Contribution to bryophyte flora of Croatia: new finding of rare aquatic moss Fissidens fontanus (Bach. Pyl.) Steud. in Lake Visovac (Krka National Park)

Šegota, Vedran; Gulin, Ivan; Rimac, Anja; Alegro, Antun

doi:10.20302/nc.2019.28.6

Cited by 3 publications

(3 citation statements)

References 17 publications

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“…Besides the primary intention of the WFD to ensure water quality assessment on the national level, the implementation of monitoring in Croatia yielded a significant amount of new national bryophyte records. Through five years of intensive field surveys of Croatian freshwaters, as many as eight bryophyte species were found as new for national bryoflora: Fissidens fontanus ( Alegro et al 2019 , Šegota et al 2019 ), Dichodontium flavescens , Ricciocarpos natans ( Alegro et al 2019 ), Physcomitrium eurystomum ( Rimac et al 2019b ), Physcomitrium sphaericum ( Ellis et al 2020 ), Riccia rhenana ( Ellis et al 2020 ) and Bryum klinggraeffii and Philonotis marchica ( Rimac et al 2021 ). In addition, several rare or doubtful species with only old historical data have been confirmed ( Fissidens arnoldii , Hygroamblystegium fluviatile , Leptobryum pyriforme , Physcomitrium patens , Riccia cavernosa , R. frostii , R. glauca ) within this study.…”

Section: Discussionmentioning

confidence: 99%

Croatian freshwater bryoflora–diversity and distribution

Rimac¹,

Šegota²,

Alegro³

et al. 2022

BDJ

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An extensive macrophyte field survey of running and standing waters was conducted from 2016 to 2021 at 786 sampling sites across Croatia as a part of the implementation of the Water Framework Directive. This survey is the first to present a comprehensive floristic catalogue of the freshwater bryoflora, along with an analysis of the distribution and diversity patterns on a national level. In all, 83 bryophyte species (68 mosses and 15 liverworts) were recorded in the 228 sites, with average species richness of 4.17 species per site. The most frequent species were Fontinalis antipyretica, Rhynchostegium riparioides, Leptodictyum riparium and Cratoneuron filicinum. The majority of the species encountered were rarely found, with over 70% of species recorded on less than 10 sampling sites and the majority of the species not being truly aquatic, rather being classified as facultative aquatics. The Dinaric Ecoregion, characterised by clean, cold, fast-flowing karstic rivers, especially in the Continental Subecoregion, supported higher freshwater bryophyte diversity than the lowland Pannonian Ecoregion, with mostly slow, eutrophic lowland watercourses with unstable sandy and gravelly alluvial sediments. Chorological comparison of Croatian eco- and subecoregions revealed the expected dominance of circumpolar and European elements, i.e. temperate chorotypes, as well as some biogeographical differences. The most frequent life forms were aquatic trailings and turfs. Amongst the recorded species, perennials and colonists were the most represented life strategies. The analysis of both the life-form and life-strategy spectra showed some differences amongst the Croatian regions, supporting the fact that the Dinaric Ecoregion provides more truly aquatic habitats and microhabitats suitable for the freshwater bryophytes, while in the Pannonian Ecoregion freshwater bryophytes dominantly inhabit the periodically submerged riparian zones, for example shaded lowland forest streams and rivulets or gently sloping margins of rivers and lakes.

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Section: Discussionmentioning

confidence: 99%

Croatian freshwater bryoflora–diversity and distribution

Rimac¹,

Šegota²,

Alegro³

et al. 2022

BDJ

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“…As the data used in this study were gathered in the course of the national macrophyte monitoring conducted for the purpose of assessing the ecological status of waterbodies as required by the WFD, we want to emphasize the importance of its implementation, as it encouraged research into freshwater bryophytes and their ecology on a national [15,22,[67][68][69][70][71][72] and European level [1,2,4,5,14,28,29,50,51,53] by including this group as a part of macrophyte vegetation. Our research is the first into the ecology of the aquatic bryophytes in Croatia, exploring the ecological responses of the most frequent species and determining the influence of different environmental variables on their occurrence.…”

