User:OsmanK2109/sandbox

Article Evaluation
Here are my notes for the selected articles (Oxygen cycle, Sulfur cycle and Iron cycle) for the Biogeochemical Cycles course (2023 spring) assignment.

Content
The article has relevant information related to the topic and has appropriate links to related topics within the article. However, it has a terrible structure without proper headings/sections. After the introduction, it directly jumps to the earth surface reservoirs with subheadings (Atmosphere, Biosphere, Hydrosphere and Lithosphere) with a limited information in each and without a brief introduction. Adding a part of a series box for oxygen cycle or biogeochemical cycles would definitely improve the content given in the article.

Tone
Although its tone is neutral and not biased, it is mostly comprised of the reservoirs and fluxes of oxygen mainly in the modern world. The evolution of the oxygen cycle not mentioned in the article through the history of Earth. Also, it mentions the evolution of the eukaryotic life which is unnecessary and distracting because of a lesser amount of information on the oxygen cycle in general.

Content
The article has many aspects to improve. Relevance to the topic could be better without the sections "Sulfur-oxidizing bacteria in hydrothermal vents" and "Economic importance". The topic of biologically driven sulfate reduction already gives an insight about the effects of microorganisms which makes the heading "Sulfur-oxidizing bacteria in hydrothermal vents" unnecessary. "Economic importance" also has no effect on the sulfur cycle. Maybe as an excuse for the increased anthropogenic release of sulfur but a relatively bigger section is not needed. The diagram of sulfur cycle should be replaced with a better one. Sulfur oxidation states are repeated in the following section, and it could be better if two sections are combined together.

Tone
The introduction is heavily biased with a microbial/biological focus on the article. Evolution of the sulfur cycle was overrepresented while the other sections are underrepresented like Marine sulfur cycle.

Content
The article is well designed and has relevant information to the topic. Figures are also referenced, abstract and well placed. Usage of the same reference (in the "Oceanic Ecosystem") several time might indicate the requirement of additional supports for the facts.

Tone
The tone is neutral, the organization and progression of ideas in the article is excellent.