Seed bank dynamics and climate change in semi-arid ecosystems: a focus on physically dormant species

Autores

  • Mark K. J. Ooi University of Wollongong

DOI:

https://doi.org/10.26848/rbgf.v8.0.p651-659

Palavras-chave:

seed ecology, physical dormancy, climate change, germination, maternal effects, heat wave, seedling vigour, Fabaceae, Malvaceae

Resumo

The dynamics surrounding seeds are arguably the most important drivers of population persistence in semi-arid ecosystems. To fully understand plant population persistence and, in particular, to predict the impacts of changing climatic conditions, we need to develop a clearer picture of the ecological consequences of variation in seed dormancy and germination. In this review, I focus on seeds with physical dormancy in semi-arid regions, looking at the mechanistic effects of climate on seed bank dynamics. Both pre-dispersal and post-dispersal environment effects are considered. Knowledge is lacking in the understanding of the effects of changing climate on seed production, dormancy-breaking temperature thresholds, seed longevity and seed vigour. While lessons can be learnt from the broader range of studies conducted in the agricultural sector, there is a limit as to how the results from such studies can be applied to wild species in natural ecosystems. A concerted effort to increase the amount of ecological research in native environments is needed to gain a better understanding of the effects of climate change on biodiversity.

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Publicado

2015-12-15

Como Citar

Ooi, M. K. J. (2015). Seed bank dynamics and climate change in semi-arid ecosystems: a focus on physically dormant species. Revista Brasileira De Geografia Física, 8, 651–659. https://doi.org/10.26848/rbgf.v8.0.p651-659

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