• 환경생물
• /
• 제35권3호
• /
• pp.215-226
• /
• 2017

A study on indigenous diatoms was carried out at 10 sites from May 2014 to December 2016 in marine and freshwater in Korea. Seventeen species of diatoms are new to Korea and they are divided into 3 classes, 4 subclasses, 10 orders, 14 families, and 16 genera. The nomenclatures, references, dimensions, specimens examined, local habitat, distribution in Korea, and photograph are reported here. Seventeen species found in marine, freshwater, and brackish water showed species-specific habitats.

• 환경생물
• /
• 제35권4호
• /
• pp.604-621
• /
• 2017

This research was conducted to find the indigenous diatom species unrecorded in Korea from February to December 2016. The samples were taken at 28 sites of the coastal regions on the west coast of Korea and Jeju Island. Diatoms were collected mostly from sand and mud of tidal flats, including gravel, seaweed on the bottom and macrophytes floating in the seawater. Diatom specimens were observed by means of light and scanning electron microscopy. Twenty one species were discovered and added as new specimens to the Korean diatom flora, which are divided into 9 orders, 12 families, and 16 genera. The list and photographs of the species are included with the description of the morphological characteristics and distribution in Korea.

• Journal of Ecology and Environment
• /
• 제38권4호
• /
• pp.545-562
• /
• 2015

A study on indigenous diatoms was carried out at 71 sites during the period from April 1999 to August 2014 in marine and fresh water in Korea. Forty species of diatoms are new to Korea and they are divided into three classes, six subclasses, 13 orders, 19 families, and 28 genera. The nomenclatures, references, dimensions, specimens examined, local habitat, distribution in Korea, and photograph are reported here. The 40 species found in marine and fresh water showed speciesspecific habitats.

• 한국환경생태학회지
• /
• 제26권3호
• /
• pp.367-373
• /
• 2012

몰개(Squalidus japonicus coreanus)의 개체군 생태의 특성을 연구하기 위해 2011년 1월부터 12월까지 남한강(양평군 양평읍 창대리)에서 조사하였다. 본 종은 하천 하류에 분포하며 하상구조는 주로 모래로 이루어져 있었다. 서식지 수심은 80~120cm이었고 유속은 0.14~0.38m/sec 상태를 유지하고 있었다. 성비는 1 : 0.82 이었고 산란기는 6~7월이며 산란기 수온은 $18.5{\sim}24.3^{\circ}C$이었다. 만 2년생 이상부터 성적 성숙이 이루어지기 시작하였다. 전장이 34~50mm의 집단은 만 1년생, 51~74mm의 집단은 만2년생, 75mm 이상은 만 3년생으로 추정된다. 포란수는 평균 1,871개이었고 먹이생물은 남조류(Cyanophyta), 녹조류(Chlorophyta), 규조류(Bacillariophyta), 윤충류(Rotatoria), 갑각류(Crustaceae), 요각류(Copepoda), 수서곤충(Aquatic insect)에 속하는 하루살이목(Ephemeroptera), 파리목(Diptera), 선충류(Nematoda) 등이었다. 잡식성이었으며 깔다구류(Chironomidae) 유충을 주로 섭식하였다.

• 한국습지학회지
• /
• 제10권2호
• /
• pp.15-22
• /
• 2008

고산습지인 지리산 왕등재습지에서 담수조류의 분포와 역할을 조사하였다. 환경요인(평균)은 수온 $17.6^{\circ}C$, pH 6.3, 전기전도도 $24.6{\mu}S/cm$, 총질소 0.6 mg/L, 총인 0.09 mg/L 그리고 Chl-a는 $11.9{\mu}g/L$였다. 담수조류는 총 159종이 출현하였으며 녹조강 87종, 규조강 56종, 유글레나강 11종 그리고 남조강이 5종이었다. 이 중에서 녹조강의 물먼지말(desmid)이 56종으로 가장 많았고, 우점종은 규조강의 Aulacoseira distans이었다. 왕등재습지의 먹이사슬 분석을 위해 올챙이의 채식물을 분석한 결과 주로 담수조류를 섭식하였으며, 수중 우점조류인Aulacoseira distans가 최대로 존재하였다. 왕등재습지의 수중생태계에서 담수조류는 1차 생산자이자 상위 포식자의 먹이원으로서의 역할을 하는 것으로 판단된다.

• 한국물환경학회지
• /
• 제39권2호
• /
• pp.181-193
• /
• 2023

Distribution changes in microalgae communities were studied in the Nakdonggang River at two sampling stations (St.1 Gyeongcheongyo Bridge (GB) and St.2 Daedong Wharf (DW)) at monthly intervals from January 2021 to November 2021. A total of 83 taxa included 82 species, 1 forma, belonging to 49 genera, 32 families, 21 orders, and 8 classes. The most important groups were Bacillariophyta and Chlorophyta. The number of species ranged from 5 to 24 in GB, and from 9 to 21 taxa in DW. The contribution of Bacillariophyta to the total species richness was the highest during all survey periods, and Chlorophyta yielded the next highest value in the study area. The dominant taxa were Aulacoseira ambigua, A. ambigua f. japonica, and Ulnaria acus in this study. Cluster analysis and non-metric multidimensional scaling (nMDS) analysis based on Bray- Curtis similarity identified 4 major groups, which corresponded to microalgae assemblages and their characteristic species. Correlation was analyzed through the CCA analysis. It was found that there was a correlation between the microalgae and environmental factors. It was revealed that the divided groups were distinguished because of the differences by the survey period. Therefore, seasonal change was judged as a major factor affecting the distribution of microalgae communities.

