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:

"Dimethyl sulfide (DMS) is a gas produced by bacteria and algae that gives the ocean its distinctive scent. It also plays an important role in cloud formation, leading scientists to think its production may be instrumental in regulating climate change. But sea ice melt in the polar oceans under global warming has led to a reduction in DMS production, which may further intensify climate warming. To gain a better understanding of how bacteria contribute to DMS production, scientists recently investigated the distribution of bacterial genes involved in DMS cycling in seawater samples collected from around the world. They found evidence that intense DMS cycling facilitated predominantly by Alphaproteobacteria and Gammaproteobacteria occurs in the Arctic and Antarctic oceans, with high involvement of the enzymes DMSP demethylase, DMSP lyases, and trimethylamine monooxygenase..."

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

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:

"Glaciers and ice sheets may seem dead and empty to the naked eye, but the dust that coats them, cryoconite, is a hotspot for microbes and microbe-driven biogeochemical cycling. However, little is known about the geographical diversity in cryoconite microbial communities. Most cryoconite research focuses on polar microbial communities, and reports on Asia’s high mountain glaciers are rare. A recent metagenomics study found key metabolic and light harvesting differences between polar and Asian alpine cryoconite microbiota. The Asian cryoconite community had more abundant genes for denitrification, suggesting that denitrification is enhanced there compared to polar regions. While Asian cryoconite is dominated by multiple cyanobacterial lineages that possess phycoerythrin, a green-light harvesting protein, polar cryoconite is dominated by a single cyanobacterial species (_Phormidesmis priestleyi_) that lacks phycoerythrin..."

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

GEO 131: Introduction to Physical Geography is an OER course that provides a comprehensive overview of Earth's natural systems and the forces that shape its physical landscape. Students will explore key topics such as weather, climate, hydrology, ecology, geology, and tectonics. Through both lectures and hands-on lab exercises, students will examine the processes of volcanism, erosion, soil formation, and glaciation, and learn to apply geographic theories to real-world issues. The course emphasizes understanding the distribution of natural features and the scientific principles that explain Earth's physical geography.