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Alpine pioneer plants in soil bioengineering for slope stabilization and restoration: results of a preliminary analysis of seed germination and future perspectives.


Autori

Giupponi L., Leoni V.

Anno
2020
Rivista
Sustainability
Numero
12
Pagine
7190
Abstract

Stabilization of slopes subject to landslide by measures with low impact, such as those of bioengineering, is a topic of interest. The use of scarcely studied alpine pioneer plants could contribute to innovation in soil bioengineering and restoration ecology but to use them, knowledge of the ex situ germinability of their seeds is fundamental.

This research analysed the germinability of seeds of nine alpine pioneer species (Papaver aurantiacumRumex scutatusTofieldia calyculataPulsatilla alpinaSilene glareosaAdenostyles alpinaDryas octopetala, Laserpitium peucedanoides and Laserpitium krapfii) treated with water, gibberellic acid (GA3) and/or calcium carbonate at room temperature. The seeds had different responses to the treatments: Laserpitium peucedanoidesL. krapfii and Silene glareosa showed difficulty in germinating (germination < 2.5%), while Dryas octopetala had good germination (39–61%) regardless of treatment. GA3 significantly increased the seed germination rate of Papaver aurantiacumPulsatilla alpinaRumex scutatus and Tofieldia calyculata, while the addition of calcium carbonate made the seeds of Rumex scutatus and Tofieldia calyculata germinate more quickly.

Results are discussed focusing on the perspectives of using alpine pioneer species in future soil bioengineering work for slopes stabilization and restoration, and on the actions that stakeholders should take to make this happen.

Keywords
alpine species; ecological restoration; limestone screes; native seeds; plant diversity; sustainability
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