Articoli di riviste: "Hygromorphic"

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Birch, Emily, Ben Bridgens, Meng Zhang e Martyn Dade-Robertson. "Bacterial Spore-Based Hygromorphs: A Novel Active Material with Potential for Architectural Applications". Sustainability 13, n. 7 (5 aprile 2021): 4030. http://dx.doi.org/10.3390/su13074030.

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This paper introduces a new active material which responds to changes in environmental humidity. There has been growing interest in active materials which are able to respond to their environment, creating dynamic architectural systems without the need for energy input or complex systems of sensors and actuators. A subset of these materials are hygromorphs, which respond to changes in relative humidity (RH) and wetting through shape change. Here, we introduce a novel hygromorphic material in the context of architectural design, composed of multiple monolayers of microbial spores of Bacillus subtilis and latex sheets. Methods of fabrication and testing for this new material are described, showing that small actuators made from this material demonstrate rapid, reversible and repeatable deflection in response to changes in RH. It is demonstrated that the hygromorphic actuators are able to lift at least 150% of their own mass. Investigations are also extended to understanding this new biomaterial in terms of meaningful work.

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Tamaru, Juntaro, Toshiya Yui e Tomoko Hashida. "Autonomously Moving Pine-Cone Robots: Using Pine Cones as Natural Hygromorphic Actuators and as Components of Mechanisms". Artificial Life 26, n. 1 (aprile 2020): 80–89. http://dx.doi.org/10.1162/artl_a_00310.

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We have developed autonomously moving pine-cone robots, which are made of multiple joined pine-cone scales for outdoor natural environments. We achieved these natural robots by using pine cones as both natural hygromorphic actuators and components of the mechanisms. When they are put in outdoor places where moist periods (e.g., rain) and dry periods repeatedly occur, they can move up and down on the spot or move forward. This article describes the motivation behind our research, the design and implementation of three different hygromorphic actuators, and applications for autonomously moving robots in nature.

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Holstov, Artem, Ben Bridgens e Graham Farmer. "Hygromorphic materials for sustainable responsive architecture". Construction and Building Materials 98 (novembre 2015): 570–82. http://dx.doi.org/10.1016/j.conbuildmat.2015.08.136.

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Lee, Sang-Wook, Jacob H. Prosser, Prashant K. Purohit e Daeyeon Lee. "Bioinspired Hygromorphic Actuator Exhibiting Controlled Locomotion". ACS Macro Letters 2, n. 11 (11 ottobre 2013): 960–65. http://dx.doi.org/10.1021/mz400439a.

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Alexander, S. L. M., S. Ahmadmehrabi e L. T. J. Korley. "Programming shape and tailoring transport: advancing hygromorphic bilayers with aligned nanofibers". Soft Matter 13, n. 33 (2017): 5589–96. http://dx.doi.org/10.1039/c7sm00962c.

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Shrestha, Milan, Zhenbo Lu e Gih-Keong Lau. "High humidity sensing by ‘hygromorphic’ dielectric elastomer actuator". Sensors and Actuators B: Chemical 329 (febbraio 2021): 129268. http://dx.doi.org/10.1016/j.snb.2020.129268.

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Grönquist, Philippe, Prijanthy Panchadcharam, Dylan Wood, Achim Menges, Markus Rüggeberg e Falk K. Wittel. "Computational analysis of hygromorphic self-shaping wood gridshell structures". Royal Society Open Science 7, n. 7 (luglio 2020): 192210. http://dx.doi.org/10.1098/rsos.192210.

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Bi-layered composites capable of self-shaping are of increasing relevance to science and engineering. They can be made out of anisotropic materials that are responsive to changes in a state variable, e.g. wood, which swells and shrinks by changes in moisture. When extensive bending is desired, such bilayers are usually designed as cross-ply structures. However, the nature of cross-ply laminates tends to prevent changes of the Gaussian curvature so that a plate-like geometry of the composite will be partly restricted from shaping. Therefore, an effective approach for maximizing bending is to keep the composite in a narrow strip configuration so that Gaussian curvature can remain constant during shaping. This represents a fundamental limitation for many applications where self-shaped double-curved structures could be beneficial, e.g. in timber architecture. In this study, we propose to achieve double-curvature by gridshell configurations of narrow self-shaping wood bilayer strips. Using numerical mechanical simulations, we investigate a parametric phase-space of shaping. Our results show that double curvature can be achieved and that the change in Gaussian curvature is dependent on the system’s geometry. Furthermore, we discuss a novel architectural application potential in the form of self-erecting timber gridshells.

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Pelliccia, Giulia, Giorgio Baldinelli, Fabio Bianconi, Marco Filippucci, Marco Fioravanti, Giacomo Goli, Antonella Rotili e Marco Togni. "Characterisation of wood hygromorphic panels for relative humidity passive control". Journal of Building Engineering 32 (novembre 2020): 101829. http://dx.doi.org/10.1016/j.jobe.2020.101829.

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Taccola, Silvia, Francesco Greco, Edoardo Sinibaldi, Alessio Mondini, Barbara Mazzolai e Virgilio Mattoli. "Toward a New Generation of Electrically Controllable Hygromorphic Soft Actuators". Advanced Materials 27, n. 10 (2 gennaio 2015): 1668–75. http://dx.doi.org/10.1002/adma.201404772.

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Jesús, Inés Sastre-De. "Estudios preliminares sobre comunidades de briofitas en troncos en descomposición en el bosque subtropical lluvioso de Puerto Rico". Bryophyte Diversity and Evolution 6, n. 1 (31 dicembre 1992): 181–91. http://dx.doi.org/10.11646/bde.6.1.21.

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The bryophyte communities growing on decaying logs in the subtropical wet forests of Puerto Rico are described. Logs were classified according to presence or absence of bark and wood texture. Logs with bark are dominated by members of the Lejeuneaceae and Calymperaceae. In softwood logs, Taxithelium planum and Isopterygium tenerum were abundant. It is suggested in a preliminary manner that due to low fluctuation of water content in heavily decayed logs, hygromorphic bryophytes are favored.

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Krapež Tomec, Daša, Aleš Straže, Andreas Haider e Mirko Kariž. "Hygromorphic Response Dynamics of 3D-Printed Wood-PLA Composite Bilayer Actuators". Polymers 13, n. 19 (22 settembre 2021): 3209. http://dx.doi.org/10.3390/polym13193209.

