Hot and fast: seed ecology for restoration relevant species in the Argyle region of the east Kimberley, Australia

IF 2.8 3区 环境科学与生态学 Q2 ECOLOGY Restoration Ecology Pub Date : 2024-06-25 DOI:10.1111/rec.14201
Michael Just, Bradley Albert, Simone Pedrini, Shane Turner, Kingsley Dixon
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Abstract

This study investigates the germination requirements of 12 plant species native to the Argyle region of the east Kimberley, a biodiverse monsoonal tropical region characterized by high temperatures, high evaporation, and episodic seasonal rainfall. The research involved quality assessment of mature seeds, followed by dormancy alleviation and laboratory‐based germination to determine the responses of seeds to a range of temperatures (5–40°C) in terms of germination speed (T10), mean germination time, and maximum germination proportion. Data were then modeled to calculate the optimal temperature to support germination for each species. The results showed that germination rapidly commences in response to a wide range of temperatures typical of the wet season (November–February) in the east Kimberley, though germination for most species was still high (>50%) after exposure to temperatures as low as 15°C. Mean optimal temperature for germination across all species was 25.8 ± 1.5°C, with minimal variation between most species, the exception being Dodonaea physocarpa, which preferred cooler temperatures (Topt = 14.0°C). The speed of germination was also rapid (T10 = 1–3 days) across all species at the optimal germination temperature. The findings suggest that temperature is not a limiting factor for germination in this region and that the onset and intensity of the wet season are the most significant factors determining successful germination, emergence, and seedling establishment. The study underscores the importance of species‐specific understanding of environmental temperatures required for seed germination in seed‐based restoration efforts and informs the planning of direct seeding works, thus enhancing restoration outcomes.
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又热又快:澳大利亚金伯利东部阿盖尔地区相关恢复物种的种子生态学
该研究调查了原产于金伯利东部阿盖尔地区的 12 种植物的萌发要求,该地区是一个生物多样性丰富的季风性热带地区,特点是高温、高蒸发和偶发性季节降雨。研究包括对成熟种子进行质量评估,然后进行休眠缓解和实验室催芽,以确定种子在一系列温度(5-40°C)下对发芽速度(T10)、平均发芽时间和最大发芽比例的反应。然后建立数据模型,计算出支持每个物种萌发的最佳温度。结果表明,在金伯利东部典型的雨季(11 月至次年 2 月)的各种温度条件下,发芽速度都很快,但大多数物种在低至 15°C 的温度条件下发芽率仍然很高(50%)。所有物种的平均最适宜发芽温度为 25.8 ± 1.5°C,大多数物种之间的差异很小,但 Dodonaea physocarpa 是个例外,它更喜欢较低的温度(Topt = 14.0°C)。在最佳发芽温度下,所有物种的发芽速度都很快(T10 = 1-3 天)。研究结果表明,温度并不是该地区萌芽的限制因素,雨季的开始和强度才是决定萌芽、出苗和成苗成功与否的最重要因素。这项研究强调了在以种子为基础的恢复工作中,针对具体物种了解种子萌发所需的环境温度的重要性,并为直接播种工程的规划提供信息,从而提高恢复效果。
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来源期刊
Restoration Ecology
Restoration Ecology 环境科学-生态学
CiteScore
6.50
自引率
15.60%
发文量
226
审稿时长
12-24 weeks
期刊介绍: Restoration Ecology fosters the exchange of ideas among the many disciplines involved with ecological restoration. Addressing global concerns and communicating them to the international research community and restoration practitioners, the journal is at the forefront of a vital new direction in science, ecology, and policy. Original papers describe experimental, observational, and theoretical studies on terrestrial, marine, and freshwater systems, and are considered without taxonomic bias. Contributions span the natural sciences, including ecological and biological aspects, as well as the restoration of soil, air and water when set in an ecological context; and the social sciences, including cultural, philosophical, political, educational, economic and historical aspects. Edited by a distinguished panel, the journal continues to be a major conduit for researchers to publish their findings in the fight to not only halt ecological damage, but also to ultimately reverse it.
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