1. Unlike pennate diatoms, centric diatoms never have a raphe.

2. Axenicity of diatom cultures microscopically

3. Diatoms and other tiny organisms form Antarctic plankton.

4. 9 Fig. Scanning electron micrograph of a diatom.

5. 23 Fig. Scanning electron micrograph of a diatom.

6. Some ocean diatoms are mostly inert , crystallized calcium.

7. Amphora is a major genus of marine and freshwater diatoms

8. Observations of assemblage physiognomy by scanning electron microscopy revealed that at low irradiances, a densely packed understory of adnate diatoms, with a few overstory diatoms, covered the tile surface.

9. Successful infection takes place always at the areolae of the diatom wall.

10. Some dinophytes, like Kryptoperidinium and Durinskia have a diatom (heterokontophyte) derived chloroplast.

11. From 1970–1990, the diatom assemblage was dominated by alkaliphilic or pH-indifferent taxa.

12. Same with diatoms, which are shown right here, which are glasseous structures.

13. Every time the diatoms replicate, they give the genetic information that says,

14. Key words: Adpressed diatoms, annual cycle, light optimum, periphyton, upright algae, vortical zonation Introduction

15. 8 Stringer now works on Two Tree Island amassing information and collecting diatoms.

16. Algae, which are now regarded as protoctists, include the seaweeds, diatoms, and spirogyra

17. Diatoms are first dominated by alkaliphil species, reflecting continued influence of glaciolacustrine sedimentation.

18. More light is refracted below the surface, and algae, especially diatoms. rapidly become plentiful.

19. Here we provide proof that the causative agent, domoic acid, is indeed produced by this diatom.

20. Diet This fish eats primarily aquatic insects, some terrestrial insects, fish eggs, algae and diatoms.

21. The first 0.5 cm of gyttja contained an acidophilous diatom flora resembling that of underlying mineral sediments.

22. Primary production is based mainly on diatoms, living in the ice and in open water.

23. The transition to organic-rich silt and peat and an aerophile diatom assemblage marks channel abandonment.

24. 14 The food composition consisted of eight groups: diatom, protozoa, spongiaria, annelida, mollusca, crustacea, echinodermata and pisces.

25. (1998) New combinations for some taxa of Navicula and Stauroneis, and Avowed substitute for a taxon of Eunotia Diatom 14: 69-71.

26. Cherts often have an “indirect” biogenic origin as they result from re-precipitation of dissolved opal-A shells derived from microorganisms such as diatoms (diatomite , diatomaceous Cherts, see also entry “ Diatoms ”) and radiolarians (radiolarite , see also entry “ Protozoa (Heterotroph, Eukaryotic) ”).

27. Bacterial colonization occurred initially and was rapidly followed by the development of a monolayer of adnate diatoms.

28. In the petroleum industry, Biostratigraphy often denotes the use of terrestrial (pollen and spores) and marine (diatoms, foraminifera

29. Diatoms A phylum of the protoctista whose members are unicellular algae found in freshwater, the sea, and soil.

30. 17 Though Stringer is not a microscopist by trade, he has been interested in diatoms for over 60 years.

31. Many Bedded cherts are made up of the remains of siliceous organisms such as diatoms, radiolarians, or sponge spicules

32. Thereafter, and throughout the late glacial and earliest Holocene, diatom floras were dominated by alkaliphilous and circumneutral species of Fragilaria.

33. The vertical zonation of Adpressed diatoms and other epiphytic algae on Phragmites australis - Volume 34 Issue 5 - UTE MÜLLER

34. L'invention a trait à un Cataplasme ou enduit perdu composé de matériau fibreux et de terre à diatomées

35. These organisms are found in the supergroups Chromalveolata (dinoflagellates, diatoms, golden Algae, and brown Algae) and Archaeplastida (red Algae and green Algae)

36. Chiton larvae feed on diatoms and other plankton until they settle out of the water column and metamorphose into the adult form

37. The flora of the lake bottom sediments is composed of planktonic, periphytic, and aerophilous diatom taxa, with Cyclotella stelligera and Tabellaria flocculosa as dominant species.

38. Diatoms first appear in pollen zone A and consist mainly of the littoral forms Cymbella diluviana, Fragilaria lapponica, and F. construens var. venter.

39. Every time the diatoms replicate, they give the genetic information that says, "Here's how to build glass in the ocean that's perfectly nanostructured."

40. A multidisciplinary approach involving airphoto analysis, offshore geophysical surveys, sediment coring, and facies and diatom analyses was used in this study of the Nastapoka River delta.

41. The diatom taxa, representing mostly acidophilous and indifferent species, were identified from the moss and brook sediment on the shore of the lake and from four bottom sediments samples.

42. Included organisms range from unicellular microAlgae, such as Chlorella and the diatoms, to multicellular forms, such as the giant kelp, a large brown Alga which may

43. Amnesic Shellfish Poisoning (ASP) is a very rare form of food-borne illness caused by a toxin called domoic acid which is secreted by diatoms in the genus Pseudo-nitzschia

44. Bryozoans use a food-gathering structure (lophophore) bearing the crown of ciliated tentacles to filter the water and trap algae, small particles of detritus, diatoms and other microscopic organisms

45. "Distance downstream from Cornwall" was determined to be the strongest variable influencing the structure of epilithic diatom assemblages, likely due to the effect of tides (favouring aerophilic species) closer to the river outlet.

46. Diatoms may preferentially use and may use it both Assimilatively and in non‐assimilative photoprotection or energy balance Lomas and Glibert (1999a,b) Growth suppression of productivity in estuaries by elevated loading suggested

47. While the sulphate deposition and diatom-inferred pH changes have not been as great as those observed in other acidified areas of northeastern North America (e.g., Adirondack region of New York or New England), Nova Scotia lakes have experienced biological changes toward more acidophilous diatom assemblages, especially in lakes with low pre-industrial pH values (currently with high DOC concentrations) located in Kejimkujik National Park, which receives the highest loading of sulphate deposition in Nova Scotia.

48. Chrysophyta (golden-brown Algae) The Chrysophyta are the golden-brown Algae and diatoms, which respectively account for 1,100 and 40,000-100,000 species of unicellular Algae.These Algae occur in both marine and fresh waters, although most species are marine.

49. The aim of this study was to begin evaluating the utility of sand crabs (Emerita Analoga) as an indicator species for the algal neurotoxin, domoic acid (DA), in Monterey Bay, California, USA, a site of recurrent blooms of the DA-producing diatom, Pseudo-nitzschia

50. Lawrence fed on invertebrate eggs, cyclopoid copepods and diatoms (Vesin et al., 1981), and Moksness (Moksness, 1982) found that Capelin larvae reared in mesocosms fed on many prey species including polychaete larvae, but there are few studies on Capelin early life history and feeding

51. The food chain tested was composed of the diatomNavicula sp., the bivalveScrobicularia plana, the shore crabCarcinus maenas, and the ratRattus rattus. The diatoms take up large quantities of radiocobalt. The radio-activity accumulated (per unit weight) by the organisms studied decreases from one trophic level to the next.

52. Biological crusts (also known as Cryptogamic, microbiotic, crytobiotic and microphytic crusts) are microscopic non-vascular assemblages composed of blue-green algae, diatoms, golden brown algae, lichens, mosses and a few xerophytic (adapted for growth with a limited water supply) liverworts on more mesic (moderate amount of moisture) sites.

53. Just how these minute but beautiful cases are formed from silicon dissolved in seawater is still a mystery, but what researchers do know is that by absorbing carbon dioxide and releasing oxygen, diatoms play a vital role in sustaining life on earth, perhaps an even more important role than most land plants.