气候变化领域集成服务门户(CCPortal): Same, same, but different: dissimilarities in the hydrothermal germination performance of range-restricted endemics emerge despite microclimatic similarities

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DOI	10.1093/conphys/coae009
	Same, same, but different: dissimilarities in the hydrothermal germination performance of range-restricted endemics emerge despite microclimatic similarities
	Rajapakshe, Rajapakshe P. V. G. S. W.; Tomlinson, Sean; Tudor, Emily P.; Turner, Shane R.; Elliott, Carole P.; Lewandrowski, Wolfgang
发表日期	2024
ISSN	2051-1434
起始页码	12
结束页码	1
卷号	12 期号:1
英文摘要	Seed germination responses for most narrow-range endemic species are poorly understood, imperilling their conservation management in the face of warming and drying terrestrial ecosystems. We quantified the realized microclimatic niches and the hydrothermal germination thresholds in four threatened taxa (Tetratheca erubescens, Tetratheca harperi, Tetratheca paynterae subsp. paynterae and Tetratheca aphylla subsp. aphylla) that are restricted to individual Banded Ironstone Formations in Western Australia. While T. aphylla subsp. aphylla largely failed to germinate in our trials, all other species demonstrated extended hydrothermal time accumulation (186-500 degrees C MPa days), cool minimum temperatures (7.8-8.5 degrees C), but broad base water potential thresholds (-2.46 to -5.41 MPa) under which germination occurred. These slow germination dynamics are suggestive of cool and wet winter months, where soil moisture is retained to a greater capacity in local microsites where these species occur, rather than the warmer and drier conditions in the surrounding arid environment. Hydrothermal time-to-event modelling showed that each species occupied unique hydrothermal germination niches, which correspond with the microclimatic differences the species are exposed to. Our results provide a baseline understanding for environmental and germination thresholds that govern the recruitment, and ultimately the population structure and persistence, of these short-range endemic plants. In addition, our results can aid future conservation, as well as restoration actions such as translocation to bolster population numbers and to mitigate against losses due to anthropogenic disturbance and global environmental change.
英文关键词	Hydrothermal performance; physiological seed dormancy; seed biology; Tetratheca; threatened species conservation
语种	英语
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology ; Physiology
WOS类目	Biodiversity Conservation ; Ecology ; Environmental Sciences ; Physiology
WOS记录号	WOS:001167996600001
来源期刊	CONSERVATION PHYSIOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/299806
作者单位	Curtin University; Curtin University; University of Adelaide; University of Western Australia
推荐引用方式 GB/T 7714	Rajapakshe, Rajapakshe P. V. G. S. W.,Tomlinson, Sean,Tudor, Emily P.,et al. Same, same, but different: dissimilarities in the hydrothermal germination performance of range-restricted endemics emerge despite microclimatic similarities[J],2024,12(1).
APA	Rajapakshe, Rajapakshe P. V. G. S. W.,Tomlinson, Sean,Tudor, Emily P.,Turner, Shane R.,Elliott, Carole P.,&Lewandrowski, Wolfgang.(2024).Same, same, but different: dissimilarities in the hydrothermal germination performance of range-restricted endemics emerge despite microclimatic similarities.CONSERVATION PHYSIOLOGY,12(1).
MLA	Rajapakshe, Rajapakshe P. V. G. S. W.,et al."Same, same, but different: dissimilarities in the hydrothermal germination performance of range-restricted endemics emerge despite microclimatic similarities".CONSERVATION PHYSIOLOGY 12.1(2024).