Arid
DOI10.1071/BT17155
Seed ecology informs restoration approaches for threatened species in water-limited environments: a case study on the short-range Banded Ironstone endemic Ricinocarpos brevis (Euphorbiaceae)
Turner, Shane R.1,2; Lewandrowski, Wolfgang1,2; Elliott, Carole P.1,2; Merino-Martin, Luis1,2,3; Miller, Ben P.1,2; Stevens, Jason C.1,2; Erickson, Todd E.1,2; Merritt, David J.1,2
通讯作者Turner, Shane R.
来源期刊AUSTRALIAN JOURNAL OF BOTANY
ISSN0067-1924
EISSN1444-9862
出版年2017
卷号65期号:8页码:661-677
英文摘要

Translocation of threatened species is challenging in semiarid environments, especially when seeds are the principal means of in situ establishment. Worldwide, the overall success of translocations using seeds is highly variable and generally unpredictable. Most seed-based translocations are embarked upon with limited understanding of the species’ seed biology or the nuances of the local abiotic environment in which to guide restoration approaches. For instance, within Australia just 14% of threatened species translocations use directly sown seeds and consequently, to improve the chances of restoration success, both the seed biology and the influence of the abiotic environment need to be adequately understood. We investigated these aspects in Ricinocarpos brevis R.J.F.Hend.& Mollemans - a short-range Banded Ironstone endemic - by focusing on a series of laboratory and field experiments to understand the key drivers of dormancy alleviation and germination promotion, as well as in-situ conditions of natural and recipient translocation sites. Fresh seeds were found to have high viability, fully developed linear embryos and possess physiological dormancy, with enhanced germination when exposed to smoke water, karrikinolide (KAR(1)) and gibberellic acid (GA(3)). Under laboratory conditions, seeds germinated over a range of temperatures (15 - 30 degrees C), but germination was suppressed by light and highly sensitive to water stress. Seeds had reduced germination when sown on the soil surface, but could emerge from up to 13 cm in depth. Under field conditions, in-situ emergence was <2%. Using in-situ emergence results, soil loggers and rainfall data, we developed a model of the recruitment bottlenecks faced by this species under in-situ conditions, an approach that provides useful insights to assist future translocations. Understanding seed biology and seed ecology enables better insights into the principal bottlenecks restricting in-situ emergence and consequently restoration success, leading to the development of more effective approaches for conserving other threatened flora in future.


英文关键词conservation recruitment bottleneck rehabilitation smoke seed dormancy translocation water potential
类型Article
语种英语
国家Australia ; France
收录类别SCI-E
WOS记录号WOS:000424882300006
WOS关键词OVERCOMING PHYSIOLOGICAL DORMANCY ; CENTRAL AUSTRALIAN PLANTS ; WESTERN-AUSTRALIA ; BIODIVERSITY HOTSPOT ; IMPROVE RESTORATION ; ARID ZONE ; GERMINATION ; SMOKE ; REINTRODUCTION ; TEMPERATURE
WOS类目Plant Sciences
WOS研究方向Plant Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/197738
作者单位1.Univ Western Australia, Sch Biol Sci, Crawley, WA 6009, Australia;
2.Kings Pk & Bot Gardens, Sci Directorate, Kings Pk, WA 6005, Australia;
3.Univ Montpellier, CNRS, INRA, AMAP,CIRAD,IRD, F-34090 Montpellier, France
推荐引用方式
GB/T 7714
Turner, Shane R.,Lewandrowski, Wolfgang,Elliott, Carole P.,et al. Seed ecology informs restoration approaches for threatened species in water-limited environments: a case study on the short-range Banded Ironstone endemic Ricinocarpos brevis (Euphorbiaceae)[J],2017,65(8):661-677.
APA Turner, Shane R..,Lewandrowski, Wolfgang.,Elliott, Carole P..,Merino-Martin, Luis.,Miller, Ben P..,...&Merritt, David J..(2017).Seed ecology informs restoration approaches for threatened species in water-limited environments: a case study on the short-range Banded Ironstone endemic Ricinocarpos brevis (Euphorbiaceae).AUSTRALIAN JOURNAL OF BOTANY,65(8),661-677.
MLA Turner, Shane R.,et al."Seed ecology informs restoration approaches for threatened species in water-limited environments: a case study on the short-range Banded Ironstone endemic Ricinocarpos brevis (Euphorbiaceae)".AUSTRALIAN JOURNAL OF BOTANY 65.8(2017):661-677.
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