scholarly journals Rare plants of the mountains of southern Siberia in the collection Polar Alpine Botanical Garden

2020 ◽  
Vol 19 (1) ◽  
pp. 264-268
Author(s):  
L. L. Viracheva
Keyword(s):  
Conservation Status ◽  
Botanical Garden ◽  
Rare Plants ◽  
Field Trips ◽  
The Arctic ◽  
Southern Siberia ◽  
Threatened Taxa ◽  
Rare And Endangered ◽  
Viable Seeds ◽  
Mountains Of Southern Siberia

In the Polar-Alpine Botanical Garden (67o38′N and 33o37′E) plants of the mountains of Southern Siberiahave been tested since 1934 (Altai) and 1936 (Sayan Mountains). Plants obtained from field trips to that areas. Theanalysis of the existing diversity of rare and endangered plants from the mountains of Southern Siberia in the open groundcollection of the Polar-Alpine Botanical Garden is carried out. Currently, the collection of rare plants of the mountains ofSouthern Siberia totals 18 species belonging to 14 genera of 12 families. Four species are included in the Red Book of theRussian Federation: Allium altaicum, Erythronium sibiricum, Fritillaria dagana, Rheum compactum. Three plants in needof protection are included in the Red List of Threatened Taxa of the International Union for Conservation of Nature: –Species in close to threatened status (conservation status NT): Allium altaicum; – Least Concerned Species (conservationstatus LC): Allium ledebourianum, Paeonia anomala. All studied species in the conditions of the Arctic annually bloomand are able to produce viable seeds. The group of plants reaching the fruiting phase is very heterogeneous:– bear fruitannually: Allium altaicum, Sedum roseum, Erythronium sibiricum, Callianthemum sajanense; – bear fruit almost annually:Allium ledebourianum, Stemmacantha carthamoides, Iris bloudowii, Iris sibirica, Paeonia anomala, Primula elatior ssp.pallasii, Primula veris ssp. macrocalyx; – bear fruit irregularly: Iris humilis, Rheum altaicum, Adonis apennina; – rarelybear fruit: Brunnera sibirica, Gentiana dschungarica, Hemerocallis lilio-asphodelus, Fritillaria dagana.

scholarly journals Some results of the introduction of useful plants of the flora of Siberia in the North-West of Russia

2021 ◽  
Vol 20 (1) ◽  
pp. 345-351
Author(s):  
I. A. Pautova
Keyword(s):  
Life Expectancy ◽  
Botanical Garden ◽  
Useful Plants ◽  
Southern Siberia ◽  
North West ◽  
The North ◽  
Resistant Species ◽  
Peter The Great ◽  
Rare And Endangered ◽  
Introduction Experiment

Some results of cultivation of Siberian flora species in culture at the introduction nursery of useful plantsof the Peter the Great Botanical Garden of the BIN RAS, in St. Petersburg have been summed up. All species are classifiedaccording to biological resistance. The analysis of the introduction resistance of plants in Siberia showed that 83.3 % ofthe species adapted well to the new conditions of existence. According to the duration of the introduction experiment,all plants were divided into 5 groups. 37 % falls on the group of species, the life expectancy of which is more than 60years. 45 species of rare and endangered flora of Southern Siberia, grown in culture, have been identified, most of themcan be attributed to resistant (46.7 %) and highly resistant species (31.1 %). The maximum age of these plants in theexperiment reaches 68–84 years. The data obtained can be used to preserve and enrich regional flora and prepare materialfor repatriation work.

