Decadal-scale variability of sardine and anchovy simulated with an end-to-end coupled model of the Canary Current ecosystem
Decadal-scale variability of sardine and anchovy simulated with an end-to-end coupled model of the Canary Current ecosystem
复制标题
使用加那利海流生态系统的端到端耦合模型模拟沙丁鱼和鳀鱼的十年尺度变异
DOI：
10.1016/j.pocean.2018.12.009
复制
发表时间：
2019
影响因子：
4.1
通讯作者：
A. Rodríguez Santana
中科院分区：
文献类型：
--
作者：
J. Sánchez;F. Werner;J. Fiechter;Kenneth A. Rose;E. Curchitser;A. Ramos;J. García Lafuente;J. Arístegui;S. Hernández‐León;A. Rodríguez Santana
小的中上层鱼种，如沙丁鱼和鱼，其丰度可因气候变化而出现十年一级的剧烈变化。了解的机制和食物网的不同组成部分之间的关系，通过环境强迫可以驱动所观察到的鱼类变异仍然是一个具有挑战性的问题。本文所述的建模研究侧重于金丝雀海流系统，实施并建立在Rose等人（2015）和Fiechter等人（2015）在加州海流系统中的早期建模工作基础上。这种新的应用程序的建模框架的加那利电流系统提供了一种方法，桥梁的全面数据库与端到端（气候到鱼）建模，从而使沙丁鱼（沙丁鱼pilchardus）和鲱鱼（Engraulis encrasicolus）的变异性的来源的调查。建模工作的目的是深入了解驱动观察到的生物变异性的潜在机制。特别注意的是没有沙丁鱼和沙丁鱼在加那利电流，这是四个主要的东部边界上升流生态系统之间的一个显着特点之间的政权转移。对1958-2007年的模型进行了模拟和分析。规定沙丁鱼和沙丁鱼的加那利电流的生物学特性和行为引起不同的空间分布，其人口，并与其他东部边界上升流生态系统，同步（而不是异步）的丰度和生物量的变化。对成年种群数量异常高的增长和下降年份的分析表明，食物供应（而不是温度或其他环境驱动因素）是决定沙丁鱼（通过产卵和喂养年龄为0的个体的生存）和沙丁鱼（通过喂养年龄为0的个体的生存）招募的主要因素。沙丁鱼和凤尾鱼对食物的共同依赖，以及浮游动物对模型中产生的气候强迫的全域响应，为这两个种群的同步提供了一个合理的解释。我们的研究结果还指出，沙丁鱼和沙丁鱼之间的差异，而这两个物种的蓬勃发展下增强上升有利的风，沙丁鱼幼虫变得特别容易漂移死亡率，从而做得比沙丁鱼在更温和的上升流条件下。
Small pelagic fish species, such as sardine and anchovy, can exhibit dramatic decadal-scale shifts in abundance in response to climate variability. Understanding the mechanisms and the relationships among the different components of the food web through which environmental forcing can drive the observed fish variability remains a challenging problem. The modelling study described herein, focusing on the Canary Current System, implements and builds on earlier modelling efforts by Rose et al. (2015) and Fiechter et al. (2015) in the California Current System. This new application of the modelling framework to the Canary Current system provides an approach that bridges a comprehensive database with end-to-end (climate-to-fish) modelling, thereby enabling the investigation of the sources of variability of sardine (Sardina pilchardus) and anchovy (Engraulis encrasicolus). The aim of the modelling effort is to gain insights into the underlying mechanisms that drive the observed biological variability. Particular attention is given to the absence of regime shifts between sardine and anchovy in the Canary Current, which is a distinctive feature among the four major eastern boundary upwelling ecosystems. A model simulation for 1958–2007 was performed and analysed. The biological traits and behaviours prescribed for sardine and anchovy for the Canary Current give rise to different spatial distribution of their populations, and in contrast with other eastern boundary upwelling ecosystems, to synchronous (rather than asynchronous) variability of their abundance and biomass. Analyses of years with anomalously high increases and declines of the adult populations implicate food availability (instead of temperature or other environmental drivers) as the main factor determining recruitment for both sardine (via spawning and survival of feeding age-0 individuals) and anchovy (via survival of feeding age-0 individuals). The common dependence of sardine and anchovy on food, together with the domain-wide response of zooplankton to climate forcing generated in the model, provides a plausible explanation for the synchronization of the two populations. Our results also point at differences between sardine and anchovy; while the two species thrive under enhanced upwelling-favourable winds, anchovy larvae become particularly vulnerable to drift mortality, and thus do better than sardine under more moderate upwelling conditions.
影响因子：
2.8
作者：
Fulton, Elizabeth A.
通讯作者：
Fulton, Elizabeth A.