본 연구는 2013년 고성군 화당리에 있는 7개 지점에 대한 식물 플랑크톤의 공간적 분포, 계절적 분포, 표층과 심층의 깊이에 따른 빈도에 대해 기술한 것이다. 화당리에서 식물 플랑크톤 군집은 3강 60분류군으로 다양하였다. 규조강(Bacillariophyceae)은 41분류군으로 가장 높은 다양성을 나타내었으며 그 다음으로는 와편모강(Dinophyceae)으로 16분류군이었고, 황금색조식물강(Cryptophyceae)이 2분류군, 유글레나식물강(Eugenophyceae)이 1분류 군이었다. 표층은 비교적 높은 밀도와 풍부도를 유지하고 있었다. 그런데 Shannon-Weaver의 다양도 지수는 1월을 제외하고는 표층보다 저층에서 더 높았다. 또 균등도 지수도 1월을 제외하고는 표층보다 저층에서 더 높았다. 전체 군집에 대해 ${\beta}$-다양도는 낮거나(7개 정점의 공간적 표층은 1.125, 저층은 1.481) 보통(7개 정점의 시간적 표층은 1.725, 저층은 1.347)이었다. 계절에 따라서는 식물 플랑크톤의 군집 간에 분류학적 동질성이 있었다. 깊이에 대해서도 역시 동질성을 나타내었다. 그러나 풍부도의 분포와 생체량은 동-서 방향 구배가 유의한 차이를 나타내었다.
본 연구는 2013년 고성군 화당리에 있는 7개 지점에 대한 식물 플랑크톤의 공간적 분포, 계절적 분포, 표층과 심층의 깊이에 따른 빈도에 대해 기술한 것이다. 화당리에서 식물 플랑크톤 군집은 3강 60분류군으로 다양하였다. 규조강(Bacillariophyceae)은 41분류군으로 가장 높은 다양성을 나타내었으며 그 다음으로는 와편모강(Dinophyceae)으로 16분류군이었고, 황금색조식물강(Cryptophyceae)이 2분류군, 유글레나식물강(Eugenophyceae)이 1분류 군이었다. 표층은 비교적 높은 밀도와 풍부도를 유지하고 있었다. 그런데 Shannon-Weaver의 다양도 지수는 1월을 제외하고는 표층보다 저층에서 더 높았다. 또 균등도 지수도 1월을 제외하고는 표층보다 저층에서 더 높았다. 전체 군집에 대해 ${\beta}$-다양도는 낮거나(7개 정점의 공간적 표층은 1.125, 저층은 1.481) 보통(7개 정점의 시간적 표층은 1.725, 저층은 1.347)이었다. 계절에 따라서는 식물 플랑크톤의 군집 간에 분류학적 동질성이 있었다. 깊이에 대해서도 역시 동질성을 나타내었다. 그러나 풍부도의 분포와 생체량은 동-서 방향 구배가 유의한 차이를 나타내었다.
This study describe seasonal patterns in the variation of phytoplankton frequency in the water surface and basal layers and their spatial distributions at seven stations in Hwadang-ri, Goseng-gun in 2013. The phytoplankton community at Hwadang-ri was very diverse, with 60 taxa identified, representi...
This study describe seasonal patterns in the variation of phytoplankton frequency in the water surface and basal layers and their spatial distributions at seven stations in Hwadang-ri, Goseng-gun in 2013. The phytoplankton community at Hwadang-ri was very diverse, with 60 taxa identified, representing three classes. Diatoms (Bacillariophyceae) exhibited the greatest diversity, with 41 taxa identified. These were followed by the dinoflagellates Dinophyceae, Cryptophyceae, and Eugenophyceae, with 16 taxa, two taxa, and one taxon, respectively. Water surfaces were shown with the relative individual density or abundance across areas. Except in January, Shannon-Weaver indices of diversity of the water surface layer were lower than those of the basal layer. In addition, evenness indices of the basal layer were higher than those of the water surface layer, except in January. For the community as a whole, the values of ${\beta}$-diversity were low for the seven stations: 1.125 for the water surface layer and 1.481 for the basal layer. Seasonal values for ${\beta}$-diversity were similar at the seven stations: 1.725 for the water surface layer and 1.347 for the basal layer. The phytoplankton community showed high taxonomic homogeneity in all four seasons, in addition to similar trends in seasonal development at depths in the same stations. However, the size distribution of the abundance and biomass showed a statistically significant west-east difference.
