Lava crickets ( Caconemobius spp.) on Hawai'i Island: first colonisers or persisters in extreme habitats?
Lava crickets ( Caconemobius spp.) on Hawai'i Island: first colonisers or persisters in extreme habitats?
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夏威夷岛上的熔岩蟋蟀（Caconemobius spp.）：极端栖息地的第一批殖民者还是持久者？
DOI：
10.1111/een.13011
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发表时间：
2021
影响因子：
2.2
通讯作者：
Zuk, Marlene
中科院分区：
文献类型：
--
作者：
Heinen‐Kay, Justa L.;Rotenberry, John T.;Kay, Adam D.;Zuk, Marlene
火山喷发后的初次演替是一个主要的生态过程，但人们对在植物形成之前在贫瘠熔岩中定居的昆虫知之甚少。 2. 在夏威夷岛上，当地特有的蟋蟀 Caconemobius fori Gurney & Rentz，1978 年被认为是基拉韦厄火山喷发后第一种在熔岩中定居的多细胞生命形式。在科纳地区，一种同系物 Caconemobius anahulu Otte, 1994 栖息在来自花拉莱火山的无植被熔岩流中，但关于其分布的记录很少。 3. 我们的目的是表征 Caconemobius spp 的存在/不存在。熔岩流基本上没有植被，但自喷发以来的年龄和与较早熔岩流的连通性不同。我们使用诱饵活体诱捕器调查了 9 个月至 50 年历史的基拉韦厄熔岩流中的 C. fori，以及～ 220 年历史的华拉莱熔岩流中的 C. anahulu。 4. 我们没有发现任何证据表明 C. fori 在 2018 年喷发后已经在基拉韦厄火山流中定居。然而，我们确实发现 C. fori 在夏威夷火山国家公园内长达 50 年的基拉韦厄熔岩中持久存在且广泛分布。我们还在科纳调查的大部分华拉莱熔岩流中捕获了 C. anahulu。 5. 我们证明，与之前的报道相反，C. fori 并不总是在喷发后几个月内到达新的熔岩，并且 C. fori 和 C. anahulu 在熔岩上停留的时间比之前预计的要长。对于这些地方性蟋蟀的持续存在，植被演替状态可能比真实年龄更重要。
Primary succession after a volcanic eruption is a major ecological process, but relatively little is known about insects that colonise barren lava before plants become established. 2. On Hawai'i Island, the endemic cricket, Caconemobius fori Gurney & Rentz, 1978, is known as the first multicellular life form to colonise lava after an eruption from Kīlauea Volcano. In the Kona region, a congener, Caconemobius anahulu Otte, 1994 inhabits unvegetated lava flows from Hualālai Volcano, but little has been documented about its distribution. 3. Our aim was to characterise the presence/absence of Caconemobius spp. across lava flows that are largely unvegetated, but differ in age since eruption and connectivity to older flows. We used baited live traps to survey 9 month–50 year‐old Kīlauea lava flows for C. fori, and∼ 220 year‐old Hualālai lava flows for C. anahulu. 4. We found no evidence that C. fori has colonised the Kīlauea flows from the 2018 eruption. However, we did discover that C. fori was persistent and widespread on Kīlauea lava up to 50 years old within Hawai'i Volcanos National Park. We also captured C. anahulu across much of the Hualālai lava flows we surveyed in Kona. 5. We demonstrated that C. fori do not always arrive on new lava within months after an eruption, in contrast to previous reports, and that both C. fori and C. anahulu can remain on lava longer than previously appreciated. Vegetation successional state may be more important than true age for the persistence of these endemic crickets.