• 한국수산과학회지
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• 제51권4호
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• pp.426-434
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• 2018

We investigated temporal and depth-related variation in species composition and abundance of the fish assemblage in the southern East Sea. Fish samples were collected seasonally between 2007 and 2008 using a demersal trawl off the southern coast of Korea. We identified 59 fish species belonging to 41 families. The most frequently occurring species was Coelorinchus multispinulosus, followed by Lophius litulon, Acropoma japonicum and Apogon lineatus. The five most abundant species were A. lineatus, A. japonicum, Myctophum nitidulum, Engraulis japonicus and C. multispinulosus, accounting for 87.04% of the total number of individuals collected. The number of species, abundance and diversity fluctuated with sampling location and time. Permutational multivariate analyses of variance revealed that the assemblage structure was influenced by year, season and water depth, with season being the main indicator. These changes were visually emphasized using non-metric multidimensional scaling ordination plots. Fluctuations in assemblage structure were due to differential contributions of the dominant species.

• Animal Systematics, Evolution and Diversity
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• 제26권2호
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• pp.105-114
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• 2010

A study of Han River fish assemblage dynamics for 4 years was conducted. From April 2005 to August, 2008, fishes inhabiting two sites of Han River were sampled for identification. For further analysis, 40 individuals of the dominant species were sampled monthly from March 2006 to November 2008. The fish assemblage at site 1 was dominated by Zacco platypus (32.69%), while the subdominant species were Acheilognathus yamatsutae (14.4%), Acanthorhodeus gracilis (9.43%), Squalidus japonicus coreanus (6.84%), and Tridentiger brevispinis (5.18%). The most abundant species at site 2 was Korean Chub (Zacco koreanus) with relative abundance of 62.45% and followed by Pungtungia herzi (10.29%), Coreoperca herzi (8.67%), and Coreoleuciscus splendidus (6.82%) as the subdominant species. At both sites, the endemics populations show an increasing pattern during the whole survey period, while the natives were declining in the last two years.

• 한국해양학회지
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• 제27권1호
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• pp.46-54
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• 1992

1991년 4계절 동안 영일만의 다모류 군집에 관한 조사를 실시하였다. 다모류는 전 체 저서동물 개체수의 71.3%를 차지하는 가장 우점하는 동물군으로 총 72종이 채집되 었고 평균서식밀도는 1,485 indiv.m/SUP -2/이었다. 종수와 개체수는 여름에 54종, 3,2.7 indiv. m/SUP -2/ 으로 가장 높았고, 가을에 35종, 755 indiv. m/SUP -2/으로 가장 낮았다. 우점종은 Spiophanes nombyx (37.5%), followed by Pseudopolydora sp.(8.4%), Lumbrineris longifolia(7.0%), Madden cristata(6.5%), Polydora ciliata(4.9%)등이다. 겨울에는 Maldane cristata, 봄에는 Polydora ciliata, 그리고 여름과 가을에는 Spiophanes bombyx가 우점하였다. 다모류는 영일만의 남동쪽 해역에 서 풍부하였고 형산강 입구에서 빈약하였다. 종조성에 기초한 집괴분석 결과 영밀만은 3개의 지역으로 구분되었다. 각 지역에는 특정적인 동물 군집이 형성되었다. 즉, 영 일만의 중심부에서 남동쪽 해역까지는 Maldane-Praxillella 군집, 북서쪽 해역은 Spiophanes-Nephtys 군집, 그리고 형산강 입구에서 포항항까지는 Pseudopolydora-Polydora-Capitella 군집이 형성되었다. Maldane-Praxillella 군집은 55종으로 출현종수가 가장 많으며, 종다양성지수와 종풍부도지수 역이 가장 높았다. Pseudopolydora-Polydora-Capitella 군집은 서식밀도가 가장 높았다. Pseudopolydora-Polydora-Capitella 군집은 유기물오염 지시종이 우점하는 특징적인 군집이다. 우점종은 Pseudopolydora sp., Polydora ciliata, Capitella capitata, Dorvillea sp. 등이다.

• 한국제4기학회지
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• 제31권2호
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• pp.1-12
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• 2017

김제시 부량면 용성리 일대 유적 발굴 지역의 트렌치 단면으로부터 총 23개의 시료를 채취하여 규조를 분석하였다. 총 32속 61종의 규조를 감정하였으며, 종 다양성과 개체 수는 매우 적었다. 각 층준의 군집 조성과 규조 절대 개체 수 및 환경지시종의 분포에 의해서 3개의 군집대를 설정하였다. 규조분대 I에서는 해수종이 주로 산출되었으며, 인접한 지역에서는 해수종의 산출이 보고되지 않았기 때문에 이는 해수유입에 대한 귀중한 자료가 된다. 규조분대 II에서는 기수종과 담수종의 산출이 풍부하여 담수의 유입으로 인한 기수 환경이었음을 알려준다. 규조분대 III에서는 담수종의 산출이 많고, 그 중 Eunotia속에 포함되는 종들이 주로 산출되는 것으로 보아 담수의 유입이 있는 습윤한 토양 환경에서 퇴적되었다.