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The use of wood particles in wood-plastic composites (WPC) is well known and similar use could occur in materials for fused deposition modeling (FDM) 3D printing. Wood particles could be one of the possible solutions in the search for natural-based materials to minimize the use of synthetic-origin materials in additive manufacturing. Wood particles for 3D printing filaments can be made from wood waste and could serve as a cheap filler or as a value-added reinforcing component, depending on their properties and incorporation. The disadvantages of wood (dimensional changes due to water adsorption and desorption) could be used as functions when dimensional change is desirable, such as in shape-changing 4D printing materials. In this research, FDM printing materials made of polylactic acid (PLA), with different amounts of wood particles, were used to design moisture-induced shape-changing bilayer actuators, which could serve as a principle for active façade or ventilation valves. The initial research shows that the wood content in the WPC causes dimensional changes and thus shape changes of the designed actuators under changing climates. The shape change depends on the ratio of the materials in the two-layered actuator and the wood content in the wood-PLA composite used, and thus on sorption. The rate of the shape change behaves in the same way: the higher the wood content, the greater the change observed. The dynamics of the hygromorphism of bimaterial composites is greater with a small amount of added hygromechanically active material.

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Mathesan, Santhosh, Amrita Rath e Pijush Ghosh. "Insights on Water Dynamics in the Hygromorphic Phenomenon of Biopolymer Films". Journal of Physical Chemistry B 121, n. 16 (12 aprile 2017): 4273–82. http://dx.doi.org/10.1021/acs.jpcb.7b00980.

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AL NAHARI, Bassam, Khalid ZARBANE e Zitouni BEIDOURI. "Moisture-Responsive Cellulose For 4D Printing". Incertitudes et fiabilité des systèmes multiphysiques 8, n. 2 (2024): 17–21. http://dx.doi.org/10.21494/iste.op.2024.1227.

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Particularly focusing on 4D printing, a technology enabling objects to transform over time. We explore smart materials, emphasizing moisture-responsive variants crucial for 4D printing. Notably, cellulose emerges as key, offering renewable and sustainable bio-based filaments. We detail the meticulous preparation of cellulose from sugarcane bagasse, obtaining high-purity fibers essential for 4D printing. These filaments exhibit versatile stiffness and moisture responsiveness, crucial for hygromorphic structures. Our proposed method integrates a codesign approach tailored for 4D printing, utilizing fused filament fabrication and cellulose-filled filaments. Through this investigation, we uncover cellulose’s potential in sensor technology and additive manufacturing, marking significant progress in responsive materials and 4D printing.

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El Hachem, Chady, Kamilia Abahri, Jérôme Vicente, Rachid Bennacer e Rafik Belarbi. "Hygromorphic characterization of softwood under high resolution X-ray tomography for hygrothermal simulation". Heat and Mass Transfer 54, n. 9 (7 marzo 2018): 2761–69. http://dx.doi.org/10.1007/s00231-018-2311-9.

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Lisnichuk, А. M., R. S. Panasenko, L. A. Verykivskyi e R. L. Yavorivskyi. "АВТОХТОННА ТА ІНТРОДУКОВАНА ДЕНДРОФЛОРА КРЕМЕНЕЦЬКОГО БОТАНІЧНОГО САДУ". Scientific Issue Ternopil Volodymyr Hnatiuk National Pedagogical University. Series: Biology 83, n. 3-4 (20 aprile 2024): 8–15. http://dx.doi.org/10.25128/2078-2357.23.3-4.1.

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The results of study of the current state of dendrofloraon the territory of Kremenets Botanical Garden are presented. The taxonomic composition was studied, systematic and botanical-geographical analyzes were carried out, biological and ecological features of woody plants growing and cultivated on the territory of the institution were analyzed. According to the latest inventory, the collection fund includes 318 species and 96 cultivars of woody plants, which belong to 80 genera and are grouped into 44 families. Department Magnoliophyta dominates by the number of families – (39, 88,64 %), genera (68, 85 %) and species (337, 81,40 %). Division Pinophyta is represented by 5 genera (11.36 %), 12 families (15,0 %), 77 species (18,60 %). According to the classification of I. G. Serebriakovthe collection is dominated by trees (51,21 %), including: deciduous (44.69 %), evergreen (6.52 %). Among shrubs (45,41 %), deciduous ones (31.40 %) predominate, evergreens make up a small group (14,01 %). Semi-shrubs are represented by semi-evergreen specimens (3,14 %). According to ecological indicators, 3 types of ecomorphs were identified: heliomorphic, hygromorphic, and trophomorphic. According to the degree of adaptation to lighting, heliophytes (238, 72,46 %) predominate in composition of the studied flora, the group of mesotrophs (156 species, 49,06 %) predominates according to the trophic indicator, mesophytes dominate among hygromorphs (287, 90,25 %). Introducers have adapted to local growing conditions and coexist well with native species. In general, natural and climatic conditions are favorable for introduction of woody plants from various floristic regions of the Holarctic. The East Asian, Atlantic-North American and Circumboreal floristic regions are the most represented. In the collections and expositions, the most represented plants are in the range from 5 to 20 years. The staff of the Garden laid plots of the following genera complexes: Сotoneaster (Соtoneaster), Rhododendron (Rhododendron), Magnolia (Magnolia), Spiraea (Spiraea), Pinophyta (Pinophyta), and lilac (Syringa).

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Kang, Hosung, Minki Lee, Hyuneui Lim, Howard A. Stone e Jinkee Lee. "Hygromorphic actuator from a metal oxide film driven by a nano-capillary forest structure". NPG Asia Materials 9, n. 8 (agosto 2017): e417-e417. http://dx.doi.org/10.1038/am.2017.139.

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El Hachem, Chady, Pan Ye, Kamilia Abahri e Rachid Bennacer. "Fiber’s hygromorphic effect on thermal conductivity of wooden fibrous insulation characterized by X-ray tomography". Construction and Building Materials 150 (settembre 2017): 758–65. http://dx.doi.org/10.1016/j.conbuildmat.2017.06.013.

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Li, Peng, Ling Pan, Dexi Liu, Yubo Tao e Sheldon Q. Shi. "A Bio-Hygromorph Fabricated with Fish Swim Bladder Hydrogel and Wood Flour-Filled Polylactic Acid Scaffold by 3D Printing". Materials 12, n. 18 (7 settembre 2019): 2896. http://dx.doi.org/10.3390/ma12182896.

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Non-powered adaptive systems are attractive in the construction of environment actuators, meteorosensitive architectures, biomedical devices, and soft robotics. Combining hydrophilic materials and anisotropic structures to mimic self-morphing plant structures has been demonstrated as an effective approach to creating artificial hygromorphs. The convenience of 3D printing technologies in shaping programmable complex structures facilitates the imitation of complex anisotropic plant structures. In this research, we constructed a bio-hygromorph using fish swim bladder hydrogel as the hydrophilic material and wood flour-filled polylactic acid (WPLA) scaffold, which was printed with fused deposition modeling (FDM) 3D printing technology (3DP). The environmental benign bio-hygromorph displayed morphing abilities triggered by moisture content changes, as the fish swim bladder hydrogel swelled and shrunk during absorption and desorption cycles. The strain disproportion of the two-layered composite structure in the bio-hygromorph drove the bending deformation. Stress analyses performed with finite element analysis (FEA) also revealed the mechanism behind the moisture content driven morphing of the bio-hygromorph. Notably, the bio-hygromorph exhibited faster response times to moisture absorption than desorption, which may donate actuators’ different attributes in distinct moisture conditions.

