• Ocean and Polar Research
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• 제45권3호
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• pp.173-183
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• 2023

The barren ground phenomenon in Korea began to occur and spread in the southern coast region and in Jeju Island in the 1980s, and since the 1990s, the damage has become serious in the east coast region as well. Korea has enacted the fisheries resource management act to manage such barren ground through the installation of sea forests among projects for the creation of fishery resources. Until now, projects related to the identification of the cause of barren ground have focused on the density of crustose coralline algae, sea urchins and seaweed, so the original cause of barren ground has not yet been identified. In order to manage barren ground, it is necessary to identify the cause of barren ground. To identify these causes, it is necessary to comprehensively consider i) studies on spatial characteristics such as rock mass distribution, slope and water depth, ii) studies on ecological and oceanographic characteristics such as water temperature, salinity, El Niño, and typhoons etc, iii) studies on organisms such as crustose coralline algae, macroalgae, and sea urchins, and iv) studies on coastal use such as living and industrial sewage inflow. Next, as with regard to legislative policy proposals , it is necessary to prepare self-management measures by the government, local governments, and fishermen as well as address management problems related to the use of sea forests by fishermen after their creation . In addition, when creating a sea forest, a management model for each resource management plan is required, and evaluation indicators and indexes that can diagnose the cause of barren ground and guidelines for barren ground measures should be developed.

• Fisheries and Aquatic Sciences
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• 제8권4호
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• pp.243-246
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• 2005

The addition of seaweed extracts was found to regulate the viability of cultures of the crustose coralline alga Lithophyllum yessoense. The viability was quantitated using a triphenyltetrazolium chloride assay, and the methanol-soluble extracts from 18 prevalent seaweed species were tested. Extracts from Codium fragile and Enteromorpha linza inhibited viability, and a Hizikia fusiform is extract slightly increased viability. The methanol extract of C. fragile, which had the strongest inhibitory activity, decreased viability to 72 or $52\%$ that of the control following addition of 0.2 or 2 mg/mL of extract to the culture, respectively. The main active compound in the C. fragile was lipid. This information is a preliminary result related to the exploration of seaweed restoration in the algal whitening area.

• 식물병연구
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• 제13권3호
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• pp.223-227
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• 2007

지의류는 곰팡이와 광합성을 하는 조류 또는 남조류의 공생체로서 토양, 바위, 나무 등에 아주 널리 분포하는 진핵생명체다. 지의류형성곰팡이는 흔히 죽은 나무나 죽어가는 나무 위에서 부착하여 증식하지만 나무를 직접적으로 죽이지는 않는다. 전남 순천시 매실나무 과수원 포장에 있는 매실나무 수피에 엽상체 지의류 Parmotrema autrosinense를 포함한 몇 가지 가상체 지의류가 심하게 증식하고 있었다. 이러한 지의류 조합의 증식으로 매실나무는 회색으로 흉하게 보이고 정상적인 생장이 억제되었으며, 심각하게 영향을 받은 매실나무 가지의 수피에서 지의체를 제거하지 않으면 낙엽이 지고 가지가 말라 죽었다. 매실나무 수피에 있는 지의체를 제거해주면 매실나무 가지들은 수세를 회복하였으며, 지의체를 제거한 후에 $Twin^{(R)}$ 20 또는 톱신페스트를 발라주면 더욱 수세가 왕성해졌다. 따라서 매실나무에 몇 가지 지의류 조합의 정착 및 증식에 의해 발생하는 낙엽과 가지마름 증상을 '매실나무 지의류병(lichen disease)'이라고 명명할 것을 제안한다.

• 생명과학회지
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• 제23권3호
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• pp.341-346
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• 2013

연안 암반지역에서 해조류 군락의 소실 즉 백화 혹은 갯녹음현상은 산호조류와 관련성이 있다. 대표적인 무절산호조의 생물학적 특성을 파악하기 위하여 18S rDNA 유전자를 분석한 결과 혹돌잎(Lithophyllum) 속에 속하는 것을 확인하였고 그 형태적 특성으로 보아 L. yessoense 종인 것으로 유추된다. Triphenyl tetrazolium chloride로서 활력을 측정한 결과 12월에서 2월 사이가 가장 높았으며, 조직 활력을 유지하기 위하여는 $16^{\circ}C$, 16:8 시간 명암 광주기, 30 ${\mu}E/m^2/s$ 광도에서 5일간 최적상태를 보였다. 지방산 조성에서는 EPA가 가장 많은 고도불포화지방산으로서 9.7%를 차지하고 있다. 주사형전자현미경에 의한 표면구조를 보면 평균 3.6 ${\mu}m$ 직경의 둥근 함몰 분화구 모양을 이루며 그 위에 1.0 내지 3.7 ${\mu}m$의 비정형 다각형 구조물들이 덮여져 있다. 이 같은 조성과 구조를 바탕으로 한 생체모방 산호조는 해조류 등에 대한 환경친화적 방오소재로서 활용되어질 수도 있을 것이다.

