马齿苋种群现状及生态学研究。在英国

IF 1.2 3区 生物学 Q3 PLANT SCIENCES
D. Callaghan
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The species was found exclusively within perennial seepages (pH 7.4–7.6) over steep sandstone rock, where vascular plants are sparse and the most frequent bryophyte associates include Didymodon tophaceus (Brid.) Lisa, Pellia endiviifolia (Dicks.) Dumort. and Pohlia melanodon (Brid.) A.J.Shaw. Sporophytes of P. marchica in Britain have never been reported and populations seem to comprise only females. Axillary bulbils, produced abundantly, are probably of key importance for local dispersal and population maintenance. Conclusions Philonotis marchica appears to have become extinct in Yorkshire and has undergone a historical decline at Shanklin Chine, Isle of Wight. 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引用次数: 1

摘要

摘要简介马齿苔。在欧洲很罕见,濒临灭绝。在本研究中,对其在英国的地位和生态进行了调查。方法自1859年以来,在英国所有报告有马奇细脊杆菌的地点以及附近的其他地点进行了调查。用GPS单元记录殖民地的地理坐标,并用于得出分辨率为1、10和100米的被占领军械调查局网格单元的计数。记录相关物种的栖息地和群落组成。关键结果在怀特岛的两个位置相近的地点发现了马氏Philonotis marchica,共占据32个1m的网格单元。它没有在英国唯一一个以前已知的地点,即约克郡被驱回。该物种仅在陡峭砂岩上的多年生渗漏层(pH 7.4–7.6)中发现,那里的维管植物稀少,最常见的苔藓植物包括Didyodon tophaceus(Brid.)Lisa和Pellia endivifolia(Dicks.)Dumot。和黑朴丽娅(Brid.)A.J.Shaw。英国马希卡P.marchica的孢子植物从未报道过,而且种群似乎只包括雌性。大量产生的腋芽可能对当地的传播和种群维持至关重要。结论马氏Philonotis marchica似乎已在约克郡灭绝,并在怀特岛的Shanklin Chine经历了历史性的衰退。怀特岛克利夫斯湖的人口似乎是安全的,值得法定保护,因为它对马奇卡P.marchica在英国的未来生存至关重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Population status and ecology of Philonotis marchica (Hedw.) Brid. in Britain
ABSTRACT Introduction The moss Philonotis marchica (Hedw.) Brid. is rare in Europe and threatened with extinction. In this study, its status and ecology in Britain were investigated. Methods Surveys were carried out at all sites from which Philonotis marchica has been reported in Britain since 1859, together with further locations nearby. Geographical coordinates of colonies were recorded with a GPS unit and used to derive counts of occupied Ordnance Survey grid cells at resolutions of 1, 10 and 100 m. The habitat and community composition of relevés were recorded. Key results Philonotis marchica was found at two closely located sites on the Isle of Wight, occupying a total of 32 1 m grid cells. It was not refound at the only other previously known location in Britain, which is in Yorkshire. The species was found exclusively within perennial seepages (pH 7.4–7.6) over steep sandstone rock, where vascular plants are sparse and the most frequent bryophyte associates include Didymodon tophaceus (Brid.) Lisa, Pellia endiviifolia (Dicks.) Dumort. and Pohlia melanodon (Brid.) A.J.Shaw. Sporophytes of P. marchica in Britain have never been reported and populations seem to comprise only females. Axillary bulbils, produced abundantly, are probably of key importance for local dispersal and population maintenance. Conclusions Philonotis marchica appears to have become extinct in Yorkshire and has undergone a historical decline at Shanklin Chine, Isle of Wight. The population at Lake Cliffs, Isle of Wight, appears to be secure and deserves statutory protection given its key importance for the future survival of P. marchica in Britain.
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来源期刊
Journal of Bryology
Journal of Bryology 生物-植物科学
CiteScore
4.50
自引率
31.60%
发文量
20
审稿时长
3 months
期刊介绍: Journal of Bryology exists to promote the scientific study of bryophytes (mosses, peat-mosses, liverworts and hornworts) and to foster understanding of the wider aspects of bryology. Journal of Bryology is an international botanical periodical which publishes original research papers in cell biology, anatomy, development, genetics, physiology, chemistry, ecology, paleobotany, evolution, taxonomy, molecular systematics, applied biology, conservation, biomonitoring and biogeography of bryophytes, and also significant new check-lists and descriptive floras of poorly known regions and studies on the role of bryophytes in human affairs, and the lives of notable bryologists.
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