Recent advances in metagenomics revealed enormous diversity of previously unknown, uncultured microorganisms that predominate in the ocean, soil, deep subsurface, human body, and other environments [2], [4], [5], [6].
The surface reflectance of each surface pixel was calculated as a linear combination of five surface types (ocean, soil, snow, forest, and grassland).
Advances in biotechnology have changed the manner of characterizing large populations of microbial communities that are ubiquitous across several environments".Metagenome" sequencing involves decoding the DNA of organisms co-existing within ecosystems ranging from ocean, soil and human body.
Interest in understanding the microbial make-up of diverse environments (e.g., ocean, soil, sediment, and a range of animal and plant 'hosts') combined with the development of ultra-high throughput sequence methodologies sparked a second revolution: the explosion of metagenomic studies sequencing the DNA of an entire community of organisms.
The sources of the materials in rainwater are the oceans, soils, fertilizers, air pollution, and fossil fuel combustion.
Our collective health, wealth and well-being depends on how we husband the earth's "natural capital" — the air, rivers and oceans, soils and forests, its full diversity of flora and fauna.
In recent decades, interest in natural systems, such as oceans, soils, and the biosphere, has been increasing considerably, and in the associated scientific research areas (e.g., biogeochemistry and soil science) significant challenges are encountered due to the complexity of the factors related to these systems [1, 2].
Data from the last time Earth experienced a large, abrupt climate warming, around 20,000 years ago, indicate that a slight change in Earth's orbit caused an initial warming that then caused either oceans, soils, or both to release carbon dioxide and methane, both greenhouse gases, into the atmosphere.
Oceans, soils, and forests are examples of reservoirs of carbon.
Will scientists of 2045 look back at the results of microbial community composition in oceans, soils and other environments collected in 2015 to draw meaningful conclusions about ongoing alterations?
In summary, we would argue that there is no greater challenge to exploring the ecology and evolution of viral communities in diverse ecosystems (e.g., oceans, soils, humans) than the lack of reference genomes that cause dominance by 'viral dark matter'.