Rarity, taxonomy and genetics: the chequered history of Grevillea williamsonii (Proteaceae)

2018 ◽  
Vol 24 (3) ◽  
pp. 329
Author(s):  
Elizabeth A. James ◽  
Gillian K. Brown ◽  
Rebecca Jordan ◽  
Daniel J. Ohlsen
Keyword(s):  
Dna Sequences ◽  
Conservation Status ◽  
Taxonomic Status ◽  
Haplotype Network ◽  
Common Species ◽  
Rare Plants ◽  
Threatened Taxa ◽  
History Of ◽  
Nuclear Microsatellite ◽  
Chloroplast Dna Sequences

Resolving uncertainty surrounding the taxonomic and conservation status of rare plants is of utmost importance to enable effective allocation of the limited resources available for conserving biodiversity. Prioritising threatened taxa that are more appropriately regarded as synonymous with more common species represents a waste of resources. Such a scenario may apply to the Australian entity Grevillea williamsonii and consequently its taxonomic status was investigated using chloroplast DNA sequences and nuclear microsatellite data. Haplotype network and genetic structure analyses showed that G. williamsonii was not genetically distinct from, and should be synonymised with, the variable and morphologically similar but more common G. aquifolium. This study highlights the benefit of undertaking genetic analyses where questionable taxonomic status biases conservation prioritisation and management decisions.

scholarly journals Biodiversity Conservation in Botanical Gardens: The Collection of Pinaceae Representatives in the Greenhouses of Peter the Great Botanical Garden (BIN RAN)

2019 ◽  
Author(s):  
E M Arnautova ◽  
M A Yaroslavceva
Keyword(s):  
Biodiversity Conservation ◽  
Conservation Status ◽  
Botanical Garden ◽  
Short Description ◽  
Endangered Plants ◽  
Natural Habitats ◽  
Botanical Gardens ◽  
Peter The Great ◽  
Rare And Endangered

The work researches the role of botanical gardens in biodiversity conservation. It cites the total number of rare and endangered plants in the greenhouse collection of Peter the Great Botanical garden (BIN RAN). The greenhouse collection of Pinaceae representatives has been analysed, provided with a short description of family, genus and certain species, presented in the collection. The article highlights the importance of Pinaceae for various industries, decorative value of plants of this group, the worth of the pinaceous as having environment-improving properties. In the greenhouses there are 37 species of Pinaceae, of 7 geni, all species have a conservation status: CR – 2 species, EN – 3 species, VU- 3 species, NT – 4 species, LC – 25 species. For most species it is indicated what causes depletion. Most often it is the destruction of natural habitats, uncontrolled clearance, insect invasion and diseases.

scholarly journals Co-occurring cryptic species pose challenges for conservation: a case study of the African dwarf crocodile (Osteolaemusspp.) in Cameroon

Oryx ◽  
2014 ◽  
Vol 49 (4) ◽  
pp. 584-590 ◽  
Author(s):  
Nicole L. Smolensky
Keyword(s):  
Cryptic Species ◽  
Conservation Status ◽  
Taxonomic Revision ◽  
Single Species ◽  
Conservation Strategies ◽  
Encounter Rates ◽  
Distribution Maps ◽  
Species Complexes ◽  
Threatened Taxa ◽  
Population Structures

AbstractThe conservation status of threatened taxa may be obfuscated by the detection of cryptic species complexes, in both vertebrate and invertebrate species. African dwarf crocodiles (Osteolaemusspp.) are hunted throughout their range but their conservation status is unknown. Few population assessments have been carried out and there has been a taxonomic revision of the number of species in the genus. The similar morphologies ofOsteolaemus tetraspisandOsteolaemus osbornipose a challenge for conservation in Cameroon, where they are still managed as a single species. Nocturnal spotlight surveys were conducted in three regions during August–November 2010 and December 2011–February 2012 to provide population assessments ofO. tetraspisandO. osborniand raise awareness of the two species in Cameroon. The mean encounter rates ofO. tetraspisandO. osborniwere 1.02 ± SD 1.34 (65 individuals in 39 surveys) and 0.61 ± SD 0.38 (three in four surveys) crocodiles per km, respectively. TheO. tetraspispopulation comprised juveniles predominantly and had a male-biased sex ratio. The fewO. osbornidetected comprised both adults and juveniles. Both species are threatened in Cameroon, based on low encounter rates, young population structures and the threats of habitat loss and hunting pressure. This study provides distribution maps and serves as a baseline to quantify population trends and inform conservation strategies.

