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A trait‐based approach predicting community assembly and dominance of microbial invasive species
Oikos ( IF 3.4 ) Pub Date : 2021-01-21 , DOI: 10.1111/oik.07694
Carla Kruk 1, 2 , Claudia Piccini 3 , Melina Devercelli 4 , Lucía Nogueira 1 , Victoria Accattatis 4 , Lía Sampognaro 2, 5 , Angel M. Segura 5
Affiliation  

Understanding the mechanisms underlying community assembly helps to define success and susceptibility to biological invasions. Here, we explored phytoplankton community assembly following niche and neutral paradigms and using a trait‐based approach. Under the hypothesis that the morphology‐based functional groups (MBFG) clusters species with similar niche, we analysed how trait‐related differences in fitness influence dominance of an invasive species. This was based on literature review, field data and model simulations. We predict that invading species can be dominant if: 1) do not belong to the local MBFG but use unexploited areas of the niche, or 2) belong to the resident MBFG but exhibit a higher fitness due to a particular combination of traits. The invasive dinoflagellate Ceratium furcoides was used as the model species to evaluate these hypotheses, its morphological (e.g. volume) and physiological (e.g. growth rates) traits were compared with species from the same (V: photosynthetic flagellates) and different (VII: colonial cyanobacteria) MBFG. Fitness was estimated using models parametrized with MBFG rates (R*, ability to draw down phosphate) under different environmental conditions (i.e. flushing). Results contributed to support both hypotheses. First, the alternation of C. furcoides and cyanobacteria dominance was explained by the use of different niches. Secondly, species from MBFG V were dominant under similar environments. Within this group V C. furcoides showed higher fitness under low flushing and high predation, advantage provided by a distinctive combination of traits. The application of trait‐based approaches to represent the niche and estimate fitness along environmental gradients was useful to evaluate community assembly and can be used to predict the dominance of microbial species invasions.

中文翻译:

基于特征的方法预测微生物入侵物种的群落组装和优势

了解社区集会的机制有助于确定生物入侵的成功和易感性。在这里,我们探索了利基和中性范式并使用基于特征的方法进行的浮游植物群落组装。在基于形态学的功能群(MBFG)聚集具有相似生态位的物种的假设下,我们分析了适应性中与性状相关的差异如何影响入侵物种的优势。这是基于文献综述,现场数据和模型模拟。我们预测,如果:1)不属于本地MBFG,但使用生态位的未开发区域,或2)属于常住MBFG,但由于特有的性状组合,则具有较高的适应性,因此入侵物种可能占主导地位。侵入性鞭毛角叉菜将其用作模型物种以评估这些假设,并将其形态(例如体积)和生理(例如生长速率)性状与相同(V:光合鞭毛)和不同(VII:殖民地蓝细菌)MBFG的物种进行比较。使用在不同环境条件(即潮红)下用MBFG速率(R *,吸收磷酸盐的能力)参数化的模型估算适应性。结果有助于支持这两种假设。首先,通过使用不同的生态位来解释糠co假单胞菌和蓝细菌优势的交替。其次,MBFG V中的物种在相似的环境下占优势。在该组中V. Furcoides在低潮红和高捕食条件下表现出较高的适应性,这是特有的性状组合所提供的优势。基于特征的方法代表生态位并估算环境梯度的适应性对评估群落聚集非常有用,并可用于预测微生物入侵的优势。
更新日期:2021-04-01
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