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Taccola, Silvia, Francesco Greco, Edoardo Sinibaldi, Alessio Mondini, Barbara Mazzolai e Virgilio Mattoli. "Soft Actuators: Toward a New Generation of Electrically Controllable Hygromorphic Soft Actuators (Adv. Mater. 10/2015)". Advanced Materials 27, n. 10 (marzo 2015): 1637. http://dx.doi.org/10.1002/adma.201570065.

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Ivanova, A. V. "Comparative Characteristics of the Hygromorphic Composition of the Leading Families of Florae of Different Regions of Russia". Chemistry. Biology. Ecology 17, n. 4 (2017): 475–80. http://dx.doi.org/10.18500/1816-9775-2017-17-4-475-480.

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Malmir, Maryam, Rita Serrano, Ahmad Reza Gohari e Olga Silva. "Characterization of Satureja khuzestanica Leaf as a Herbal Medicine". Microscopy and Microanalysis 20, n. 5 (26 agosto 2014): 1425–35. http://dx.doi.org/10.1017/s1431927614013026.

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AbstractDried leaves of Satureja khuzestanica Jamzad are a popular herbal medicine and dental anesthetic among the nomadic inhabitants of southwestern Iran. The present study establishes criteria for identification of S. khuzestanica dried whole, fragmented and powdered leaves for specification as a herbal substance using macroscopic and microscopic characterization. Quantitative microscopy techniques were also considered. Macroscopically leaves exhibit a grayish-green color, are broadly ovate in shape with an acute apex, attenuate base, and ciliate margin and have a surface covered by an indumentum of glandular and non-glandular trichomes. Microscopically leaves have an isobilateral amphistomatic structure containing peltate glandular trichomes consisting of a multiseriate stalk (five cells) and an enlarged secretory head composed of 12 cells, capitate glandular trichomes of variable morphology together with two types of non-glandular trichomes. Oval-shaped hygromorphic diacytic stomata with an adaxial stomatal index of 13.54, collateral vascular bundles consisting of xylem, and three layers of sclerenchymatous tissue close to phloem together with cluster, prismatic and raphide calcium oxalate crystals were also identified as useful pharmacognostic parameters for identification of S. khuzestanica dried leaves.

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Derome, Dominique, Ahmad Rafsanjani, Alessandra Patera, Robert Guyer e Jan Carmeliet. "Hygromorphic behaviour of cellular material: hysteretic swelling and shrinkage of wood probed by phase contrast X-ray tomography". Philosophical Magazine 92, n. 28-30 (18 settembre 2012): 3680–98. http://dx.doi.org/10.1080/14786435.2012.715248.

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Wang, David H., Ruel N. McKenzie, Philip R. Buskohl, Richard A. Vaia e Loon-Seng Tan. "Hygromorphic Polymers: Synthesis, Retro-Michael Reaction, and Humidity-Driven Actuation of Ester–Sulfonyl Polyimides and Thermally Derived Copolyimides". Macromolecules 49, n. 9 (19 aprile 2016): 3286–99. http://dx.doi.org/10.1021/acs.macromol.6b00250.

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Krüger, Friederike, Rebecca Thierer, Yasaman Tahouni, Renate Sachse, Dylan Wood, Achim Menges, Manfred Bischoff e Jürgen Rühe. "Development of a Material Design Space for 4D-Printed Bio-Inspired Hygroscopically Actuated Bilayer Structures with Unequal Effective Layer Widths". Biomimetics 6, n. 4 (6 ottobre 2021): 58. http://dx.doi.org/10.3390/biomimetics6040058.

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(1) Significance of geometry for bio-inspired hygroscopically actuated bilayer structures is well studied and can be used to fine-tune curvatures in many existent material systems. We developed a material design space to find new material combinations that takes into account unequal effective widths of the layers, as commonly used in fused filament fabrication, and deflections under self-weight. (2) For this purpose, we adapted Timoshenko’s model for the curvature of bilayer strips and used an established hygromorphic 4D-printed bilayer system to validate its ability to predict curvatures in various experiments. (3) The combination of curvature evaluation with simple, linear beam deflection calculations leads to an analytical solution space to study influences of Young’s moduli, swelling strains and densities on deflection under self-weight and curvature under hygroscopic swelling. It shows that the choice of the ratio of Young’s moduli can be crucial for achieving a solution that is stable against production errors. (4) Under the assumption of linear material behavior, the presented development of a material design space allows selection or design of a suited material combination for application-specific, bio-inspired bilayer systems with unequal layer widths.

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Mazur, I. "Identification conformity of wetlands biotopes of the Northwest of the Black Sea region". Agroecological journal, n. 3 (30 settembre 2016): 153–59. http://dx.doi.org/10.33730/2077-4893.3.2016.249071.

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This publication presents the analysis of the mostly used international and Ukrainian classification systems for wetland areas performed for identification of different-type marsh biotopes of steppe rivers in the Northwest Black Sea Region. Among the classification systems, the most well-known are the Ramsar Classification System for Wetland Type (1971) and Classification of Wetlands and Deepwater Habitats of the United States (Cowardin et al., 1979). In these systems, valley marsh biotopes are identified as riverine and palustrine, non-tidal, unstable (perennial impounded and seasonal/intermittent) freshwater marshes on mineral rich soils predominantly covered by grasslike plants (rush, reedmace, sedge). The delta marshes of the Danube, Dniester and Dnieper are referred to as tidal brackish and freshwater marshes. According to Ukrainian classification systems for hygromorphic geosystem, marsh biotopes are regarded as mouth wetlands, which is peculiar to delta marsh areas of the Danube and Dnieper interfluve. Thus, riverbed marshes of small and medium-sized rivers are located in other areas and are usually met both in the lower (continuous marsh areas), middle (fragmented marsh mosaic), and upper (coastland) river flow areas, which is caused by an unstable watercourse rate and transforming of their riverbed parts into marsh sections covered by eurytopic wetland species.

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Seelinger, David, Hussam Georges, Jan-Lukas Schäfer, Jasmin Huong, Rena Tajima, Christan Mittelstedt e Markus Biesalski. "Pinecone-Inspired Humidity-Responsive Paper Actuators with Bilayer Structure". Polymers 16, n. 10 (15 maggio 2024): 1402. http://dx.doi.org/10.3390/polym16101402.

