Some philosophers believe that things only have value insofar that we project value onto them. If there are no humans to value the world around us, the world around us has no value in itself. Value exists only in our minds. Thus, put a little more bluntly, there is nothing inherently wrong about the destruction of complex natural systems around us, the man-made sixth mass extinction of our planet. It is only bad because we (some of us) think it to be bad.
I would argue that all living systems in and of themselves have value and this value is as much part of our world as matter and energy - it is information.
For a long time, there was only dead matter. Then, 4 billion years ago, matter came to life. Complex physical constructs obtained the capacity to replicate and multiply. Today, we clearly differentiate dead matter from living matter, even though it is made of the very same atoms as dead matter.
About 100,000 years ago a similarly significant transformation took place. Living matter gave birth to language, and with it ideas/metaphysical constructs emerged. Everything that makes our society - all companies, all countries, all apps, all beliefs are made of such metaphysical word-constructs.
These constructs have become so intricate that they have in and of themselves become autonomous beings - metaphysical beings. Beings which inhabit and evolve within our brain matter and replicate from one brain to another via language. We humans are the mediums of these metaphysical beings.
The building blocks for these metaphysical beings is the input of the reality around us, processed through our minds. The more complex and diverse the input from the reality around us, the more intricate the metaphysical being can become.
By destroying some part of nature (not an individual ant, cow or tree, but destroying a species, an ecosystem) we destroy one aspect of the complexity which has manifested itself through 4 billion years of evolution. We destroy information itself. And thus not only deny that information to ourselves as inputs to form ever more intricate metaphysical constructs of world, but to deny that information also to all future generations, as well as other beings which may at some point transcend the metaphysical barrier (intelligent ‚machines‘).
Thus, all living systems have value in and of themselves, independent of the (social, moral, economic, etc) value we currently project onto them. Their value is eternal. And so is their loss.