scholarly journals (2719) Proposal to conserve the name Betula humilis Schrank against B. humilis Marshall ( Betulaceae )

Taxon ◽  
2019 ◽  
Vol 68 (5) ◽  
pp. 1121-1122
Author(s):  
Igor G. Olshanskyi ◽  
Sergei L. Mosyakin
Keyword(s):  
Betula Humilis

Stanowiska reliktowego gatunku Betula humilis (Betulaceae) w Dolinie Górnego Nurca na Nizinie Północnopodlaskiej

2019 ◽  
pp. 161-168
Author(s):  
Aleksander Kołos
Keyword(s):  
Drainage Ditches ◽  
North West ◽  
Hay Meadows ◽  
The North ◽  
South West ◽  
North Eastern ◽  
New Localities ◽  
Western Border ◽  
Betula Humilis ◽  
Trees And Shrubs

Betula humilis Schrank (shrubby birch) is among the most endangered shrub species in Poland. All localities are in the eastern and northern parts of the country, where the species reaches the western border of its geographical range in Europe. Betula humilis is disappearing in Poland due to wetland melioration and shrub succession. Over 80% of the localities described in Poland have not been confirmed in the last 20 years. Five new localities of B. humilis in the North Podlasie Lowland were recorded from 2008 to 2019 in the Upper Nurzec Valley (Fig. 1): 1–1.5 km south-west of Pawlinowo village (in the ATPOL GC7146 plot) and 1.5–2 km north-west of Żuki village (ATPOL GC7155, GC156 and GC166). The population near Pawlinowo (locality 1) is currently composed of ~80 individuals (101 individuals were noted in 2010) and is one of the largest populations in north-eastern Poland. Betula humilis grows there within patches dominated by Salix rosmarinifolia and megaforbs. The population at locality 5 is composed of 18 individuals. At the remaining localities, only 1–4 individuals were found, scattered along drainage ditches surrounded by hay meadows. At some of these localities the species is threatened with extinction. It is suggested to remove competitive trees and shrubs (mainly Populus tremula, Betula pubescens and Salix cinerea) in order to maintain the local populations.

scholarly journals The occurence of rare and protected plant species on the peat bog near Lake Bikcze (Łęczyńsko-Włodawskie Lakeland)

2012 ◽  
Vol 61 (2) ◽  
pp. 113-120 ◽  
Author(s):  
Magdalena Pogorzelec ◽  
Barbara Banach
Keyword(s):  
Plant Species ◽  
Abiotic Factors ◽  
Habitat Preferences ◽  
Peat Bog ◽  
Habitat Conditions ◽  
Drosera Rotundifolia ◽  
Western Shore ◽  
Betula Humilis ◽  
Menyanthes Trifoliata

This paper presents the results of a pilot field study, conducted in July 2007, designed to make floristic evaluation of the peat bog area adjacent to the western shore of Lake Bikcze (Łęczyńsko-Włodawskie Lakeland). The main aim of the study was to confirm the occurrence of populations of rare and legally protected plant species in this area and to identify, on a preliminary basis, habitat conditions in their stands. The occurrence of populations of the following strictly protected plant species: <i>Betula humilis</i>, <i>Salix lapponum</i>, <i>Salix myrtilloides</i>, <i>Carex limosa</i>, <i>Drosera intermedia</i>, <i>Drosera rotundifolia</i>, <i>Dactylorhiza incarnata</i>; and partially protected species: <i>Menyanthes trifoliata</i>, has been confirmed in the studied peat bog. Both an investigation of abiotic factors, conducted <i>in situ</i>, and an analysis of the species composition of the flora in terms of habitat preferences of particular groups of taxa have shown that the described rare plant species find suitable conditions for their growth and development in the studied peat bog.

