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Odonata drift: a reassessment
International Journal of Odonatology ( IF 1.0 ) Pub Date : 2020-09-30 , DOI: 10.1080/13887890.2020.1818639
Robert B. DuBois 1
Affiliation  

More than 400 scientific journal articles and gray literature reports that addressed macroinvertebrate drift were reviewed and 63 articles were found that reported on the natural drift of Odonata at some taxonomic level. Forty-three species and 44 genera within 15 families (nine Zygoptera; six Anisoptera) were documented in the drift. Drift of another 13 species and eight genera was inferred from indirect evidence. The mean drift density reported was 0.03 m–3 (range <0.001–0.153 m–3), which is relatively low, but not unexpected because benthic densities of Odonata are often lower than those of the macroinvertebrate taxa that occur more frequently in the drift. Percent composition of odonates in the total drift was invariably <10% and usually <1%, but the percent was slightly higher if expressed as biomass or volume because odonate larvae are relatively large. Most odonates that drifted were not full grown. High flows were often associated with drift of Odonata, but not exclusively so; drift was highest at night and during summer months. Accidental (catastrophic) drift and active, behavioral drift to colonize new habitats and reduce crowding are thought to be the primary causes of Odonata drift, but its ecological significance would benefit from more research. The presumption that Odonata have a low predisposition to drift is probably not uniformly accurate. Use of drift nets specifically to collect odonates is unlikely to be as efficient as other collection methods in most circumstances, but it should not be entirely dismissed because drift nets are easy to set, relatively clean to operate, do not destroy habitats, and provide integrated samples of various habitats where it might be difficult or unsafe to use other methods.

中文翻译:

蜻蜓漂移:重新评估

审查了 400 多篇涉及大型无脊椎动物漂移的科学期刊文章和灰色文献报告,发现 63 篇文章在某些分类学水平上报道了蜻蜓目自然漂移。在漂移中记录了 15 个科(9 个接合翅目;6 个异翅目)内的 43 个物种和 44 个属。从间接证据推断出另外 13 个物种和 8 个属的漂移。报告的平均漂流密度为 0.03 m–3(范围 <0.001–0.153 m–3),相对较低,但并不意外,因为蜻蜓的底栖密度通常低于在漂流中更频繁出现的大型无脊椎动物类群的密度. 总漂移量中齿状体的百分比组成总是<10%,通常<1%,但如果以生物量或体积表示,百分比略高,因为齿状幼虫相对较大。大多数漂流的齿状体没有完全长大。高流量通常与 Odonata 的漂移有关,但并非完全如此;夜间和夏季的漂移最高。偶然(灾难性)漂移和主动、行为漂移以殖民新栖息地并减少拥挤被认为是蜻蜓漂移的主要原因,但其生态意义将受益于更多的研究。Odonata 具有低漂移倾向的假设可能并不完全准确。在大多数情况下,专门使用流网收集碘化物不太可能像其他收集方法一样有效,但不应完全放弃,因为流网很容易设置,
更新日期:2020-09-30
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