scholarly journals Status and conservation of the giant muntjac Megamuntiacus vuquangensis, and notes on other muntjac species in Laos

Oryx ◽  
1998 ◽  
Vol 32 (1) ◽  
pp. 59-67 ◽  
Author(s):  
R. J. Timmins ◽  
T. D. Evans ◽  
Khamkhoun Khounboline ◽  
Chainoi Sisomphone
Keyword(s):  
Habitat Degradation ◽  
Range Limits ◽  
Restricted Range ◽  
Taxonomic Affinity ◽  
Red Data Book ◽  
Wide Range ◽  
Data Book ◽  
The Common ◽  
Near Future ◽  
Muntiacus Muntjak

The large-antlered, or giant, muntjac Megamuntiacus vuquangensis wasdescribed from Vietnam in 1994 and found concurrently in the Annamite Mountains and nearby hill ranges of central and southern Laos. The northerly and southerly range limits are still unknown. It may occupy a wide range of habitats and is found sympatrically with the common muntjac Muntiacus muntjak. Another muntjac species, the taxonomic affinity of which is as yet undetermined, was recently discovered to occur within its range. The large-antlered muntjac is probably not threatened with extinction in the near future, but in view of its restricted range and threats from habitat degradation and hunting, it should be classified as Vulnerable in the Red Data Book. Its future in Laos is largely dependent on the recently created protected-areas system to maintain large tracts of habitat and reduce hunting pressure.

scholarly journals Synphytoindication evaluation of habitats of plant species listed in the Red Data Book of Ukraine and habitat risk assessment under the impact of climate change

2020 ◽  
Vol 77 (6) ◽  
pp. 434-453
Author(s):  
V.V. Budzhak ◽  
◽  
Ya.P. Didukh ◽  
Keyword(s):  
Plant Species ◽  
Vascular Plants ◽  
Complete Information ◽  
Ecological Assessment ◽  
Red Data Book ◽  
Average Annual Temperature ◽  
Wide Range ◽  
Ecological Values ◽  
Data Book ◽  
The Impact

Ecological assessment of plant habitats in the territory of the upper basin of the Prut River was carried out using synphytoindication analysis of 2386 vegetation plots. This provided an opportunity to supplement the assessment of habitat conditions for 84 species of vascular plants listed in the Red Data Book of Ukraine. The conducted phytoindication assessment allowed to update and clarify information on the ranges of ecological amplitude for 55 species from the Red Data Book of Ukraine as well as to calculate indicators values for Crepis jacquinii for the first time. Based on the results of phytoindication assessment made for 49 species, the maximum ecological values (for 37 species) and minimum ecological values (for 38 species) were specified. Complete information on 12 environmental factors was obtained for habitats of 55 species, or 9% of species of vascular plants in the Red Data Book of Ukraine. A degree of possible threat to plant habitats is calculated, i.e. their reduction and loss due to increase in average annual temperature by 1, 2 and 3 °C. With the increase in temperature by 3 °C, the risk of habitat loss can reach 30% and only 3.5% of habitats remain out of danger, which indicates the catastrophic state of the studied habitats. At the same time, rising temperature can significantly affect the edaphic properties of the soil, in particular, the acidity regime; such indirect climate effects can be more significant for ecosystems than the direct ones. The obtained data indicate the risk of loss of species habitats, and subsequent result depends on further realization of species potential. Three options of the realization are possible: reduction and extinction, migration to other areas or landscape elements, and enhancing adaptive capacity of species. Results of ecological assessment of plant species and forecasting possible changes in their habitats based on synphytoindication methodology demonstrated the effectiveness and wide range of use of this methodology.

scholarly journals The Probability of Non-Existence of a Subgraph in a Moderately Sparse Random Graph

2018 ◽  
Vol 27 (4) ◽  
pp. 672-715
Author(s):  
DUDLEY STARK ◽  
NICK WORMALD
Keyword(s):  
Random Graph ◽  
General Procedure ◽  
Restricted Range ◽  
Graph Models ◽  
Random Graph Models ◽  
Wide Range ◽  
Applicable Range ◽  
The Common ◽  
Asymptotic Probability ◽  
Large Clusters

We develop a general procedure that finds recursions for statistics counting isomorphic copies of a graph G0 in the common random graph models ${\cal G}$(n,m) and ${\cal G}$(n,p). Our results apply when the average degrees of the random graphs are below the threshold at which each edge is included in a copy of G0. This extends an argument given earlier by the second author for G0=K3 with a more restricted range of average degree. For all strictly balanced subgraphs G0, our results give much information on the distribution of the number of copies of G0 that are not in large ‘clusters’ of copies. The probability that a random graph in ${\cal G}$(n,p) has no copies of G0 is shown to be given asymptotically by the exponential of a power series in n and p, over a fairly wide range of p. A corresponding result is also given for ${\cal G}$(n,m), which gives an asymptotic formula for the number of graphs with n vertices, m edges and no copies of G0, for the applicable range of m. An example is given, computing the asymptotic probability that a random graph has no triangles for p=o(n−7/11) in ${\cal G}$(n,p) and for m=o(n15/11) in ${\cal G}$(n,m), extending results of the second author.

