一种严重濒危植物——金银花(仙人掌科)的长期生存前景

IF 2.8 2区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION
Peter Stiling, Janice Duquesnel, Gordon Fox
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引用次数: 0

摘要

信号仙人掌,Consolea corallicola,是一种濒临灭绝的树仙人掌,仅在佛罗里达群岛的两个地方特有。自20世纪80年代以来,它一直受到一种以仙人掌为食的飞蛾的入侵和腐烂的威胁,最近又受到海平面上升的威胁。在1996年至2017年期间,我们在下礁岛的10个不同地点种植了641棵繁殖仙人掌,在上礁岛的19个地点种植了632棵仙人掌,以增加种群规模。一些网站得到了积极的管理,而另一些则没有。外植仙人掌的持久性较差,17个地点没有长期成活率,其他大多数地点成活率较低。成乳母细胞病占死亡人数的9%,但由一种致病真菌尖孢镰刀菌引起的冠腐病是主要死亡原因,占死亡人数的77%。土壤湿度升高可能会导致高水平的冠腐病。保护仙人掌免受成乳杆菌感染的笼子和施肥以减轻冠腐病的影响并没有提高存活率。观察到的盐水入侵和风暴分别杀死了6%和4%的仙人掌。总的来说,水位和土壤湿度的增加可能是我们种植的仙人掌死亡的87%的原因。在积极管理地点的仙人掌并不比那些没有积极管理的仙人掌存活得更好。考虑到海平面上升、风暴强度和风暴频率增加的可能性,未来拯救这种标志性植物免于灭绝的策略应该包括在海拔较高的地方种植更多的植物,在海拔较高的地方种植尽可能多的个体,同时更多地考虑其近亲的生态学和遗传学。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Prospects for the long-term persistence of a severely endangered plant, Consolea corallicola (Cactaceae)

Prospects for the long-term persistence of a severely endangered plant, Consolea corallicola (Cactaceae)

The semaphore cactus, Consolea corallicola, is an endangered tree cactus endemic to just two sites in the Florida Keys. Since the 1980s, it has been threatened by the arrival of an invasive cactus-eating moth, Cactoblastis cactorum, rot, and, more recently, by sea level rise. Between 1996 and 2017, we outplanted 641 propagated cacti at 10 different sites in the Lower Keys and 632 cacti at 19 sites in the Upper Keys in an effort to increase the population size. Some sites were actively managed, and others were not. Persistence of outplanted cacti was poor, with no long-term survival at 17 sites and low survival at most others. Cactoblastis accounted for 9% of deaths, but crown rot, caused by a pathogenic fungus, Fusarium oxysporum, was the leading cause of death, accounting for 77% of mortality. Elevated soil moisture likely contributes to the high levels of crown rot. Cages to protect cacti from Cactoblastis and fertilization to alleviate the effects of crown rot did not increase survival rates. Observed saltwater intrusion and storms killed an additional 6% and 4% of cacti, respectively. Taken together as a whole, increased water levels and soil moisture are likely responsible for 87% of the mortality of our outplanted cacti. Cacti at actively managed sites did not survive better than those that were not actively managed. Given the likelihood of increasing sea levels, storm strength, and storm frequency, future strategies to save this iconic plant from extinction should include more outplantings at higher elevation sites, with as many individuals as possible, on higher ground with more consideration given to the ecology and genetics of its close relatives.

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来源期刊
Conservation Science and Practice
Conservation Science and Practice BIODIVERSITY CONSERVATION-
CiteScore
5.50
自引率
6.50%
发文量
240
审稿时长
10 weeks
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