The influence of seeding method and water depth on the morphology and biomass yield of farmed sugar kelp (Saccharina latissima) at a small-scale cultivation site in the northeast Atlantic.

IF 2.8 3区 生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY
Journal of Applied Phycology Pub Date : 2025-01-01 Epub Date: 2024-12-16 DOI:10.1007/s10811-024-03394-9
Catherine M Wilding, Kathryn E Smith, Carly L Daniels, Jessica Knoop, Dan A Smale
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引用次数: 0

Abstract

Seaweed farming is a rapidly growing global industry, driven by increasing demand for biomass with a range of commercial applications. A major barrier limiting expansion of the industry is the need for cost-effective approaches to production. Established twine seeding methods are reliable, but recently developed binder methods offer potential scalability while minimising hatchery costs. Here, we compared growth of the farmed kelp Saccharina latissima using these two seeding methods. We also examined the influence of water depth on biomass production within a vertical cultivation system. Twine consistently achieved greater S. latissima biomass yield, with mean biomass almost four times higher than from binder seeding, and sporophytes reaching significantly greater density and total length. The biomass, length and density of S. latissima decreased with increasing water depth, a pattern which was more pronounced with twine seeding. We also observed morphological variability, with larger individuals on twine compared with binder treatments at all depths. Natural settlement of the non-target macroalga Sacchoriza polyschides was also recorded, at significantly greater biomass on binder treatments and at greater depths. Further work is needed to examine the predictability and extent of natural settlement of S. polyschides, and its potential as a commercially-viable species. Overall, twine seeding methods out-performed binder at a relatively dynamic, open coast, small-scale cultivation site. Moreover, while vertical cultivation systems can maximise yield relative to the spatial footprint of a seaweed farm, the marked reduction in cultivated biomass with increasing water depth should be considered within the local environmental context.

东北大西洋一个小规模养殖地点,播种方式和水深对养殖糖海带形态和生物量产量的影响
海藻养殖是一个快速增长的全球产业,其驱动因素是对具有一系列商业应用的生物质的需求不断增加。限制该行业扩张的一个主要障碍是需要具有成本效益的生产方法。现有的麻绳播种方法是可靠的,但最近开发的粘合剂方法提供了潜在的可扩展性,同时最大限度地降低了孵化成本。在此,我们比较了两种播种方式对养殖海带Saccharina latisima的生长效果。我们还研究了垂直栽培系统中水深对生物量生产的影响。麻绳持续获得更高的拉底草生物量产量,平均生物量几乎是捆绑剂播种的4倍,孢子体密度和总长度显著增加。随着水深的增加,柽柳的生物量、长度和密度均呈下降趋势,这种趋势在麻绳播种时更为明显。我们还观察到形态变异,在所有深度,与粘合剂处理相比,麻绳处理的个体更大。非目标大型藻类Sacchoriza polyschides的自然沉降也被记录下来,在粘合剂处理下的生物量显著增加,深度也更大。还需要进一步的工作来研究多裂叶蝉自然定居的可预测性和程度,以及它作为一种商业上可行的物种的潜力。总体而言,在一个相对动态,开放的海岸,小规模的种植场地,麻绳播种方法优于粘合剂。此外,虽然垂直栽培系统相对于海藻养殖场的空间足迹可以最大限度地提高产量,但应在当地环境背景下考虑随着水深增加而显著减少的养殖生物量。
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来源期刊
Journal of Applied Phycology
Journal of Applied Phycology 生物-海洋与淡水生物学
CiteScore
6.80
自引率
9.10%
发文量
212
审稿时长
2.8 months
期刊介绍: The Journal of Applied Phycology publishes work on the rapidly expanding subject of the commercial use of algae. The journal accepts submissions on fundamental research, development of techniques and practical applications in such areas as algal and cyanobacterial biotechnology and genetic engineering, tissues culture, culture collections, commercially useful micro-algae and their products, mariculture, algalization and soil fertility, pollution and fouling, monitoring, toxicity tests, toxic compounds, antibiotics and other biologically active compounds. Each issue of the Journal of Applied Phycology also includes a short section for brief notes and general information on new products, patents and company news.
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