scholarly journals Common Crane as a species indicating the conservation importance of wetlands

2021 ◽  
Vol 928 (1) ◽  
pp. 012002
Author(s):  
S V Bakka ◽  
N Yu Kiseleva
Keyword(s):  
Protected Areas ◽  
Correlation Coefficient ◽  
Rare Species ◽  
Nature Protection ◽  
Red Data Book ◽  
Wildlife Species ◽  
Common Crane ◽  
Data Book ◽  
The Common ◽  
Nizhny Novgorod Region

Abstract The relevance of the study is determined by the high importance of wetlands in the ecological frameworks of territories and the need for methodological approaches to identify wetlands of high conservation importance. The paper is aimed to demonstrate the indicator role of the Common crane to determine the conservation importance of wetlands on the example of the Nizhny Novgorod region. Objectives: to estimate the number of the common crane in existing and reserved protected areas; to analyze the presence of wildlife species listed in the Red Data Book of the Nizhny Novgorod region in these protected areas. The results of many years of surveys as well as data from the Red Data Book of Nizhny Novgorod region are analyzed. It is shown that within 93 protected areas of the total area 491870 ha 135598.4 ha of wetlands are protected, where 830 territorial pairs of cranes (about 60% of the regional population of the species) inhabit. Along with the common crane, these areas serve to protect almost all (91%) obligate wetland wildlife species listed in the Red Data Book of Nizhny Novgorod region, 82% of rare species associated with wetlands and 53% of species not associated with wetlands. Our calculations showed a high correlation of the number of rare wildlife species with the wetland area (correlation coefficient 0.75). The correlation of the number of rare species with the number of common crane was higher (correlation coefficient 0.82). Quantitative correlations of the number of rare wildlife species with the area of wetlands and the number of common cranes were also calculated. The obtained conclusions allow using the number of the common crane for substantiation of importance of wetlands for nature protection and establishment of protected areas.

scholarly journals Spontaneous vascular plants for the territory of the Znesinnya Regional Landscape Park (Lviv)

2020 ◽  
pp. 181-194
Author(s):  
Oleksandr Kuzyarin ◽  
Nadiya Sytschak ◽  
Oleksandr Kagalo
Keyword(s):  
Rare Species ◽  
Vascular Plants ◽  
Red Data Book ◽  
Wide Range ◽  
Bern Convention ◽  
Cypripedium Calceolus ◽  
Data Book ◽  
Regional Landscape ◽  
First Time ◽  
Epipactis Palustris

On the base of research florochorology, studing the main herbarion collections (LW, LWKS, LWS) and analisis the literature the checklist of the spontaneous vascular plants for the territory of the Znesinnya Regional Landscape Park has been compiled. Some 727 species from 392 genera, 108 families, 59 orders, 5 classes and 4 divisions are presented from the investigated area. Among them, the most common part (77.7%) belongs to the representatives of the Magnoliopsida class, while the Liliopsida class of representations is significantly less (19.3%). With a wide range of disputes, coniferous trees are stocked less than 3.0% of all types. The species distribution to the leading families and genera have been analysed. For the first time were recorded the present habitats of 30 rare species (15 from the Red Data Book of Ukraine, аnd 15 species are rare in the region). The locations of the rare species with state sozological status (Dactylorhiza incarnata (L.) Soó, Epipactis palustris (L.) Crantz, Listera ovata (L.) R.Br., Lilium martagon L., Orchis militaris L.) were offered for the first time. Two species from addition of the First Bern Convention (Cypripedium calceolus and Pulsatilla grandis) are disappeared on the territory of the park.

To the moss flora of sanctuary “Vaaramaenselka Ridge” (Leningrad Region)

2012 ◽  
Vol 46 ◽  
pp. 269-273
Author(s):  
L. E. Kurbatova ◽  
E. G. Leushina
Keyword(s):  
New Records ◽  
Leningrad Region ◽  
Moss Species ◽  
Red Data Book ◽  
Book Of Nature ◽  
Data Book

The new records of 10 rare moss species of sanctuary “Vaaramaenselka Ridge” (Leningrad Region) are given. New data on the 2 moss species [Homalothecium sericeum (Hedw.) Bruch et al., Mnium hormun Hedw.] included in Red Data Book of Nature of the Leningrad Region are obtained.

