Salix myrtilloides and Salix × onusta in Slovakia

Biologia ◽  
2012 ◽  
Vol 67 (4) ◽  
Author(s):  
Dana Bernátová ◽  
Vladimír Migra
Keyword(s):  
Interspecific Hybrid ◽  
Original Data ◽  
Critically Endangered ◽  
Western Carpathians ◽  
Actual State ◽  
Endangered Population ◽  
Recent Occurrence

AbstractThe authors bring actual state of recent occurrence of the rarest willows species Salix myrtilloides, its critically endangered population from northern part of the Western Carpathians. First original data on recent existence and distribution of the interspecific hybrid Salix × onusta (= S. myrtilloides × S. aurita) completes at the same time knowledge on hitherto unknown past occurrence of S. myrtilloides in the Western Carpathians and extinction of that population.

scholarly journals Historical and recent occurrence of epixylous moss Buxbaumia viridis in the Javorníky Mts. and the Vsetínské vrchy hills (Western Carpathians)

2011 ◽  
Vol 60 (2) ◽  
pp. 185-189 ◽  
Author(s):  
Vítězslav Plášek ◽  
Eva Novozámská
Keyword(s):  
Twentieth Century ◽  
Central Europe ◽  
Field Monitoring ◽  
Western Carpathians ◽  
Vulnerable Species ◽  
Precise Localization ◽  
Ecological Data ◽  
Recent Occurrence

Historical and recent occurrence of epixylous moss Buxbaumia viridis in the Javorníky Mts. and the Vsetínské vrchy hills (Western Carpathians) The epixylous moss Buxbaumia viridis (Moug. ex Lam. & DC.) Brid. ex Moug. & Nestl. is considered an endangered or vulnerable species in all countries in the Central Europe. In the Czech part of the Western Carpathians the species was recorded very occasionally in the twentieth century. In 2011 field monitoring of the species on historically known localities in Javorníky Mts. and the Vsetínské vrchy hills was carried out. As a result, six localities of B. viridis have been recorded in this region. Precise localization, number of and ecological data are given.

scholarly journals Conservation management of small core areas: key to survival of a Critically Endangered population of Irrawaddy river dolphins Orcaella brevirostris in Indonesia

Oryx ◽  
2005 ◽  
Vol 39 (2) ◽  
pp. 178-188 ◽  
Author(s):  
Daniëlle Kreb ◽  
Budiono
Keyword(s):  
Average Length ◽  
Critically Endangered ◽  
Conservation Strategies ◽  
East Kalimantan ◽  
Main River ◽  
The Status ◽  
Boat Traffic ◽  
Endangered Population ◽  
Local Residents ◽  
Local Awareness

Indonesia's only freshwater dolphin is the facultative Irrawaddy river dolphin Orcaella brevirostris in the Mahakam River in East Kalimantan, Borneo. To clarify the status of this Critically Endangered subpopulation we carried out a series of surveys from early 1999 until mid 2002 on abundance, habitat use, population dynamics and threats. Our estimates of total population size were 33–55 dolphins (95% confidence limits 31–76) based on direct counts, strip-transect analysis, and Petersen and Jolly-Seber mark-recapture analyses of photo-identified individuals. Mean minimum annual birth and mortality rates were similar, i.e. 13.6 and 11.4%, and no changes in abundance >8% were detected over 2.5 years. Dolphins died mainly from entanglement in gill-nets (73% of deaths). The dolphins' main habitat includes confluence areas between the main river and tributaries or lakes. Dolphins make intensive daily use of these confluences, moving up and downstream over an average length of 10 km of river and within a 1.1 km2 area. These areas are also important fishing grounds and subject to intensive motorized boat traffic. Sixty-four percent of deaths (1995–2001) with known location (n = 36) occurred in these areas. Interviews with local residents revealed a generally positive attitude towards the establishment of protected areas for this subpopulation. Because of the dolphins' dependence on areas that are also used intensively by people, primary conservation strategies should be to increase local awareness and introduce alternative fishing techniques.

scholarly journals Revision of occurrence and phytosociology of Ranunculus pedatus Waldst. et Kit. in Slovakia

2021 ◽  
Author(s):  
Pavol Eliáš ◽  
Zuzana Dítě ◽  
Mariana Eliášová ◽  
Daniel Dítě
Keyword(s):  
Czech Republic ◽  
20Th Century ◽  
Red List ◽  
Critically Endangered ◽  
The Czech Republic ◽  
Northern Distribution ◽  
Recent Occurrence ◽  
Herbarium Collections ◽  
The Village ◽  
Eurasian Species

Ranunculus pedatus is a Eurasian species with a northern distribution edge in southern Slovakia. In the nineties of the 20th century, it was assumed that the species probably occurs only near Štúrovo. Occurrence in the Hron and Ipeľ basins and several localities in the Podunajská nížina lowland between Komárno and Štúrovo was considered historical. Our research was conducted in the field and herbarium collections of 15 herbaria in Austria, the Czech Republic, Hungary, and Slovakia. Except for the well-known occurrence on salt habitats north of Štúrovo, we confirmed the recent occurrence of R. pedatus in Štúrovo town, around Chľaba village and in Ipeľ Basin (Pastovce, Tupá). The new, easternmost Slovak locality was found near the village of Koláre. Recently, 30% of all known sites were confirmed, so we propose reclassifying the species in Slovak Red List from the category critically endangered (CR) to the category endangered (EN). It occurs in salty meadows of the alliance Festucion pseudovinae (class Festuco-Puccinellietea) and in mesic meadows of alliance Arrhenatherion elatioris and Deschampsion cespitosae (class Molinio-Arrhenatheretea).

