We describe in detail the pore water chemistry in the sediments below a white mat around a bunch of bananas at a water depth of 2,200 m in the Tenryu Submarine Canyon. We infer the metabolism of microbes in the sediments around the bananas based on the chemical and isotopic compositions of the pore water. On the basis of the relation between ammonia and total carbonate (ΣCO₂) concentrations in the pore water, we identified that an excess ΣCO₂ was distributed around the bananas that cannot be explained by the decomposition of organic matter derived from marine organisms, indicating that the bananas decomposed to generate the excess ΣCO₂. We conclude that the bananas built a local organic-rich environment, stimulating the activity of organotrophic bacteria.

We found some enterprises who could play roles in data-procession ecosystem except for data auditors and community, and for venture investors, through research of enterprises on a question “What data marketplace, whose operator aims toward financial independence, would be able to provide incentives for private sectors to participate in itself?” in order to utilize and disseminate new scientific knowledge relevant to earth-environmental information. This paper discusses a design of a data marketplace. The keystone of the design is whether 'anonymization' certification, which certifies that each data set dealt on the marketplace contains no privacy, will become recognized as de fact standard or not. Anticipated user supports are (1) protections against data theft, (2) settlement functions on matching contracts or on deals for data and relevant applications, (3) demonstration of successful examples, (4) marketing, and publicity work, for example, induction of participants' benefit.