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Freshwater Dinoflagellates Of North America

Author : Susan Carty
ISBN : 9780801470370
Genre : Science
File Size : 50. 14 MB
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Dinoflagellates are common unicellular organisms found in all types of aquatic ecosystems and are important contributors to freshwater ecosystems as significant primary producers of biomass. Despite increasing interest in the biology of living and fossil dinoflagellates, there has been no compilation of dinoflagellate species found in North America since 1934, and no keys to species. In Freshwater Dinoflagellates of North America, Susan Carty provides a much-needed taxonomic guide covering Canada, the United States, Mexico, all of Central America, the Caribbean, and Greenland. Features of the book include • identification of dinoflagellate species, • distribution maps of species, • ecological and morphological keys to genera, • key to species within genus, • lists of references by location, • glossary, and • an extensive illustration program. Following an introductory section on the biology, morphology, and ecology of freshwater dinoflagellates, the species are presented in a field guide format with distribution maps, written descriptions emphasizing notable features, line drawings, and black-and-white and color micrographs.

Freshwater Algae Of North America

Author : John D. Wehr
ISBN : 9780123858771
Genre : Science
File Size : 30. 78 MB
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Freshwater Algae of North America: Ecology and Classification, Second Edition is an authoritative and practical treatise on the classification, biodiversity, and ecology of all known genera of freshwater algae from North America. The book provides essential taxonomic and ecological information about one of the most diverse and ubiquitous groups of organisms on earth. This single volume brings together experts on all the groups of algae that occur in fresh waters (also soils, snow, and extreme inland environments). In the decade since the first edition, there has been an explosion of new information on the classification, ecology, and biogeography of many groups of algae, with the use of molecular techniques and renewed interest in biological diversity. Accordingly, this new edition covers updated classification information of most algal groups and the reassignment of many genera and species, as well as new research on harmful algal blooms. Extensive and complete Describes every genus of freshwater algae known from North America, with an analytical dichotomous key, descriptions of diagnostic features, and at least one image of every genus. Full-color images throughout provide superb visual examples of freshwater algae Updated Environmental Issues and Classifications, including new information on harmful algal blooms (HAB) Fully revised introductory chapters, including new topics on biodiversity, and taste and odor problems Updated to reflect the rapid advances in algal classification and taxonomy due to the widespread use of DNA technologies

Methods In Stream Ecology

Author : F. Richard Hauer
ISBN : 9780124165786
Genre : Science
File Size : 87. 16 MB
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Methods in Stream Ecology provides a complete series of field and laboratory protocols in stream ecology that are ideal for teaching or conducting research. This two part new edition is updated to reflect recent advances in the technology associated with ecological assessment of streams, including remote sensing. Volume focusses on ecosystem structure with in-depth sections on Physical Processes, Material Storage and Transport and Stream Biota. With a student-friendly price, this Third Edition is key for all students and researchers in stream and freshwater ecology, freshwater biology, marine ecology, and river ecology. This text is also supportive as a supplementary text for courses in watershed ecology/science, hydrology, fluvial geomorphology, and landscape ecology. Provides a variety of exercises in each chapter Includes detailed instructions, illustrations, formulae, and data sheets for in-field research for students Presents taxonomic keys to common stream invertebrates and algae Includes website with tables and a link from Chapter 22: FISH COMMUNITY COMPOSITION to an interactive program for assessing and modeling fish numbers Written by leading experts in stream ecology

Methods For Collection And Analysis Of Aquatic Biological And Microbiological Samples

Author : Phillip E. Greeson
ISBN : MINN:31951D032545067
Genre : Aquatic biology
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Transferring The Freshwater Dinoflagellate Peridinium Wisconsinense Dinophyceae To The Family Thoracosphaeraceae With The Description Of Fusiperidinium Gen Nov