This study describe seasonal patterns in the variation of phytoplankton frequency in the water surface and basal layers and their spatial distributions at seven stations in Hwadang-ri, Goseng-gun in 2013. The phytoplankton community at Hwadang-ri was very diverse, with 60 taxa identified, representing three classes. Diatoms (Bacillariophyceae) exhibited the greatest diversity, with 41 taxa identified. These were followed by the dinoflagellates Dinophyceae, Cryptophyceae, and Eugenophyceae, with 16 taxa, two taxa, and one taxon, respectively. Water surfaces were shown with the relative individual density or abundance across areas. Except in January, Shannon-Weaver indices of diversity of the water surface layer were lower than those of the basal layer. In addition, evenness indices of the basal layer were higher than those of the water surface layer, except in January. For the community as a whole, the values of ${\beta}$-diversity were low for the seven stations: 1.125 for the water surface layer and 1.481 for the basal layer. Seasonal values for ${\beta}$-diversity were similar at the seven stations: 1.725 for the water surface layer and 1.347 for the basal layer. The phytoplankton community showed high taxonomic homogeneity in all four seasons, in addition to similar trends in seasonal development at depths in the same stations. However, the size distribution of the abundance and biomass showed a statistically significant west-east difference.
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제안 방법
Therefore, the present study aimed to examine the taxonomic structure of phytoplankton to provide preliminary information at Hwadang-ri which was characterized by tidal regimes ensuring high openness and low water turnover times at high tides. We describe more in details taxonomic composition of diatoms about spatial and temporal variability of phytoplankton.
대상 데이터
Plankton samplings were conducted at seven stations at Hwadang-ri, Georyu-meon, Goseng-gun, Gyeongsangnamdo (Fig. 1). Sampling periods were from 28 January, 14 April, 03 August, and 27 October 2013.
데이터처리
). The correlation coefficient is calculated for estimates of the relationships between geographic distance and the phytoplankton community. Except where stated otherwise, statistical analyses were performed using the SPSS software (Release 21.
이론/모형
Analysis of seasonal variability within the phytoplankton community was performed using the hierarchical clustering using the Jaccard Index of similarity. In the beginning of the year (January), all stations were often more than 60% of similarity, as shown in Fig.
Evenness indices (E1~E5) were calculated using important value index of species using Hill’s methods [5].
The species richness of phytoplankton was calculated by using the method, Margalef’s index of richness [10].
성능/효과
The phytoplankton community at basal layer on January was also very diverse (Table 2). A total of 53 taxa were identified at surface layer: Bacillariophyceae 36 taxa, Dinophyceae 15 taxa, one Cryptophyceae taxon, and one Eugenophyceae taxon. Diatoms and dinoflagellates were the most diverse groups.
The station C was characterized by high phytoplankton biomass and station G was lowest. Leptocylindrus danicus was the most dominant species at seven stations.
On April 2013, a total of 42 taxa were identified at surface layer: Bacillariophyceae 27 taxa, Dinophyceae 12 taxa, two Cryptophyceae taxa, and one Eugenophyceae taxon. The station B was characterized by high phytoplankton biomass.
On April, a total of 40 taxa were identified at low surface layer: Bacillariophyceae 28 taxa, Dinophyceae 10 taxa, Cryptophyceae and Eugenophyceae, each of one taxon. The station C was characterized by high phytoplankton biomass.
On August, a total of 48 taxa were identified at surface layer: Bacillariophyceae 35 taxa, Dinophyceae 11 taxa, one Cryptophyceae taxon, and one Eugenophyceae taxon. The relative dominant species were seven diatoms taxa (Chaetoceros danicus, Chaetoceros debilis, Chaetoceros didymus, and Skeletonema costatum) at seven stations
On October, a total of 41 taxa were identified at surface layer: Bacillariophyceae 34 taxa, Dinophyceae 5 taxa, and Cryptophyceae 2 taxa. The station B was characterized by high phytoplankton biomass and station G was lowest.
During summer season, Skeletonema costatum was most abundant at all stations. Prorocentrum minimum was the second dominant species at the stations F and G. Chaetoceros danicus was also abundant at all stations.
The station B was characterized by high phytoplankton biomass. The relative dominant species were three diatoms taxa (Chaetoceros danicus, Chaetoceros pseudocrinitus, and Leptocylindrus danicus) at seven stations.
The station A was characterized by high phytoplankton biomass. The relative dominant species were three diatoms taxa (Dactyliosolen fragillisimus, Leptocylindrus danicus, and Skeletonema costatum) and one Dinoflagellate taxon (Prorocentrum minimum) at seven stations.
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