恢复一种濒危的太平洋岛屿特有植物:利用遮荫和棚架系统缩短蚕桑植物幼嫩期的实验证据

IF 1.7 4区 环境科学与生态学 Q2 BIODIVERSITY CONSERVATION
T. Marler
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引用次数: 0

摘要

旨在建立种子园或恢复种植的环保主义者受益于减少树木幼龄的方法。以往的研究表明,苗木和幼树的死亡是限制极危植物大楸自然种群恢复的主要因素。为了采取有效的恢复行动,需要采取新的方法来降低树苗的死亡率。迁地试验用于确定棚架、遮荫的生长条件是否会降低连载菊幼苗的幼龄。用kanehiraserianthes kanehirae作为耐耳索菌的替代物。在不同长度(0、3、6、9或12米)的荫蔽隧道中,将茎的生长水平培养到金属网架上。记录到达每个隧道末端的时间,以及随后在充分阳光下的茎的垂直生长,直到开花开始。在12 m的隧道内,金白花幼嫩期最短,1年内(351±10天,平均±SE)可开第一朵花。幼期持续时间随着隧道长度的缩短而增加。在研究期间,对照植物没有开花。遮荫茎的水平格架支撑能有效地缩短连翘幼苗的幼期。菊科植物种子园可以使用遮荫棚架在幼树上生产种子,以迅速促进物种恢复。在有管理的保护花园中生产种子可以通过减少从原地群落中移除种子的需要来改善恢复工作。因此,这一简单的协议可能对该地区所有联邦政府列出的木本植物物种的原位和非原位保护都有益。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Towards recovery of an endangered Pacific island endemic: Experimental evidence for shortening juvenility of Serianthes plants using a shade and trellis system to generate vigorous growth and precocious flowering
Conservationists aiming to establish seed orchards or restoration plantings benefit from methods that reduce tree juvenility. Previous studies suggest that seedling and sapling mortality is the major limitation to natural population recovery of the critically endangered Serianthes nelsonii. To enable effective restoration actions new methods are required to reduce sapling mortality. Ex situ experiments were used to determine if trellised, shaded growth conditions would reduce juvenility of Serianthes saplings. Serianthes kanehirae was used as a surrogate for S. nelsonii. Stem growth was trained horizontally to a wire trellis in shaded tunnels of differing lengths (0, 3, 6, 9 or 12 m). Time to reach the end of each tunnel, and subsequent vertical stem growth in full sun were recorded until flower production commenced. The shortest S. kanehirae juvenile phase occurred under 12 m tunnels, with first flower production within a year (351 ± 10 days, mean ± SE). The juvenile phase increased in duration as tunnel length shortened. The control plants did not produce flowers during the study. Horizontal trellised support of shaded stems was effective in reducing juvenile phase duration of Serianthes saplings. Serianthes seed orchards may use shaded trellises to produce seeds on young plants to rapidly boost species recovery efforts. The production of seeds in managed conservation gardens may improve recovery efforts by reducing the need to remove seeds from in situ communities. Therefore, this simple protocol may prove beneficial for both in situ and ex situ conservation of all federally listed woody plant species in the region.
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来源期刊
Tropical Conservation Science
Tropical Conservation Science BIODIVERSITY CONSERVATION-
CiteScore
3.60
自引率
5.90%
发文量
16
审稿时长
>12 weeks
期刊介绍: Tropical Conservation Science is a peer-reviewed, open access journal that publishes original research papers and state-of-the-art reviews of broad interest to the field of conservation of tropical forests and of other tropical ecosystems.
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