scholarly journals Contribution to the knowledge of Mediterranean wetland vegetation: Lemnetea and Potamogetonetea classes in Western Sicily

2021 ◽  
Vol 58 (1) ◽  
pp. 107-131
Author(s):  
Orazio Caldarella ◽  
Lorenzo Lastrucci ◽  
Rossano Bolpagni ◽  
Lorenzo Gianguzzi
Keyword(s):  
Dominant Species ◽  
Aquatic Vegetation ◽  
Floristic Composition ◽  
Wetland Vegetation ◽  
Statistical Analyses ◽  
Western Sector ◽  
Class A ◽  
Mediterranean Island ◽  
Western Sicily ◽  
New Association

The freshwater aquatic vegetation of the Lemnetea and Potamogetonetea classes in Western Sicily was surveyed and analyzed. 85 lakes and small pools were investigated collecting 147 phytosociological unpublished relevés to integrate the very scarce available data (only 3 relevés). By applying statistical analyses on abundances data and on the bases of physiognomy and dominant species, two alliances (Lemnion minoris and Stratiotion) and four different coenoses have been identify for the Lemnetea class; while 11 associations, assigned to two orders (Potamogetonetalia pectinati and Callitricho hamulatae-Ranunculetalia aquatilis) and four alliances (Potamogetonion, Nymphaeion albae, Ranunculion aquatilis and Ranunculion omiophyllo-hederacei) have been recognized for the Potamogetonetea class. A new association (Junco bufonii-Ranunculetum omiophylli ass. nov.) and a new subassociation (Ranunculetum peltati ranunculetosum rionii subass. nov.) have been proposed, whereas other six vegetation units were found to be new for the study area (Potamogetono-Ceratophylletum submersi, Potamogetonetum pusilli, Ranunculetum aquatilis, Ranunculetum peltati and Ranunculetum rionii, Lemno-Callitrichetum obtusangulae). For all the coenoses recognized, new insights on the floristic composition, syntaxonomy, synphiognomy, synecology and synchorology are reported, offering a reasoned overview of the aquatic vegetation of the western sector of the main Mediterranean island.

Geobotanical studies at the Caucasus: a review of materials of the International Conference “Flora and conservation in the Caucasus: history and current state of knowledge” (Pyatigorsk, May 22–25, 2019)

2019 ◽  
pp. 91-94
Author(s):  
T. M. Lysenko ◽  
V. Yu. Neshatayeva ◽  
Z. V. Dutova
Keyword(s):  
Plant Communities ◽  
Aquatic Vegetation ◽  
Plant Cover ◽  
Floristic Composition ◽  
Current Status ◽  
Wide Field ◽  
The Caucasus ◽  
International Conference ◽  
Rare And Endangered Species ◽  
Current State

The International conference “Flora and conservation in the Caucasus: history and current state of knowledge” dedicated to the 130-year anniversary of the Perkalsky Arboretum took place at 22–25 of May 2019 in Pyatigorsk (Stavropol Territory) on the base of the Pyatigorsk Museum of local lore and natural history. The participants were from 11 cities of Russia and 7 Republics of the Caucasus and represented 14 institutions. Proceedings of the conference were published by the beginning of the meeting the book of abstracts includes 49 papers on the study of vascular plants, bryophytes, lichens and fungi, plant communities, as well as the protection of rare and endangered species, unique plant communities, and ecological problems in the Caucasus. The following geobotanical topics were highlighted in 13 papers: forest communities (3 reports), meadow and steppe vegetation (2), xeric open forests (2), communities of ecotone areas (1), structure of populations of rare plant species (3), as well as the history and current status of nature protected areas (2). The great emphasis has been focused on the study of floristic composition and plant populations. Thus, the conference showed that very few studies от vegetation are currently carried out in the Caucasus, and a lot of districts are not affected by the research. The greatest attention is paid to forest vegetation while meadow, steppe, alpine heath and xerophytic communities are studied rather poorly. Besides, there are “white spots” — mire, floodplain and aquatic vegetation. In nowadays, when the anthropogenic impact on the plant cover of the Caucasus is intensively increasing, it is especially important to study natural undisturbed communities preserved in protected natural areas. Another important issue is the conservation of the unique vegetation cover of the whole Caucasus. Thus, the study of vegetation of this region opens a wide field for researchers using various methods of modern plant science.

