scholarly journals AQUATIC AND MARSHY VEGETATION IN THE CENTER OF THE LOWER PLAIN OF SOMES RIVER: GENERAL CHARACTERISATION

2021 ◽  
Vol 56 ◽  
pp. 105-111
Author(s):  
Manuela Octavia FECSKE ◽  
Keyword(s):  
Species Composition ◽  
Plant Communities ◽  
Habitats Directive ◽  
Short Paper ◽  
European Level ◽  
Red Lists ◽  
Wetland Drainage ◽  
Plant Associations ◽  
Community Types ◽  
Successional Change

Aiming to a larger study of vegetation of the lower Some Plain (Romania), this short paper summarises the outcome of the floristic inventories performed in aquatic and marshy vegetation, which was dominant in the area until about three centuries ago when the extended wetland drainage has started. By using the phytosociological method, 20 plant associations assigned to four vegetation classes were distinguished. Without presenting phytosociological tables at this first stage, the syntaxonomical framework, distribution and species composition of the revealed plant communities are briefly discussed by reference to the process of wetland drying and successional change as well as to newly formed anthropogenic lakes. The conservative value of some plant community types is emphasized by mentioning the presence of several endangered species that are included in the European-level Habitats Directive and various regional or national red lists/books.

scholarly journals Classification of plant communities in Sierra Rica, Manuel Benavides, Chihuahua, Mexico

2019 ◽  
Vol 13 (1) ◽  
pp. 197-207
Author(s):  
Alicia Juárez-Pérez ◽  
Alicia Melgoza-Castillo ◽  
Carmelo Pinedo-Álvarez ◽  
Eduardo Estrada-Castillón
Keyword(s):  
Plant Communities ◽  
Larrea Tridentata ◽  
Pine Forest ◽  
Oak Forest ◽  
Vegetation Patterns ◽  
Plant Associations ◽  
Community Types ◽  
And Cluster Analysis ◽  
Desert Scrub

Sierra Rica is a mountain island located in the plains of the northeastern region of the Chihuahua Desert and has a diversity of vegetation patterns. To study this patterns the vegetation was characterized using GIS and cluster analysis, which identified five community types: pine forest (780 ha), oak forest (1640 ha), grassland (550 ha), desert scrub (866 ha), and rosetophyllous desert scrubland (628 ha). By the use of TWINSPAN software, four main vegetation groups containing 10 main plant associations were identified: (1) Pinus-Quercus forest, (2) grassland, (3) pine forest, (4) Rhus-Juniperus, (5) Pinus-Quercus and xeric species, (6) grassland-desert scrub, (7) desert microphyll scrub, (8) Quercus-Aloysia-Bouteloua association, (9) Acacia constricta scrubland, and (10) Larrea tridentata scrubland. The association among groups and species was significant (P < 0.0001). The subsequent analysis shows a high dependence among species inside the main groups and independence between groups.

Long-term dynamics and destruction of marsh vegetation in the Kolokolkova Bay of the Barents Sea

2012 ◽  
pp. 66-77 ◽  
Author(s):  
I. A. Lavrinenko ◽  
O. V. Lavrinenko ◽  
D. V. Dobrynin
Keyword(s):  
Species Composition ◽  
Plant Communities ◽  
Barents Sea ◽  
Mean Value ◽  
Marsh Vegetation ◽  
Composition And Structure ◽  
The Mean ◽  
Species Composition And Structure

The satellite images show that the area of marshes in the Kolokolkova bay was notstable during the period from 1973 up to 2011. Until 2010 it varied from 357 to 636 ha. After a severe storm happened on July 24–25, 2010 the total area of marshes was reduced up to 43–50 ha. The mean value of NDVI for studied marshes, reflecting the green biomass, varied from 0.13 to 0.32 before the storm in 2010, after the storm the NDVI decreased to 0.10, in 2011 — 0.03. A comparative analysis of species composition and structure of plant communities described in 2002 and 2011, allowed to evaluate the vegetation changes of marshes of the different topographic levels. They are fol­lowing: a total destruction of plant communities of the ass. Puccinellietum phryganodis and ass. Caricetum subspathaceae on low and middle marches; increasing role of halophytic species in plant communities of the ass. Caricetum glareosae vic. Calamagrostis deschampsioides subass. typicum on middle marches; some changes in species composition and structure of plant communities of the ass. Caricetum glareosae vic. Calamagrostis deschampsioides subass. festucetosum rubrae on high marches and ass. Parnassio palustris–Salicetum reptantis in transition zone between marches and tundra without changes of their syntaxonomy; a death of moss cover in plant communities of the ass. Caricetum mackenziei var. Warnstorfia exannulata on brackish coastal bogs. The possible reasons of dramatic vegetation dynamics are discussed. The dating of the storm makes it possible to observe the directions and rates of the succession of marches vegetation.