scholarly journals Features of the water regime of aboriginal and introduced species of the genus Iris L. in the Southern Ural

2021 ◽  
Vol 210 (07) ◽  
pp. 2-15
Author(s):  
Liliya Beksheneva ◽  
Antonina Reut
Keyword(s):  
Introduced Species ◽  
Water Scarcity ◽  
Native Species ◽  
Water Regime ◽  
Meteorological Factors ◽  
Botanical Garden ◽  
Mode I ◽  
Native Flora ◽  
Rare And Endangered Species ◽  
Rare And Endangered

Abstract. The article presents the results of an experimental assessment of the peculiarities of the water regime of 9 species of the genus Iris L. growing in the South-Ural Botanical Garden-Institute UFRC RAS (I. sibirica L., I. pseudacorus L. ‒ species of native flora, I. aphylla L., I. biglumis Vahl., I. lacteal Pall., I. orientalis Mill., I. ruthenica Ker-Gawl., I. setosa Pall., I. spuria L. ‒ introduced species). The purpose is a comparative evaluation of the main parameters of the water regime within the generic complex and depending on the detection of meteorological factors in different phenological periods. Methods. Studies were performed in growing periods 2019–2020’s physiological using conventional techniques (artificial saturation method and wilting). Made a detailed analysis of daily and seasonal dynamics of the water regime of the three parameters: the total water content, water-holding capacity, water scarcity. Typical forest species Convallaria majalis L. was investigated for a comparative analysis of water regime indicators. Results. The similarities and differences in the peculiarities of the water regime were established between the studied species, the dependence of the indicators on meteorological conditions was revealed. According to the type of water regime cultivars were divided into four groups: a flexible water-quiet mode ‒ I. pseudacorus, flexible water-tight mode ‒ I. sibirica, I. ruthenica, stably-calm water mode ‒ I. aphylla, I. biglumis, I. setosa, stably-tight water mode ‒ I. spuria, I. lactea, I. orientalis. Among the studied parameters of water scarcity was the most dependent on meteorological factors. Scientific novelty. The study helps to identify ecological and physiological adaptations of exotic species in comparison with the native species that could become the basis for assessing the prospects of growing in the culture and conservation of rare and endangered species.

scholarly journals Tensile fracture of a single crack in first-year sea ice

2018 ◽  
Vol 376 (2129) ◽  
pp. 20170346 ◽  
Author(s):  
J. P. Dempsey ◽  
D. M. Cole ◽  
S. Wang
Keyword(s):  
Sea Ice ◽  
Field Trips ◽  
Cohesive Crack ◽  
The Arctic ◽  
Tensile Fracture ◽  
First Year ◽  
Crack Model ◽  
Separation Curve ◽  
Ice Phenomena

The break-up of sea ice in the Arctic and Antarctic has been studied during three field trips in the spring of 1993 at Resolute, NWT, and the fall of 2001 and 2004 on McMurdo Sound via in situ cyclic loading and fracture experiments. In this paper, the back-calculated fracture information necessary to the specification of an accurate viscoelastic fictitious (cohesive) crack model is presented. In particular, the changing shape of the stress separation curve with varying conditions and loading scenarios is revealed. This article is part of the theme issue ‘Modelling of sea-ice phenomena’.

scholarly journals Assessment of diversity and conservation status of plants at Mount Kenya University Medicinal Botanical Garden, Thika sub-County, Kiambu County, Kenya

2016 ◽  
Vol 8 (6) ◽  
pp. 120-125
Author(s):  
J M Misonge ◽  
E W T Wakori ◽  
J N Kimondo ◽  
J M Kisengi ◽  
B W Waiganjo ◽  
...  
Keyword(s):  
Conservation Status ◽  
Botanical Garden
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