Effects of Warming on Alpine Grassland Plants
Kudernatsch, T., Fischer, A., Bernhardt-Romermann, M. and Abs, C. 2008. Short-term effects of temperature enhancement on growth and reproduction of alpine grassland species. Basic and Applied Ecology 9: 263-274.
According toKudernatsch et al. (2008), who conducted the experiment, "growth and/or reproduction of 12 of the 14 studied species were significantly stimulated by warming," that "only two species showed no response," and that "none of the species experienced decreases in growth or reproduction." They also found that dwarf shrubs and graminoids showed stronger responses than herbaceous perennials, and that "a significant effect of warming on nutrient availability could not be detected," leading them to conclude that "the observed response of vegetation is therefore mainly caused by direct and not by indirect temperature effects."
Overall, the four researchers found what most other studies of warming effects on alpine plants have found -- "positive effects on growth and reproduction of the species" -- in support of which statement they cite eleven different scientific papers, additionally noting that "the non-appearance of an effect or even a negative response is rather an exception." Hence, they write that "obviously -- as in our study -- a large number of alpine plant species benefit from temperature enhancement," so much so, in fact, that they are able to report that increases in species richness in high-mountain ecosystems have been documented for the Alps as well as for Scandinavia, citing five additional scientific papers in support of this statement.