Isolierung von Rutin aus Betula Humilis

1953 ◽  
Vol 286 (10) ◽  
pp. 481-482 ◽  
Author(s):  
L. Hörhammer ◽  
R. Hänsel ◽  
P. Frank
Keyword(s):  
Betula Humilis

РАСТИТЕЛЬНОСТЬ БОЛОТНОЙ СИСТЕМЫ ЯМНИЦКАЯ ЧИСТЬ (ЛЕНИНГРАДСКАЯ ОБЛАСТЬ), "Ботанический журнал"

2018 ◽  
pp. 980-991
Author(s):  
В. А. Смагин ◽  
О. Е. Стёпочкина ◽  
А. Ю. Доронина ◽  
Г. Я. Дорошина ◽  
Е.Ю. Кузьмина ◽  
...  
Keyword(s):  
Lobaria Pulmonaria ◽  
Betula Humilis ◽  
Pulsatilla Patens ◽  
Sphagnum Palustre

Приводятся результаты первичного исследования болотной системы Ямницкая Чисть, а также ближайших ее окрестностей, осуществленного авторами статьи в 2015 г. Ранее опубликованные сведения с описанием этой территории отсутствовали. Болотная система Ямницкая Чисть расположена на юго-востоке Ленинградской обл. (Бокситогорский р-н) в границах планируемой к созданию одноименной особо охраняемой природной территории (ООПТ) регионального значения, занимая основную ее площадь. Особенности болотной системы обусловлены положением на наклонной поверхности равнины, примыкающей с юга к Вепсовской возвышенности, а также, по-видимому, обширными торфяными пожарами в прошлом. Слагающие болотную систему разнотипные болотные массивы, среди которых встречаются редкие для Ленинградской обл. типы болот, имеют заметный уклон поверхности, что отражается на ландшафтной структуре и характере растительного покрова. Болотная система окружена лесами, эталонными для юго-востока Ленинградской обл. и представляющими весь спектр южнотаежных лесных ассоциаций. На территории болотной системы и в окружающих ее лесах обнаружены редкие виды сосудистых растений, мхов, лишайников и грибов - Betula humilis, Epipogium aphyllum, Pulsatilla patens, Sphagnum palustre, Pylaisia selwynii, Heterogemma laxa, Lobaria pulmonaria, Hericium coralloides и др.

scholarly journals Aneuploids in the shrub birch Betula humilis populations in Poland

2011 ◽  
Vol 80 (3) ◽  
pp. 233-235 ◽  
Author(s):  
Katarzyna A. Jadwiszczak ◽  
Ewa Jabłońska ◽  
Stanisław Kłosowski ◽  
Agata Banaszek
Keyword(s):  
Vegetative Reproduction ◽  
Congeneric Species ◽  
High Frequencies ◽  
Karyotype Instability ◽  
Northeastern Poland ◽  
Glacial Relict ◽  
Betula Humilis ◽  
Range Fragmentation

Shrub birch (<em>Betula humilis </em>Schrk.) is endangered glacial relict growing in natural and drained fens and transitional mires. At present study we examined karyotypes of 103 individuals of <em>B. humilis</em>, collected in six populations from eastern and northeastern Poland. We found 60% of diploid individuals with 2n = 28. The rest of studied plants were aneuploids with 26, 27, 29, 30 and 31 chromosomes in their karyotypes. High frequencies of aneuploids in Polish populations of <em>B. humilis </em>could be a consequence of: (i) hybridization with congeneric species, (ii) stress resulting from range fragmentation, (iii) karyotype instability of individuals with 2n ≠ 28, or (iv) vegetative reproduction.

Vegetation with Betula humilis in Central Europe

2012 ◽  
Vol 42 (3-4) ◽  
pp. 259-277 ◽  
Author(s):  
Ewa Jabłoñska
Keyword(s):  
Central Europe ◽  
Betula Humilis

scholarly journals Флористичні особливості гідрологічного заказника місцевого значення «Оріхівський» Ратнівського району Волинської області

2018 ◽  
pp. 36-40
Author(s):  
Oksana Ivantsiv ◽  
Vitalina Fedonyk ◽  
Vasyl’ Ivantsiv
Keyword(s):  
Cypripedium Calceolus ◽  
Scheuchzeria Palustris ◽  
Betula Humilis ◽  
Liparis Loeselii ◽  
Epipactis Helleborine ◽  
Pulsatilla Patens

