Growth and Maturation of Laminaria japonica Transplanted for Seaforest Construction on Barren Ground

Kim, Young-Dae; Hong, Jong Chul; Song, Hong-In; Jeon, Chang-Yeong; Kim, Su Kyoung; Son, Yong-Soo; Han, H.-Y.; Kim, Dong-Sam; Kim, Jinhee; Kim, Myoung-Rae; Gong, Yong-Gun; Kim, Dae-Kweon

doi:10.5657/kfas.2007.40.5.323

Cited by 6 publications

(5 citation statements)

References 7 publications

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“…Seaweed deforested areas have become barren grounds covered by crustose coralline algae. These barrens have continuously extended along most Korean coasts (Kim et al 2007). The Korea Fisheries Resources Agency (FIRA) has recently developed tools to estimate rock surface areas and barren ground areas using a hyper-spectral imaging method.…”

Section: Restoration Of Deforested Areasmentioning

confidence: 99%

Seaweed resources of Korea

2020

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AbstractKorea has a long history of utilizing seaweeds, as the country has a high biodiversity of seaweeds. The abundance and composition of seaweed species have changed over the past decades due to climate change and anthropogenic influences. Some species showed a significant extension of their distribution range to the north while some species declined. Some areas have even become barren ground. Korea has put extensive effort into restoring the seaweed resources in these deforested areas. Korea is one of the most advanced countries in the World in terms of seaweed aquaculture. However, the aquacultured species are mostly limited to three genera, Saccharina, Undaria and Pyropia/Porphyra, which represent 96% of the entire seaweed production in the country. Korea has developed highly advanced cultivation technologies as well as various cultivars using breeding and hybridization technologies for these species. There has also been considerable effort in developing environmentally sustainable aquaculture systems using seaweed cultivation (e. g. integrated multi-trophic aquaculture, nutrient bioextraction and biofloc). This study discusses the current status and challenges of the above mentioned topics in detail. In addition, the present study encourages South and North Korean scientists to collaborate in the study of seaweed resources at the border of these two countries.

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Section: Restoration Of Deforested Areasmentioning

confidence: 99%

Seaweed resources of Korea

2020

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“…녹음 현상이 확산되기 시작하여 년대 이후 , 1990 에는 동해 연안에서도 그 피해가 심화되어 가고 있는 실정이다 (MOMAF, 2002a, b;Kim, 2006;Kim et al, 2006Kim et al, , 2007Kim, 2011;East Sea Fisheries Research Institute, NFRDI, 2007, 2009 이에 따라 환경보전의 견지에 2010; Han, 2012).…”

Section: 제주도와 남해안 일대에서는 년대부터 갯 1980unclassified

Changes in Marine Algal Flora settled on the Artificial Seaweed Reefs Before and After Rocky Cleaning and the Early Succession of the Seaweeds attached to the Test Panels

Gim¹,

Kwak²,

Chung

et al. 2013

Journal of Fisheries and Marine Sciences Education

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The marine algal flora assemblages settled on the artificial seaweed reefs in Jeju-do before and after rocky cleaning were investigated during summer and the early succession of seaweeds attached to the test panels on the structures of the artificial reef after rocky cleaning were observed by visual observations and under the dissecting microscope in order to evaluate the effects of this rocky cleaning operation. Species composition and algal biomass on the Bboolsamgak-typed seaweed artificial reefs before and after rocky cleaning were measured and compared before and after rocky cleaning. Before rocky cleaning in July 2012, only nine algal species had existed on the Bboolsamgak-typed seaweed artificial reefs, however, twenty algal species occurred on the seaweed artificial reefs after rocky cleaning in July 2013. Particularly, 15 species among them in July 2013 were not found in July 2012 and they seemed to occur newly on the artificial reefs. A large quantity of algal biomass increased in July 2013 after rocky cleaning. Based on the importance value, there was a drastic change in the dominant species between July 2012 and July 2013 after rocky cleaning. By dissecting micrographs, an epiphytic diatom, Licmophora sp. and flagellates, were observed on the 9th day. A chlorophyte, Ulothrix flacca was observed after 14 days, Ulva pertusa, Bryopsis pulmosa, crustose coralline algae, and Cladophora spp. were after one month. After two months, a significant species succession was observed from three previous chlorophyte species to crustose coralline algae existed as a dominant species on the panels. In this study, however, any brown algae were not found until three months in the early seaweed succession. All above results indicates that the rocky cleaning is a very efficient method for the establishment of macroalgal assemblages on the artificial reefs.