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ISBN : OCLC:1051838122
Genre :
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Distinctive spindle‐shaped thecae first described by Samuel Eddy in 1930 and assigned to the genus Peridinium Ehrenberg are commonly reported from freshwater environments in eastern North America. We demonstrate that thecae incubated from cysts of Peridinium wisconsinense Eddy have six cingular plates and a protuberant apical pore complex characteristic of the family Thoracosphaeraceae Schiller 1930 emend. Tangen in Tangen et al . 1982. Small subunit ribosomal DNA (SSU rDNA) and internal transcribed spacer (ITS) sequences confirm the close genetic similarity with Chimonodinium lomnickii (Wołoszyńska) Craveiro, Calado, Daugbjerg, Gert Hansen & Moestrup and with species recently reassigned to the genus Apocalathium Craveiro, Daugbjerg, Moestrup & Calado that was inferred from previously published LSU rDNA analysis of cysts of P. wisconsinense . Despite sharing identical tabulation with the thoracosphaeracean genera Chimonodinium Craveiro, Calado, Daugbjerg, Gert Hansen & Moestrup and Apocalathium, substantial morphological differences in the morphology of both the thecate and cyst stages of P. wisconsinense led us to reassign this species to the genus Fusiperidinium gen. nov. The phylogenetic position of Fusiperidinium wisconsinense comb. nov., inferred from concatenated data of SSU and LSU sequences, suggests that it evolved from the brackish Scrippsiella lineage, independently of the transition that produced the family Peridiniaceae. Cysts described as Geiselodinium tyonekensis Engelhardt from nonmarine strata from Alaska are apparently identical to the resistant cysts produced by F. wisconsinense . The palynologically‐constrained late Middle Miocene age for the Tyonek Formation provides a minimum age of 11.6 Ma for the evolution of this lineage, coinciding with a rapid glacioeustatic decline in sea level. Our findings also call into question the inclusion of the family Thoracosphaeraceae within the order Peridiniales Haeckel.

Syesis

Author :
ISBN : WISC:89064063811
Genre : Natural history
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Proceedings Of The Linnean Society Of London

Author : Linnean Society of London
ISBN : CHI:73746740
Genre : Botany
File Size : 76. 98 MB
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Contributions Of Stratigraphic Palynology With Emphasis On North America Cenozoic Palynology

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ISBN : UCSD:31822011235256
Genre : Paleobotany
File Size : 39. 19 MB
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Technical Report Fisheries And Marine Service

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ISBN : UCSD:31822009181058
Genre : Aquatic sciences
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Studies On The Cell Wall Of Dinoflagellate Resting Cysts

