Effect of waterlogging on regeneration in the dwarf birch (Betula nana)

Ejankowski, Wojciech

doi:10.2478/s11756-008-0126-8

Cited by 9 publications

(9 citation statements)

References 28 publications

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“…Ramet age and size were relatively high, and the proportion of ramets in middle age 9-13 years, which are potentially fertile, was similar in all Sites (Ejankowski 2008).…”

Section: Discussionmentioning

confidence: 94%

“…The explanation of its simultaneous decline in all study sites may be meteorological conditions, because precipitation in 2001 exceeded the average value by 21%. Rising water level in the peat bog could also affect the abundance of B. nana by increasing mortality (Ejankowski 2008). In fact, its mortality was generally higher in 2001-2002, than 2002-2003. The pattern of ramet age was different from that of ramet size: age was similar in the Sites, whereas the length varied in different vegetation types.…”

Section: Discussionmentioning

confidence: 99%

“…In sites with dense vegetation canopy and deep litter layer the development of seedlings is hampered, whereas vegetative reproduction is promoted (Grime 2001). On the other hand, the lack of seedling germination and the low investment in generative reproduction may not only be an effect of life strategy, but also an effect of stress (Ejankowski 2008). Sexual reproduction may be also important strategy in some long-lived clonal plants, and establishment from seeds can contribute in population growth in favourable years (Weppler et al 2006).…”

Section: Discussionmentioning

confidence: 99%

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Demographic variation of dwarf birch (Betula nana) in communities dominated by Ledum palustre and Vaccinium uliginosum

Ejankowski

2010

Biologia

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Abstract:The structure and demographic processes were compared in shrub communities to test the effects of vegetation succession on population growth, fecundity and abundance of the dwarf birch (Betula nana L.), which is a rare and endangered plant species in Poland and a glacial relict in Central Europe. The effects of Ledum palustre L. and Vaccinium uliginosum L. were studied in the Linje nature reserve in Che lmińskie Lake District (northern Poland), in three permanent plots on a peat bog. Vegetative growth and reproduction of B. nana were lower in plant communities dominated by L. palustre and V. uliginosum, than in a reference site. Fecundity was also lower, despite the fact that the percentage share of potentially fertile age groups was similar in all study sites. Mortality of ramets was independent of vegetation, both for juvenile and mature stages. The results confirm that B. nana is intolerant of shade, and it is more abundant in vegetation without competitors. Light limitation can lead to its decline, primarily by a decrease in vegetative growth. Sexual reproduction may be negatively affected by shade, but it plays only small role in population growth. Butterfly larvae can destroy inflorescences, and thus contribute to low effectiveness of sexual reproduction. Increasing density of shrubs and trees in peat bogs can reduce the abundance of dwarf birch, and can lead to the extinction of its local populations.

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“…Ramet age and size were relatively high, and the proportion of ramets in middle age 9-13 years, which are potentially fertile, was similar in all Sites (Ejankowski 2008).…”

Section: Discussionmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Demographic variation of dwarf birch (Betula nana) in communities dominated by Ledum palustre and Vaccinium uliginosum

Ejankowski

2010

Biologia

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“…A sim i lar pat tern is ob served in the Linie rel ict bog in north ern Poland (Ejankowski and Kunz, 2006), wherein the dwarf birch occurs in the dwarf shrub com mu ni ties Ledo-Sphagnetum magellanici, and fur ther re treats. This is caused by a low ground wa ter level, that could po ten tially be trig gered by waterlogging of the ground, as ob served by Ejankowski (2004Ejankowski ( , 2008. The dwarf birch de cline is re corded at a depth of 815-820 cm in the Zw-3 pro file.…”

Section: Discussion Palaeoenvironmental Interpretation Of Pollen and mentioning

confidence: 95%

Upper Pleistocene palaeoenvironmental changes at the Zwierzyniec site, central Poland

