Department of Biology & CESAM & ECOMARE, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal.
Centre for Functional Ecology - CFE, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456, Coimbra, Portugal.
Sci Rep. 2018 Nov 15;8(1):16901. doi: 10.1038/s41598-018-34556-8.
The main objective of this study was to evaluate the functional traits regarding bioturbation activity and its influence in the nutrient cycling of the native clam species Ruditapes decussatus and the invasive species Ruditapes philippinarum in Ria de Aveiro lagoon. Presently, these species live in sympatry and the impact of the invasive species was evaluated under controlled microcosmos setting, through combined/manipulated ratios of both species, including monospecific scenarios and a control without bivalves. Bioturbation intensity was measured by maximum, median and mean mix depth of particle redistribution, as well as by Surface Boundary Roughness (SBR), using time-lapse fluorescent sediment profile imaging (f-SPI) analysis, through the use of luminophores. Water nutrient concentrations (NH-N, NO-N and PO-P) were also evaluated. This study showed that there were no significant differences in the maximum, median and mean mix depth of particle redistribution, SBR and water nutrient concentrations between the different ratios of clam species tested. Significant differences were only recorded between the control treatment (no bivalves) and those with bivalves. Thus, according to the present work, in a scenario of potential replacement of the native species by the invasive species, no significant differences are anticipated in short- and long-term regarding the tested functional traits.
本研究的主要目的是评估生物扰动活性的功能特征及其对亚得里亚海泻湖本地贻贝物种 Ruditapes decussatus 和入侵物种 Ruditapes philippinarum 的养分循环的影响。目前，这两个物种共存，通过控制微宇宙设置评估入侵物种的影响，包括两种物种的组合/操纵比例，包括单物种情况和没有双壳类动物的对照。生物扰动强度通过最大、中位数和平均颗粒再分布混合深度以及表面边界粗糙度 (SBR) 来测量，使用延时荧光沉积物剖面成像 (f-SPI) 分析，通过使用荧光粉。还评估了水营养物浓度 (NH-N、NO-N 和 PO-P)。本研究表明，在所测试的贻贝物种不同比例之间，最大、中位数和平均颗粒再分布混合深度、SBR 和水营养物浓度没有显著差异。仅在无双壳类动物的对照处理和有双壳类动物的处理之间记录到显著差异。因此，根据本工作，在本地物种被入侵物种替代的潜在情况下，在所测试的功能特征方面，短期内和长期内预计不会有显著差异。