CHARACTERISTICS OF THE CLIFF PLANT COMMUNITIES OF THE TUAPKHAT MASSIF

2017 ◽  
Author(s):  
Sergey Krylenko ◽  
Sergey Krylenko
Keyword(s):  
Sustainable Development ◽  
Plant Communities ◽  
Biological Diversity ◽  
Life Forms ◽  
The Black Sea ◽  
Plant Associations ◽  
Black Sea Coast ◽  
Paper Structure ◽  
Sea Coast ◽  
Main Factor

Preservation of biological diversity is necessary for sustainable development and rational use of coastal resources. In this paper structure of the cliff plant communities of the massif Tuapkhat (the Black Sea coast, Russia) are characterized. Flora of this coastal zone combines features of Mediterranean and middle European Russia types. Herbaceous and shrub life-forms and xeromorphous and petrophilous plant associations dominate at the studied area. The main factor determining the species composition of the examined communities is substrate character.

CHARACTERISTICS OF THE CLIFF PLANT COMMUNITIES OF THE TUAPKHAT MASSIF

2017 ◽  
Author(s):  
Sergey Krylenko ◽  
Sergey Krylenko
Keyword(s):  
Sustainable Development ◽  
Plant Communities ◽  
Biological Diversity ◽  
Life Forms ◽  
The Black Sea ◽  
Plant Associations ◽  
Black Sea Coast ◽  
Paper Structure ◽  
Sea Coast ◽  
Main Factor

Preservation of biological diversity is necessary for sustainable development and rational use of coastal resources. In this paper structure of the cliff plant communities of the massif Tuapkhat (the Black Sea coast, Russia) are characterized. Flora of this coastal zone combines features of Mediterranean and middle European Russia types. Herbaceous and shrub life-forms and xeromorphous and petrophilous plant associations dominate at the studied area. The main factor determining the species composition of the examined communities is substrate character.

scholarly journals Vegetation Diversity of Screes and Taluses of The Pamir and South-Western Tian Shan in Middle Asia

2021 ◽  
Author(s):  
Arkadiusz Nowak ◽  
Sebastian Świerszcz ◽  
Sylwia Nowak ◽  
Marcin Nobis
Keyword(s):  
Species Composition ◽  
Arid Zone ◽  
Field Studies ◽  
Vegetation Diversity ◽  
Plant Associations ◽  
Middle Asia ◽  
Recent Developments ◽  
Phytosociological Relevés ◽  
High Degree ◽  
Tian Shan

AbstractThis paper presents the results of phytosociological research on scree vegetation of the Pamir and south-western Tian Shan. We collected 222 phytosociological relevés during field studies conducted in 2015–2019, applying the Braun-Blanquet approach. We identified 21 plant communities on mobile and stabilized screes of colluvial cones, aprons and fans, inhabiting mainly the montane and alpine belts in several ranges (e.g. Peter the First, Alichur, Shugnan, Shachdarian, Darvaz, Rushan, Vanch, Fergana, Kyrgyz and Terskey ranges). As a result we provide the first comprehensive hierarchical syntaxonomic synopsis of scree communities at montane and alpine elevations in the eastern Middle Asia. The collected vegetation relevés represent the majority of the variation among the phytocoenoses of gravel, pebble, cobble and rock block slides and screes in the montane and alpine belts. As a result of field studies and Twinspan analyses, nine associations were identified on screes of the Pamir and western Tian Shan. All these communities were assigned to the Sileno brahuicae-Lactucetalia orientalis Nowak et al. 2021. Additionally, within the nitrophilous compact gravel screes one subassociation of Corydalidetum kashgaricae trigonelletosum gontscharovii was distinguished. In the most arid zone two additional plant associations and one subassociation were identified in gravelly semi-deserts zone. The main factors determining the species composition of the studied associations are scree mobility, rock particle size, elevation above sea level and slope inclination. Our research revealed considerable diversity of scree habitats of montane and alpine belts what might be astonishing regarding harsh environment of this mountainous territory. However, a great number of lineages that evolved here and particularly rich species pool of this habitat in Middle Asia facilitate remarkable diversity among vegetation of taluses and screes. The distinctiveness of species composition is additionally enhanced by high degree of endemism of chasmophytic habitats in the eastern part of Middle Asia. Despite recent developments, the prominent chasmophytic vegetation of Middle Asia still needs thorough studies focused on its relationship to semi-desert, tall-forb and petrophytic communities of high mountains of the Pamir, Hindu-Kush, Kunlun and Central Tian Shan.

