The Rise and Demise of the Glanville fritillary on the Isle of Wight
The Rise and Demise of the Glanville fritillary on the Isle of Wight
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DOI：
10.1007/s10841-014-9737-2
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发表时间：
2015-04-01
影响因子：
1.9
通讯作者：
Isaac, N. J. B.
中科院分区：
文献类型：
--
作者：
Curtis, R. J.;Botham, M. S.;Isaac, N. J. B.
格兰维尔贝母是英国最稀有的繁殖蝴蝶之一，主要限于怀特岛的南海岸。自1996年以来，每年都在已知地点的高比例进行监测，通过计算春季幼虫“网”的数量。在本文中，我们提出了8个核心网站的人口时间序列。据观察，在过去18年中，种群波动很大，各地点之间的同步性很高。最近，幼虫结网的数量出现了严重的下降，许多以前的据点同时发生了灭绝。我们结合联合收割机我们的网站计数数据与英国蝴蝶监测计划的五个网站的成年蝴蝶计数。总之，这些数据表明，格兰维尔贝母在怀特岛面临灭绝的威胁，用于繁殖的总面积可能不超过几公里。研究结果表明，有必要对剩余种群进行全国普查，并进一步研究，以了解下降的原因，以便制定保护恢复计划。
The Glanville fritillary is one of Britain's rarest breeding butterflies, and is predominantly restricted to the south coast of the Isle of Wight. Populations have been monitored annually at a high proportion of known sites by counting the number of larval 'webs' during spring since 1996. In this paper, we present population time series for eight core sites. Populations have been observed to fluctuate considerably over the last 18 years, with a high degree of synchrony between sites. Recently, numbers of larval webs have shown a severe decline, with simultaneous extinctions occurring across many former strongholds. We combine our web count data with counts of adult butterflies from five sites of the UK Butterfly Monitoring Scheme. Together, these data suggest that the Glanville fritillary is threatened by extinction on the Isle of Wight, and that the total area used for breeding is likely no more than a few km(2). The results flag up the need for a national census of remaining populations and further research to understand causes of decline, so that a conservation recovery plan can be developed.