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Exploration of multiple post-extinction compensatory scenarios improves the likelihood of determining the most realistic ecosystem future
Environmental Research Communications ( IF 2.5 ) Pub Date : 2021-04-14 , DOI: 10.1088/2515-7620/abf468
Clement Garcia 1 , Martin Solan 2 , Stefan G. Bolam 1 , David Sivyer 1 , Ruth Parker 1 , Jasmin A Godbold 2
Affiliation  

A research agenda is currently developing around predicting the functional response of ecosystems to local alterations of biodiversity associated with anthropogenic activity, but existing conceptual and empirical frameworks do not serve this area well as most lack ecological realism. Here, in order to advance credible projections of future ecosystems, we use a trait-based model for marine benthic communities to inform how increasing trawling pressure changes the biological-mediation of seabed functioning. Our simulations reveal that local loss of species, and the associated compensatory community response, lead to multiple and disparate biogeochemical alterations that are contingent on relative vulnerabilities to extinction, environmental and biological context, and the level of functional redundancy within replacement taxa. Consequently, we find that small changes in faunal mediation caused by community re-organisation can disproportionately affect some biogeochemical components (macronutrients), whilst having less effect on others (carbon, pigments). Our observations indicate that the vulnerability of communities to future human-induced change is better established by identifying the relative magnitude and direction of covariance between community response and effect traits. Hence, projections that primarily focus on the most common or most productive species are unlikely to prove reliable in identifying the most likely ecological outcome necessary to support management strategies.



中文翻译:

对多种灭绝后补偿情景的探索提高了确定最现实生态系统未来的可能性

目前正在围绕预测生态系统对与人为活动相关的生物多样性局部变化的功能响应制定研究议程,但现有的概念和经验框架不能很好地服务于该领域,因为大多数缺乏生态现实主义。在这里,为了推进对未来生态系统的可信预测,我们使用基于特征的海洋底栖群落模型来告知增加的拖网压力如何改变海底功能的生物中介。我们的模拟表明,物种的局部损失以及相关的补偿性群落反应会导致多种不同的生物地球化学变化,这些变化取决于对灭绝的相对脆弱性、环境和生物背景,以及替代分类群内的功能冗余水平。最后,我们发现,由群落重组引起的动物区系调解的微小变化会对某些生物地球化学成分(常量营养素)产生不成比例的影响,而对其他成分(碳、色素)的影响较小。我们的观察表明,通过确定社区响应和效应特征之间协方差的相对大小和方向,可以更好地确定社区对未来人类引起的变化的脆弱性。因此,主要关注最常见或最具生产力的物种的预测在确定支持管理策略所需的最可能的生态结果方面不太可能被证明是可靠的。颜料)。我们的观察表明,通过确定社区响应和效应特征之间协方差的相对大小和方向,可以更好地确定社区对未来人类引起的变化的脆弱性。因此,主要关注最常见或最具生产力的物种的预测在确定支持管理策略所需的最可能的生态结果方面不太可能被证明是可靠的。颜料)。我们的观察表明,通过确定社区响应和效应特征之间协方差的相对大小和方向,可以更好地确定社区对未来人类引起的变化的脆弱性。因此,主要关注最常见或最具生产力的物种的预测在确定支持管理策略所需的最可能的生态结果方面不太可能被证明是可靠的。

更新日期:2021-04-14
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