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| 1 | Tree wave migration across an elevation gradient in the Altai Mountains,Siberia显示文摘The phenomenon of tree waves(hedges and ribbons) formation within the alpine ecotone in Altai Mountains and its response to observed air temperature increase was considered. At the upper limit of tree growth Siberian pine(Pinus sibirica) forms hedges on windward slopes and ribbons on the leeward ones. Hedges were formed by prevailing winds and oriented along winds direction. Ribbons were formed by snow blowing and accumulating on the leeward slope and perpendicular to the prevailing winds, as well as to the elevation gradient. Hedges were always linked with microtopography features, whereas ribbons were not. Trees are migrating upward by waves and new ribbons and hedges are forming at or near tree line, whereas at lower elevations ribbons and hedges are being transformed into closed forests. Time series of high-resolution satellite scenes(from 1968 to 2010) indicated an upslope shift in the position ribbons averaged 155±26 m(or 3.7 m yr^(-1)) and crown closure increased(about 35%–90%). The hedges advance was limited by poor regeneration establishment and was negligible. Regeneration within the ribbon zone was approximately 2.5 times(5060 vs 2120 ha^(-1)) higherthen within the hedges zone. During the last four decades, Siberian pine in both hedges and ribbons strongly increased its growth increment, and recent tree growth rate for 50 year-old trees was about twice higher than those recorded for similarly-aged trees at the beginning of the 20^(th) century. Hedges and ribbons are phenomena that are widespread within the southern and northern Siberian Mountains. | Viacheslav I.KHARUK Sergei T.IM Maria L.DVINSKAYA Kenneth J.RANSON Il'ya A.PETROV | 2017 | Journal of Mountain Science2017，14，3： | 1 |
| 2 | Nd:YAG laser clinical assisted in class II furcation treatment显示文摘 | Ana Karina Pinto Andrade Ilíria Salom?o Feist Cláudio Mendes Pannuti Silvana Cai Denise Maria Zezell Giorgio Micheli | 2008 | Lasers in Medical Science2008，，4： | 1 |
| 3 | Caregivers of patients with cancer fatigue : A high level of symptom burden 显示文摘 | Matthew MC Pamela JA Maria IL | 2014 | Am J Hospi Pallia Med2014，31，2： | 1 |
| 4 | Soybean root growth inhibition and lignifications induced by p-coumaric acid 显示文摘 | Daniele IL Rogerio BL Maria LLF | 2009 | Environ Exp Bot2009，66，1： | 1 |
| 5 | Larch growth across thermal and moisture gradients in the Siberian Mountains显示文摘Climate-driven changes in the thermal and moisture regimes may variously influence different tree species growth and ranges.We hypothesize that drought resistant Siberian larch(Larix sibirica Ledeb.)and precipitation-sensitive Siberian pine(Pinus sibirica Du Tour)responded differently to climate change along the elevational thermal and precipitation gradients.We studied the influence of air temperature,precipitation,soil moisture,and atmospheric drought(indicated by the drought index SPEI)on larch and pine growth along the southward megaslope of the West Sayan Ridge.We found that since 2000 climate change resulted in increasing larch and pine radial growth index(GI)(c.1.5–3times)within treeline(2000–2300 m)and timberline(1900–2000 m)ecotones,i.e.within high precipitation zones.Within the forest-steppe ecotone(1100–1200 m)in which L.sibirica is the only species,larch GI stagnated or even decreased.The total forested area increased since 2000 up to+50%in the high elevations,whereas in the low elevations(<1400 m)area changes were negligible.Within treeline and timberline,trees’GI was stimulated by summer temperature.Meanwhile,temperature increase in early spring reduces GI due to living tissue activation followed by tissue damage by desiccation.Within forest-steppe,larch radial growth was mostly dependent on soil moisture.Warming shifted dependence on moisture to the early dates of the growing period.Acute droughts decreased GI within forest-steppe as well as within treeline,whereas the drought influence on both species within highlands was insignificant.Within forest-steppe seedlings establishment was poor,whereas it was successful within treeline and timberline.Current climate change leads to stagnation or even decrease in Larix sibirica growth in the southern lowland habitat.In combination with poor seedlings establishment,reduced growth threatens the transformation of open lowland forests into forest-steppe and steppe communities.Meanwhile,in the highlands warming facilitated the growth of Siberian larch and pine and the increase of forested area. | KHARUK Viacheslav I. PETROV Il'ya A. GOLYUKOV Alexey S. DVINSKAYA Maria L. IM Sergei T. SHUSHPANOV Alexander S. | 2023 | Journal of Mountain Science2023，20，1： | 0 |
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