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“…The communities commonly carried out the programs by seeding meiospores of Saccharina japonica on seed strings called "cremonasa," winding the strings with seaweed growing on them around a cloth braided rope (15-20 mm in diameter) and then tying the cloth rope onto an artificial seaweed reef. However, the cloth ropes were easily broken by strong tides and waves, preventing Saccharina from taking root, and they mostly failed to grow or survive (Kim et al 2007). During the past few decades, researchers in Korea and Japan have developed transplantation techniques to create marine forests (Choi et al 2002, Kim et al 2007.…”

Section: Methodsmentioning

confidence: 99%

“…However, the cloth ropes were easily broken by strong tides and waves, preventing Saccharina from taking root, and they mostly failed to grow or survive (Kim et al 2007). During the past few decades, researchers in Korea and Japan have developed transplantation techniques to create marine forests (Choi et al 2002, Kim et al 2007. Serisawa et al (2002Serisawa et al ( , 2003 developed a technique for Ecklonia cava in which it was transplanted onto small concrete tiles (10 cm length × 10 cm width × 0.4 cm height).…”

Section: Methodsmentioning

confidence: 99%

“…The situations could lead to a decline in the fisheries of the country (Kim et al 2006(Kim et al , 2007(Kim et al , 2010. It has been observed that both the diversity and biomass of seaweed species are declining in the coastal waters of Korea due to increasing occurrences in whitening event, changes in the oceanic conditions and increased number of grazers.…”

Section: Introductionmentioning

confidence: 99%

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Size determination of Ecklonia cava for successful transplantation onto artificial seaweed reef

Shim¹,

Park²,

Hong³

et al. 2013

ALGAE

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The objective of this study was to determine the optimal blade size and timing to transplant seed-stock of Ecklonia cava Kjellman onto the reef structure. We used the modified artificial stepped reef structure. A total of 14 units (3.0 m length × 3.5 m width × 1.1 m height) were deployed 7-8 m deep under the water to examine the optimal blade size and timing to transplant seed-stock of E. cava onto the structures. Sporophytes of E. cava <1 cm in length were all died within 1 month of transplantation. The blades of 5-10 cm in length which were transplanted in March 2007 survived and grew well on the artificial reefs. Growth rates of 5-10 cm size class were higher than those of longer blade sporophytes (20-30 cm size class, transplanted in April) while the survival rates showed no difference between the classes of blade size. Both classes of 5-10 and 20-30 cm in length grew until July, and a reduction in size had occurred in September. These results indicate the importance of the blade size of E. cava and timing for successful transplantation of the seaweed on artificial reef structures.Key Words: artificial reef; barren grounds; Ecklonia cava; seed-stock; transplantation INTRODUCTIONBarren grounds are currently being expanded by destruction of seaweed habitats due to over harvesting, increases in herbivory (e.g., sea urchin and abalone) and sea temperature, and industrial pollution (Serisawa and Ohno 1995, Serisawa et al. 2002, 2003. The situations could lead to a decline in the fisheries of the country (Kim et al. 2006(Kim et al. , 2007(Kim et al. , 2010. It has been observed that both the diversity and biomass of seaweed species are declining in the coastal waters of Korea due to increasing occurrences in whitening event, changes in the oceanic conditions and increased number of grazers. Impacts of the expanded barren fields are particularly serious in waters off Jeju Island and the south and east coasts of the Korean peninsula (Choi et al. 2009, Kang 2010, Kim et al. 2012 -61-280-4750, Fax: +82-61-285-1949 This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. . These transplants successfully grew on the artificial reefs and even produced sporelings on the reef and adjacent rocky substrata. However, these artificial reefs (3.0 m length × 3.5 m width × 1.1 m height and a weight of 4.6 tons) (Kim et al. 2012) were affected by grazing invertebrates, such as sea urchins (Strongylocentrotus nudus, S. intermedius, Hemicentrotus pulcherrimus), and mollusks (Chlorostoma turbinate, Haliotis gigantea). In the present study, modified artificial reefs were developed to overcome this grazing issue. The objective of this study was to determine the optimal plant size and timing for transplantation of E. cava seed-stock using the modified artificial stepped reef structure. MA...

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Growth and Maturation of Laminaria japonica Transplanted for Seaforest Construction on Barren Ground

Cited by 6 publications

References 7 publications

Seaweed resources of Korea

Seaweed resources of Korea

Changes in Marine Algal Flora settled on the Artificial Seaweed Reefs Before and After Rocky Cleaning and the Early Succession of the Seaweeds attached to the Test Panels

Size determination of Ecklonia cava for successful transplantation onto artificial seaweed reef

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