversity (turnover and nestedness) for species and genera were calculated across three spatial levels from sand dune system (highest) to dune slack to quadrat (lowest).Results: Diversity patterns depended on the spatial and taxonomic level considered.At smaller spatial levels (between dune slacks and between quadrats), alpha and beta diversity varied along gradients driven by soil characteristics, water table depth and atmospheric deposition. At larger spatial levels (between sand dune systems), patterns of beta diversity were a consequence of plant nutrient status. There was little variability in alpha diversity along this same gradient, with only small changes in Pielou's species evenness. Patterns at a coarser taxonomic level (genus) mirrored those at the species level. Main conclusion:We show that patterns of variation in plant diversity are dependent on the spatial level considered, but taxonomic level made little difference in understanding these patterns. Therefore, if we do not consider patterns across different spatial levels, important environmental and management drivers could be missed. The high biodiversity value and degree of threat to these European protected habitats makes such understanding invaluable for their conservation.

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Environmental modifiers of the relationship between water table depth and Ellenberg’s indicator of soil moisture

Cited by 8 publications

References 55 publications

Ellenberg‐type indicator values for European vascular plant species

Ellenberg‐type indicator values for European vascular plant species

Environmental drivers of the decline of the fen orchid, Liparis loeselii

Patterns of variation in plant diversity vary over different spatial levels in seasonal coastal wetlands

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