Numerical classification of French vegetation of Carici caryophylleae – Genistetea lobelii J.-C. Klein 1972

2021 ◽  
Vol 42 ◽  
pp. e68062
Author(s):  
Pauline Delbosc ◽  
Mathieu Le Dez ◽  
Jean-Bernard Bouzillé ◽  
Kevin Cianfaglione ◽  
Frédéric Bioret
Keyword(s):  
Expert System ◽  
Dominant Species ◽  
Numerical Classification ◽  
Distribution Map ◽  
Diagnostic Species ◽  
Plant Associations ◽  
Formal Definitions ◽  
Twinspan Classification ◽  
New Association

Carici-Genistetea lobelii Klein 1972 corresponds to cyrno-sardinian oromediterranean cushion scrub and related grasslands. In France, this class is only present in Corsica and the syntaxonomic scheme is debated among phytosociologists. The aim of this paper is to highlight the main plant associations of Carici-Genistetea lobelii Klein 1972 and to define the diagnostic species for each phytosociological unit. We compiled 519 vegetation plots and we applied EuropeanVegetationChecklist expert system for the classes of European vegetation to retain only vegetation plots belonging to Carici-Genistetea lobelii. We obtained a dataset with 189 vegetation plots and we classified them with Modified TWINSPAN classification. Our analyses recognized 6 plant associations and 3 sub-associations already described in the literature; and to describe a new alliance corresponding to the supra-mediterranean vegetations (Genistion salzmannii), a new association (Brimeuro fastigiatae-Juniperetum nanae) and its sub-association (alnetosum suaveolentis). For each of them, we identified diagnostic, constant and dominant species and produced their distribution map. Formal definitions were then written for each phytosociological unit (from subassociation to class) and grouped in an expert system to automatically classify the vegetations of Carici-Genistetea lobelii.

scholarly journals Abundance, diversity and distribution of macrophyte communities in neighboring lakes of different trophic states and morphology in north-central Greece

2011 ◽  
Vol 63 (3) ◽  
pp. 763-774 ◽  
Author(s):  
Chrisoula Pirini ◽  
Vasiliki Karagiannakidou ◽  
Savvas Charitonidis
Keyword(s):  
Environmental Factors ◽  
Aquatic Vegetation ◽  
Floristic Composition ◽  
Diversity Indices ◽  
North Central ◽  
Wetland Ecosystems ◽  
Central Greece ◽  
Clear Differentiation ◽  
Evenness Indices

The role of aquatic vegetation in wetland ecosystems is closely related with their abundance, diversity and distribution, which in turn represents synergy of various environmental factors. The floristic composition of the aquatic vegetation in two neighboring lakes (Vegoritida and Petron) in north-central Greece was investigated by means of 160 relev?s, which were recorded using the Braun-Blanquet method. The analysis of relev?s based on TWINSPAN clustering showed the existence of 10 plant communities from the Lemnetea, Potametea, Phragmito-Magnocaricetea and Juncetea maritimi classes. The most important environmental factors for the vegetation differentiation in the study area, according to the ordination diagram, are light intensity and water depth of the habitats. The plant species diversity was quantified with species richness, Shannon Diversity and evenness indices at a scale of each relev?, with a sampling size of 20 m2. There was a clear differentiation between the relev?s at the more eutrophic Petron Lake and those at Vegoritida Lake. The mean plot diversity was also calculated for each plant community, to enable comparison of the diversity indices among the communities at the plot level.