scholarly journals Heterozygosity–Fitness Correlations Reveal Inbreeding Depression in Neonatal Body Size in a Critically Endangered Rock Iguana

2019 ◽  
Author(s):  
Jeanette B Moss ◽  
Glenn P Gerber ◽  
Mark E Welch
Keyword(s):  
Body Size ◽  
Inbreeding Depression ◽  
Genetic Load ◽  
Critically Endangered ◽  
First Year ◽  
Isolated Populations ◽  
Conditional Expression ◽  
Age Dependent ◽  
Endangered Population ◽  
Related Trait

Abstract Inbreeding depression, though challenging to identify in nature, may play an important role in regulating the dynamics of small and isolated populations. Conversely, greater expression of genetic load can enhance opportunities for natural selection. Conditional expression concentrates these opportunities for selection and may lead to failure of detection. This study investigates the possibility for age-dependent expression of inbreeding depression in a critically endangered population of rock iguanas, Cyclura nubila caymanensis. We employ heterozygote-fitness correlations to examine the contributions of individual genetic factors to body size, a fitness-related trait. Nonsignificant reductions in homozygosity (up to 7%) were detected between neonates and individuals surviving past their first year, which may reflect natural absorption of inbreeding effects by this small, fecund population. The majority of variation in neonate body size was attributed to maternal or environmental effects (i.e., clutch identity and incubation length); however, heterozygosity across 22 microsatellite loci also contributed significantly and positively to model predictions. Conversely, effects of heterozygosity on fitness were not detectable when adults were examined, suggesting that inbreeding depression in body size may be age dependent in this taxon. Overall, these findings emphasize the importance of taking holistic, cross-generational approaches to genetic monitoring of endangered populations.

Rotational Characteristics of the Green Solar Corona: 1947-1991

1994 ◽  
Vol 144 ◽  
pp. 139-141 ◽  
Author(s):  
J. Rybák ◽  
V. Rušin ◽  
M. Rybanský
Keyword(s):  
Solar Corona ◽  
World Wide ◽  
Rotation Period ◽  
Original Data ◽  
Coronal Emission ◽  
Time Intervals ◽  
Data Set ◽  
The World ◽  
Coronal Emission Line ◽  
Homogeneous Data

AbstractFe XIV 530.3 nm coronal emission line observations have been used for the estimation of the green solar corona rotation. A homogeneous data set, created from measurements of the world-wide coronagraphic network, has been examined with a help of correlation analysis to reveal the averaged synodic rotation period as a function of latitude and time over the epoch from 1947 to 1991.The values of the synodic rotation period obtained for this epoch for the whole range of latitudes and a latitude band ±30° are 27.52±0.12 days and 26.95±0.21 days, resp. A differential rotation of green solar corona, with local period maxima around ±60° and minimum of the rotation period at the equator, was confirmed. No clear cyclic variation of the rotation has been found for examinated epoch but some monotonic trends for some time intervals are presented.A detailed investigation of the original data and their correlation functions has shown that an existence of sufficiently reliable tracers is not evident for the whole set of examinated data. This should be taken into account in future more precise estimations of the green corona rotation period.

Production of New and Revised A.A.V.S.O. Charts

1979 ◽  
Vol 46 ◽  
pp. 368
Author(s):  
Clinton B. Ford
Keyword(s):  
Variable Star ◽  
Standard Form ◽  
Original Data ◽  
University Of Pennsylvania ◽  
Standard Format ◽  
Additional Information ◽  
The Gift ◽  
The University

A “new charts program” for the Americal Association of Variable Star Observers was instigated in 1966 via the gift to the Association of the complete variable star observing records, charts, photographs, etc. of the late Prof. Charles P. Olivier of the University of Pennsylvania (USA). Adequate material covering about 60 variables, not previously charted by the AAVSO, was included in this original data, and was suitably charted in reproducible standard format.Since 1966, much additional information has been assembled from other sources, three Catalogs have been issued which list the new or revised charts produced, and which specify how copies of same may be obtained. The latest such Catalog is dated June 1978, and lists 670 different charts covering a total of 611 variables none of which was charted in reproducible standard form previous to 1966.

Does the kappa number method accurately reflect lignin content in nonwood pulps?

TAPPI Journal ◽  
2018 ◽  
Vol 17 (11) ◽  
pp. 611-617
Author(s):  
Sabrina Burkhardt
Keyword(s):  
Lignin Content ◽  
Paper Industry ◽  
Pulp And Paper Industry ◽  
Original Data ◽  
Kappa Number ◽  
Klason Lignin ◽  
Organic Functional Groups ◽  
Pulp Properties ◽  
Wood Pulps ◽  
Hexenuronic Acid

The traditional kappa number method was developed in 1960 as a way to more quickly determine the level of lignin remaining in a completed or in-progress pulp. A significantly faster approach than the Klason lignin procedure, the kappa number method is based on the reaction of a strong oxidizing agent (KMnO4) with lignin and small amounts of other organic functional groups present in the pulp, such as hexenuronic acid. While the usefulness of the kappa number for providing information about bleaching requirements and pulp properties has arguably transformed the pulp and paper industry, it has been mostly developed for kraft, sulfite, and soda wood pulps. Nonwood species have a different chemical makeup than hardwood or softwood sources. These chemical differ-ences can influence kappa and Klason measurements on the pulp and lead to wide ranges of error. Both original data from Sustainable Fiber Technologies’ sulfur and chlorine-free pulping process and kappa and Klason data from various nonwood pulp literature sources will be presented to challenge the assumption that the kappa number accurately represents lignin content in nonwood pulps.

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