Notes on the diatomaceae from Ahmedabad and its environs ? VI. On some diatoms from fountain reservoir of Seth Sarabhai's garden
12
Citation
18
Reference
10
Related Paper
Citation Trend
Keywords:
Navicula
Flora
Fountain
Green algae
Topics:
The diatom assemblages in 2 bored sediment cores in the Yuehu Lake were studied systematically and 83 species and varieties of diatom were found.The sedimental diatom of Z-1 bored had 61 species,and Z-2 had 68 species.The dominant species of Z-1 bored sediment cores were Cyclotella meneghiniana,Aulacoseira granulata,Navicula porifera and Cyclostephanos tholifomis,the dominant species of Z-2 bored sediment cores were Cyclotella meneghiniana,Aulacoseira granulata,Navicula sp.and Cyclostephanos invisitatus.The diatom density in the two cores showed similar trends:the highest density existed in the upper layer,with an average range of 7.14×105-58.65×105 individuals/g,which follwed by the intermediate layer presenting an average range of 0.08×105-13.98×105 individuals/g,and the lowest density was in the bottom layer,with an average range of 0.24×105-0.64×105 individuals/g.Some species,such as Cyclotella meneghiniana、Aulacoseira granulata、Navicula sp.、Navicula porifera、Cyclostephanos tholifomis、Cyclostephanos invisitatus and it's assemblages can be prescription to lake eutrophication.The paper provides a scientific basis for studying the evolution of modern aquatic environment of Yuehu Lake in Wuhan through analyzing effects of environmental factors on the distribution of diatoms.
Navicula
Cite
Citations (0)
ABSTRACT A thallus‐forming diatom, Navicula thallodes Proschkina‐Lavrenko, previously known only from the original collection at Bering Island (U.S.S.R.), has been found at Amchitka Island in the Aleutians, Alaska. The most remarkable observation of the present report is that N. thallodes may form blades up to 50 cm long, which to our knowledge is the greatest length reported for a colonial diatom. SEM observations of this diatom are presented for the first time.
Navicula
Thallus
Nitzschia
Cite
Citations (2)
ABSTRACT Colonies of the tube‐dwelling diatom Navicula hamulifera Grunow living on mangrove prop roots in Indian River. Florida and at La Parguera, Puerto Rico, were studied using light and electron microscopy. Observations of the tube morphology and cell structure of this diatom from fresh samples and cultures are described, as well as the ultrastructural morphology of its frustule. The formation of tubes by this diatom is reported for the first time. Comparisons are made with the closest species ; Navicula delognei V.H. and Navicula pseudocomoides Hendey.
Navicula
Frustule
Morphology
Cite
Citations (8)
ABSTRACT Colonies of the tube‐dwelling diatom Navicula hamulifera Grunow living on mangrove prop roots in Indian River, Florida and at La Parguera, Puerto Rico, were studied using light and electron microscopy. Observations of the tube morphology and cell structure of this diatom from fresh samples and cultures are described, as well as the ultrastructural morphology of its frustule. The formation of tubes by this diatom is reported for the first time. Comparisons are made with the closest species; Navicula delognei V.H. and Navicula pseudoco moides Hendey.
Navicula
Frustule
Morphology
Cite
Citations (1)
The original photographs of five diatom species described in Okuno (1943, 1944) from the Yatuka Deposit were found in the Okuno collection, which was newly donated to TNS. I dis- cuss the taxonomic status of these five taxa using these original photographs. Gomphonema yatukaensis Horik. et Okuno is a synonym of Gomphonema grovei var. lingulatum (Hust.) Lange- Bert., and Navicula yatukaensis belongs to the genus Pinnularia.
Navicula
Synonym (taxonomy)
Cite
Citations (6)
Diatom assemblages from the surface sediments of the Chukchi Sea have been studied. The diatom taxonomic composition, ecological structure and their quantitative content were analyzed. 138 diatom species belonging to 55 genera were identifi ed. Most common genera are Navicula (17 species), Chaetoceros (13 species), Thalassiosira (10 species). The obtained data will be used for future paleogeographical and paleoecological reconstructions.
Navicula
Chaetoceros
Cite
Citations (0)
The diatom test is the most reliable approach that provides scientific support for diagnosis of drowning. However, there are limitations, which, made forensic scientists stop using the test, such as the fact that it is time-consuming and lack of domain knowledge of the diatom identification. This study aims to find different types of diatoms that are commonly present in water bodies in China for a possible application of an automatic forensic diatom test. In total, 119 different water samples were obtained from different locations of the Yellow River, the Yangtze River and the Pearl River (China) and were analysed. About 50 ml of water of each sampling site was digested and then observed by a scanning electron microscopy. The diatom genera found in samples were recorded. Twenty-four diatom genera were found in all samples. Among them, Navicula, Nitzschia, Cyclotella, Synedra and Gomphonema were commonly presented (>70%) across the broad geographic regions. Navicula, Nitzschia, Cyclotella, Synedra and Gomphonema would be the main diatoms used in designing an automatic diatom identification system for forensic diatom test.
Navicula
Nitzschia
Cite
Citations (6)
Diatom assemblages from the surface sediments of the Chukchi Sea have been studied. The diatom taxonomic com-position, ecological structure and their quantitative content were analyzed. 138 diatom species belonging to 55 genera were identi ed. Most common genera are Navicula (17 species), Chaetoceros (13 species), Thalassiosira (10 species). fiThe obtained data will be used for future paleogeographical and paleoecological reconstructions. Key words: Diatoms, surface sediments, the Chukchi Sea.
Navicula
Chaetoceros
Cite
Citations (0)
Seasonality and composition of epipelic diatom community were studied for two years in two wetlands of Bangladesh namely, Joysagar and Sitlai Beel. A total 73 diatom taxa were recorded. The average density of epipelic diatom was higher in Sitlai Beel (52.97 × 104/g sediment) than in the Joysagar (3.92 × 104/g sediment). The epipelic diatom community of Joysagar was dominated by the species of Melosira, Synedra, Navicula, Pinnularia, Gomphonema, and Nitzschia, whereas Melosira, Navicula, Pinnularia, Cymbella and Gomphonema dominated in Sitlai Beel. Melosira granulata, Navicula americana, Pinnularia major, and Gomphonema lanceolatum were dominant and expressed distinct seasonality in both wetlands. The concentration of soluble reactive silicate of water and the average density of epipelic diatom did not express any significant relation in both of the water bodies. The concentration of phytoplankton chl a had a positive relationship with epipelic diatoms and was significant in Sitlai Beel. Key words: Epipelic diatoms; Sitlai Beel; Wetlands; Melosira; Bangladesh DOI: 10.3329/bjb.v39i1.5523Bangladesh J. Bot. 39(1): 29-36, 2010 (June)
Navicula
Nitzschia
Seasonality
Fragilaria
Cite
Citations (1)