globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13658
论文题名:
Intra-annual plasticity of growth mediates drought resilience over multiple years in tropical seedling communities
作者: O'Brien M.J.; Ong R.; Reynolds G.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
卷: 23, 期:10
起始页码: 4235
结束页码: 4244
语种: 英语
英文关键词: climate change ; drought frequency ; forest dynamics ; phenological shifts ; plant–climate interactions ; recovery ; resistance
英文摘要: Precipitation patterns are changing across the globe causing more severe and frequent drought for many forest ecosystems. Although research has focused on the resistance of tree populations and communities to these novel precipitation regimes, resilience of forests is also contingent on recovery following drought, which remains poorly understood, especially in aseasonal tropical forests. We used rainfall exclusion shelters to manipulate the interannual frequency of drought for diverse seedling communities in a tropical forest and assessed resistance, recovery and resilience of seedling growth and mortality relative to everwet conditions. We found seedlings exposed to recurrent periods of drought altered their growth rates throughout the year relative to seedlings in everwet conditions. During drought periods, seedlings grew slower than seedlings in everwet conditions (i.e., resistance phase) while compensating with faster growth after drought (i.e., recovery phase). However, the response to frequent drought was species dependent as some species grew significantly slower with frequent drought relative to everwet conditions while others grew faster with frequent drought due to overcompensating growth during the recovery phase. In contrast, mortality was unrelated to rainfall conditions and instead correlated with differences in light. Intra-annual plasticity of growth and increased annual growth of some species led to an overall maintenance of growth rates of tropical seedling communities in response to more frequent drought. These results suggest these communities can potentially adapt to predicted climate change scenarios and that plasticity in the growth of species, and not solely changes in mortality rates among species, may contribute to shifts in community composition under drought. © 2017 John Wiley & Sons Ltd
资助项目: MOB was supported by the Stiefel-Zangger fund and a Swiss National Science Foundation Mobility Fellowship (P2ZHP3_161986 and P300PA_167758). This work contributes to the University Research Priority Program on Global Change and Biodiversity at the University of Zurich. The Southeast Asia Rainforest Research Partnership contributed to the field work with research assistant support, especially from Musa, Udin, Achung, Fauzi, Asri, Weldy, Vendi, Redley, Eglee, Danil, Remy, Abu, Jude, Jolu and Philip. We thank Erick Calderon for feedback and Cam Wagg for revisions on earlier versions of the manuscript. This is article number 17 of the Sabah Biodiversity Experiment.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60790
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作者单位: Estación Experimental de Zonas Áridas, Consejo Superior de Investigaciones Científicas, La Cañada, Almería, Spain; South East Asia Rainforest Research Partnership (SEARRP), Danum Valley Field Centre, Lahad Datu, Sabah, Malaysia; Forest Research Centre, Sepilok, Sandakan, Sabah, Malaysia

Recommended Citation:
O'Brien M.J.,Ong R.,Reynolds G.. Intra-annual plasticity of growth mediates drought resilience over multiple years in tropical seedling communities[J]. Global Change Biology,2017-01-01,23(10)
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