Microbial Utilization and Turnover of Organic Carbon in Santa Monica Basin Sediments PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Microbial Utilization and Turnover of Organic Carbon in Santa Monica Basin Sediments PDF full book. Access full book title Microbial Utilization and Turnover of Organic Carbon in Santa Monica Basin Sediments by D. B. Craven. Download full books in PDF and EPUB format.
Author: D. B. Craven
Publisher:
ISBN:
Category : Biomass
Languages : en
Pages :
Get Book Here
Book Description
Author: D. B. Craven
Publisher:
ISBN:
Category : Biomass
Languages : en
Pages :
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 49
Get Book Here
Book Description
Sediment microbial community biomass and activity in Santa Monica Basin, a nearshore basin in the California Continental Borderland, were examined in October 1985, 1986 and 1987, May 1986, April 1987 and January 1990. Millimeter-scale ATP profiles and incubation of intact cores with 3H-adenine indicated a high-biomass interface microbial population in the low-oxygen central basin, which was absent in samples from the basin slope sediments. A majority of microbial activity and organic matter mineralization occurred in the top cm of sediment. Comparison of measured ATP and total organic carbon profiles suggest that the C:ATP ratio (wt:wt) ranges between 47:1 and 77:1 in central basin interfacial populations, substantially lower than reported for other aquatic environments. Carbon production estimated from DNA synthesis measurements via 3H-adenine incorporation was compared with TCO2 fluxes measured by in situ benthic chamber experiments. Within the uncertainty of the C:ATP ratio, an overall microbial carbon assimilation efficiency of 75--90% was indicated. The low C:ATP ratios and high carbon assimilation efficiencies significantly affect estimates of microbial growth and respiration and are substantially different than those often assumed in the literature. These results suggest that without independent knowledge of these ratios, the uncertainty in tracer-derived microbial growth and respiration rates may be larger than previously reported. 66 refs., 8 figs., 3 tabs.
Author:
Publisher:
ISBN:
Category : Marine biology
Languages : en
Pages : 1070
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Ecology
Languages : en
Pages : 914
Get Book Here
Book Description
Author: Murray D. Dailey
Publisher: Univ of California Press
ISBN: 0520322401
Category :
Languages : en
Pages : 1271
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 756
Get Book Here
Book Description
Author: Alan E. S. Kemp
Publisher: Geological Society of London
ISBN: 9781897799673
Category : Nature
Languages : en
Pages : 278
Get Book Here
Book Description
The magnitude and causes of decadal to century-scale changes in climate are major issues of global concern. The separation of anthropogenically driven change from natural 'baseline' variability within the atmosphere/ocean system is a prerequisite to identifying human impact on global climate. An understanding of past climate variability is therefore a key to predicting future climate change. The sedimentary record of the oceans, seas and lakes is produced by a series of depositional events that occur on seasonal timescales but can rarely be resolved due to mixing of the sediment by bottomdwelling organisms. Where they are preserved, laminated sediments act like tree rings to record these seasonal-scale processes, such as plankton blooms and floods, and provide a uniquely high-resolution record of environmental change. In addition, annually laminated or 'varved' sediment sequences act as geochronometers against which other timescales can be tested. Laminated sediments may therefore be used to develop records of interannual and decadal-scale variability which serve to test models of climate change. The authors cover a range of topics that include strategies for study and techniques of analysis. A series of case studies, dealing with a variety of lacustrine and marine records, illustrates the wide potential of laminated sediments as palaeoclimatic and palaeoceanographic indicators.
Author: Stephen M. Monk
Publisher:
ISBN:
Category :
Languages : en
Pages : 158
Get Book Here
Book Description
Author: Hendrik de Haas
Publisher: Faculteit Aardwetenschappen Universiteit Utrecht
ISBN:
Category : Burial
Languages : en
Pages : 164
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 648
Get Book Here
Book Description