Kalińska

Dzierżek

Bińka

et al. 2016

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The pa per pres ents the data on an Eemian-Late Gla cial sed i men tary se quence from the Zwierzyniec site, cen tral Po land. A num ber of bore holes doc u ment one or two or ganic lay ers that oc cur be neath one or two ho ri zons of clayey and silty de pos its of ice-dammed lakes. This study dem on strates to which ex tent the Zwierzyniec site can con trib ute to a better un der stand ing of the palaeoenvironmental changes dur ing the Eemian-Vistulian time-frame in cen tral Po land. To study it, a multi-proxy approach was ap plied, in volv ing: palynological and plant macrofossil anal y sis, study of round ing of quartz grains and mor phology of their sur face, and in ves ti ga tions of sand min er al ogy and till pe trog ra phy. The re sults show that a till bed is over lain by a sandy se ries cor re spond ing to the gla cial-inter gla cial tran si tion. Ei ther one or two dis tinct peaks of or ganic ac cu mu la tion are ev i denced by peat ho ri zons. The lower ho ri zon re cords spec tra with ha zel and horn beam, and did, there fore, ac cu mu late in the Eemian. Ob served only in some bore holes, the up per peat ho ri zon marks the BrÝrup (or the lower part of the Rederstall stadial) rep re sented by for est-steppe con di tions with patchy mo sa ics of larch and fur ther tran si tion into sedges and her baceous taxa. Lo cal ized in be tween the two peat se quences, the sandy ho ri zon marks a long-last ing ae olian trans for ma tion with weath er ing by frost in the Early Vistulian. Again, sig nif i cant changes of the palaeoenvironmental re gime oc curred, and are man i fested in the one or two ho ri zons of the glaciolacustrine sed i ments. This cor re sponded to the last gla ci ation in the region, when the ice-dammed lakes formed dur ing the Main Stadial.

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“…B. nana is a polycormic shrub in which specific ramets are connected to the parent plant; however, they can exist as independent shoots when severed (Kummerow 1983). The oldest ramets in the LIN stands were 17 years old (Ejankowski 2008), although it has been found that sprouting in birches could occur from centuries-old root fragments (Brodie 1994). It is likely that clonal growth allows specific genets to survive in unsuitable habitat conditions and to produce flowers and seeds when conditions are relaxed.…”

Section: Discussionmentioning

confidence: 99%

Genetic diversity and sexual reproduction in relict populations of Betula nana

Jadwiszczak¹,

Kłosowski²,

Zalewska³

et al. 2017

Silva Fenn.

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Highlights• Genetic diversity parameters and meiotic recombination frequencies in the relict populations were comparable to those from widespread localities.• Contribution of seeds without ovule was very high.• Fully developed seeds germinated better in central populations.• Significant differences of groundwater parameters were observed between relict and central populations. AbstractIn the present study, the impact of geographical isolation and habitat conditions on genetic diversity and sexual reproduction was tested in four relict populations of dwarf birch Betula nana L. in Poland and Belarus. Amplified fragment length polymorphism (AFLP) method revealed that the endangered central European stands were not genetically extirpated compared with the widespread localities from Finland and Russia, which can result from infrequent outcrossing events in long-living clonal populations. However, genetic clustering methods indicated significant differentiation of the Polish populations because of their small sizes and long-term geographical isolation. Considerable numbers of empty seeds were observed in both relict and central locations, although fully developed seeds germinated better in widespread populations. Analysis of groundwater chemical parameters indicated that two relict populations were significantly different from the remaining samples with respect to pH, electrical conductivity and concentrations of phosphorus ions, which can also influence the efficiency of sexual reproduction. In the light of results obtained it seems that endangered B. nana localities are relatively stable.

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Effect of waterlogging on regeneration in the dwarf birch (Betula nana)

Cited by 9 publications

References 28 publications

Demographic variation of dwarf birch (Betula nana) in communities dominated by Ledum palustre and Vaccinium uliginosum

Demographic variation of dwarf birch (Betula nana) in communities dominated by Ledum palustre and Vaccinium uliginosum

Upper Pleistocene palaeoenvironmental changes at the Zwierzyniec site, central Poland

Genetic diversity and sexual reproduction in relict populations of Betula nana

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