If this world were to be destroyed, from my perspective, there is nothing of value to be lost. Once we assume the value is lost, the prerequisite is that the value must exist. However, in a world that is fullfilled of complex ecosystems of non-sentient biota, which no sentient organism will be impacted, there is no value existed at all. Because value is also a emotional existence which are generated by species, if there is no such species that can feel the world thus generate the value, there is completely no value existed.
however, one argument maybe that value can also be generated from species itself. For example, if one species are composed of organs, itself can feel the pain or pleasure. However, even though it can not have feelings, it can certainly experience the status of life or death. Therefore, it produced a value of feeling pleasure. Once the world is destroied, with the extinction of such species, there are some losted values.