Liverworts of the Uzon Volcano caldera (Kronotsky Nature Reserve, Kamchatka)

2011 ◽  
Vol 45 ◽  
pp. 386-393
Author(s):  
A. D. Potemkin ◽  
E. Yu. Kuzmina ◽  
T. I. Koroteeva (Nyushko)
Keyword(s):  
Species Composition ◽  
Nature Reserve ◽  
Uzon Caldera ◽  
Red Data Book ◽  
Natural Feature ◽  
Data Book ◽  
First Time ◽  
Kronotsky Nature Reserve

Species composition of liverworts of unique natural feature of Kamchatka — Uzon Volcano caldera is listed. It includes 38 species. 29 of them are found for the first time for the Uzon caldera. Marsupella funckii, Nardia assamica, N. unispiralis included in Red Data Book of Kamchatka (2007).

To the hepatic flora of the Sochi National Park (Western Caucasus)

2011 ◽  
Vol 45 ◽  
pp. 301-317 ◽  
Author(s):  
N. A. Konstantinova ◽  
A. N. Savchenko
Keyword(s):  
National Park ◽  
Conservation Value ◽  
Western Caucasus ◽  
The Caucasus ◽  
European Species ◽  
Red Data Book ◽  
Annotated List ◽  
New Localities ◽  
Data Book ◽  
First Time

The annotated list of hepatics of the Sochi National Park includes 80 taxa. It is based on literature records and identification of 250 specimens collected by the authors. Scapania obcordata (Berggr.) S. W. Arnell and Calypogeia fissa (L.) Raddi var. intermedia (C. E. O. Jensen) Jorg. are new for the Caucasus, 17 taxa are new for Krasnodar Territory, 41 hepatics are reported for the first time for the park. New localities of 3 red-listed European species and of 6 species included in the Red Data Book of Krasnodar Territory are cited, indicating significant conservation value of the reserve.

To the liverworts flora (Marchantiophyta) of the Monche-tundra Mts. (Lapland State Nature Reserve, Murmansk Region)

2011 ◽  
Vol 45 ◽  
pp. 276-291 ◽  
Author(s):  
E. A. Borovichev
Keyword(s):  
Nature Reserve ◽  
Red Data Book ◽  
Annotated List ◽  
Murmansk Region ◽  
State Nature Reserve ◽  
Data Book ◽  
First Time ◽  
State Nature

An annotated list of hepatics of Monche-tundra Mts. was compiled for the first time. It includes 123 species and 8 varieties. Lophoziopsis excisa var. elegans is reported as new for the Murmansk Region, Lejeunea cavifolia was recorded secondly for the region, and Scapania tundrae is new for Lapland State Nature Reserve. There are 18 species listed in the Red Data Book of Murmansk Region.

COPPER ALLOY No. 268

Alloy Digest ◽  
1976 ◽  
Vol 25 (2) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Copper Alloy ◽  
Cold Working ◽  
Heat Treating ◽  
Zinc Alloy ◽  
Good Resistance ◽  
Wide Range ◽  
Copper Zinc ◽  
The Common ◽  
Cold Worked

Abstract Copper Alloy No. 268 is a copper-zinc alloy with excellent cold-working properties and good resistance to corrosion. It can be cold worked by all the common fabrication processes and has a wide range of applications. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-306. Producer or source: Brass mills.

The chemistry of 4-(dicyanomethylene)-3-methyl-l-phenyl-2-pyrazoline-5- ones as a privileged scaffold in synthesis of heterocycles

2020 ◽  
Vol 17 ◽  
Author(s):  
Mohsen A.-M. Gomaa ◽  
Huda A. Ali
Keyword(s):  
Building Block ◽  
Heterocyclic Compounds ◽  
Recent Progress ◽  
Reaction Conditions ◽  
Azacrown Ethers ◽  
Wide Range ◽  
Privileged Scaffold ◽  
Number Of Publications ◽  
Near Future

Background : The reactivity of 4-(dicyanomethylene)-3-methyl-l-phenyl-2-pyrazoline-5-one DCNP 1 and its derivatives makes it valuable as a building block for the synthesis of heterocyclic compounds like pyrazolo-imidazoles, - thiazoles, spiropyridines, spiropyrroles, spiropyrans and others. As a number of publications have reported on the reactivity of DCNP and its derivatives, we compiled some features of this interesting molecule. Objective: This article aims to review the preparation of DCNP, its reactivity and application in heterocyclic and dyes synthesis. Conclusion: In this review we have provided an overview of recent progress in the chemistry of DCNP and its significance in synthesis of various classes of heterocyclic compounds and dyes. The unique reactivity of DCNP offers unprecedentedly mild reaction conditions for the generation of versatile cynomethylene dyes from a wide range of precursors including amines, α-aminocarboxylic acids, their esters, phenols, malononitriles and azacrown ethers. We anticipate that more innovative transformations involving DCNP will continue to emerge in the near future.

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