夏威夷有毒植物:物种丰富度和物种-区域关系

IF 0.7 4区 生物学 Q4 MARINE & FRESHWATER BIOLOGY
Pacific Science Pub Date : 2022-03-02 DOI:10.2984/76.1.2
D. Grayson, Heidi A. Lennstrom
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引用次数: 0

摘要

摘要:长期以来,夏威夷群岛一直被视为相对缺乏本地有毒植物物种,这是由于这个生物地理上与世隔绝的群岛缺乏草食性捕食者的结果。这种断言是主观的,没有与在这种捕食者存在下进化的植物群进行定量比较。我们通过比较夏威夷主要岛屿的本土植物群和这些岛屿的归化植物群中有毒物种的丰富性来检验这一论断。该测试表明,这一说法是正确的:归化夏威夷植物群中有毒植物物种的相对丰度几乎是夏威夷本土植物群中这些物种相对丰度的十倍。目前在这些岛屿上发现的大约150种有毒植物中,92%已经归化。本土和归化夏威夷植物物种的物种丰富度与岛屿大小呈正相关,有毒本土和有毒归化植物物种的丰富度也是如此。这些结果,以及夏威夷主要岛屿物种-区域关系中缺乏显著的残差,表明夏威夷岛的相对年轻性不需要解释该岛本地植物物种的丰富性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Hawai‘i’s Toxic Plants: Species Richness and Species–Area Relationships
Abstract: The Hawaiian Islands have long been seen as relatively devoid of native toxic plant species, a result of the paucity of herbivorous predators in this biogeographically isolated archipelago. This assertion has been subjective, without quantitative comparison to floras that evolved in the presence of such predators. We test this assertion by comparing the richness of toxic species in the native flora of the main Hawaiian Islands to that in the naturalized flora of these islands. That test shows the assertion to be correct: the relative abundance of toxic plant species in the naturalized Hawaiian flora is nearly ten times greater than the relative abundance of those species in the Hawaiian native flora. Of the approximately 150 toxic plant species now found in these islands, 92% are naturalized. The species richness of both native and naturalized Hawaiian plant species correlates positively with island size, as does the richness of toxic native and toxic naturalized plant species. These results, and the lack of significant residuals in species–area relationships across the main Hawaiian Islands, suggest that the relative youth of Hawai‘i Island is not needed to account for native plant species richness on this island.
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来源期刊
Pacific Science
Pacific Science 生物-动物学
CiteScore
1.40
自引率
14.30%
发文量
17
审稿时长
3 months
期刊介绍: Pacific Science: A Quarterly Devoted to the Biological and Physical Sciences of the Pacific Region The official journal of the Pacific Science Association. Appearing quarterly since 1947, Pacific Science is an international, multidisciplinary journal reporting research on the biological and physical sciences of the Pacific basin. It focuses on biogeography, ecology, evolution, geology and volcanology, oceanography, paleontology, and systematics. In addition to publishing original research, the journal features review articles providing a synthesis of current knowledge.
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