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Many plant materials in nature have the ability to change their shape to respond to external stimuli, such as humidity or moisture, to ensure their survival or safe seed release. A well-known example for this phenomenon is the pinecone, which is able to open its scales at low humidity due to the specific bilayer structures of the scale. Inspired by this, we developed a novel humidity-driven actuator based on paper. This was realized by the lamination of untreated paper made from eucalyptus fibers to a paper–carboxymethyl cellulose (CMC) composite. As observed, the hygroexpansion of the composite can be easily controlled by the amount of CMC in the impregnated paper sheet, which, thus, controls the morphologic deformation of the paper bilayer. For a more detailed understanding of these novel paper soft robots, we also studied the dynamic water vapor adsorption, polymer distribution and hygroexpansion of the paper–polymer composites. Finally, we applied a geometrically nonlinear finite element model to predict the bending behavior of paper bilayers and compared the results to experimental data. From this, we conclude that due to the complexity of structure of the paper composite, a universal prediction of the hygromorphic behavior is not a trivial matter.

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Koll, Rebecca A., e William A. DiMichele. "Dominance-diversity architecture of a mixed hygromorphic-to-xeromorphic flora from a botanically rich locality in western equatorial Pangea (lower Permian Emily Irish site, Texas, USA". Palaeogeography, Palaeoclimatology, Palaeoecology 563 (febbraio 2021): 110132. http://dx.doi.org/10.1016/j.palaeo.2020.110132.

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Shitikova, Aleksandra V., Aurel A. Abiala e Anastasia V. Povarnitsyna. "The role of morphological adaptation and variability of potato varieties in plants photosynthetic apparatus formation". IOP Conference Series: Earth and Environmental Science 981, n. 2 (1 febbraio 2022): 022055. http://dx.doi.org/10.1088/1755-1315/981/2/022055.

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Abstract When determining the duration of interphase periods, researchers are faced with a number of difficulties, such as flowering dates absence or delay, a weak correlation between flowering and tuberization, and death of the aboveground part of plants from diseases and pests. In regards to flowering, potatoes are a long-day plant, and according to tuberization - a short one, therefore, photoperiodism significantly affects the development of potato plants. Under conditions of a long day, the normal development of the above-ground plant mass occurs, while a change in photoperiodic conditions until a short day leads to plant’s above cessation growth -ground organs and the onset of enhanced tuberization. The duration of the interfacial periods is influenced by soil and climatic factors, such as heat and moisture supply; under the experimental conditions, the growing season was also determined by varietal characteristics. It should also be noted that the duration of the interphase periods depends on the agrotechnical measures. During the years of research, this indicator varied greatly and had an impact on the yield of the studied varieties. The article presents the results of 3-year studies on the adaptation of potato varieties to changing climatic conditions based on plant architectonics peculiarities research, systematization of new promising potato varieties according to ecological and morphological characteristics, allowing to control crop productivity, is carried out. The most productive in years with contrasting moisture availability were potato varieties, the mid-season variety of the xeromorphic ecomorphic type Kumach (35.7 t/ha), the hygromorphic ultra-early ripening variety Meteor (33.9 t/ha); mesomorphic mid-season varieties Barin (33.9 t/ha) and Resurs (32.3 t/ha). There was a positive correlation between the yield and the atLEAF parameters, the chlorophyll content was higher than the average values for the varieties by 1.8 - 6.2 units.

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Suissa, Jacob S. "Fern fronds that move like pine cones: humidity-driven motion of fertile leaflets governs the timing of spore dispersal in a widespread fern species". Annals of Botany 129, n. 5 (19 novembre 2021): 519–28. http://dx.doi.org/10.1093/aob/mcab137.

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Abstract Background and Aims The sensitive fern, Onoclea sensibilis, is a widespread species in eastern North America and has an atypical timing of spore dispersal among temperate ferns. During early summer, this dimorphic species produces heavily modified spore-bearing fronds with leaflets tightly enveloping their sporangia and spores. These fronds senesce and persist above ground as dead mature structures until the following early spring when the leaflets finally open and spores are dispersed. While this timing of spore dispersal has been observed for over 120 years, the structural mechanisms underpinning this phenology have remained elusive. Methods Based on field observations, growth chamber manipulations and scanning electron microscopy, the mechanisms underlying this distinctive timing of spore dispersal in the sensitive fern were investigated. Key Results I show that fertile leaflets of the sensitive fern move in direct response to changes in humidity, exhibiting structural and functional parallels with multicellular hygromorphic structures in seed plants, such as pine cones. These parallels include differences in cellulose microfibril orientation in cells on the abaxial and adaxial sides of the leaflet. The dynamics of this hygroscopic movement concomitant with regular abscission zones along the pinnules and coordinated senescence lead to the specific timing of early spring spore dispersal in the sensitive fern. Conclusions While hygroscopic movement is common in seed-free plants, it mostly occurs in small structures that are either one or a few cells in size, such as the leptosporangium. Given its multicellular structure and integration across many cells and tissues, the movement and construction of the sensitive fern pinnules are more similar to structures in seed plants. The evolution of this complex trait in the sensitive fern efficiently regulates the timing of spore release, leading to early spring dispersal. This phenology likely gives gametophytes and subsequent sporophytes an advantage with early germination and growth.

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Malenko, Ya, O. Kobriushko e D. Verba. "SPECTRA OF TAXA ECOMORPHIC CAPACITY OF PLANT COMMUNITIES IN TECHNOGENIC ECOTOPES OF KRYVBAS DUMPS". BIOLOGY & ECOLOGY 10, n. 1 (17 giugno 2024): 84–94. http://dx.doi.org/10.33989/2024.10.1.306020.

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The article refers to the relevance of conducting comprehensive studies of plant communities’ composition of dumps’ technogenic ecotopes as an initial stage in learning the structure, specifics of conditions and trends in developing vegetation of disturbed lands. The expediency of detailing the ecomorphic capacity of various taxa based on the theory of ecological and taxonomic spectra is noted to establish ecological, adaptive potential, inherent and realized by each taxon. Research conducted within the dumps «2-3» of PJSC «ArcelorMittal Kryvyi Rih» allowed to record 184 species of angiosperms belonging to 132 genera and 35 families. Analysis of the constructed ecomorphic capacity spectra of taxa (classes, families) indicates their unequal ecomorphic capacity.The ecomorphic capacity of Magnoliopsida is larger than that of Liliopsida. The predominant part of the Magnoliopsida ecomorphic capacity spectrabelongs to ruderants, ruderal stepants and stepants, xeromesophytes and mesoxerophytes, heliophytes, hemicryptophytes and therophytes, and mesotrophs.Stepants, ruderants, xeromesophytes, heliophytes, therophytes,cryptophytes, and mesotrophs dominate in the Liliopsida ecomorphic capacity spectra. The cenomorphic capacity spectra of the families Asteraceae, Fabaceae, Poaceae, Caryophyllaceae, Apiaceae are expanded and contain the most different cenomorphs when the spectra of the cenomorphic capacity of 15 families are narrowed and monotypic in terms of the composition of cenomorphs. The extended hygromorphic capacity spectra are characteristic of Poaceae, Asteraceae, Caryophyllaceae, Brassicaceae, Fabaceae, Chenopodiaceae, and Scrophulariaceae; heliomorphic capacity spectra – of Lamiaceae, Rosaceae, Apiaceae; climamorphic capacity spectra – of Asteraceae, Fabaceae, Lamiaceae, Brassicaceae, Chenopodiaceae, Poaceae, Caryophyllaceae; trophomorphic capacity spectra – of Asteraceae, Poaceae, Fabaceae, Lamiaceae, Caryophyllaceae, Euphorbiaceae. The approach of plant communities to a more or less stable state is accompanied by reduction and relative stabilization in the composition of ecomorphic spectra and taxa capacity. Identical changes in the ecomorphic capacity of taxa on dumps that have a certain similarity in ecological conditions, substrate characteristics,and storage age can be used as diagnostic indicators of the stages of zonal restoration of vegetation cover on disturbed lands.

