Discovering the diversity and functionality of diazotrophs in the East Mediterranean Sea (DIAZOGENE)

Date

2018-12-31

Author

Ibello, Valeria
Küçükavşar, Selin

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

352
views

0
downloads

Biological nitrogen fixation (NF) is the process transferring nitrogen (N) from atmosphere to ocean interior. Primary production in the sea, often limited by the scarcity of N, benefits by the activity of marine diazotrophs, able to convert N2 gas into organic form. N2 can be fixed following two main pathways: i) autotrophic process, in the euphotic layer and ii) heterotrophic process all over the water column. Although, occurrence of marine autotrophic NF is largely documented, a proper understanding of its ecological role, limiting and triggering factors is still missing. On the other side, heterotrophic NF in surface and deep ocean, has just been recently reported. Investigating gene diversity and gene expression can provide important information about role and functioning of these organisms.In the current study, we aim to analyze the diversity, functionality and abundance of both autotrophic and heterotrophic N2-fixing community in the East Mediterranean Sea. Metatranscriptomic analysis, revealing gene expression of the bacterial community will be carried out, in the surface and deep layers. Sampling will continue for one year, in four seasons at Erdemli Time Series site (ETS).Metatranscriptomic data will be coupled to a large dataset of parameters (metagenomic, NF rates, biogeochemical and physical measures) collected during a parallel project focusing on marine microbial community (TUBITAK, 116Y629), which will also provide logistics support for the field activities.

Subject Keywords

Biyolojik Oşinografi, Mikrobiyoloji

URI

https://hdl.handle.net/11511/62114

Collections

Graduate School of Marine Sciences, Project and Design

Suggestions

OpenMETU
Core

Investigation of the interaction of CO₂ and CH₄ hydrate for the determination of feasibility of CO₂ storage in the Black Sea sediments Örs, Oytun; Sınayuç, Çağlar; Department of Petroleum and Natural Gas Engineering (2012) Recently, carbon dioxide injection into deep sea sediments has become one of the carbon dioxide mitigation methods since carbon dioxide hydrates are stable at the prevailing pressure and temperature conditions. The Black Sea, which is one of the major identified natural methane hydrate regions of the world, can be a good candidate for carbon dioxide storage in hydrate form. Injected carbon dioxide under the methane hydrate stability region will be in contact with methane hydrate which should be analyzed tho...
Investigation of 8-year-long composition Record in the Eastern Mediterranean Precipitation Işıkdemir, Özlem; Tuncel, Süleyman Gürdal; Department of Environmental Engineering (2006) Measurement of chemical composition of precipitation is important both to understand acidification of terrestrial and aquatic ecosystems and neutralization process in the atmosphere. Such data are scarce in the Mediterranean region. In this study, chemical composition of daily, wet-only, 387 number of rain water samples collected between 1991 and 1999 were investigated to determine levels, temporal variation and long-term trends in concentrations of major ions and trace elements between 1991 and 1999. Sampl...
Investigation of the impact of the nonlinear relations among soil moisture products over data fusion process Afshar, Mehdi; Bulut, Burak; Yılmaz, Mustafa Tuğrul (2017-04-28) Soil moisture is one of the terrestrial essential climate variables that has critical role in the water, energy, and carbon cycles. There are different ways available for the retrieval of this essential variable (e.g., remote sensing, hydrological models, insitu measurements, and etc.). However, the time series of these retrievals often contain systematic differences, which need to be removed via different rescaling approaches before these data sets could be used in data fusion type studies. In this study, ...
Modeling the Impact of Macrozooplankton on Carbon Export Production in the Southern Ocean Karakus, Onur; Voelker, Christoph; Iversen, Morten; Hagen, Wilhelm; Wolf-Gladrow, Dieter; Fach Salihoğlu, Bettina Andrea; Hauck, Judith (2021-12-01) Macrozooplankton and its grazing pressure shape ecosystem structures and carbon pathways in the Southern Ocean. Here, we present the implementation of "polar macrozooplankton" as a plankton functional type and a related fast-sinking detritus class (fecal pellets) into the biogeochemical model REcoM-2. We use the model to assess major carbon pathways and ecosystem structure in the Southern Ocean south of 50 degrees S. The model represents zooplankton biomass and its spatial distribution in the Southern Ocean...
Evaluation of near-surface air temperature reanalysis datasets and downscaling with machine learning based Random Forest method for complex terrain of Turkey Hasan Karaman, Çağrı; Akyürek, Sevda Zuhal (2023-01-01) Near-surface air temperature is a key variable used in a wide range of applications showing the environmental conditions of the Earth. Standard meteorological observations generally provide the best estimation with high accuracy over time for a small area of influence. However, considerable uncertainty arises when point measurements are extrapolated or interpolated over much larger areas. Satellite and reanalysis products have emerged as a viable alternative or supplement to in situ observations due to thei...

Citation Formats

V. Ibello and S. Küçükavşar, “Discovering the diversity and functionality of diazotrophs in the East Mediterranean Sea (DIAZOGENE),” 2018. Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/62114.