Can nature heal itself?

Recovery also depends on its speed and on what can still reach the site

Question: Can nature heal itself?
Position‹3 of 3: It depends, nature can sometimes heal itself
Argument‹2 of 2: Recovery also depends on its speed and on what can still reach the site

The argument

A second argument offered for this position identifies two variables that decide cases the first leaves open. The first is rate. Proponents argue that a capacity exercised too slowly is not the same as a capacity, at least for any purpose the question is being asked for. A woodland that reassembles over centuries is genuinely recovering, and if the species which depended on it will be gone within decades then the recovery and the loss are not in the same conversation. Whether nature heals itself therefore depends in part on the horizon against which healing is being measured. The second is connectivity. Proponents point out that every recovery by colonisation requires somewhere to colonise from. The same damage, inflicted on a site with intact habitat along its boundary, is repaired within a few seasons by organisms moving in from next door. Inflicted in the middle of a landscape where nothing of the kind remains within reach, it is not repaired at all, because the recolonisers do not exist in the neighbourhood. Proponents stress that this is why identical treatments produce opposite outcomes, and why arguments about whether nature recovers so often talk past each other, since the answer is a property of the surroundings as much as of the damage. Holders of the view argue that this makes intervention a targeted question rather than a general one. If what limits recovery is the absence of a source, the intervention that matters is reconnecting habitat or introducing what cannot arrive by itself. If it is a self maintaining feedback, the intervention is breaking it. If nothing limits recovery but time, the intervention is to stop interfering and wait. Proponents conclude that nature heals itself where its mechanisms have something to work with, that it does not where they do not, and that identifying which case applies is more useful than a general answer either way.

Premises

[P1]A recovery occurring over centuries does not prevent losses that will occur within decades, so whether a capacity counts depends on the horizon against which it is measured. [P2] Recovery by colonisation requires surviving populations within dispersal range, so identical damage is repaired quickly in a connected landscape and not at all in an isolated one. [P3] What limits recovery therefore varies by case, between the absence of a source, a self maintaining feedback, and simply time. [C] Nature heals itself where its mechanisms have something to work with and does not where they do not, so the answer depends on identifying the limiting factor in each case.

Counter-arguments

Opponents on both sides argue that the position concedes their point while declining to state it. If recovery over centuries does not count, then for every practical purpose nature cannot heal itself, and the position has agreed with the negative answer while presenting itself as a middle way. If the mechanisms work wherever a source remains, then nature can heal itself and the qualifications are details. Critics also note that the framework asks for information rarely available, since the limiting factor at a given site is usually identified after an intervention has succeeded or failed rather than before, which limits its value as guidance.

Rejecting the premises

[Rejecting P1] Judging a capacity by a human horizon builds the answer into the measure, since a process can be real and effective on its own timescale regardless of what people need from it. [Rejecting C] The limiting factor at a site is usually identified only after an intervention has succeeded or failed, so the conclusion asks for information rarely available in advance.