Plant species richness in continental southern Siberia: effects of pH and climate in the context of the species pool hypothesis

0093135 - BÚ 2010 RIV GB eng J - Článek v odborném periodiku
Chytrý, M. - Danihelka, Jiří - Ermakov, N. - Hájek, Michal - Hájková, Petra - Kočí, M. - Kubešová, S. - Lustyk, P. - Otýpková, Z. - Popov, D. - Roleček, J. - Řezníčková, M. - Šmarda, P. - Valachovič, M.
Plant species richness in continental southern Siberia: effects of pH and climate in the context of the species pool hypothesis.
[Druhová bohatost rostlin na kontinentální jižní Sibiři: vliv pH a klimatu v kontextu hypotézy species pool.]
Global Ecology and Biogeography. Roč. 16, č. 5 (2007), s. 668-678. ISSN 1466-822X. E-ISSN 1466-8238
Grant CEP: GA AV ČR IAA6163303
Výzkumný záměr: CEZ:AV0Z60050516
Klíčová slova: species richness * steppe * species pool hypothesis
Kód oboru RIV: EF - Botanika
Impakt faktor: 4.435, rok: 2007

This study shows that soil pH in continental southern Siberia depends on precipitation and species richness is determined by the opposite effects of these two variables. Richness increases with pH until the soil is very dry. In dry soil, pH is high but richness decreases due to drought stress. Thus the richness-pH relationships is unimodal in treeless vegetation. Trees do not establish on the driest soils, which results in a positive 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 soil pH about 6–7.

Studie ukázala vzrůst druhové bohatosti s pH do okamžiku, kdy je půda velmi suchá. Na suchých půdách je pH vysoké, ale druhová bohatost klesá. Vztah počtu a pH je tedy v nelesní vegetaci unimodální. V lesích je však pozitivní, protože na velmi suchých půdách již stromy nerostou.
Trvalý link: http://hdl.handle.net/11104/0153265