Assessing the Old-Growth Dependency of Two Saproxylic Beetle Species in the Southern Appalachian Mountains
Assessing the Old-Growth Dependency of Two Saproxylic Beetle Species in the Southern Appalachian Mountains
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评估南阿巴拉契亚山脉两种腐木甲虫物种的古老依赖性
DOI：
10.1093/isd/ixac012
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发表时间：
2022
影响因子：
3.4
通讯作者：
McHugh, Joseph V
中科院分区：
文献类型：
--
作者：
Traylor, Clayton R;Caterino, Michael S;Ulyshen, Michael D;Ferro, Michael L;McHugh, Joseph V
在20世纪初，阿巴拉契亚山脉南部被大量砍伐，只留下很少的原始森林。该地区的大部分地区现在是二次生长的森林，可能不适合专门的物种。此外，如果合适的栖息地存在，分散性差的物种可能无法殖民it.To调查这一点，我们评估了大烟山国家公园的分布和老年人的依赖性的两个低流动性的sacetylicbeetles。利用实地调查和社区科学数据，我们发现Megalodacne英雄（说1823年）（鞘翅目：Erotylidae）仅限于较低的海拔，无论干扰的历史，whilealopsis obcordata（Kirby 1837年）（鞘翅目：Zopheridae）被限制在内部或附近的古老的森林。虽然树木一般较小的第二次增长，我们发现没有栖息地限制为P。obcordata：真菌宿主存在于第二生长区，甲虫存在于直径小至11厘米的树木上。这表明它的分布是由其低的扩散能力和需要的时间连续性的枯枝栖息地，因此有资格作为指示种。对于P。obcordata，旧的增长作为避难所期间，在20世纪初，人为干扰，虽然我们可以得出结论moutM。heros从我们的数据集。物种之间对人类干扰的敏感性差异可能与它们的相对扩散能力有关：P. obcordata完全不会飞，而M.能飞行的海象。这项研究强调了使用有限的扩散能力的saponylic无脊椎动物的价值，评估人为森林干扰的影响。
The southern Appalachian Mountains were intensively logged during the early 1900s, leaving little remaining old-growth forest. Much of the region is now second-growth forest, which may not be suitable to specialist saproxylic species. Moreover, if suitable habitat exists, poorly dispersing species may not be able to colonize it. To investigate this, we assessed the distribution and old-growth dependency of two low-mobility saproxylic beetles in Great Smoky Mountains National Park. Using both field surveys and community science data, we foundMegalodacne heros(Say 1823) (Coleoptera: Erotylidae) to be limited to lower elevations regardless of disturbance history, whilePhellopsis obcordata(Kirby 1837) (Coleoptera: Zopheridae) was restricted to inside or near old-growth forests. Although trees were generally smaller in second-growth, we detected no habitat limitation forP. obcordata: fungal hosts were present in second-growth areas and the beetle was present on trees as small as 11 cm in diameter. This suggests its distribution is shaped by its low dispersal capability and need for temporal continuity of deadwood habitat, therefore qualifying it as an indicator species. ForP. obcordata, old-growth acted as refugia during landscape-wide, anthropogenic disturbances in the early 1900s, though we can draw no conclusions aboutM. herosfrom our dataset. The difference in sensitivity to human disturbance displayed between species may be linked to their relative dispersal abilities:P. obcordatais entirely flightless whileM. herosis capable of some flight. This study highlights the value of using saproxylic invertebrates with limited dispersal ability for assessing impacts from anthropogenic forest disturbances.
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