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Artificial substrates as sampling devices for marine epibenthic fauna: A quest for standardization
Regional Studies in Marine Science ( IF 2.1 ) Pub Date : 2020-05-30 , DOI: 10.1016/j.rsma.2020.101331
Diego Carreira-Flores , Regina Neto , Hugo Ferreira , Edna Cabecinha , Guillermo Díaz-Agras , Pedro T. Gomes

In temperate regions, macroalgae are naturally abundant habitat builders for many organisms of ecological and economic importance. Hence, macroalgae are good targets for monitoring studies based on colonization processes as, through them, it is possible to sample the epifauna that uses them as habitat. Nevertheless, macroalgae collection may not be sustainable, can compromise the survival of the target macroalgae populations and destroy fragile or threatened communities.

The search for an adequate procedure that can overcome the problems related to destructive quantitative sampling of the epifauna associated with macroalgae and the development of a methodology that can be used for comparative macrofauna monitoring, regardless of the location, were the motivations for this study. The evaluation of the mobile epifauna associated with Artificial Substrates (AS) with different degrees of complexity and natural subtidal macroalgae was implemented, as a means to evaluate the viability of AS as an alternative approach for epifauna monitoring.

Cystoseira baccata and Halidrys siliquosa were chosen as natural macroalgae. The hypotheses tested were (1) macroalgae and AS with similar structure will support similar assemblages of mobile epifauna; (2) different complexity AS will shelter different assemblages of mobile epifauna. The results obtained after 3 and 6 months showed that AS and macroalgae, both with similar structure, supported different assemblages of mobile epifauna, differing also when the time factor is considered. Moreover, different complexity AS supported different epifaunal assemblages. Our results also show that a period of colonization of 3 months was enough to accurately discriminate locations but the 3 additional months reinforce these differences and provide more coherent results with the species colonizing natural macroalgae in both locations studied. Hence, AS could be used as a valid, replicable, standard and representative alternative tool for monitoring studies.



中文翻译:

人工基质作为海洋表皮动物的采样设备:对标准化的追求

在温带地区,大型藻类对于许多具有生态和经济重要性的生物体自然是丰富的栖息地建设者。因此,大型藻类是监测基于定殖过程的研究的良好目标,因为通过它们,可以取样将它们用作栖息地的表生动物。然而,大型藻类的收集可能不可持续,可能损害目标大型藻类种群的生存并破坏脆弱或受威胁的社区。

寻找一种适当的程序以克服与大型藻类相关的大型浮游动物的破坏性定量采样相关的问题,以及开发一种可用于比较大型浮游动物监测的方法,无论其位置如何,都是本研究的动机。评估了与复杂程度不同的人工基质(AS)和天然潮下大型藻类相关的活动浮游动物,以此作为评估浮游动物监测替代方法AS可行性的一种手段。

氏半胱氨酸硅藻被选为天然大型藻类。检验的假设是:(1)具有相似结构的大型藻类和AS将支持相似的活动动物群落。(2)不同的复杂度AS将容纳不同种类的活动动物。3和6个月后获得的结果表明,具有相似结构的AS和大型藻类支持不同的活动动物群落,并且在考虑时间因素时也不同。此外,不同的复杂度AS支持不同的表皮组合。我们的研究结果还表明,定居3个月的时间足以准确地区分位置,但再过3个月,这些差异就得到了加强,并且在两个地点研究的自然藻类定殖物种均提供了更加连贯的结果。因此,AS可以用作有效的,可复制的,

更新日期:2020-05-30
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