Advancing conservation strategies for the endangered Galapagos plant Lecocarpus lecocarpoides: insights from ex situ propagation

IF 2.6 2区 环境科学与生态学 Q2 BIODIVERSITY CONSERVATION Endangered Species Research Pub Date : 2024-08-15 DOI:10.3354/esr01352
Anna Calle-Loor, Patricia Jaramillo Díaz
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Abstract

ABSTRACT: The Galapagos Islands, renowned for their unique biodiversity, face a growing crisis, with over half of their endemic vascular plants under threat of extinction. Among the threatened flora, Lecocarpus lecocarpoides is classified as endangered, but is one of the least studied species. We present novel insights into the biology of L. lecocarpoides, acquired during the propagation of individuals for subsequent transplantation into their native habitat. The study encompasses seed viability, germination, growth, phenology, and morphology. Herbarium seeds were shown to remain viable for over 2 decades, highlighting the potential for seed bank conservation. In our germination experiment, which began with just 50 seeds, seed scarification resulted in a high germination rate of 75%. The resulting seedlings were planted in 2 sizes of pots and nurtured as seed producers. The plants in larger pots grew on average twice as tall and with nearly double the stem diameter of those in smaller pots. They yielded over 8000 seeds for conservation efforts, providing information on the development and fruit production capacity of L. lecocarpoides. We show differences in diaspore spine length between L. lecocarpoides populations, supporting the distinction of 2 L. lecocarpoides subspecies. Our findings provide essential data to inform conservation strategies for this endemic Galapagos species.
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推进加拉帕戈斯濒危植物 Lecocarpus lecocarpoides 的保护战略:异地繁殖的启示
ABSTRACT: 加拉帕戈斯群岛以其独特的生物多样性而闻名于世,但该群岛面临着日益严重的危机,半数以上的特有维管植物濒临灭绝。在濒危植物中,Lecocarpus lecocarpoides 被列为濒危物种,但却是研究最少的物种之一。我们对 L. lecocarpoides 的生物学特性提出了新的见解,这些见解是在繁殖个体以便随后移植到其原生栖息地的过程中获得的。研究内容包括种子活力、发芽、生长、物候学和形态学。标本馆种子的存活时间超过了 20 年,凸显了种子库保护的潜力。在我们的发芽实验中,一开始只有 50 粒种子,经过种子去痕后,发芽率高达 75%。获得的幼苗被种植在两种大小的花盆中,并作为种子生产者进行培育。大花盆中的植株平均长高两倍,茎直径几乎是小花盆中植株的两倍。它们为保护工作提供了 8000 多粒种子,提供了有关 L. lecocarpoides 发育和果实生产能力的信息。我们的研究结果表明,L. lecocarpoides 种群之间的子囊孢子脊长度存在差异,这支持了两个 L. lecocarpoides 亚种的区分。我们的发现为这一加拉帕戈斯特有物种的保护策略提供了重要数据。
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来源期刊
Endangered Species Research
Endangered Species Research BIODIVERSITY CONSERVATION-
CiteScore
5.50
自引率
6.50%
发文量
38
审稿时长
31 weeks
期刊介绍: ESR is international and interdisciplinary. It covers all endangered forms of life on Earth, the threats faced by species and their habitats and the necessary steps that must be undertaken to ensure their conservation. ESR publishes high quality contributions reporting research on all species (and habitats) of conservation concern, whether they be classified as Near Threatened or Threatened (Endangered or Vulnerable) by the International Union for the Conservation of Nature and Natural Resources (IUCN) or highlighted as part of national or regional conservation strategies. Submissions on all aspects of conservation science are welcome.
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