The demography of a dominant Amazon liana species exhibits little environmental sensitivity

2015 ◽  
Vol 32 (1) ◽  
pp. 79-82 ◽  
Author(s):  
Luciana de Campos Franci ◽  
Jens-Christian Svenning ◽  
Henrik Balslev ◽  
Fernando Roberto Martins ◽  
Jacob Nabe-Nielsen
Keyword(s):  
Dominant Species ◽  
Environmental Gradients ◽  
Floristic Composition ◽  
Environmental Variation ◽  
Common Species ◽  
Amazon Forest ◽  
Vegetation Density ◽  
Vital Rates ◽  
Relative Growth ◽  
Positive Effect

Abstract:Despite its high plant diversity, the Amazon forest is dominated by a limited number of highly abundant, oligarchic tree and liana species. The high diversity can be related to specific habitat requirements in many of the less common species, but fewer studies have investigated the characteristics of the dominant species. To test how environmental variation may contribute to the success of dominant species we investigated whether the vital rates of the abundant liana Machaerium cuspidatum is sensitive to canopy height, topographic steepness, vegetation density, soil components and floristic composition across an Ecuadorian Amazon forest. The population was inventoried in 1998 and in 2009. Plants were divided into seedling-sized individuals, non-climbers and climbers. Out of 448 seedling-sized plants 421 died, 539 of 732 non-climbers died, and 107 of 198 climbers died. There was weak positive effect of dense understorey on the relative growth rate of climbers. The mortality of seedling-sized plants was higher in areas with intermediate slope, but for larger plants mortality was not related to environmental variation. The limited sensitivity of the vital rates to environmental gradients in the area suggests that ecological generalism contributes to the success of this dominant Amazonian liana.

scholarly journals Tram tracks as specific anthropogenic habitats for the growth of plants

2016 ◽  
Author(s):  
Paulina Woźnica ◽  
Alina Urbisz ◽  
Andrzej Urbisz ◽  
Izabella Franiel
Keyword(s):  
Species Composition ◽  
Dominant Species ◽  
Nitrate Nitrogen ◽  
Plantago Lanceolata ◽  
Floristic Composition ◽  
Amaranthus Retroflexus ◽  
Achillea Millefolium ◽  
Silene Vulgaris ◽  
Anthropogenic Habitats ◽  
Hieracium Pilosella

Although tramway tracks are found in most cities, their flora is not thoroughly researched. Many more studies relate to railway areas as specific anthropogenic habitats for the development of plants. Both railway and tram tracks represent specific ecological migration corridors for plants. The objective of this study was to determine the relationship between the floristic composition and selected soil parameters of tram tracks. In 2014-2015, floristic studies were carried out along tram tracks in the Upper Silesian conurbation (southern Poland). Depending on the dominant species, five groups of sites with varying floristic composition were distinguished. Five plots with an area of 1 m2 were randomly selected in each of the sites. The species composition was determined at each plot together with the cover-abundance of all species occurring at a given plot according to Westhoff’s and van Maarel’s scale. Soil samples were collected from each plot and analysed for pH, the content of biogenic elements and heavy metals. A total of 329 species of vascular plants were identified on the tram tracks of the surveyed area, and 40 species on the plots. The dominant species included: Amaranthus retroflexus, Achillea millefolium, Plantago lanceolata, Hieracium pilosella, Silene vulgaris, Taraxacum sp. and Trifolium repens. Grouping of plots in respect of soil factors largely reflects their species composition. It has been found that the content of nitrate nitrogen, lead and phosphorus has the strongest impact on the floristic diversity of the railway tracks. Based on these parameters, three groups of species were distinguished: nitrophytes, metallophytes and common, i.e. not closely associated with the studied soil properties. Three habitat types of varying plant species composition were distinguished based on the content of nitrate nitrogen and lead: 1) nitrophilous dominated by Amaranthus retroflexus, 2) with increased content of heavy metals, dominated by Silene vulgaris and 3) mesotrophic dominated by meadow species (Achillea millefolium, Plantago lanceolata, Hieracium pilosella, Taraxacum sp., Trifolium repens).

scholarly journals The effect of dominant species on numbers and agę structure of Iris sibirica L. population on blue moor-grass meadow in southern Poland

2011 ◽  
Vol 76 (2) ◽  
pp. 165-173 ◽  
Author(s):  
Kinga Kostrakiewicz
Keyword(s):  
Seed Production ◽  
Age Structure ◽  
Vegetative Propagation ◽  
Dominant Species ◽  
Floristic Composition ◽  
Field Observations ◽  
Grass Meadow ◽  
High Level ◽  
Two Populations ◽  
Clonal Species