• Mycobiology
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• 제39권1호
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• pp.61-63
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• 2011

Taxonomic study of the crustose lichen Porpidia was performed in this paper. Three species are described, including two recorded species and one new record: Porpidia macrocarpa (DC.) Hertel & A. J. Schwab. A description of each species is presented along with morphological, anatomic, and chemical characteristics. A key to the identification of species of Porpidia is also presented.

• 한국수산학회:학술대회논문집
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• 한국수산학회 2005년도 춘계학술대회
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• pp.215-216
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• 2005

• Journal of Plant Biology
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• 제38권2호
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• pp.165-171
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• 1995

Plants of G. furcata were divided into four variant populations. The habit characteristics, external and internal morphology were analysed quantitatively in order to clarify their morphological variation. Among four variant populations, type I(typical G. furcata type) and type II(G. furcata f. intricata type) may be influenced by the time when the develop from the crustose basal discs and the tidal level. Type III is the immature plants, and type IV (G. furcata f. coliformis type) is a G. furcata population in late spring after the luxuriant season. For the reason, the formas of G. furcata f. intricata and f. coliformis are no more valid in Gloiopeltis furcata.

• 한국어업기술학회:학술대회논문집
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• 한국어업기술학회 2001년도 추계 수산관련학회 공동학술대회발표요지집
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• pp.345-346
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• 2001

동해안은 최근 몇 년 사이에 갯녹음 현상으로 연안생태계에서 해조류가 쇠퇴하여 어패류의 먹이감소와 서식공간이 줄어드는 연안어장의 황폐화가 진행되고 있다. 갯녹음의 발생원인은 여러 가지 복합적 요인에 의해서 이루어지며, 특히 동해안과 같이 쿠로시오 난류세력의 영향이 미치는 곳에서 무절석 회조류의 번무와 함께 갯녹음역이 확산되는 것으로 알려져 있다 (중략)

• 한국균학회지
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• 제46권4호
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• pp.491-494
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• 2018

A new species of Graphis is described from Cameroon, Africa. The new taxon is distinguished by a greyish-green, glossy, uneven, and continuous thallus. Further, it possesses stellately branched lirellae, and its entire labia are covered almost completely with thick thalline margin. It also has a completely carbonized proper exciple, which is considerably thick at the base, one-spored asci, and muriform hyaline to yellowish ascospores.

• ALGAE
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• 제33권1호
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• pp.85-99
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• 2018

Crustose calcareous algae (CCA) constitute one of the main reef builders on the Abrolhos Bank, Brazil. Once CCA taxonomy is locally understood, differences in growth-forms may be useful for the delimitation of taxa using characteristics such as the presence or absence of surface protuberances. Here, growth-forms were used to identify and quantify the most common CCA taxa on the shallow reefs (3-10 m) of the Abrolhos Bank to determine possible changes in the CCA community over a period of 10 years, and the ecological significance of CCA to local reefs was interpreted. The CCA assemblages were surveyed from 2006-2015 by using fixed photoquadrats at four sites in the inner (10-20 km from the mainland) and mid-shelf reefs (40-75 km from the mainland). The five most common CCA taxa were Pneophyllum conicum, the Lithophyllum kaiserii / Lithophyllum sp. complex, Melyvonnea erubescens, the Hydrolithon boergesenii / Porolithon onkodes complex and Peyssonelia sp. The overall mean CCA cover on the reefs was 20%. A comparison with a previous monitoring study in the same region indicated that the CCA cover nearly doubled from 2003-2008 to 2006-2015. This study reveals that the coral-killing species P. conicum dominated CCA flora on the shallow Abrolhos reefs in the last decade, and the local specific abundance of CCA slightly fluctuated over time and was species- and site-specific. The information obtained in this study contributes to the understanding of the ecology of the key calcifying components of the Abrolhos reefs and provides a useful baseline for exploring the responses of CCA to future environmental changes.