J Plant Ecol ›› 2019, Vol. 12 ›› Issue (3): 419-427.doi: 10.1093/jpe/rty052

• Research Articles • Previous Articles     Next Articles

Smoke interacts with fire history to stimulate soil seed bank germination in Mediterranean woodlands

Neta Manela1,*, Ella Dagon2, Hagai Semesh2 and Ofer Ovadia1,*   

  1. 1 Department of Life Sciences, Ben-Gurion University of the Negev, 84105 Beer-Sheva, Israel
    2 Department of Environmental Sciences, Tel-Hai College, Upper Galilee, Israel
    *Correspondence address. Department of Life Sciences, Ben-Gurion University of the Negev, 84105 Beer-Sheva, Israel. Tel: +972-8-6461359; Fax: +972-8-6472648; E-mail: netamane@post.bgu.ac.il; oferovad@bgu.ac.il
  • Received:2018-05-29 Revised:2018-11-13 Accepted:2018-12-04 Online:2019-05-15 Published:2019-07-01

Abstract:

Aims

Fire has important consequences on vegetation dynamics. In fire-prone areas, natural selection favors plant species, characterized by a large soil seed bank, and that their germination is stimulated by fire. Although seed germination stimulated by fire heat is common in the eastern Mediterranean Basin, only little is known about germination stimulation by smoke. We examined the interactive effect of aerosol smoke and fire history on the germinable soil seed bank (GSSB) community in eastern Mediterranean woodlands.

Methods

We collected soil samples from sites that have been subjected to different fire frequencies during the last four decades and exposed them to aerosol smoke, with or without watering. By documenting the seed germination patterns characterizing these samples, we could test for changes in the abundance and richness of the germinable seeds in the soil.

Important Findings

Total GSSB density was higher in sites that were burned more frequently during the last four decades. Exposure to aerosol smoke increased the GSSB density, and this pattern was more pronounced in samples originating from sites burned more frequently, as well as among annual species. Notably, exposing wet samples to aerosol smoke caused a significant reduction in GSSB density and richness. These results highlight the importance of exploring germination responses using intact soil samples, rather than synthetic seed communities. Moreover, our findings emphasize the important role smoke plays in shaping post-fire succession processes in the Mediterranean Basin, mainly by stimulating the germination of annual species.

Key words: aerosol smoke, Anagallis arvensis, annuals, historic fire regime, Mediterranean ecosystems

[1] Jörg Müller, Johannes Heinze, Jasmin Joshi, Steffen Boch, Valentin H. Klaus, Markus Fischer, Daniel Prati. Influence of experimental soil disturbances on the diversity of plants in agricultural grasslands [J]. J Plant Ecol, 2014, 7(6): 509-517.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] . [J]. Chin Bull Bot, 1996, 13(专辑): 76 .
[2] . [J]. Chin Bull Bot, 2002, 19(01): 121 -124 .
[3] ZHANG Shi-Gong;GAO Ji-Yin and SONG Jing-Zhi. Effects of Betaine on Activities of Membrane Protective Enzymes in Wheat (Triticum aestivum L.) Seedlings Under NaCl Stress[J]. Chin Bull Bot, 1999, 16(04): 429 -432 .
[4] HE Wei-Ming and ZHONG Zhang-Cheng. Effects of Soil Fertility on Gynostemma pentaphyllum Makino Population Behavior[J]. Chin Bull Bot, 1999, 16(04): 425 -428 .
[5] SHE Chao-WenSONG Yun-Chun LIU Li-Hua. Analysis on the G_banded Karyotypes and Its Fluctuation at Different Mitotic Phases and Stages in Triticum tauschii (Aegilops squarrosa)[J]. Chin Bull Bot, 2001, 18(06): 727 -734 .
[6] Guijun Yang, Wenjiang Huang, Jihua Wang, Zhurong Xing. Inversion of Forest Leaf Area Index Calculated from Multi-source and Multi-angle Remote Sensing Data[J]. Chin Bull Bot, 2010, 45(05): 566 -578 .
[7] Man Chen, YishengTu, Linan Ye, Biyun Yang. Effect of Amino Acids on Thallus Growth and Huperzine-A Accumulation in Huperzia serrata[J]. Chin Bull Bot, 2017, 52(2): 218 -224 .
[8] Yefei Shang, Ming Li, Bo Ding, Hao Niu, Zhenning Yang, Xiaoqiang Chen, Gaoyi Cao, Xiaodong Xie. Advances in Auxin Regulation of Plant Stomatal Development[J]. Chin Bull Bot, 2017, 52(2): 235 -240 .
[9] CUI Xiao-Yong, Du Zhan-Chi, Wang Yan-Fen. Photosynthetic Characteristics of a Semi-arid Sandy Grassland Community in Inner Mongolia[J]. Chin J Plan Ecolo, 2000, 24(5): 541 -546 .
[10] LI Wei, ZHANG Ya-Li, HU Yuan-Yuan, YANG Mei-Sen, WU Jie, and ZHANG Wang-Feng. Research on the photoprotection and photosynthesis characteristics of young cotton leaves under field conditions[J]. Chin J Plan Ecolo, 2012, 36(7): 662 -670 .