捕捞对东北大西洋岩岸一种具有重要商业价值的红色大型藻类的影响

IF 4.6 Q2 MATERIALS SCIENCE, BIOMATERIALS ACS Applied Bio Materials Pub Date : 2024-06-22 DOI:10.1007/s10750-024-05591-6
Jessica Knoop, Sara Barrento, John N. Griffin
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摘要

卟吩属的红色大型藻类被广泛采集供人类食用,在北大西洋沿岸的采捕量也越来越大,但它们经受反复采捕并在自然海岸线上保持高覆盖率和丰度的能力仍未得到充分探索,这引起了人们对可持续发展的关注。因此,我们在英国南威尔士一个以商业捕捞为生的种群中调查了频繁的人工采伐对卟吩草的影响。我们在春季设置了 12 个对照小区和 12 个处理小区,在秋季设置了 6 个对照小区和处理小区。处理地块每月人工采收 5 厘米以上的芒柄雉个体,而对照地块则保持原样。我们监测了芒柄草的覆盖率、产量、植株长度和新植株密度,以及底栖植物群和动物群。采伐只影响了荻属植物的叶柄长度,与夏季未采伐的地块相比,荻属植物的叶柄长度减少了 41%,这可能会产生长期影响(如生殖产量)。据观察,荻草的覆盖率和产量具有很强的季节性,在春季和夏季达到高峰。结果表明,在频繁收割的情况下,箭毒草的机会主义生活策略具有很强的恢复能力,但为了使其完全恢复,我们建议恢复期应超过测试的 4 周。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Harvesting impact on a commercially important red macroalga on a North-East Atlantic rocky shore

Red macroalgae in the genus Porphyra are widely collected for human consumption and increasingly harvested along the North Atlantic coasts but their ability to withstand repeated harvesting and maintain high cover and abundance on natural shorelines remains poorly explored, raising sustainability concerns. Therefore, we investigated the effect of frequent hand-harvesting on Porphyra dioica in a population in South Wales, UK, where it is commercially harvested. Twelve control and twelve treatment quadrats were installed in spring and six control and treatment plots in autumn. Monthly hand-harvesting of P. dioica individuals larger than 5 cm was performed in the treatment plots, while the control plots remained undisturbed. We monitored P. dioica percentage cover, yield, thallus length and recruit density, as well as benthic flora and fauna. Harvesting only impacted P. dioica thallus length, resulting in 41% smaller thalli compared to unharvested plots during summer, with possible long-term implications (e.g. reproductive output). Strong seasonality of P. dioica cover and yield was observed, peaking during spring and summer. The results suggest high resilience of the opportunistic life strategy of P. dioica under frequent harvesting, but to allow for full recovery, we urge for a recovery period of more than the tested 4 weeks.

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来源期刊
ACS Applied Bio Materials
ACS Applied Bio Materials Chemistry-Chemistry (all)
CiteScore
9.40
自引率
2.10%
发文量
464
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