scholarly journals Disentangling the Ecological Determinants of Species and Functional Trait Diversity in Herb-Layer Plant Communities in European Temperate Forests

Forests ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 552
Author(s):  
Janez Kermavnar ◽  
Lado Kutnar ◽  
Aleksander Marinšek
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
Plant Communities ◽  
Functional Trait ◽  
Forest Stand ◽  
Relative Importance ◽  
Herb Layer ◽  
Bud Bank ◽  
Tree Species Composition ◽  
Stand Characteristics

Forest herb-layer vegetation responds sensitively to environmental conditions. This paper compares drivers of both taxonomic, i.e., species richness, cover and evenness, and functional herb-layer diversity, i.e., the diversity of clonal, bud bank and leaf-height-seed plant traits. We investigated the dependence of herb-layer diversity on ecological determinants related to soil properties, climatic parameters, forest stand characteristics, and topographic and abiotic and biotic factors associated with forest floor structure. The study was conducted in different forest types in Slovenia, using vegetation and environmental data from 50 monitoring plots (400 m2 each) belonging to the ICP Forests Level I and II network. The main objective was to first identify significant ecological predictors and then quantify their relative importance. Species richness was strongly determined by forest stand characteristics, such as richness of the shrub layer, tree layer shade-casting ability as a proxy for light availability and tree species composition. It showed a clear positive relation to soil pH. Variation in herb-layer cover was also best explained by forest stand characteristics and, to a lesser extent, by structural factors such as moss cover. Species evenness was associated with tree species composition, shrub layer cover and soil pH. Various ecological determinants were decisive for the diversity of below-ground traits, i.e., clonal and bud bank traits. For these two trait groups we observed a substantial climatic signal that was completely absent for taxonomy-based measures of diversity. In contrast, above-ground leaf-height-seed (LHS) traits were driven exclusively by soil reaction and nitrogen availability. In synthesis, local stand characteristics and soil properties acted as the main controlling factors for both species and trait diversity in herb-layer communities across Slovenia, confirming many previous studies. Our findings suggest that the taxonomic and functional facets of herb-layer vegetation are mainly influenced by a similar set of ecological determinants. However, their relative importance varies among individual taxonomy- and functional trait-based diversity measures. Integrating multi-faceted approaches can provide complementary information on patterns of herb-layer diversity in European forest plant communities.

Lichens of swamp complexes of Sakhalin Island (Sakhalin Region, Russian Far East)

2021 ◽  
Vol 55 (2) ◽  
pp. 405-426
Author(s):  
I. F. Skirina ◽  
N. A. Tsarenko ◽  
F. V. Skirin
Keyword(s):  
Species Composition ◽  
Russian Far East ◽  
Far East ◽  
Sakhalin Island ◽  
The South ◽  
Red Lists ◽  
The Far East ◽  
First Time ◽  
Lichen Flora

This paper presents the results of the study of lichen flora in swamp complexes of Sakhalin Island, obtained during expeditionary research in 2005–2009 and 2014–2020. The revealed species composition of lichens includes 172 species. The 28 of them are new for Sakhalin and 93 are new for the island swamp complexes. Bryocaulon pseudosatoanum is included in the regional and federal Red lists. Lecidea nylanderi is new to the south of the Far East. The information about substrates, habitats and locations is given for all species. The data on the distribution in the south of the Far East and, in some cases for all Far East, are listed for selected species that are new for Sakhalin Island and the south of the Far East. For the first time, a characteristic of the distribution of lichens in oligotrophic, eutrophic and mesotrophic bogs of Sakhalin Island is given.

