佛罗里达东南部棕榈上附生蕨类Vittaria lineata与苔藓Octoblepharum albidum的关联及其伴生蕨类Phlebodium aureum的注释

Pub Date : 2022-04-26 DOI:10.1640/0002-8444-112.2.93
G. Rogers
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引用次数: 1

摘要

摘要在佛罗里达东南部,在卷心菜棕榈(Sabal palmetto)的树干上,可以明显地看到短链蕨类植物(Vittaria lineata)和泛热带苔藓(Octoblepharum albidum)之间的联系。从样方研究中可以看出,成熟的孢子体,而配子体和小孢子体的结合力频率超过了偶然预期。这种正相关关系表明苔藓促进了蕨类孢子植物的生长。根据文献综述和新的观察结果,苔藓的结构及其与线纹草根的密切关系与苔藓作为线纹草的保水“覆盖物”是一致的。在不同的生境中,线缕草可与藓类Syrrhopodon incompletus交替生长,有时生长在腐叶柄基部的残肢上,有时生长在叶柄基部的叶腋上,而不与藓类结合。在当地唯一能与线叶弧菌竞争的维管附生植物是蕨类植物金色蕨。其叶片的长度与直接相邻的棕榈叶柄-树桩的长度相关,而与lineata叶片的长度无关。在树桩较长的地方,金黄色弧菌很突出,而在没有或小叶柄树桩的树干区域,线状弧菌占主导地位,在那里,它通常与白花弧菌为伴。
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Association of Epiphytic Fern Vittaria lineata with Moss Octoblepharum albidum on Palm Sabal palmetto in Southeast Florida, with Notes on Accompanying Fern Phlebodium aureum
Abstract. In southeast Florida an association between the shoestring fern (Vittaria lineata) and the pantropical moss Octoblepharum albidum is conspicuous on cabbage palm (Sabal palmetto) trunks. As determined from quadrat studies, for maturing sporophytes, but not for gametophytes and tiny sporophytes, the frequency of association exceeded that expected by chance. The positive association suggests the moss facilitates the fern sporophytes. Based on a literature review and on new observations, the structure of the moss and its intimate relationship with V. lineata roots is consistent with the moss serving as a water-retentive “mulch” for V. lineata. In different habitats V. lineata can associate alternatively with the moss Syrrhopodon incompletus, and it sometimes grows on decaying petiole-base remnants or in petiole-base axils with no moss association. The only vascular epiphyte competing with V. lineata locally is the fern Phlebodium aureum. The lengths of its leaf blades, but not those of V. lineata, correlate with the lengths of immediately adjacent S. palmetto petiole-stumps. Phlebodium aureum is prominent where the stumps are long, whereas V. lineata dominates in trunk regions having no or small petiole-stumps, where it usually associates with O. albidum.
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