A Study On The Diversity Of Subaerial Algae In Southern Georgia
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A Study On The Diversity Of Subaerial Algae In Southern Georgia
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Author : John D. Griner
language : en
Publisher:
Release Date : 2010
A Study On The Diversity Of Subaerial Algae In Southern Georgia written by John D. Griner and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Algae categories.
Biodiversity And Molecular Systematics Of Subaerial Algae From Africa And The Neotropics
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Author : Haj Abdeslam Allali
language : en
Publisher:
Release Date : 2011
Biodiversity And Molecular Systematics Of Subaerial Algae From Africa And The Neotropics written by Haj Abdeslam Allali and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Electronic dissertations categories.
Algae are a large and diverse group of photosynthetic organisms that range in size from microscopic unicellular to multicellular forms. They usually inhabit marine and freshwater habitats. However, some are terrestrial and are capable of living in soil or above the soil surface (subaerial). Tropical rainforests, with humid climate and diverse habitats, offer phycologists with a rich field for biodiversity exploration. In the past, algae in these environments have been the objective of many studies. However, algae from the African Tropical rainforest have been greatly overlooked. This investigation is targeting the biodiversity of subaerial algae from an African tropical rainforest in Gabon (Africa) as well as a Neotropical forest in Panama (Central America). During this investigation biodiversity studies were based on traditional assessments as well as state of the art technology such as metagenomic approaches. In this study, morphology based and molecular phylogenetic protocols have been integrated to elucidate the biodiversity and systematics of the subaerial green algal order Trentepohliales from Gabon, Africa. Based on morphological observations 14 species of Trentepohlia and Printzina (belonging to the order Trentepohliales) were found to occur in Gabon (six were newly recorded for the continent). Molecular phylogenetics of the Trentepohliales from Africa suggested that the genera Trentepohlia and Printzina are not monophyletic lineages. These results also suggested that a taxonomic reassessment of the Trentepohliales is necessary. The African subaerial algal biodiversity was assessed using a novel metagenomic approach at a broader taxonomic level. Results of this approach suggest that the African rainforest is home to green algal (Chlorophyta), cyanobacteria, and diatoms (Sramenopiles) taxa. Finally, Panamanian subaerial diversity was also evaluated using a metagenomic approach with an ecological application: the biodiversity of the epiphytic flora was compared in four different tree heights as well as the potential effect of the orientation (East versus West). Results of this investigation indicate that the distribution of the algal diversity in terms of major groups was essentially following a similar pattern along the vertical gradient in the forest canopy. In contrast, the distribution of algal groups and specialized taxa was dissimilar between Western and Eastern faces of trees.
Biodiversity And Systematics Of Subaerial Algae From The Neotropics And Hawaii
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Author : Daryl W. Lam
language : en
Publisher:
Release Date : 2010
Biodiversity And Systematics Of Subaerial Algae From The Neotropics And Hawaii written by Daryl W. Lam and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Electronic dissertations categories.
Algae are a diverse assemblage of photosynthetic organisms that includes prokaryotes (Cyanobacteria) as well as unicellular and multicellular eukaryotes. They inhabit freshwater, saltwater, and terrestrial ecosystems. Terrestrial algae include microscopic photobionts that thrive (both in abundance and diversity) in humid conditions. Unfortunately, terrestrial algae are an understudied group in the field of biology. This dissertation presents algal systematic research from the neotropical rainforests of Panama (Central America) and Suriname (South America) as well as coastal areas of Oahu, Hawaii (USA). Finally, an overall phylogeny of all green algae is inferred through multigene molecular phylogenetic inference. Biodiversity assessments were based on environmental cloning and sequencing. Systematic biology techniques included morphological observations via light and electron microscopy from specimens isolated through unialgal culture. Systematic assessments were further confirmed through molecular phylogenetic trees reconstructed by Bayesian inference, maximum likelihood, and parsimony methods. Environmental sequencing results suggest that the Surinamese rainforest Raleighvallen is comprised of various green algal (Chlorophyta), nostocalean (Cyanobacteria), and diatom (Heterokontophyta) taxa. Molecular phylogenetic analyses of the green algal order Trentepohliales collected from Panama strongly suggest that the genera Printzina and Trentepohlia do not form separate monophyletic lineages. These results indicate that the morphological characteristics currently used to distinguish these two genera need to be reassessed. The green alga Spongiochyris hawaiiensis is a common epiphyte found on the bark of Casuarina trees in Waimanalo state park on the island of Oahu. Molecular phylogenetic analyses as well as electron microscopy observations of this alga strongly suggest that it belongs to the order Cladophorales. Finally, a multigene phylogeny of green algae from all habitats (marine, freshwater, and terrestrial) was inferred from GenBank and unpublished sequences. Within the division Chlorophyta, the classes Chlorophyceae, Trebouxiophyceae, and Ulvophyceae formed separate monophyletic or natural assemblages. Furthermore, this phylogeny strongly suggests that there were multiple migration events from aquatic environments (from both fresh and marine waters) to land within the Chlorophytan algae.