scholarly journals Vegetation dynamics under non-strong agricultural impact (by the example of Oktyabrsk village environs in the Uchalinskiy District of the Republic of Bashkortostan)

2021 ◽  
Vol 10 (1) ◽  
pp. 121-127
Author(s):  
Nazar Nikolayevich Nazarenko ◽  
Svetlana Yuryevna Batyusheva
Keyword(s):  
Plant Communities ◽  
Vegetation Dynamics ◽  
Vascular Plants ◽  
Abiotic Factors ◽  
Pasture Digression ◽  
Plant Associations ◽  
Republic Of Bashkortostan ◽  
Principal Factors ◽  
The Republic ◽  
Agricultural Impact

Vegetation and its biotopes that are transitional between ruderal and natural ones have been researched in Oktyabrsk village environs (Uchalinskiy District of the Republic of Bashkortostan). The studied vegetation is characterized by rather low biodiversity values and high values of dominance 56 species of vascular plants are identified, 10-species plant communities with 23 clear identified dominant and co-dominant species prevail. Ruderal species are dominant and co-dominant for the majority of plant communities. Fifteen plant associations and specific biotopes have been defined by multivariate statistics methods. The identified associations are phytometers for detected principal abiotic factors. The detected associations form ordination series the authors have identified three biotopical centers (ruderal, birch forest and steppe), three biotopical series and three coenotic series, which are associated with high and temperate pasture loading levels and pasture digression series, forming an integrated succession system of the studied territory. It has been established that principal factors of associations forming is pasture loading level and the principal factors of biotopes forming are soil moistening and its variability, ombroregime (humidification level), termoregime and regime of continentality (temperature-varying amplitude).

Seed banks as a neglected area of biogeographic research: a review of literature and sampling techniques

1993 ◽  
Vol 17 (3) ◽  
pp. 329-347 ◽  
Author(s):  
Susan J. Warr ◽  
Ken Thompson ◽  
Martin Kent
Keyword(s):  
Species Composition ◽  
Plant Communities ◽  
Seed Bank ◽  
Relevant Literature ◽  
Landscape Management ◽  
Seed Banks ◽  
Sampling Techniques ◽  
Sample Collection ◽  
Sample Distribution ◽  
Tropical Environments

The article highlights a comparatively neglected area of biogeographical research - seed banks and the distribution of seeds in the soil. The article reviews some of the relevant literature on seed banks and the methods for their study. Attention is focused on aspects of seed banks of particular relevance to biogeographers, with detailed examples drawn from seed bank studies in both temperate and tropical environments. In the review of the seed bank literature, the topics covered include the seed banks of successional communities and the size of seed banks in different vegetation types. The species composition of seed banks in different plant communities is discussed, particularly the degree of correlation between the species composition of seed banks and associated ground flora. The relationships between seed persistence, depth of burial in the soil and soil properties, such as moisture and pH, are explored. Seed bank heterogeneity is examined and a number of studies which have attempted to describe and measure the spatial variability of seed banks are summarized. Ways of classifying seed banks in terms of seed bank strategies are explained. The role of seed banks in conservation is discussed, for example in restoration projects, where preferred species have been lost from the vegetation but survive in the seed bank. The relevance of seed banks for the conservation of rare species and in landscape management is considered. Lastly, the contribution of seed banks to the recovery of vegetation following disturbance in various plant communities is discussed. In the review of seed bank sampling techniques, the subjects considered include methods of sample collection, the sampling intensity required for reliable estimates of seed density, a consideration of the relative merits of random and systematic sample distribution, as well as the importance of the timing of sampling. Various methods for the estimation of seed numbers in samples are appraised; these either involve extraction of seeds from the soil, followed by seed identification or enumeration by germination and seedling identification. Problems of analysing seed bank data are considered and several useful techniques for data analysis are suggested. Finally, the article draws attention to areas of future seed bank research for biogeographers and plant ecologists.

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