过度开发的海洋种群的弹性和恢复
Philipp Neubauer1, Olaf P Jensen, Jeffrey A Hutchings
1Institute of Marine and Coastal Sciences, Rutgers University, New Brunswick, NJ 08901, USA. neubauer.phil@gmail.com
概括
被适度过度捕捞的海洋种群表现出更强的弹性,以便迅速恢复. 然而,强烈的开发推迟了重建,并增加了耗尽库存的恢复不确定性.
科学领域:
- 海洋生物学 海洋生物学
- 渔业 科学 渔业 科学
- 生态生态学 生态生态学
背景情况:
- 大多数过度开发的海洋种群表现出缓慢的恢复,并且仍然低于目标生物质水平.
- 一个关键的问题是,缓慢的复苏是否源于不充分的收获率下降或人口性降低.
研究的目的:
- 调查过度捕捞水平,人口弹性和海洋种群恢复潜力之间的关系.
- 确定影响过度捕捞鱼种群恢复速度和确定性的因素.
主要方法:
- 进行过度捕捞鱼类种群的全球元分析.
- 分析了渔业强度,生物质水平,生命历史特征和恢复时间的数据.
主要成果:
- 经历中等过度捕捞的海洋种群表现出增强的弹性,表明迅速恢复的潜力.
- 长期的,强烈的过度开发,特别是对于崩的库存,显著延迟的重建和恢复时间表的不确定性增加.
- 观察到渔业和生命历史特征的可预测影响,但强烈的开发加剧了恢复的不可预测性.
结论:
- 降低捕捞率对于减轻枯竭海洋种群的恢复不确定性至关重要.
- 目前的捕捞水平和低生物量使得世界上大量过度捕捞的鱼类种群的恢复不太可能.
- 虽然适度的过度捕捞可能不会削弱弹性,但强烈和长期的捕捞对海洋生态系统的恢复构成重大威胁.
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