Botanica Pacifica

Research paper

Botanica Pacifica. A journal of plant science and conservation Preprint
Article first published online: 31 MAR 2015 | DOI: 10.17581/bp.2015.04101

Alpine plant communities of Tibet and Caucasus: in quest of functional convergence

Tatiana G. Elumeeva 1,2, Vladimir G. Onipchenko 1, Elena N. Rovnaia 1, Yan Wu 2, Marinus J.A. Werger 3

1 Department of Geobotany, Biological Faculty, Moscow State Lomonosov University, Moscow, Russia
2 Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, China
3 Utrecht University, Utrecht, The Netherlands

We compared aboveground phytomass structure and community weighed mean leaf traits (leaf area and specific leaf area) in alpine plant communities of Tibet (alpine shrub meadows and alpine bogs, grazed and fenced) and the Caucasus (alpine lichen heaths, Festuca varia grasslands, Geranium-Hedysarum meadows, alpine snowbeds and alpine fens). We tested, if (1) the communities at least partly show functional convergence, (2) the mean community biomass weighed traits vary in accordance with position along a catena, and (3) grazing influences community functional structure. To reveal the pattern of functional structure we run Detrended Correspondence Analysis with the biomass of functional groups as variables and plots as cases. Position along a catena was the main driver, and the alpine fens of both Tibet and the Caucasus were the most similar in functional structure. Community biomass weighed specific leaf area increased with water availability and from grass-dominated to frequently disturbed forb-dominated communities.

Елумеева Т.Г., Онипченко В.Г., Ровная Е.Н., У Янь, Вергер М.Дж.А. Альпийские фитоценозы Тибета и Кавказа: в поисках функционального сходства Мы сравнили структуру надземной фитомассы и средневзвешенные по биомассе признаки листьев (площадь листа и удельная листовая поверхность) в альпийских сообществах Тибета (альпийские кустарниковые луга и альпийские болота с выпасом и без) и Кавказа (альпийские лишайниковые пустоши, пестроовсяницевые луга, гераниево-копеечниковые луга, альпийские ковры и альпийские болота). Мы проверили, 1) есть ли между сообществами черты функционального сходства; 2) изменяются ли средневзвешенные признаки листьев в зависимости от положения сообщества в катене; 3) выпас влияет на функциональную структуру сообществ. Чтобы выявить закономерности в структуре сообществ, мы провели анализ соответствия с удаленным трендом с биомассой растений, относящихся к разным функциональным группам, в качестве зависимых переменных, и площадками в качестве независимых переменных. Положение сообщества в катене оказалось ведущим фактором, а альпийские болота Тибета и Кавказа оказались наиболее сходными по функциональной структуре. Средневзвешенная удельная листовая поверхность возрастала при увеличении влажности местообитания и от сообществ с доминированием злаков к сообществам с доминированием разнотравья и частыми нарушениями.

Keywords: alpine vegetation, aboveground phytomass, leaf area, specific leaf area, ordination, альпийская растительность, надземная фитомасса, площадь листа, удельная листовая поверхность, ординация



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