У статті проаналізовано флору гідрологічного заказника місцевого значення «Оріхівський» Ратнівського району Волинської області. Основним завданням роботи було встановлення сучасного стану флористичного та фітоценотичного різноманіття гідрологічного заказника місцевого значення «Оріхівський» і виявлення на його території рідкісних та зникаючих видів флори, занесених до Червоної книги України й інших природоохоронних документів. У статті проаналiзовано аспекти становлення та розвитку флористичних досліджень заказника, подано опис фітоценотичного різноманіття. На території заказника виявлено види з Європейського червоного списку: Crataegus uсrainica Pojark., Silene lithuanica Zapał. Tragopogon ucrainicus Artemcz.; види, занесені до Додатка № 1 Бернської конвенції: Aldrovanda vesiculosa L, Cypripedium calceolus L. Liparis loeselii (L.) Rich, Pulsatilla patens (L.) Mill.; види з Червоної книги України: три зникаючі, п’ять вразливих, шість рідкісних видів на території, серед зникаючих видів потрібно відзначити Huperzia selago, Oxycoccus microcarpus, Scheuchzeria palustris, із-поміж вразливих – Cephalanthera rubra (L.), Drosera anglica Huds, Epipactis helleborine (L.) O. Kuntze, Lilium martagon L., Lycopodiella inundata (L.) Holub., серед рідкісних – Betula humilis Schrank, Listera ovata (L.) R.Br., Neottia nidus-avis (L.) Rich., Platanthera bifolia (L.) Rich., Salix myrtilloides L., Salix starkeana Willd.

scholarly journals Disappearing population of Betula humilis Schrk. on the Maliszewskie Lake, NE Poland

2015 ◽  
Vol 37 (1) ◽  
pp. 69-73 ◽  
Author(s):  
Agnieszka Chrzanowska ◽  
Katarzyna A. Jadwiszczak
Keyword(s):  
Bird Species ◽  
Lake Area ◽  
Ne Poland ◽  
North Eastern ◽  
Distinct Individual ◽  
Declining Populations ◽  
Nuclear Microsatellite ◽  
Glacial Relict ◽  
Betula Humilis ◽  
Single Cluster

Abstract Betula humilis Schrk. is an endangered glacial relict inhabiting wet meadows, natural and drained fens. One of its declining populations is located on the Maliszewskie Lake (the Wizna swamp, north-eastern Poland). The goal of the present study was to estimate the number of B. humilis individuals in this locality. In the Maliszewskie Lake population, 59 ramets, grouped into three clusters, were found. Twelve nuclear microsatellite loci were chosen to genotype 52 ramets. The analysis revealed that all the shoots within the single cluster had the same genotypes at the loci considered. This means that each cluster constituted one genetically distinct individual; thus, there were only three individuals of B. humilis in the studied population. The maintenance of the B. humilis population in the Maliszewskie Lake area requires urgent active protection involving removal of the shading vegetation. In fact, the entire Maliszewskie Lake is worthy of protection because of its hitherto unexplained origin and the occurrence of many endangered bird species.

scholarly journals To What Degree Can the Specifics of Occurrence of Glacial Relic Betula humilis Schrank Be an Indicator of Habitat Conditions of Moderate Climate Peatlands?

Water ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 1062 ◽  
Author(s):  
Artur Serafin ◽  
Danuta Urban ◽  
Urszula Bronowicka-Mielniczuk ◽  
Agnieszka Szczurowska
Keyword(s):  
Habitat Conditions ◽  
Climate Conditions ◽  
Factors Affecting ◽  
Habitat Transformation ◽  
Ph Values ◽  
Study Results ◽  
Botanical Research ◽  
Betula Humilis ◽  
Physical And Chemical ◽  
Moderate Climate

Anthropogenic transformations of habitat conditions in moderate climate peatlands frequently cause a decrease in the number of sites of occurrence and the size of the population of many valuable plant species, including the boreal relic Betula humilis. The objective of this paper was an attempt to relate the specifics of the occurrence of the glacial relic Betula humilis in the peatlands of Central-Eastern Poland, which developed under moderate climate conditions, to the conditions of the natural environment identified through research into the physical and chemical parameters of the groundwater, as well as botanical research into its habitat. The study results confirm that shrub birch has a broad range of ecological tolerance to the majority of the studied factors and can therefore be an indicator of habitat transformation. Important environmental factors affecting its abundance are water relations and the contribution of calcium hydroxide and phosphorus fractions. A condition favouring the proper functioning of individuals of the studied species is TP values lower than other obtained values, in the following range: 0.08–0.32; P-PO4: 0.1; TN: 2.2–21.2; N-NH4: 0.1–0.46; DOC: 24.6–55.9 (mg·dm−3), as well as higher than average pH values, in the following range: 5.34–5.95; Ca: 5.67–28.1; Mg: 0.56–2.41 (mg·dm−3) and EC: 72.1–142.3 (µS·cm−1).

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