Conservation triage: choosing what to save

Conservation has a budget, and it's far smaller than the problem. That simple fact leads to one of the most uncomfortable questions in the field: if you can't save everything, should you decide, deliberately and in advance, what to let go? The word borrowed for this is triage, and the argument over it cuts to what conservation is for.

The idea, borrowed from medicine

Triage comes from battlefield medicine. When casualties outnumber the doctors who can treat them, you sort patients into three groups: those who'll survive without immediate help, those who'll die whatever you do, and those for whom your limited effort makes the difference. You concentrate on the third group. Spending scarce effort on the unsavable means the savable die waiting.

Applied to conservation, the logic is the same and just as cold. With limited money, you'd assess each threatened species by three things: how likely it is to survive with help, how likely to be lost without it, and how much saving it costs. Then you'd direct resources where they do the most good — and, by implication, withhold them from species judged too far gone or too expensive to save.

The case for saying it out loud

Supporters of triage argue that it's already happening — it just isn't admitted. Every funding decision is implicitly a choice not to fund something else. Money poured into a charismatic species that's probably doomed is money not spent on several others that could have been saved. Pretending otherwise, they say, doesn't avoid the choice; it just makes it badly, driven by emotion and publicity rather than evidence.

Making triage explicit, in this view, is simply being honest about a constraint that exists whether or not anyone acknowledges it — and being honest lets you at least make the trade-offs rationally, saving more species overall with the same money.

The case against

Opponents push back hard, on several grounds. Declaring a species unsavable can become self-fulfilling: withdraw effort and funding, and you guarantee the outcome you predicted. Our predictions are also uncertain — species written off have recovered, and confident judgements about what's doomed have been wrong before.

There's a deeper objection too. Triage treats conservation as an optimisation problem with a fixed budget, but the budget isn't fixed — it's a political choice. Accepting scarcity as a given, critics argue, quietly concedes the real fight, which is over how much society is willing to spend at all. Better to insist that more is possible than to start dividing up too little.

An unresolved tension

There's no clean resolution, because the disagreement isn't really about method — it's about what conservation is trying to be. Is it a practical enterprise that must live within its means and maximise returns, or a moral commitment that shouldn't put a price on which species deserve to exist?

Both positions are serious, and most people in the field feel the pull of each. The honest position is probably that triage describes a real and unavoidable constraint, and that treating it as a comfortable answer rather than a painful last resort is where it goes wrong. The value in the debate isn't a formula for who to abandon. It's the pressure it puts on the prior question — why the budget is so small in the first place, and whether that, rather than the list of species, is the thing that ought to change.

Sources and further reading

• Bottrill, M.C. et al. (2008). Is conservation triage just smart decision making? Trends in Ecology & Evolution 23(12): 649–654 — the case that triage is simply efficient allocation of scarce resources.
• Jachowski, D.S. & Kesler, D.C. (2009). Allowing extinction: are we ready to let species go? Trends in Ecology & Evolution 24(4): 180 — a direct reply arguing resources are not as fixed as triage assumes.