Section: Discussionmentioning

confidence: 99%

Ecological Preferences and Indication Potential of Freshwater Bryophytes–Insights from Croatian Watercourses

Rimac

Alegro

Šegota

et al. 2022

Plants

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A comprehensive survey of Croatian watercourses covering the whole of the national territory and investigating inherent watercourse heterogeneity was conducted to explore the ecological responses of the most frequent freshwater bryophytes with respect to water chemistry variables and land use within the catchment area. Direct multivariate ordination (CCA) of vegetation data paired with 18 environmental variables revealed that freshwater bryophytes and their assemblages were segregated along the gradients of water chemistry and the proportion of natural and urban area within the catchment. Generalized additive models (GAM) were employed to explore the ecological responses of individual species. The results showed that most of the investigated species preferred natural, clean, well-oxygenated watercourses, with low nutrient and organic matter content, as well as with low electrical conductivity. Species such as Palustriella falcata, Eucladium vertcillatum, Dichodontium flavescens and Jungermannia atrovirens had narrow ecological niches and were restricted to pristine watercourses, while the most frequent and widely distributed species, such as Fontinalis antipyretica, Rhynchostegium riparioides, Cratoneuron filicinum, Fissidens crassipes, Cinclidotus fontinaloides and C. riparius, had a wide ecological tolerance. Riccia fluitans and Leptodyctium riparium had wide ecological ranges, but with optima in hypereutrophic waters with high nutrient and organic content, as well as high electrical conductivity. Furthermore, these two species were frequently associated with a high share of intensive agriculture and a low share of natural land within the catchment.

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“…Although many new species have been discovered and the distribution and ecological patterns have been clarified within this project, the majority of these data have not yet been published. While discoveries of macro-algae (Alegro et al, 2016;Koletić et al, 2017Koletić et al, , 2018Koletić et al, , 2019Koletić et al, , 2020, aquatic bryophytes (Alegro et al, 2019;Rimac et al, 2019;Šegota et al, 2019a) and invasive aquatic plants (Rimac et al, 2018) have been readily published, data on general aquatic vascular flora (Šegota et al, 2019b) are still largely unprinted.…”

Section: Introductionmentioning

confidence: 99%

Aquatic plants of Croatia: Data derived from the ZA herbarium collection

Zeko¹,

Šegota

Vilović

et al. 2021

Nat. Croat.

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As many as 963 herbarium sheets featuring 76 aquatic plant taxa from the ZA collection were digitised and published online through the Virtual Herbarium. Aquatic plants have been collected over a period of 176 years, with three peaks (second decade of the 20th century, in the 1940s and 1950s, and in the current decade). Most of the specimens were collected in Croatia and a smaller number in neighbouring and geographically close countries. The importance of the collection is expressed through the specimens of many rare and threatened species, because it represents the only evidence of their presence in Croatia (the regionally extinct Caldessia parnassifolia, as well as Luronium natans, Callitriche platycarpa, C. truncata, C. hermaphroditica, Potamogeton alpinus, P. compressus, P. polygonifolius, Nuphar × spenneriana and Sparganium minimum). The collection in ZA is a valuable source of data about the historical and recent distribution of aquatic plants that constitute a foundation for the estimation of distribution changes, threat assessment and conservation policies.

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Contribution to bryophyte flora of Croatia: new finding of rare aquatic moss Fissidens fontanus (Bach. Pyl.) Steud. in Lake Visovac (Krka National Park)

Cited by 3 publications

References 17 publications

Croatian freshwater bryoflora–diversity and distribution

Croatian freshwater bryoflora–diversity and distribution

Ecological Preferences and Indication Potential of Freshwater Bryophytes–Insights from Croatian Watercourses

Aquatic plants of Croatia: Data derived from the ZA herbarium collection

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