• Journal of Ecology and Environment
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• 제42권4호
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• pp.265-271
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• 2018

Background: Temperature-driven variation in pollinator assemblage and activity are important information, especially at high altitudes, where rising temperature trends exceed global levels. Temporal patterns of pollinators in a flowering season can be used as a proxy to predict the changes of high-altitude plants' mutualistic relationships. We observed a spring temperature change in one population of a high-altitude endemic species, Megaleranthis saniculifolia on Mt. Sobaeksan, and related it to pollinator assemblage and activity changes. Methods: This study was conducted at two sites, each facing different slopes (NE and NW), for two times in the spring of 2013 (early-flowering, April 27-28, vs. mid-flowering, May 7-8, 2013). We confirmed that the two sites were comparable in snowmelt regime, composition of flowering plants, and flower density, which could affect pollinator assemblage and activity. Pollinator assemblage and activity were investigated at three quadrats ($1m^2$ with 5-m distance) for each site, covering a total of 840 min observation for each site. We analyzed correlations between the temperature and visitation frequency. Results: Twelve pollinator species belonging to four orders were observed for M. saniculifolia at both sites during early- and mid-flowering times. Diptera (five species) and hymenopteran species (four species) were the most abundant pollinators. Pollinator richness increased at both sites toward the mid-flowering time [early vs. mid = 7 (NE) and 3 (NW) vs. 9 (NE) and 5 (NW)]. Compared to the early-flowering time, visitation frequency showed a fourfold increase in the mid-flowering time. With the progression of spring, major pollinators changed from flies to bees. Upon using data pooled over both sites and flowering times, hourly visitation frequency was strongly positively correlated with hourly mean air temperature. Conclusions: The spring temperature change over a relatively brief flowering period of M. saniculifolia at high altitudes can alter pollinator assemblages through pollinator dominance and visitation frequency changes. Thus, this study emphasizes information on intra- and inter-annual variations in the mutualistic relationship between pollinators and M. saniculifolia to further assess the warming impacts on M. saniculifolia's reproductive fitness.

• 한국수산과학회지
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• 제35권4호
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• pp.366-379
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• 2002

가덕도 주변 해역에 서식하는 어류의 종조성과 계절 변동을 파악하기 위해 1998년 1월부터 12월까지 삼각망을 이용하여 어류를 매월 소조기에 채집하였다. 조사 기간 동안 채집된 어류는 69과 136종이었다. 전갱이 (Trachums japonicus), 전어 (Konosirus pu-nctatus), 숭어 (Mugil cephalus)가 우점하였는데, 이들 어종이 전체 채집 개체수와 생체량의 $63.7\%$와 $83.1\%$를 차지하였다 그밖에도 주둥치 (Leiognathus nuchalis), 복섬 (Takifugu niphobles), 고등어 (Scomber japonicus), 갈치 ( Trichiurus leptrus), 등줄숭어 (Chelon afnnis), 열동가리돔 (Apogon lineatus), 수조기 (NibeaalbiHora), 감성돔 (Acanthopagrus schlegeli) 등이 비교적 많이 채집되었다 채집 종수는 여름에 많았고 겨울에 적었다. 채집량은 봄에 높은 값을 보였으며, 겨울에 낮은 값을 보였다. 종다양도지수는 다른 계절에 비해 봄에 낮은 값을 보였다.

• 한국수산과학회지
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• 제43권6호
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• pp.693-704
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• 2010

Seasonal variation in species composition around Dokdo, East Sea of Korea, was investigated using trammel-net catches, from 2006 to 2009. A total of 53 fish species belonging to 23 families in 12 orders were captured; the orders Perciformes (12 families, 22 species) and Scorpaeniformes (four families, 22 species) were dominant. Between 2008 and 2009, 43 species were collected by trammel net. The number of species was highest in August 2009 (25 species) and lowest in February 2009 (11 species). The number of individuals and total biomass peaked in November 2009. Diversity indices for fish catches were highest in August 2008 (2.4368) and lowest in November 2009 (0.4253). The dominant species were Thamnaconus modestus and Sebastes schlegeli. Hierarchical clustering analysis showed five fish groups, with frequency and number of individuals similar to results of correspondence analysis (CA), which showed a closer relationship to the year term than the season term. CA showed that temperature was an important factor influencing fish species richness and abundance. Three main fish assemblage types coexisted around Dokdo: an East Sea coastal fish assemblage, a subtropical fish assemblage, and a cold water fish assemblage.

