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@article{750349,
author = {Chytrý, Milan and Danihelka, Jiří and Ermakov, Nikolai and Hájek, Michal and Hájková, Petra and Kočí, Martin and Kubešová, Svatava and Lustyk, Pavel and Otýpková, Zdenka and Popov, Denis and Roleček, Jan and Řezníčková, Marcela and Šmarda, Petr and Valachovič, Milan},
article_number = {5},
keywords = {Calcicole/calcifuge; forest-steppe; plant community; Pleistocene environments; precipitation; soil acidity; tundra; vascular plants},
language = {eng},
issn = {1466-822X},
journal = {Global ecology and biogeography},
title = {Plant species richness in continental southern Siberia: effects of pH and climate in the context of the species pool hypothesis.},
url = {http://onlinelibrary.wiley.com/doi/10.1111/j.1466-8238.2007.00320.x/abstract},
volume = {16},
year = {2007}
}
TY - JOUR
ID - 750349
AU - Chytrý, Milan - Danihelka, Jiří - Ermakov, Nikolai - Hájek, Michal - Hájková, Petra - Kočí, Martin - Kubešová, Svatava - Lustyk, Pavel - Otýpková, Zdenka - Popov, Denis - Roleček, Jan - Řezníčková, Marcela - Šmarda, Petr - Valachovič, Milan
PY - 2007
TI - Plant species richness in continental southern Siberia: effects of pH and climate in the context of the species pool hypothesis.
JF - Global ecology and biogeography
VL - 16
IS - 5
SP - 668–678
EP - 668–678
SN - 1466822X
KW - Calcicole/calcifuge
KW - forest-steppe
KW - plant community
KW - Pleistocene environments
KW - precipitation
KW - soil acidity
KW - tundra
KW - vascular plants
UR - http://onlinelibrary.wiley.com/doi/10.1111/j.1466-8238.2007.00320.x/abstract
N2 - Aim: Many high-latitude floras contain more calcicole than calcifuge vascular plant species. The species pool hypothesis explains this pattern through an historical abundance of high-pH soils in the Pleistocene and an associated opportunity for the evolutionary accumulation of calcicoles. To obtain insights into the history of calcicole/calcifuge patterns, we studied species richness-pH-climate relationships across a climatic gradient, which included cool and dry landscapes resembling the Pleistocene environments of northern Eurasia. Location: Western Sayan Mountains, southern Siberia. Methods: Vegetation and environmental variables were sampled at steppe, forest and tundra sites varying in climate and soil pH, which ranged from 3.7 to 8.6. Species richness was related to pH and other variables using linear models and regression trees. Results: Species richness is higher in areas with warmer winters and at medium altitudes that are warmer than the mountains and wetter than the lowlands. In treeless vegetation, the species richness-pH relationship is unimodal. In tundra vegetation, which occurs on low-pH soils, richness increases with pH, but it decreases in steppes, which have high-pH soils. In forests, where soils are more acidic than in the open landscape, the species richness-pH relationship is monotonic positive. Most species occur on soils with a pH of 6-7. Main conclusions: Soil pH in continental southern Siberia is strongly negatively correlated with precipitation, and species richness is determined by the opposite effects of these two variables. Species richness increases with pH until the soil is very dry. In dry soils, pH is high but species richness decreases due to drought stress. Thus, the species richness-pH relationship is unimodal in treeless vegetation. Trees do not grow on the driest soils, which results in a positive species richness-pH relationship in forests. If modern species richness resulted mainly from the species pool effects, it would suggest that historically common habitats had moderate precipitation and slightly acidic to neutral soils.
ER -
CHYTRÝ, Milan, Jiří DANIHELKA, Nikolai ERMAKOV, Michal HÁJEK, Petra HÁJKOVÁ, Martin KOČÍ, Svatava KUBEŠOVÁ, Pavel LUSTYK, Zdenka OTÝPKOVÁ, Denis POPOV, Jan ROLEČEK, Marcela ŘEZNÍČKOVÁ, Petr ŠMARDA and Milan VALACHOVIČ. Plant species richness in continental southern Siberia: effects of pH and climate in the context of the species pool hypothesis. \textit{Global ecology and biogeography}. 2007, vol.~16, No~5, p.~668–678. ISSN~1466-822X.
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