• Journal of Ecology and Environment
• /
• 제47권3호
• /
• pp.157-167
• /
• 2023

Background: The most hazardous wastewater sources in the northern part of the Middle Nile Delta, Egypt; receiving a massive amount of agricultural, industrial, and sewage drainage are Kitchener drain which is one of the tallest drainage systems, and Burullus Lake which represents the 2nd largest Egyptian coastal lake. Results: The current work is to determine the abundance and frequency of cyanophytes, chlorophytes, and bacillariophytes and the correlation between them and environmental abiotic components. Among sixty nine microalgal species, 19 species are belong Cyanophyta, 26 belong Chlorophyta and 24 belong Bacillariophyta. Genus Scenedesmus (Chlorophyta) was the most abundant in the study area (13 species), followed by Genus Oscillatoria (9 species) and Genus Navicula (7 species). Nostoc muscorum and Chlorella vulgaris were the most common and recorded in all sites (100% of the locations) under study. The application of the two-way indicator species analysis (TWINSPAN) and detrended correspondence analysis revealed agglomerating of 4 groups (communities) at 4th level of classification and reasonable segregation between these groups. Zinc, cadmium and lead were showed the highest levels (0.26±0.03, 0.26±0.06, and 0.17±0.01 ppm, respectively). Conclusions: The correlation analysis between water and community variables indicated a high negative correlation of total algae richness with nickel (r = -0.936, p < 0.01). Cyanophyta and Bacillariophyta were correlated negatively (r = -0.842, p < 0.01). However, Chlorophyta showed a negative richness with each of Ni and Pb (r = -0.965, -0.873, respectively) on one hand and a high positive correlation was revealed (r = 0.964) with all environmental variables on the other hand.

• Journal of Ecology and Environment
• /
• 제37권4호
• /
• pp.257-270
• /
• 2014

In a survey of periphytic and benthic diatoms in Korea, diatoms of genus Stauroneis were found to be widely distributed over freshwaters, rivers and streams, lakes and reservoir, wetlands in lowland and mountain areas, and even subaerial terrestrial habitats. However, it is clear that Stauroneis diatoms prefer peatlands, which can be more or less acidic or oligotrophic environments in freshwaters. In this study, Staurones diatoms were collected mainly from mountain peatlands. Twenty five taxa were confirmed to be species, while some specimens remain unidentified. Approximately twenty species have been reported in Korea in the past, but these are largely S. anceps Ehremberg sensu lato, S. phoenicenteron (Nitzsch) Eherenberg sensu lato, and their infraspecies variety or forma. Sixteen of the twenty five Stauroneis taxa found in this survey are reported for the first time in Korea.

• 환경생물
• /
• 제35권3호
• /
• pp.240-250
• /
• 2017

This taxonomic study sought to detect and describe diatom species not yet recorded in Korea. The study was conducted at three islands located off the western coast of Korea, Wido Island near Buan, Wonsando Island near Boryeong and Dekjeokdo Island near Incheon. Diatoms were collected from the bottom, stone, macrophytes and other substrates in water bodies, which are affected by seawater. Fifteen naviculoid taxa are described. Of these, 13 are novel to Korea. The genus Navicula has nine species; Navicula alineae Lange-Bertalot, N. ammophila Grunow, N. cariocincta Lange-Bertalot, N. elegantoides Hustedt, N. longicephala Hustedt, N. normaloides Cholnoky, N. notha Wallace, N. novaesiberica Lange-Bertalot, N. riediana Lange-Bertalot & U. Rumrich. The genus Craticula has four species; Craticula buderi (Hustedt) Lange-Bertalot, C. halophila (Grunow) D.G. Mann, C. riparia (Hustedt) Lange-Bertalot and C. riparia var. mollenhaueri Lange-Bertalot.

• 환경생물
• /
• 제35권3호
• /
• pp.227-239
• /
• 2017

To find unrecorded diatom species in the Nakdong River Estuary and Yeongil Bay, bottom sediments in the estuary, and seagrasses in the bay were collected from 12 sampling sites. Eighteen species and four genera are added to the national flora of diatom as newly recorded one. In the Nakdong River Estuary, twelve species are new records to Korea, Martyana atomus (Hustedt) Snoeijs, Pseudostaurosira perminuta (Grunow) Sabbe & Vyverman, Trachysphenia acuminata M. Peragallo, Trachysphenia australis Petit, Fallacia clipeiformis ($K{\ddot{o}}nig$) D.G. Mann, Amphora graeffeana Hendey, Amphora jostesorum Witkowski, Metzeltin & Lange-Bertalot, Amphora ostrearia var. vitrea (Cleve) Cleve, Amphora wisei (Salah) Simonsen, Halamphora eunotia (Cleve) Levkov, Halamphora lineata (Gregory) Levkov, Nitzschia littorea Grunow. In Yeongil Bay, four species are added as new, Licmophora gracilis var. anglica ($K{\ddot{u}}tzing$) H. Peragallo & M. Peragallo, Tabularia investiens (W. Smith) Williams & Round, Nitzschia composita Giffen, Nagumoea neritica Witkowski & Kociolek. Two species occurred simultaneously in both regions, Fragilaria cassubica Witkowski & Lange-Bertalot and Hyalinella lateripunctata Witkowski et al.