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Aquatic Chemistry
Conditional Remix & Share Permitted
CC BY-NC-SA
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This course details the quantitative treatment of chemical processes in aquatic systems such as lakes, oceans, rivers, estuaries, groundwaters, and wastewaters. It includes a brief review of chemical thermodynamics that is followed by discussion of acid-base, precipitation-dissolution, coordination, and reduction-oxidation reactions. Emphasis is on equilibrium calculations as a tool for understanding the variables that govern the chemical composition of aquatic systems and the fate of inorganic pollutants.
This course is offered through The MIT/WHOI Joint Program. The MIT/WHOI Joint Program is one of the premier marine science graduate programs in the world. It draws on the complementary strengths and approaches of two great institutions: the Massachusetts Institute of Technology (MIT) and the Woods Hole Oceanographic Institution (WHOI).

Subject:
Applied Science
Chemistry
Engineering
Environmental Science
Hydrology
Physical Science
Material Type:
Full Course
Provider:
MIT
Provider Set:
MIT OpenCourseWare
Author:
Moffett, Jim
Seewald, Jeff
Tivey, Meg
Date Added:
09/01/2005
Characterizing the forces shaping the bacterial communities on ocean pier surfaces
Unrestricted Use
CC BY
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This resource is a video abstract of a research paper created by Research Square on behalf of its authors. It provides a synopsis that's easy to understand, and can be used to introduce the topics it covers to students, researchers, and the general public. The video's transcript is also provided in full, with a portion provided below for preview:

"Bacteria and other microorganisms cover nearly every surface on earth, including the surfaces we build and maintain. Ocean piers are unique sites at the intersection of terrestrial, aquatic, and human-built environments. Saltwater spray, inclement weather, and pollutants make piers a harsh environment for bacteria. Together, these factors suggest that piers house a unique microbiome. Researchers recently conducted a study to characterize the microbiomes found on pier surfaces. On nine piers along the coast of Hong Kong, the researchers found diverse microbiomes that were rich in novel bacterial species. Surface material (metal versus concrete) was the strongest factor influencing the bacterial community structure. Although the overall abundance was low, corrosion-associated bacteria were more prevalent on metal surfaces, and high-touch surfaces like handrails and poles had more human skin-associated microbes than other surfaces..."

The rest of the transcript, along with a link to the research itself, is available on the resource itself.

Subject:
Biology
Life Science
Material Type:
Diagram/Illustration
Reading
Provider:
Research Square
Provider Set:
Video Bytes
Date Added:
03/01/2022
Ecological interactions between anammox and denitrifying bacteria
Unrestricted Use
CC BY
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0.0 stars

This resource is a video abstract of a research paper created by Research Square on behalf of its authors. It provides a synopsis that's easy to understand, and can be used to introduce the topics it covers to students, researchers, and the general public. The video's transcript is also provided in full, with a portion provided below for preview:

"Nitrogen is vital to aquatic ecosystems. But too much nitrogen, which can build up from fertilizer use or wastewater discharge, can be deadly. A recent study examined how two groups of nitrogen-removing bacteria interact in the hopes of discovering a synergy that can help remediate over-nitrified lakes. The two groups consisted of anammox bacteria, which feed on ammonium and release nitrogen gas and denitrifying bacteria, which do the same but feed on nitrates instead. Researchers locked the bacteria in bioreactors and monitored their activity for over a year as they fed on sediments from a nitrogen-rich lake. Findings revealed high nitrogen removal efficiencies of up to 86% for ammonium and 95% for nitrites with denitrifying and anammox bacteria showing signs of cooperation. For example, certain denitrifiers may provide amino acids and vitamins that support anammox bacteria..."

The rest of the transcript, along with a link to the research itself, is available on the resource itself.

Subject:
Biology
Life Science
Material Type:
Diagram/Illustration
Reading
Provider:
Research Square
Provider Set:
Video Bytes
Date Added:
04/24/2023
Minnesota peat viromes reveal insights into global viral ecology
Unrestricted Use
CC BY
Rating
0.0 stars

This resource is a video abstract of a research paper created by Research Square on behalf of its authors. It provides a synopsis that's easy to understand, and can be used to introduce the topics it covers to students, researchers, and the general public. The video's transcript is also provided in full, with a portion provided below for preview:

"Viruses might be small, but they drive ecological change across the planet. That includes helping lock otherwise harmful carbon away in soil. Unfortunately, little is known about soil viruses worldwide. A recent study extensively examined the viral microbiome of a Minnesotan peatland from the experimental site SPRUCE. Peatlands are the largest natural terrestrial reservoirs of carbon on earth and, as such, are a critical component of the carbon cycle. The makeup of viral communities in the SPRUCE peat varied with sample depth, water content, and carbon chemistry factors. Of the 4,326 distinct virus types identified from SPRUCE, only 164 had been previously detected in other soils and those matches were almost exclusively from other peatlands. Peatlands are a very wet, but otherwise terrestrial, ecosystem. However, none of the previously detected aquatic viruses matched SPRUCE viruses, which suggests a terrestrial and aquatic ‘species’ divide..."

The rest of the transcript, along with a link to the research itself, is available on the resource itself.

Subject:
Biology
Life Science
Material Type:
Diagram/Illustration
Reading
Provider:
Research Square
Provider Set:
Video Bytes
Date Added:
03/01/2022
A geography of lake carbon cycling
Unrestricted Use
CC BY
Rating
0.0 stars

This resource is a video abstract of a research paper created by Research Square on behalf of its authors. It provides a synopsis that's easy to understand, and can be used to introduce the topics it covers to students, researchers, and the general public. The video's transcript is also provided in full, with a portion provided below for preview:

"Although lakes cover less than 1% of the Earth’s surface, they are an essential component in the planet’s carbon cycle. But there are striking regional differences in the degree of carbon cycling that occurs in lakes, and the underlying causes aren’t well known. To improve understanding of these differences, an international research team has proposed a geographic framework to connect carbon processing at the ecosystem level with regional drivers such as climate, land cover, and human activity. Based on this framework, they’ve described two mechanisms that explain geographic differences in carbon cycling, providing new insight into the role of inland waters in the broader global carbon cycle. The first mechanism proposes that regional differences in lake carbon cycling are linked to whether water color exceeds a threshold level. Where these levels fall in relation to this threshold affects ecosystem patterns, such as lake metabolic status..."

The rest of the transcript, along with a link to the research itself, is available on the resource itself.

Subject:
Oceanography
Physical Science
Material Type:
Diagram/Illustration
Reading
Provider:
Research Square
Provider Set:
Video Bytes
Date Added:
09/20/2019