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31

Reyssat, E., e L. Mahadevan. "Hygromorphs: from pine cones to biomimetic bilayers". Journal of The Royal Society Interface 6, n. 39 (luglio 2009): 951–57. http://dx.doi.org/10.1098/rsif.2009.0184.

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We consider natural and artificial hygromorphs, objects that respond to environmental humidity by changing their shape. Using the pine cone as an example that opens when dried and closes when wet, we quantify the geometry, mechanics and dynamics of closure and opening at the cell, tissue and organ levels, building on our prior structural knowledge. A simple scaling theory allows us to quantify the hysteretic dynamics of opening and closing. We also show how simple bilayer hygromorphs of paper and polymer show similar behaviour that can be quantified via a theory which couples fluid transport in a porous medium and evaporative flux to mechanics and geometry. Our work unifies varied observations of natural hygromorphs and suggests interesting biomimetic analogues, which we illustrate using an artificial flower with a controllable blooming and closing response.

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32

Savosko, V. M. "The dynamics of the dendroflora ecomorphic and biomorphic spectra at the former Botanic garden of the Kryvyi Rih state educational institute". Ecology and Noospherology 25, n. 1-2 (27 agosto 2012): 37–45. http://dx.doi.org/10.15421/031404.

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Abstract (sommario):

The aim of the work is to identify the features of the temporal dynamics of the ecomorphic and biomorphic spectra at the former Botanic Garden of the Kryvyi Rih State Educational Institute. It was found that on 01.10. 2011 in the plantations of the former Botanical Garden 47 species of trees, shrubs and lianas had grown. In the composition of the dendroflora only five species of gymnosperms and 42 species of angiosperms had been revealed. Leading families were Rosaceae, Fabaceae and Salicaceae and Aceraceae. The dominant genera were Acer and Populus. For the last 40 years, 99 species, 46 genera and 10 families from the collection had been dropped out. At the same time, the Botanical Garden was the only habitat of unique species such as Metasequoia glyptostroboides, Celtis australis, Securinega suffruticosa, Cercis siliquastrum, Indigofera gerardiana, Kerria japonica, Koelreuteria paniculata, Xanthoceras sorbifolium, Schisandra chinensis. At present the scientific collections in our region are lacking in these species. Since that time, the dendroflora’s trofomorphic spectrum of the former Botanical Garden had undergone some changes. The first thing to note is an increase in the proportion of mehatrophes: from 15.5 % in 1966 – up to 25.5 % in 2006 (1.6 times). At the same time the total proportion of olihotrophes and olihomezotrophes had been reduced: from 26.4 % in 1966 to 14.9 % in 2006 (1.8 times). Despite the lack of a clear trend towards changing the proportion of mezotrophes, they are consistently the most common woody plants of the Botanic Gardens. Age-related changes of the dendroflora’s hygromorphic spectrum of the former Botanical Garden have such directions: the proportion of xerophytes decreased in 1.9 times and mezohygrophytes in 2.4 times. However, there has been an increase in the relative number of mezophytes (1.1 times), mezokserophytes (1.2 times) and hygromezophytes (1.6 times). Over the time the dendroflora’s heliomorhic spectrum had the following changes from the former Botanical Garden: despite the decrease in the proportion of heliophytes (from 58.8 % in 1966 to 53.2 % in 2006), they remained the largest group of the spectrum. At the same time it was revealed an increase of scioheliophytes in 1.4 times, and overall reduction of heliosciophytes and sciophytes in the number and proportion. In the plantations of the Botanic Gardens it has been established a tendency of the introduced species reduction and of the native species increase. However, this has not changed the overall pattern – the dominance of the introduced species, both trees and shrubs. On the whole the conditions of the region are the most adapted for megatrophes plants, mesophytes and heliophytes and trees. The basis of the collection consists of introduced species from the Atlantic-North American, East Asian and Tsimkumboreal floristic regions.

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33

Tomic, Zagorka, e Nikola Jovic. "Recent succession of the pedunculate oak and narrow-leaved ash forest in the unflooded part of Gornji Srem". Bulletin of the Faculty of Forestry, n. 85 (2002): 101–12. http://dx.doi.org/10.2298/gsf0285101t.

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Abstract (sommario):

