نتایج جستجو برای: marine sedimentation

تعداد نتایج: 110234  

2002
U. Passow

Since the development of methods to quantify transparent exopolymer particles (TEP) 1993, it has been shown that these gel-particles are not only ubiquitous and abundant, but also play a significant role in the biogeochemical cycling of elements and the structuring of food webs. TEP may be quantified either microscopically or colorimetrically. Although data based on measurements using one or ot...

2016
Benjamin J Tully John F Heidelberg

UNLABELLED The South Pacific Gyre (SPG) possesses the lowest rates of sedimentation, surface chlorophyll concentration, and primary productivity in the global oceans. As a direct result, deep-sea sediments are thin and contain small amounts of labile organic carbon. It was recently shown that the entire SPG sediment column is oxygenated and may be representative of up to a third of the global m...

Hamidreza Peyrowan Khosro Khosrotehrani Mojtaba Taghizade Razieh Lak Seyed Ali Aghanabati

The Wisconsin glaciation was started a approximately 125,000 years ago and reached its lowest extend between 20,000 to 21,000 years ago during which the sea level fell 120 to 130 meter. At the end of the ice age, about 18,000 years ago, the sea level increased and reached its present level about 5,000 years ago. The Persian Gulf was exposed in the last glacial moment (LGM). After this moment, t...

2016
Federica Fava Massimo Ponti Marco Abbiati

Coralligenous biogenic reefs are among the most diverse marine habitats in the Mediterranean Sea. The northern Adriatic mesophotic coralligenous outcrops host very rich and diverse epibenthic assemblages. Several studies quantified the low temporal variability and high spatial heterogeneity of these habitats, while processes driving structuring and differentiation are still poorly understood. T...

2002
Christian E. Hamm

Monospecific diatom cultures (Thalassiosira punctigera and Skeletonema costatum) were incubated in rotating cylinders together with clay suspensions, present in a range of concentrations (5–100 mg kaolinite L21) and as different minerals (50 mg L21 kaolinite, smectite, illite, and clay-sized quartz powder). The addition of lithogenic suspensions to diatom cultures accelerated the formation of v...

Journal: :Biology letters 2011
Susannah M Leahy Mark I McCormick Matthew D Mitchell Maud C O Ferrari

Coral reefs are currently experiencing a number of worsening anthropogenic stressors, with nearshore reefs suffering from increasing sedimentation because of growing human populations and development in coastal regions. In habitats where vision and olfaction serve as the primary sources of information, reduced visual input from suspended sediment may lead to significant alterations in prey fish...

Journal: :Frontiers in Marine Science 2022

Marine pathogens present serious challenges to aquaculture, fisheries productivity, and marine conservation requiring novel solutions identify, control, mitigate their effects. Several ecological habitats, such as mangroves wetlands can recycle waste serve aquatic filtration systems. While nutrient cycling other ecosystem services of these habitats have been well-studied, potential remove mecha...

Journal: :مهندسی سازه 0
عباس شاکری داریان محمد نجمایی

the transfer and sedimentation in storage dams reduce the volume and damage the life of water reservoirs. due to the importance of water, its storage, and the cost time of constructing reservoirs, especially the scarcity of construncting sites for them, a lot of attentions should be given to the sedimentation of dam reservoirs. it requires the estimate of thew sedimentation and its management. ...

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