Diatoms, collected during the expedition of the Vega

Abstract

VEBA-EXPEDITIONENS VETEN SK APLIG A ABBETEN.^^9 to trace out the limits of the species. , Also were rich, but less interesting materials obtained from algse, collected near Cape Deschnew. Several samples of the bottom-mud from the North Siberian Sea were also taken, but in examining them I could not find a trace of diatoms. All the materials from the expedition of the Vega have been examined by myself. Still more materials from the hyperboreal America were collected during the British expedition under the command of Sir George Nares and examined by Mr. G. Dickie'. Afterwards I have received, through the kindness of Prof. Oliver, some of these samples. Among them only three were rich enough to be subjected to the usual cleaning-process, viz. from JBessel's Bay, 81°7' N, Mushroom Point, 82°28' N, and Discovery Bay, 81°41'. The result of my examination of these gatherings are to be found in the following pages. Also from the distant Franz Joseph Land some diatomaceous gatherings have been collected on the ice-flakes during the Austrian expedition under Weyprecht. Some of the species found by Mr. Grunow in these materials have been published in Van Heurck's Synopsis and issued in CI. and MoUer Diat. No 314. Mr. Grunow will later publish in a more complete manner his researches in regard to these most interesting diatoms. The materials brought together from the Arctic Sea are thus very considerable, and their examination may give a tolerably complete idea of the diatomaceous vegetation the Arctic Sea. I have therefore tried to give in the following pages a complete list of all the arctic species, found by myself and by Mr. Grunow, omitting those found by other authors, not beeiug sure about their determinations.

Identification of Some Easily Confused Common Diatom Species in Arctic Spring Blooms

“…Phytoplankton and ice algae have been recorded from Arctic seas for more than a hundred years (Cleve 1864, 1873, 1883, 1896, Grunow 1884, Østrup 1895, 1897, Gran 1897. The research included studies of seasonal variation (Cleve 1896, Gran 1897a, 1904, Nansen 1906, as well as distribution according to different water masses (Gran 1897b, Cleve 1899, Cleve 1900, Gran 1902, Gran 1908.…”

MORPHOLOGICAL STUDIES OF SOME MARINE MASTOGLOIA (BACILLARIOPHYCEAE) BELONGING TO SECTION SULCATAE, INCLUDING THE DESCRIPTION OF NEW SPECIES

“…jelineckii exhibits a large worldwide distribution by being present in the Mediterranean Sea (Hustedt ), Corsica, France (Peragallo and Peragallo ), Honduras (Grunow ), Bahamas (Hein et al. ), and the Arctic Ocean (Cleve ), whereas our rare specimens were from Siladen, Indonesia (Fig. ).…”

“…The predominantly marine and benthic diatom genus Mastogloia Thwaites ex W. Smith is typified by Dickieia dansei Thwaites (= M. dansei [Thwaites] Thwaites ex W. Smith). Mastogloia is one of the largest diatom genera Stephens 1985, Ricard 1987), with some 410 recognized taxa (Novarino 1989), and is distributed worldwide from tropical to temperate regions (Voigt 1942, 1952, Ricard 1973, 1975, Stephens and Gibson 1980, Navarro et al 1989, Hein et al 2008, Pennesi et al 2011, including scarce occurrences in polar seas (Cleve 1883).…”

“…Despite some occurrences in freshwater and hypersaline lakes, the genus Mastogloia is mainly represented in brackish and marine waters , Witkowski et al 2000. It is mainly distributed in tropical and subtropical regions , Hein et al 1993, Witkowski et al 2000, Pennesi et al 2011, also present in temperate (Hustedt 1955, Witkowski et al 2000, Pennesi et al 2011, and polar and sub-polar regions (Cleve 1883.…”

Morphology of four plagiogrammacean diatoms; Dimeregramma minor var. nana, Neofragilaria nicobarica, Plagiogramma atomus and Psammogramma vigoensis gen. et sp. nov., and their phylogenetic relationship inferred from partial large subunit rDNA

“…The sternum of our specimen seems to be broader than in the original. Rhaphoneis bilineata Grunow et Cleve is morphologically similar to N. nicobarica, but is more finely striated (seven in 10 μm; Cleve 1883 as R.? bilineata ; seven to eight in 10 μm by Foged 1975).…”