Two populations of <em>Iris sibirica</em>, a clonal species protected by law in Poland, occurring in patches of <em>Molinietum caeruleae</em>, of similar floristic composition although with different dominant species, were studied. In the Stanisławice locality, species with a high competitive potential prevailed, contrary to the Opatkowice locality, where the species of low competitive potential dominated. It was established that vegetative propagation ensures the continued presence of populations in both localities, although the proximity of plants with high competitive potential limits the vegetative propagation of ramet clusters of <em>Iris sibirica</em>. Despite the high level of seed production, the recruitment of seedlings in both patches is possible only in artificially created gaps. The field observations support the conclusion that creating gaps allowing for germination of seeds and development of seedlings, as well as eliminating expansive neighbours allowing proliferation of ramet clusters of <em>Iris sibirica</em>, is an affective way of protecting populations of this species.

Long-term monitoring of an invasion process: the case of an isolated small wetland on a Mediterranean Island

Biologia ◽  
2011 ◽  
Vol 66 (4) ◽  
Author(s):  
Bruno Foggi ◽  
Lorenzo Lastrucci ◽  
Daniele Viciani ◽  
Giorgio Brunialti ◽  
Renato Benesperi
Keyword(s):  
Floristic Composition ◽  
Common Reed ◽  
Invasion Process ◽  
Aquatic Communities ◽  
Wetland Ecosystems ◽  
Mediterranean Island ◽  
Vegetation Maps ◽  
Gis System ◽  
Floristic Characteristics ◽  
The Impact

AbstractInvasions of Typha (cattail) and/or Phragmites (common reed) in wetland ecosystems result in changes in species richness, diversity and composition of vascular plants. These invasions are particularly harmful in lakes where threatened species and/or communities are found. The spread of two species of Typha (T. angustifolia and T. latifolia) and of Phragmites australis in the Stagnone Lake, on Capraia Island (Tuscan Archipelago — Mediterranean sea) was studied. We report this progressive invasion, documented by means of a series of vegetation maps (1991, 1995, 1998 and 2009). The expansion rate of the three invasive helophytes and the shrinking of the aquatic communities were studied using a GIS system. The impact of the spread of these three species on the floristic characteristics of the plant communities and the lake vegetation in general, was analysed by means of 15 plots of 1 m2 in 2000 and in 2009. Statistical analysis of the two series shows a significant change in the floristic composition of the communities as a result of the invasion process. Many important groups of species, such as many aquatic species, decrease in number and in cover value.

scholarly journals Unexpected Discovery of Thelypteris palustris (Thelypteridaceae) in Sicily (Italy): Morphological, Ecological Analysis and Habitat Characterization

Plants ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 2448
Author(s):  
Saverio Sciandrello ◽  
Salvatore Cambria ◽  
Gianpietro Giusso del Galdo ◽  
Gianmarco Tavilla ◽  
Pietro Minissale
Keyword(s):  
Floristic Composition ◽  
Mediterranean Area ◽  
Ecological Analysis ◽  
Ecological Features ◽  
Italian Regions ◽  
Declining Populations ◽  
New Association ◽  
Thelypteris Palustris ◽  
Almost All ◽  
Sicilian Population

Thelypteris palustris Schott (Thelypteridaceae), known as “marsh fern”, is infrequent in the Mediterranean area. The occurrence of this species is known for almost all the Italian regions (except for Sardinia and Sicily), but with rare and declining populations. During floristic fieldwork on the Sicilian wetlands, a new unknown population was found. The aim of this paper is to analyze the morphological traits of the species, as well as its ecological features and the floristic composition of the plant communities where it lives. According to IUCN guidelines, here we provide the regional assessment (Sicily) of T. palustris. To analyze its morphological features, many living plants were examined, with particular attention to the spore structure. A total of 179 plots (110 species) and 34 pools were sampled. Our results highlight the relic character of the species which is at the southernmost border of its distribution range. The micro-morphological investigations on the spores show that the Sicilian population belongs to the subsp. palustris. The floristic analysis confirms the clear dominance of perennial temperate-cold zones Eurasian taxa. Finally, a new association, Thelypterido palustris-Caricetum paniculatae, within the Caricion gracilis alliance (Phragmito-Magnocaricetea class) is described.