In the unflooded part of the river Sava, Bosut and Studva bottom lands in Gornji Srem (forest sections Morovi? and Visnji?evo), the following succession series are clearly differentiated on large areas: forests of narrow-leaved ash (Fraxinetum angustifoliae Jov. et Tom.1979. s.l) on ((/(-(/(-gley ( forests of pedunculate oak and narrow-leaved ash (Fraxino-Quercetum roboris Jov. et Tom.1979. s.l) on humogley, humosemigley and semigley ( forests of pedunculate oak, hornbeam and ash (Carpino-Fraxino-Quercetum roboris Jov. et Tom. 1979, s.l) on semigley, brown forest soil and soil lessive Forest of pedunculate oak and narrow-leaved ash, which is an intermediary stage of the ecological succession series, is also differentiated into three ecological units (subassociations), which are the developmental phases of the association - primary, optimal and terminal ? Forest of pedunculate oak and ash with hygrophilic accessories (Fraxino-Quercetum roboris hygrophyllum) on moderately moist hydromorphic black soils (humogley, ecological (-gley) is the primary phase, ecologically and syn-dynamically related to the terminal phase of the previous stage ? forest of narrow-leaved ash with sedge (Fraxinetum angustifoliae caricetosum remotae) on (/(-gley. The dominant edificator is narrow-leaved ash, while pedunculate oak is in the subdominant position Moister meadow black soils are characterised by intensive moisture, because already at the depth of 20/30-50 cm, the process of gleying occurs. Underground water stagnates at the depth of 80-120 cm ? Typical forest of pedunculate oak and ash (Fraxino-Quercetum roboris typicum) on the drier varieties of humosemigley is the optimal phase in the development of the association, with a slowed down dynamism. Both edificators are in their ecological and coenological optima, i.e. the conditions of their development are excellent In the drier hygromorphic black soils the level of underground water is about 40 cm lower than the moister variety, so that the stagnating underground water occurs at the depth of 120-160 cm. However, thanks to capillary rise, the tree root system has abundant moisture. Simultaneously, the physical properties of the soil are more favourable, so the ecological productivity potential is very high ? Forest of pedunculate oak and ash with field maple and Tartar maple (Fraxino-Quercetum roboris aceretosom) on semigleys is the terminal phase, syn-dynamically and spatially related to the following phase ? forest of pedunculate oak, hornbeam and ash with sedge (Carpino-Fraxino-Quercetum roboris caricetosum remotae) on semigleys to semigleys lessive in the unflooded zone. Pedunculate oak undertakes the role of the dominant edificator, while ash is retreating The depth of the stagnating ground water is 150/160-200 cm and the soils are significantly lighter, so that capillary rise is twice as difficult. This is not unfavourable to pedunculate oak, which reaches its ecological optimum even in the less moist communities with hornbeam in the terrestrial conditions, but it hinders the development of the more hygrophilic narrow-leaved ash and thus accelerates the syn-dynamic processes of the transition to the following, drier stage The study of the dynamism of pedunculate oak and narrow-leaved ash forests, one of the most widely distributed and most productive ecosystems in Gornji Srem, should direct, advance and facilitate the carrying out of all operations on its enhancement.

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34

Le Duigou, Antoine, Samuel Requile, Johnny Beaugrand, Fabrizio Scarpa e Mickael Castro. "Natural fibres actuators for smart bio-inspired hygromorph biocomposites". Smart Materials and Structures 26, n. 12 (1 novembre 2017): 125009. http://dx.doi.org/10.1088/1361-665x/aa9410.

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35

Le Duigou, Antoine, Vincent Keryvin, Johnny Beaugrand, Miguel Pernes, Fabrizio Scarpa e Mickael Castro. "Humidity responsive actuation of bioinspired hygromorph biocomposites (HBC) for adaptive structures". Composites Part A: Applied Science and Manufacturing 116 (gennaio 2019): 36–45. http://dx.doi.org/10.1016/j.compositesa.2018.10.018.

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36

Kalashnikova, L. V., e J. V. Doroshenko. "Ecological characteristic of dendrosozophytеs of the dendrological park «Oleksandria» of NAS of Ukraine". Journal of Native and Alien Plant Studies, n. 1 (28 dicembre 2021): 119–24. http://dx.doi.org/10.37555/2707-3114.1.2021.247561.

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Abstract (sommario):

The ecological characteristics of 159 dendrosozophytes of the dendrological park «Olexandria» are given: 61 of the Pinophyta division, 98 of the Magnoliophyta division; the sozological status is determined according to the latest in- ternational, state, and regional data. In addition, ecomorphs of plants were considered as specific displays of their adaptation to certain discrete abiotic factors of the ecotope. According to the ecological analysis, it was found that the dendrososophytes of the dendrological park are represented by 7 hygromorphs, among which mesophytes predominate (77 species — 49%), which are confined to moderately humid and arid ecotopes of Drymo-, Thamno- and Anthropogenophyton. In general, the rarity component is dominated by mezophilic heliophytic microthermophytic, and mezotrophic phanerophytes.

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37

Le Duigou, Antoine, e Mickael Castro. "Hygromorph BioComposites: Effect of fibre content and interfacial strength on the actuation performances". Industrial Crops and Products 99 (maggio 2017): 142–49. http://dx.doi.org/10.1016/j.indcrop.2017.02.004.

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38

Alexander, Symone L. M., e LaShanda T. J. Korley. "Tunable hygromorphism: structural implications of low molecular weight gels and electrospun nanofibers in bilayer composites". Soft Matter 13, n. 1 (2017): 283–91. http://dx.doi.org/10.1039/c6sm00749j.

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39

Le Duigou, A., T. Fruleux, R. Matsuzaki, G. Chabaud, M. Ueda e M. Castro. "4D printing of continuous flax-fibre based shape-changing hygromorph biocomposites: Towards sustainable metamaterials". Materials & Design 211 (dicembre 2021): 110158. http://dx.doi.org/10.1016/j.matdes.2021.110158.

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40

Sadat, Tarik. "Machine Learning-Assisted Tensile Modulus Prediction for Flax Fiber/Shape Memory Epoxy Hygromorph Composites". Applied Mechanics 4, n. 2 (9 giugno 2023): 752–62. http://dx.doi.org/10.3390/applmech4020038.

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Abstract (sommario):

Flax fiber/shape memory epoxy hygromorph composites are a promising area of research in the field of biocomposites. This paper focuses on the tensile modulus of these composites and investigates how it is affected by factors such as fiber orientation (0° and 90°), temperature (20 °C, 40 °C, 60 °C, 80 °C, and 100 °C), and humidity (50% and fully immersed) conditions. Machine learning algorithms were utilized to predict the tensile modulus based on non-linearly dependent initial variables. Both decision tree (DT) and random forest (RF) algorithms were employed to analyze the data, and the results showed high coefficient of determination R2 values of 0.94 and 0.95, respectively. These findings demonstrate the effectiveness of machine learning in analyzing large datasets of mechanical properties in biocomposites. Moreover, the study revealed that the orientation of the flax fibers had the greatest impact on the tensile modulus value (with feature importance of 0.598 and 0.605 for the DT and RF models, respectively), indicating that it is a crucial factor to consider when designing these materials.

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41

Kunakh, O. N., S. S. Kramarenko, A. V. Zhukov, G. A. Zadorozhnaya e A. S. Kramarenko. "Intra-population spatial structure of the land snail Vallonia pulchella (Müller, 1774) (Gastropoda; Pulmonata; Valloniidae)". Ruthenica, Russian Malacological Journal 28, n. 3 (16 agosto 2018): 91–99. http://dx.doi.org/10.35885/ruthenica.2018.28(3).1.

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Abstract (sommario):

This paper summarizes the mechanisms behind the patterning of the intra-population spatial arrangement of the land snail Vallonia pulchella in terms of edaphic and vegetation properties. The molluscs were collected from a regular grid in recultivated soil (the research station of Dnipro State Agrarian and Economic University, Pokrov, Ukraine). As predictors of the snail population abundance, spatial variables were used, as well as edaphic and vegetation indices. It is shown that V. pulchella prefers microsites characterized by higher soil electrical conductivity, which contain larger aggregate fractions with low mechanical impedance and the low temperature at the depth of 0-10 cm, with a more developed dead plant layer, low-light and low hygromorph and heliomorph index values of the vegetation.

