当前位置: X-MOL 学术Estuar. Coasts › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Seaweed Reproduction and Harvest Rebound in Southcentral Alaska: Implications for Wild Stock Management
Estuaries and Coasts ( IF 2.7 ) Pub Date : 2020-05-12 , DOI: 10.1007/s12237-020-00740-1
Brian P. Ulaski , Brenda Konar , Edward O. Otis

In Alaska, interest in harvesting seaweeds for personal use is growing and information on potential impacts of this activity on sustainability of wild populations is lacking. This study provides information on reproductive timing and size, standing crop, and harvest rebound of three commonly harvested seaweeds in Southcentral Alaska: the rockweed, Fucus distichus; the sugar kelp, Saccharina latissima; and the bull kelp, Nereocystis luetkeana. From March through October 2018, seaweeds were surveyed for reproductive status and harvested to determine how much biomass was available. From the harvests, individuals were measured to determine the size when they first become reproductive. Harvested plots were re-harvested to determine biomass regrowth after 2, 4, and 6 months. Fucus and Nereocystis were broadly reproductive over the summer, while Saccharina was not. The presence of reproductive Fucus and Nereocystis throughout the summer could buffer the impacts of late season harvesting. Depending on the species (e.g., Fucus), individuals that became reproductive at a larger size were associated with lower density and lower biomass areas with slower recovery. The amount of biomass available for harvest and the amount that regrew following a harvest were temporally variable but had spatial differences that were consistent throughout the summer. Regrowth following harvesting for all three species was generally low after only 2 months, but the amount of biomass after 6 months post-harvesting was sometimes comparable to non-harvested areas. This study demonstrated that to varying extents, seaweed harvesting may be sustainable if timing of reproduction, available biomass, and regrowth are all considered.



中文翻译:

阿拉斯加中南部的海藻繁殖和收成反弹:对野生种群管理的影响

在阿拉斯加,对收获供个人使用的海藻的兴趣正在增长,并且缺乏有关该活动对野生种群可持续性的潜在影响的信息。这项研究提供生殖时间和规模,现存量,以及在阿拉斯加中南部三种常用收获海藻收获反弹资料:rockweed,墨角藻distichus ; 糖海带,Saccharina latissima;和海带,Nereocystis luetkeana。从2018年3月到2018年10月,对海藻的生殖状况进行了调查并进行了收获,以确定有多少生物量可用。从收获物中,对个体进行测量以确定刚开始繁殖的大小。在2、4和6个月后重新收获收获的地块,以确定生物量的再生长。整个夏天,fucusNereocystis的繁殖能力很强,而Saccharina则没有。整个夏季生殖性神经孢囊菌的存在可以缓冲后期收获的影响。取决于物种(例如,榕属),以较大的尺寸繁殖的个体与较低的密度和较低的生物量区域相关,且恢复较慢。可用于收获的生物量和收获后的再吸收量在时间上是可变的,但在整个夏季具有一致的空间差异。仅在两个月后,这三个物种在收获后的生长通常较低,但是收获后六个月后的生物量有时与未收获地区相当。这项研究表明,如果考虑繁殖时间,可用生物量和再生长,海藻收获在不同程度上可能是可持续的。

更新日期:2020-05-12
down
wechat
bug