scholarly journals Ecological evaluation of natural water bodies in the south part of Noginscky Region Moscow District

2020 ◽  
Vol 612 (1) ◽  
pp. 012045
Author(s):  
D A Postnikov
Keyword(s):  
Aquatic Vegetation ◽  
Trifolium Pratense ◽  
Poa Pratensis ◽  
Floristic Composition ◽  
Common Reed ◽  
Water Area ◽  
Phleum Pratense ◽  
Water Bodies ◽  
Blue Lake ◽  
Carex Riparia

Abstract Floristic composition of terrestrial and aquatic plants in the ecotopes of surface water bodies, Blue Lakes and Lake Biserovo, was studied to assess environmental health of aquatic ecosystems in the Moscow region. The research was carried out both in the field and in the laboratory. Blue Lakes were lacking aquatic vegetation and the dominant synusia of the following plant species was found along the coastal zone: meadow clover (Trifolium pratense L.), meadow bluegrass (Poa pratensis L.), sedge coastal (Carex riparia Curt.), chamomile (Matricaria chamomilla L.), plantain (Plantago major L.), Timothy meadow (Phleum pratense L.). The vegetation cover of Lake Biserovo was patchy: submerged vegetation was most widespread, Canadian Elodea (Elodea canadensis Michx.) was the dominant species. Pure thickets of vegetation were formed only by the common American water plantain(Alisma plantago-aquatica L.), lake cattail (Schoenoplectus lacustris L.), common reed (Phragmites communis Trin.) and sedge coastal (Carex riparia Curt). It should be noted that in all the studied water bodies, the pH of the water area can be classified as very clean: Blue Lakes (7.8), samples from Lake Biserov (8.32). Water samples from Lake Biserova had the highest turbidity (11.5), which was associated with the accumulation of particles of the silt fraction of the reservoir, which began the process of eutrophication, high anthropogenic load. According to the results of a comprehensive assessment (hydrological indicators, calculation of the Mayer index) of the studied samples from the reservoirs, it was concluded that the water area of the Blue Lake had the best environmental status in the Noginsk region.

scholarly journals Association Convolvulo-Polygonetum aviculare (ass. new) in Weed Vegetation of Vineyard Region in Herzegovina

2015 ◽  
Vol 15 (3) ◽  
pp. 281
Author(s):  
Zlatan Kovačević
Keyword(s):  
Soil Moisture ◽  
Gradient Analysis ◽  
Floristic Composition ◽  
Numerical Classification ◽  
Thermophilic Species ◽  
New Association ◽  
Complete Set ◽  
Species Gradient ◽  
High Degree ◽  
Biological Spectrum

Floristic-phytocenological research of weed vegetation in vineyards of Bosnia and Herzegovina determined a new association Convolvulo-Polygonetumaviculare (ass. new). Regarding floristic character, the asso­ciation was qualified by numerous thermophilic species, and it was ranked in the mediterranean syntaxonomic unit DiplotaxionBr.-Bl. 1931 em 1936 from ordo ChenopodietaliamediterraneaBr.-Bl. 1931 em 1936. Stands association builds 56 plant species. A complete set of association is built by five species: ConvolvulusarvensisL., PolygonumaviculareL., Cynodondactylon (L.) Pers., PortulacaoleraceaL. and ChenopodiumalbumL. Biological spectrum of association shows dominance of hemi­therophytes (62,50%) and hemikryptophytes which together make up 85,71% of the species. Gradient analysis shows very little dependence of floristic composition in relation to soil moisture medium rich in minerals. The value of the coefficient of correlation points a relatively high degree of dependence floristic composition in comparison to the gradient of light and temperature. Areal spectrum of associations suggests the dominance of cosmopolitan and mediterranean group of floral elements. By means of numerical classification and ordination of stands, there may be distin­guished two groups of stands. 

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