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42

Tahouni, Yasaman, Friederike Krüger, Simon Poppinga, Dylan Wood, Matthias Pfaff, Jürgen Rühe, Thomas Speck e Achim Menges. "Programming sequential motion steps in 4D-printed hygromorphs by architected mesostructure and differential hygro-responsiveness". Bioinspiration & Biomimetics 16, n. 5 (21 luglio 2021): 055002. http://dx.doi.org/10.1088/1748-3190/ac0c8e.

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43

de Kergariou, Charles, Antoine Le Duigou, Adam Perriman e Fabrizio Scarpa. "Design space and manufacturing of programmable 4D printed continuous flax fibre polylactic acid composite hygromorphs". Materials & Design 225 (gennaio 2023): 111472. http://dx.doi.org/10.1016/j.matdes.2022.111472.

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44

Correa, David, Simon Poppinga, Max D. Mylo, Anna S. Westermeier, Bernd Bruchmann, Achim Menges e Thomas Speck. "4D pine scale: biomimetic 4D printed autonomous scale and flap structures capable of multi-phase movement". Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 378, n. 2167 (3 febbraio 2020): 20190445. http://dx.doi.org/10.1098/rsta.2019.0445.

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Abstract (sommario):

We developed biomimetic hygro-responsive composite polymer scales inspired by the reversible shape-changes of Bhutan pine ( Pinus wallichiana ) cone seed scales. The synthetic kinematic response is made possible through novel four-dimensional (4D) printing techniques with anisotropic material use, namely copolymers with embedded cellulose fibrils and ABS polymer. Multi-phase motion like the subsequent transversal and longitudinal bending deformation during desiccation of a natural pinecone scale can be structurally programmed into such printed hygromorphs. Both the natural concept generator (Bhutan pinecone scale) and the biomimetic technical structure (4D printed scale) were comparatively investigated as to their displacement and strain over time via three-dimensional digital image correlation methods. Our bioinspired prototypes can be the basis for tailored autonomous and self-sufficient flap and scale structures performing complex consecutive motions for technical applications, e.g. in architecture and soft robotics. This article is part of the theme issue ‘Bioinspired materials and surfaces for green science and technology (part 3)’.

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45

Hapon, S., e Y. Hapon. "BRYOPHYTE COMPONENT OF MEADOW PHYTOCOENOSES IN THE ROMENSKO-POLTAVA GEOBOTANICAL DISTRICT". BIOLOGY & ECOLOGY 8, n. 2 (12 dicembre 2022): 10–17. http://dx.doi.org/10.33989/2022.8.2.285299.

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Abstract (sommario):

The bryophyte component of the meadow phytocoenoses of the Romensko-Poltava geobotanical district is characterized in this study. The research revealed that the meadow phytocoenoses of Ukraine consist of 39 species of mosses, belonging to two divisions, three classes, six orders, 14 families, and 26 genera. The division Marchantiophyta is represented by one class, one order, two families, and two genera. The division Bryophyta is represented by two classes, five orders, 12 families, 24 genera, and 36 species. The richest families in terms of species diversity are Amblystegiaceae and Pottiaceae (each containing six species), and Plagiomniaceae (with five species). The genera in the bryoflora spectrum are predominantly monospecific or bispecific. Only two genera, Brachythecium and Plagiomnium, are represented by five species each. The meadow bryoflora is characterized by the prevalence of species with life forms such as low cushions, tall cushions, and mats. The ecological-biological structure of the bryoflora is characterized by the dominance of shade-tolerant mosses and heliophytes. Among hygromorphs, hygromesophytes and mesophytes prevail, while among trophomorphs, mesotrophs, mesoeutrophs, and eutrophs are dominant.

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46

Golovlyov, Aleksey Alekseevich, Yulia Vladimirovna Makarova e Nataliya Vladimirovna Prokhorova. "Bioecological analysis of Mountain Kuznetsov vascular plants". Samara Journal of Science 7, n. 1 (1 marzo 2018): 28–31. http://dx.doi.org/10.17816/snv201871104.

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Abstract (sommario):

According to the vegetation duration the vascular plants grow on Kuznetsov Mountain form such groups as: summer vegetative species (216 species, 80,9%), summer-winter-green species (44 species, 16,5%), evergreen, spring-green, spring-early-summer-green (2 species, 0,7% each) and summer-green or summer-winter-green vascular plants (1 species, 0,4%). Depending on the pollination ways the entomophillic plants prevail (206 species, 77,1%), whereas anemophiles (40 species, 15,0%), self-polinated (3 species, 1,1%) and species combining entomophilia with self-pollination (8 species, 3,0%), entomophilia with anemophilia (1 species, 0,4% %) are also presented. According to spreading seeds ways the species form the following descending series: diplohories and polychories (79 species, 29,6%) ballists, anemochores (55 species, 20,6% each) zoochores (31 species, 11,6%) barochores (29 species, 10,8%) automechanochores (8 species, 3,0%) hydrochores (1 species, 0,4%). Depending on the ecomorph structure of vegetation, the cenomorphs descending row includes: silvants (75 species, 28,1%), pratants (48 species, 18,0%) and ruderants (46 species, 17,2%), the same for trophomorphs - mesotrophs (154 species, 57,7%), among the hygromorphs - mesophytes (98 species, 36,8%) and xeromesophytes (58 species, 21,7%), among heliomorphs - heliophytes (152 species, 56,9%) and scioheliophytes (66 species, 24,7%), among the thermomorphs - mesotherms (195 species, 73,0%).

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Matveeva, Tatyana Borisovna, Ivan Victorovich Kazantsev e Sergey Lvovich Molchatsky. "Ecomorfs analysis of the Samara flora". Samara Journal of Science 8, n. 2 (1 aprile 2019): 28–32. http://dx.doi.org/10.17816/snv201982105.

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Abstract (sommario):

During the conducted research it is revealed that suburban forests of Samara experience a considerable anthropogenic load. It is connected with the increase of the country site area, unauthorized building of the territory, deforestation, recreational loading. For the allocated associations the analysis of ecomorphs of flora is carried out. All species on coenomorphes, hygromorphes and trophomorphes are distributed. On the basis of the obtained data primary distribution of elements of flora was established. The main consequences of anthropogenic transformation are also revealed. It is possible to conclude that the structure of herbage of Samara suburban forests changes in the process of anthropogenic loading increase. It is reflected in ruderants, xeromesophytes and mesoxerophytes increase. It is not peculiar for forest communities. On the basis of the obtained data it is possible to define a disturbance degree of a vegetable cover under the anthropogenic influence. It is revealed that in suburban forests of Samara, despite high appeal and comfort, the vital condition of forest stands of an oak is weakened. It is necessary to carry out a complex of forestry and landscape actions for optimization of recreational forest exploitation that will improve a condition of forest plants and increase their stability in the conditions of anthropogenic loading. These materials can form a basis for a further study of the flora of the area.