Author : John Peter Kokinos
ISBN : UCSD:31822008778615
Genre : Biology
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This thesis presents a series of investigations on the specialized cell covering of a dormant stage (the resting cyst) in the life cycle of the marine dinoflagellate Lingulodinium polyedra. These cell walls, along with those of resting cysts formed by many other dinoflagellate species, are resistant to degradation and persist in the depositional environment. Selective preservation of these materials has created a rich dinoflagellate fossil record (extending back ~225 million years) which has shown great utility in biostratigraphic applications. By elucidating the nature of resting cyst walls and directly observing their development in laboratory cultures, the research presented here addresses several long-standing questions regarding both the paleontology and biology of dinoflagellates. Although resting cyst formation has been reported in other extant species, this thesis documents for the first time the morphological development of resting cysts having "fossilizable", morphologically complex cell walls. In laboratory cultures of L. polyedra, resting cyst formation is an extremely rapid phenomenon; the transition from thecate, actively swimming planozygote to spine-bearing, morphologically mature hypnozygote occurs within 10-20 minutes. The basic mechanism consists of dramatic cell expansion resulting from the widening of an interstice between the planozygotic cytoplasm and a balloon-like membrane external to the theca. Key morphological events in the development of the distinctive L. polyedra resting cyst cell covering occur within this interstice. These include early dissociation and outward migration of the theca, formation of the resistant endophragm, and growth of spines from globules on the surface of the cytoplasm. The level of morphological maturity attained by the encysting cell depends primarily on how much development occurs before rupture of the expanding outer membrane. H rupture is premature, a wide variation of resting cyst morphology may occur, particularly with respect to the size, number, and distribution of processes. The direct observation of these developmental events has shed much light on several issues regarding resting cyst morphogenesis. First, growth of L. polyedra resting cyst spines is clearly centrifugal (i.e. growing radially outward). Although not necessarily representative of spine growth in all species, this mode of formation provides a useful preliminary framework for interpreting some of the "histrichosphaerid" morphologies present in the fossil record. Second, in this species at least, the theca plays no direct role in influencing the morphology of spines. Finally, considerable variation in spine morphology is possible within one biologically-defined species. This last point has considerable significance for cyst-based taxonomy, and strongly suggests that several of the fossil morphotypes traditionally designated as separate species of Lingulodinium are, in fact, synonymous. Ultrastructural examination of L. polyedra resting cysts formed in laboratory culture has shown, for the first time, the fine structure of the cell walls enclosing a living, paleontologically-signillcant resting cyst. Unfortunately, difficulties associated with fixation and infiltration of these thick-walled structures precluded an in-depth investigation of the ultrastructural dynamics underlying the morphological development described above. Preliminary results, however, confirm earlier speculation that only the outermost wall of the L. polyedra resting cyst is normally preserved in the fossil record. This outer wall (including spines) appears constructed of closely appressed structural units, an ultrastructural style apparently widespread among species related to L. polyedra. The resistant cell walls of L. polyedra resting cysts were isolated from laboratory cultures and chemically characterized by an extensive array of analytical techniques. Both thermal (pyrolysis) and chemical (CuO oxidation) dissociation of this material yielded suites of products consistent with a macromolecular substance composed signillcantly of aromatic components. In addition, the relative abundance of carboxylated phenols among resting cyst CuO oxidation products indicated that aromatic structural units in the dinoflagellate material may be largely carbon-carbon linked, probably directly through aromatic nuclei. Such a "condensed" arrangement may be, in part, responsible for the remarkable resistance of the dinoflagellate resting cyst wall biopolymer. Overall, the aromatic signature of L. polyedra resting cyst wall material can be clearly distinguished from that of both pollen wall "sporopollenin" and classical lignin. Although some short chain carboxylic acids are generated during CuO oxidation, there is little evidence obtained by dissociation techniques to suggest the significant presence of extended polymethylenic elements in this macromolecular substance. As a result, the dinoflagellate material appears fundamentally different from the highly aliphatic "algaenans" recently identified in the cell wall of several chlorophyte species. Interestingly, pyrolysis (Py-GC/MS) of resting cyst wall material produced an abundance ofprist-1-ene, strongly suggesting the presence of bound tocopherols which may play an important structural role in the resistant cell wall biopolymer. Lipid analysis of L. polyedra culture extract revealed a series of even carbon numbered fatty acids (C14 - C24), as well as sterols (including dinosterol and cholesterol), and a full suite of tocopherols. These compounds are present during construction of the resistant outer wall of the resting cyst, and could function as precursors to the resting cyst wall biopolymer. Another possibility, given the strong aromaticity predicted by the results of pyrolysis and CuO oxidation, is some contribution by aromatic amino acids in an analogous fashion to lignin biosynthesis. The extensive chemical characterization of the outermost cell wall of L. polyedra resting cysts reported in this thesis provides the first rigorous analysis of "fossilizable" biopolymer(s) produced by an extant dinoflagellate. Furthermore, these analyses represent an unprecedented level of chemical characterization of a resistant algal cell wall biopolymer, and clearly demonstrate the unique nature of the L. polyedra resting cyst wall. As a result, this work provides the first chemical data to justify the term "dinosporin", previously proposed to distinguish the highly resistant material comprising dinoflagellate resting cyst walls from other resistant cell wall biopolymers.

Evolution Of Archeopyle And Tabulation In Rhaetogonyaulacinean Dinoflagellate Cysts

Author : Gunter Dörhöfer
ISBN : CORNELL:31924000656730
Genre : Science
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Special Report

Author :
ISBN : UOM:39015000418296
Genre : Great Lakes (North America)
File Size : 31. 21 MB
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Great Lakes Plankton Investigations

Author : John E. Gannon
ISBN : MINN:31951D01239983C
Genre : Plankton
File Size : 22. 43 MB
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Proceedings Of The North American Paleontological Convention

Author : Ellis Leon Yochelson
ISBN : STANFORD:36105002770613
Genre : Paleontology
File Size : 83. 74 MB
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Journal Of The Minnesota Academy Of Science

Author : Minnesota Academy of Science (1932- )
ISBN : UVA:X006072478
Genre : Science
File Size : 32. 75 MB
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General Zoology

Author : Charles F. Lytle
ISBN : 0697047962
Genre : Zoology
File Size : 61. 14 MB
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Journal Of The Palaeontological Society Of India

Author : Palaeontological Society of India
ISBN : UCSD:31822009667577
Genre : Paleontology
File Size : 44. 76 MB
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Proceedings Of The Linnean Society Of London

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ISBN : UCR:31210011002761
Genre : Natural history
File Size : 61. 3 MB
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Includes list of additions to the library.

The Ohio Journal Of Science

Author :
ISBN : UOM:39015079666601
Genre : Science
File Size : 45. 40 MB
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Includes book reviews and abstracts.

Bulletin

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ISBN : UOM:39015040096938
Genre : Fisheries
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