• Animal Systematics, Evolution and Diversity
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• 제29권2호
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• pp.99-114
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• 2013

Phylogeographic and feeding ecological studies of seven terrestrial mustelid species (Carnivora, Mustelidae), the Japanese marten Martes melampus, the sable Martes zibellina, the Japanese badger Meles anakuma, the ermine or the stoat Mustela erminea, the Japanese weasel Mustela itatsi, the least weasel Mustela nivalis, and the Siberian weasel Mustela sibirica, representing four biogeographic patterns in the Japanese archipelagos (Hokkaido, Honshu-Shikoku-Kyushu, Tsushima, and Hokkaido-Honshu), were reviewed in order to clarify causes for the faunal assemblage processes of those mustelid species in Japan. Here, three main constraints were extracted as important factors on the mustelid assemblage. First, fundamental evolutionary differences maintained by niche conservatism in each ecologically diversified lineage ("evolutionary constraint") would enable the species to co-occur without any major problem (coexistence among Martes, Meles, and Mustela species). Second, "ecological constraints" would force two closely related species to be allopatric by competitive exclusion (Mu. itatsi and Mu. sibirica) or to be sympatric by resource partitions (Mu. erminea and Mu. nivalis). Third and most importantly, "geological constraints" would allow specific species to be embraced by a particular geographic region, primarily deciding which species co-occurs. The allopatric distribution of two Martes species in Japan would have been established by the strong effect of the geological separation in Tsugaru Strait. Elucidating both phylogeny and ecology of co-existing species in a community assemblage is important to know which species possess distinct lineage and which ecological traits are adapted to local environments, fulfilling the requirement of the field of conservation biology that endemism and adaptation should both be considered. The Japanese archipelagos would, therefore, provide valuable insight into the conservation for small carnivoran species.

• 한국수산과학회지
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• 제33권4호
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• pp.288-301
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• 2000

가덕도 주변 해역에 서식하는 어류의 종조성과 계절 변동을 알아보기 위해 1998년 1월부터 12월까지 소형 기선저인망을 이용하여 어류를 매월 채집하였다. 조사 기간 동안 채집된 어류는 57과 110종이었다 실양태 (Repomucenus valenciennei), 청멸 (Thryssa kammalensis), 주둥치 (Leiognathug nuchalis), 등가시치 (Zoarces gilli)가 연중 우점하였는데, 이들 어종이 전체 채집 개체수와 생체량의 $57.6{\%}$와 $37.2{\%}를$ 차지하였다. 그 밖에도 청보리멸 (Sillagojaponica), 열동가리돔 (Apogon lineatus), 횐베도라치 (Pholis fangi), 멸치 (Engraulis japonicus), 풀반댕이 (nvssa adeire), 베도라치 (Pholis nebulosa), 붕장어 (Congo.my.iaste.), 꼼치 (Liparis tnnakai), 줄망둑 (Acentrogobius pnaunlii), 문치가자미 (Limanda yokohamae), 도화망둑 (Chaeturichthys hexanema), 풀미역치 (Erisphex pottii), 용서대 (Cynoglossus abbreviatus) 등이 비교적 많이 채집되었다. 채집 종수 및 채집량의 계절 변동을 보면, 봄과 가을에 높은 값을 보였으며 여름과 겨울에 낮은 값을 보였다. 종다양도지수는 가을에 높은 값을 보였다.

• 수산해양기술연구
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• 제46권4호
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• pp.335-345
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• 2010

Species composition and seasonal variation of fish assemblage in Sacheon marine ranching, Korea were examined. Sampling was seasonally made by a shrimp trawl from February 2009 to November 2009. A total of 55 species were collected. Of these, five species was dominant species comprising 51.1% of the total number of individuals. Nine species represented 57.3% of the total biomass. While total abundance (number of individuals) was high in spring, total biomass and species richness (number of species) and diversity were high in autumn. Cluster analysis, based on seasonally abundance data of the 21 most common species, showed that the species were separated into 4 different groups. Group A composed of Pholis nebulosa, Pleuronectes yokohamae, Hypodytes rubripinnis, Hexagrammos otakii, Tridentiger trigonocephalus and Paracercis sexfasciata, which were year round residents, group B Congr myriaster, Leiognathus nuchalis, and Platycephalus indicus, which were abundant in autumn, group C Sillago japonica, Pseudaesopia japonica, Zoarces gilli, Pholis fangi, and Pleuronichthys cornutus which were abundant in spring, and group D Sillago sihama, Cociella sp., Johnius grypotus, Cynoglossus joyneri, Cynoglossus robustus, and Pennahia argentata, which were abundant in summer. Principal component analysis revealed that seasonal variation in the fish assemblage was attributed to the abundance of temporal species such as conger and sand smelt fishes, which were abundant in summer, due to seasonal variation of water temperature.