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48

Zhukov, A. V., e D. B. Shatalin. "ГИГРОТОП И ТРОФОТОП БИОГЕОЦЕНОЗОВ СТЕПНОГО ПРИДНЕПРОВЬЯ КАК ДЕТЕРМИНАНТЫ β-РАЗНООБРАЗИЯ СООБЩЕСТВ ДОЖДЕВЫХ ЧЕРВЕЙ (LUMBRICIDAE)". Biological Bulletin of Bogdan Chmelnitskiy Melitopol State Pedagogical University 6, n. 2 (31 agosto 2016): 188–222. http://dx.doi.org/10.15421/201651.

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The role of the hygrotope and trophotope of the steppe Pridniprovie biogeoceonosis has been discussed in present article as being determinants of the β-diversity of earthworms (Lumbricidae) communities. Material has been colected to the period 1997-2015. 180 sample polygons have been studied which located in various types of biogeoceonosis. Biogeoceonotic characteristic of the sample polygons have been made on the basis of professor A.L. Belgard forest typology of a steppe zone of Ukraine. Earthworm communities of the steppe Pridniprovie have been established to be presented by 16 species. Hygrotopes, trophotopes and bitope ceonosis features have been shown to be able to explain 72.4 % of a communities’ abundance variation and 73.7 of their % α-diversity by means of second order model. Earthworm communities’ abundance reache their maximum values at a combination of conditions of humidity from hygromesophilous to hygrophilous and conditions of edaphotope trophicity from Dc (linden oakwood) to Dn (elm-ashen oakwood and alder forests). The maximum diversity of earthworm communities has been stated to be characteristic for a combination of mesohygrophilous conditions and a trophicity mode Dc, that there corresponds to forest type a linden oakwood with aegopodium. The coenomorphic structure of the biogeocoenosis is statistically significant predictors of both abundance and α-diversity of earthworm communities. Earthworm communities of marsh monocoenosis, meadow-steppe amphicoenosis and steppe monocoenosis have been found as being characterised by minimum abundance and diversity. Moderate level abundance and diversity are characteristic for meadow-forest amphicoenosis, forest pseudomonocoenosis with elements of transformation to steppe and forest-steppe amphicoenosis. High levels of these indexes are typical for forest monocoenosis. Given other conditions of humidity and edaphotope trophicity being equal in forest monocoenosis abundance and diversity of earthworm communities will be higher than in other biogeocoenosis types. The MDM-analysis (Multinomial Diversity Model) reveals that habitats coenotic features define 12.61 % of all entropy of earthworm communities, hygrotopes – 24.12 %, trophotopes – 12.3 %. The square-law hygrotope member defines 10.93 %, and trophotope – 2.05 %. Hygrotope and trophotope interaction defines 1.53 % of entropy of earthworm communities. Sites (α -diversity) define 36.45 % of entropy. There are other factors which influence a diversity of earthworm communities besides a humidity, trophicity and habitat coenotic features. Steppe Pridniprovie earthworm complexes have been divided into ecological groups on the basis of relation to humidity (hygromorphes) and to edaphotope trophicity (trophocenomorphes). Earthworms hygromorphes are presented by xerophylous (2 species), mesophylous (9 species), hygrophylous (4 species), ultrahygrophylous (1 species). Trophocoenomorphes are presented by oligotrophocoenomorphes (1 species), oligomesotrophocoenomorphes (4 species), mesotrophocoenomorphes (9 species), megatrophocoenomorphes (2 species).

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49

Samokhvalov, Konstantin Vitalyevich, Aleksandr Petrovich Arsentiev e Evgeny Arkadievich Sinichkin. "A geographical analysis of the dendroflora of Cheboksary in the greening system of the city". Samara Journal of Science 11, n. 4 (1 dicembre 2022): 115–20. http://dx.doi.org/10.55355/snv2022114117.

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The paper presents the results of the geographical analysis of the dendroflora of Cheboksary. The landscaping system of Cheboksary is represented mainly by woody vegetation, which grows in public areas, in limited-use plantings, as well as along the streets and main highways of Cheboksary. Woody vegetation is represented by 73 species, which, according to the generally accepted systematics of plants, belong to 43 genera and 20 families. The geographical analysis of the dendroflora of Cheboksary is based on archaeological data from various reports. In the dendroflora of Cheboksary, 7 groups of the area have been identified, depending on their natural distribution: 1) aboriginal group, 2) cultural group, 3) hybrid group, 4) North American group, 5) East Asian group, 6) Mediterranean group, 7) European group. The dendroflora of Cheboksary is dominated by introducents, which account for 44 species. The most numerous of the introducers is the East Asian group, which makes up 41% of the total, the North American and European groups 25% each, the Mediterranean group 9%. The geographical composition of the dendroflora, depending on the element of the system of green spaces, showed that the largest number of introducers were identified in public plantings, which were represented by 40 species of trees and shrubs, in limiteduse plantings 29 species, along streets and main roads 28 species. The analysis of the dendroflora by the ratio of hygromorphs has revealed that mesophytes predominate in the dendroflora of Cheboksary 54,7%, xerophytes 17,8%, mesoxerophytes 12,3%.

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50

Keropyan, A. A., M. V. Nagalevsky, O. V. Bukareva e T. G. Yanenko. "Rare and endangered plant species of the Kuban State University Botanical Garden". Проблемы ботаники Южной Сибири и Монголии 22, n. 2 (4 dicembre 2023): 122–26. http://dx.doi.org/10.14258/pbssm.2023111.

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Abstract (sommario):

The paper presents the results of research on rare and endangered plant species growing on the territory of the Educational Botanical Garden of the Kuban State University. A systematic list of 88 plant species from 62 genera and 40 families listed in the regional Red Book has been compiled. A taxonomic analysis was carried out showing the predominant families, as well as the distribution of the studied flora into monotypic, oligotypic and polytypic families. The analysis of life forms according to the I. G. Serebryakov system showed that perennial grasses predominate, the smallest number of species refers to annual grasses. Ecological analysis was carried out on two groups of ecomorphs: in relation to light and moisture. Among the heliomorphs, heliophytes predominate. Xerophytes predominate among hygromorphs. According to the data of the zoological analysis, it was revealed that out of 88 species of the collection of rare and endangered plants of the Kuban State University Botanical Garden, 34 species are listed in the Red Book of the Russian Federation. The zoological characteristics of the studied flora of the KubGU Botanical Garden are given. In order to identify changes in the state of flora, as well as clarity of replenishment of the collection of the Educational Botanical Garden of the Kuban State University, a comparative characteristic of changes in the categories of plant species growing on the territory of the Educational Botanical Garden in the period from 1994 to 2017 was carried out.

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