Subaerial Algae From South Africa
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Author : H. Printz
language : en
Publisher:
Release Date : 1920
Subaerial Algae From South Africa written by H. Printz and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1920 with categories.
Assessment Of Molecular Approaches In Studying Algal Diversity
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Author : Abeselom Z. Geletu
language : en
Publisher:
Release Date : 2012
Assessment Of Molecular Approaches In Studying Algal Diversity written by Abeselom Z. Geletu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
A Seasonal Floristic Survey Of Corticolous Subaerial Algae In North Carolina
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Author : Patricia Ann Wylie
language : en
Publisher:
Release Date : 1971
A Seasonal Floristic Survey Of Corticolous Subaerial Algae In North Carolina written by Patricia Ann Wylie and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with categories.
The Subaerial And Freshwater Algal Flora Of The Tropic
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Author : Felix Eugene Fritsch
language : en
Publisher:
Release Date : 1907
The Subaerial And Freshwater Algal Flora Of The Tropic written by Felix Eugene Fritsch and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1907 with Algae categories.
The Ecology Of Cyanobacteria
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Author : B.A. Whitton
language : en
Publisher: Springer Science & Business Media
Release Date : 2000-06-30
The Ecology Of Cyanobacteria written by B.A. Whitton and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000-06-30 with Science categories.
... Begins with an overview of ... blue-green algae ... then looks at their diversity in the geological record and ... their ecology in present environments
Life In The Frozen State
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Author : Barry J. Fuller
language : en
Publisher: CRC Press
Release Date : 2004-05-10
Life In The Frozen State written by Barry J. Fuller and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004-05-10 with Medical categories.
While it is barely 50 years since the first reliable reports of the recovery of living cells frozen to cryogenic temperatures, there has been tremendous growth in the use of cryobiology in medicine, agriculture, horticulture, forestry, and the conservation of endangered or economically important species. As the first major text on cryobiolog
The Ecology Of Cyanobacteria
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Author : B.A. Whitton
language : en
Publisher: Springer Science & Business Media
Release Date : 2007-05-08
The Ecology Of Cyanobacteria written by B.A. Whitton and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-05-08 with Science categories.
Cyanobacteria make a major contribution to world photosynthesis and nitrogen fixation, but are also notorious for causing nuisances such as dense and often toxic `blooms' in lakes and the ocean. The Ecology of Cyanobacteria: Their Diversity in Time and Space is the first book to focus solely on ecological aspects of these organisms. Its twenty-two chapters are written by some thirty authors, who are leading experts in their particular subject. The book begins with an overview of the cyanobacteria - or blue-green algae, for those who are not specialists - then looks at their diversity in the geological record and goes on to describe their ecology in present environments where they play important roles. Why is one of the key groups of organisms in the Precambrian still one of the most important groups of phototrophs today? The importance of ecological information for rational management and exploitation of these organisms for commercial and other practical purposes is also assessed. Accounts are provided of nuisances as well as the ecology of the commercially successful Spirulina and the role of cyanobacteria in ecosystem recovery from oil pollution. Many chapters include aspects of physiology, biochemistry, geochemistry and molecular biology where these help general understanding of the subject. In addition there are three chapters dealing specifically with molecular ecology. Thirty-two pages of colour photos incorporate about seventy views and light micrographs. These features make the book valuable to a wide readership, including biologists, microbiologists, geologists, water managers and environmental consultants. The book complements the highly successful The Molecular Biology of Cyanobacteria already published by Kluwer.