The intensity of kelp harvesting shapes the population structure of the foundation species Lessonia trabeculata along the Chilean coastline
The intensity of kelp harvesting shapes the population structure of the foundation species Lessonia trabeculata along the Chilean coastline
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DOI：
10.1007/s00227-021-03870-7
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发表时间：
2021-04
期刊：
影响因子：
2.4
通讯作者：
A. Gouraguine;P. Moore;M. Burrows;E. Velasco;Luis Ariz;Luis Figueroa-Fabrega;Rodrigo H Muñoz-Cordovez;Ítalo Fernández-Cisternas;D. Smale;A. Pérez‐Matus
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文献类型：
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作者：
A. Gouraguine;P. Moore;M. Burrows;E. Velasco;Luis Ariz;Luis Figueroa-Fabrega;Rodrigo H Muñoz-Cordovez;Ítalo Fernández-Cisternas;D. Smale;A. Pérez‐Matus
海带是支持高水平生物多样性的基础物种，并直接或间接地为人类社会提供广泛的生态产品和服务。近几十年来，由于对海带衍生产品如海藻酸盐的高需求，商业野生捕捞增加，导致一些地区海带生物量下降。智利占全球海带产量的40%，潮下带海带Lessonia trabeculatabe是主要目标物种之一。然而，目前缺乏资料，说明不同程度的采伐强度，由不同的管理制度及其执法影响。小梁种群在这里，我们研究了不同的管理制度，其特点是不同层次的开发海带和海带相关的动物，有onL。沿着沿着~1600 km的智利海岸线的骨小梁密度和形态。研究结果表明，收获强度可能会影响这两个。小梁密度和形态。幼虫密度。在受捕捞影响最严重的地区，小梁的数量是5倍，而海带的形态值，包括固着直径、柄数和总长度，在捕捞强度较低的地区总是较高。本研究表明，不同的保护程度会影响到潮下带的密度和形态。这对海带森林生态系统的养护和这一重要渔业的管理具有重要意义。
Kelp are foundation species that support high levels of biodiversity and, either directly or indirectly provide a wide range of ecological goods and services to human society. In recent decades, due to the high demand for kelp-derived products such as alginate, commercial wild harvesting has increased, leading to declines of kelp biomass in some regions. Chile accounts for 40% of the global kelp harvest, with the subtidal kelp,Lessonia trabeculatabeing one of the main target species. Currently, however, there is a lack of information on how different degrees of harvesting intensity, governed by distinct management regimes and their enforcement influencesL. trabeculatapopulations. Here we examined the effect different management regimes, characterised by distinct levels of exploitation of kelp and kelp-associated fauna, have onL. trabeculatadensity and morphology along ~ 1600 km of the Chilean coastline. The findings demonstrated that harvesting intensity likely influences bothL. trabeculatadensity and morphology. Juvenile density ofL. trabeculatawas five times higher in the most harvesting-affected areas, while kelp morphology values, including holdfast diameter, number of stipes and total length, were always higher in the less-intensively harvested areas. Our study suggests that different degrees of protection can influence density and morphology of subtidalL. trabeculatapopulations, which in turn has important implications for the conservation of the kelp forest ecosystems and management of this important fishery.