--- title: what ecosystem valuation counts canonical_url: https://ensurance.app/guide/what-ecosystem-valuation-counts markdown_url: https://ensurance.app/guide/what-ecosystem-valuation-counts.md subtitle: "fifteen stocks, nineteen flows, and the condition they are in" category: esv --- # what ecosystem valuation counts *fifteen stocks, nineteen flows, and the condition they are in* Ecosystem valuation puts a yearly number on the work a piece of land already does: the water it holds and cleans, the soil it keeps in place, the habitat it carries, the flood it slows before the road downstream. It counts the living systems on the ground, what they produce each year, and the condition they are in. It does not count what a buyer would pay for the deed. That is the whole difference. A [real estate appraisal](/guide/what-a-real-estate-appraisal-prices?from=guide) prices a sale. An ecosystem valuation prices work. Same parcel, two questions, and the second one usually goes unasked. This post answers the second question in plain terms: what gets counted, why condition changes the count, and who you hire to run it on your land. ## what ecosystem valuation is **Ecosystem valuation** is an estimate, in money per year, of the benefits the ecosystems on a defined area provide to people. Those benefits are **ecosystem services**. Economists have estimated them for decades, and in March 2021 the UN Statistical Commission adopted SEEA Ecosystem Accounting — the physical accounts as a statistical standard, the monetary chapters as recommendations — so countries could keep ecosystem accounts beside their economic accounts. A parcel valuation uses the same logic at the scale of one property. It asks three questions, in order: 1. **What is standing here?** The ecosystem types on the parcel, and how many acres of each. These are the **stocks**. 2. **What work do they do?** The services each stock provides in a year. These are the **flows**. 3. **How well are they doing it?** The **condition** of each stock today, read against a healthy version of the same system. Stocks are the inventory. Flows are the annual work. Condition is the honest adjustment between the two. :::stat 15 | ecosystem stocks 19 | ecosystem service flows 1 | condition reading per stock, per parcel | accent ::: ## the fifteen stocks The fifteen types are built to cover any ground you could hold, from a town lot to open water: **Marine systems · temperate forest · tropical forest · boreal forest · grasslands · shrublands · coastal systems · rivers and lakes · inland wetlands · polar and alpine · desert · cultivated and developed · urban open space · rural open space · subterranean** Two of these surprise people. **Subterranean** is the one most often forgotten. An aquifer under a hayfield is a stock. It stores water whether or not anything on the surface looks wild. **Cultivated and developed** is the other. An orchard, a working farm, a town lot with mature trees: these are stocks too. Ecosystem valuation does not only count wilderness. It counts what is actually there. A single parcel usually holds only a few of the fifteen. Each type has its own entry in [the 15 ecosystem types](/guide/15-ecosystem-types-natural-capital-stocks?from=guide). ## the nineteen flows **Climate stability · clean water · clean air · pollination · erosion control · food · water abundance · risk and resilience · habitat · recreation · aesthetic and sensory experience · raw materials · energy · medicinal and genetic resources · research and learning · art and inspiration · existence and legacy · pest and disease control · healthy soils** A few are familiar line items: food, raw materials, energy. Most are not on any statement you have seen. **Clean water** is the filtering a wetland does before water reaches a well or an intake. **Risk and resilience** is the floodwater a floodplain absorbs so the bridge below it holds. **Existence and legacy** is the value people hold for a place continuing, whether or not they ever visit it. Each flow is described in [the 19 ecosystem services](/guide/19-ecosystem-services-natural-capital-flows?from=guide). Fifteen stocks by nineteen flows is a grid of 285 cells. No parcel fills it. Ground with a creek, a wet meadow, and a dry upland bench carries three stocks and only the flows those three actually perform. A careful valuation leaves the other cells empty rather than padding the total. ## how the number is built The arithmetic is plainer than people expect. In words: 1. Start with the acres of each stock on the parcel. 2. For each flow that stock performs, take a published per-area ecosystem-service value, stated here per acre per year. The studies themselves are often per hectare. These values come from peer-reviewed studies, gathered in open sources such as the Ecosystem Services Valuation Database and global syntheses like de Groot and colleagues (2012). 3. Adjust each value by the condition of that stock on this parcel. 4. Add the flows. The total is the year's living work, stated in dollars per year. Transferred values carry error from the study site to this parcel, and summing flows can count one benefit twice — clean water and water abundance, habitat and existence. The account lists each value and its source line by line so you can check it. None of this requires a new economic study of your land. The per-acre values come from studies of similar systems elsewhere, a method [what environmental valuation is](/guide/what-environmental-valuation-is?from=guide) covers in more depth. What is specific to your parcel is the map of stocks and, above all, the condition. Our engine for this is **RealValue**. We have run it on real parcels since about 2022. It does one job: turn the stocks, flows, and condition of a named parcel into an account that an owner, a family, or a board can read and check. ## why condition matters more than area Picture two neighboring parcels with the same acreage mapped as inland wetland. On the first, old ditches were filled years ago. Water spreads across the meadow each spring, sedges hold the banks, and the ground stays wet into summer. On the second, a drainage ditch runs straight through. The water table has dropped, the meadow is mostly pasture grass, and it floods only in a bad year. A land-cover map labels both "inland wetland." The appraisal may separate them for the sale — the drained parcel can price higher as buildable ground. An ecosystem valuation separates them for the work. The first parcel slows floodwater, filters runoff, recharges groundwater, and carries habitat. The second does a fraction of that work. Same stock, same acres, very different flows. That is why condition sits inside the arithmetic, not in a footnote. Area tells you what kind of system is there. Condition tells you how much of its work it is doing. A valuation that counts acres alone overstates degraded ground and understates ground someone has cared for. Condition is read from evidence: vegetation cover, how connected the water is, soil, invasive species, fragmentation. SEEA treats condition as its own account for the same reason. And condition moves. Fill the ditch, let the water spread again, and the condition reading rises. The account shows which acres do the most work and where repair would add the most. :::johnson **a map counts acres. a valuation counts the work.** Condition is the difference, and only the parcel can tell you what it is. [see the valuation service →](/services?from=guide#finance) ::: ## what ecosystem valuation does not count | counts | does not count | |---|---| | The living systems on the parcel, by type and acre | The deed, the buildings, the comparable sales | | The work those systems do in a year | The cash a lease or a crop brings in this year | | The condition of each system today | The zoning, or the use that pays the most for the deed | | Values drawn from published studies, shown line by line | A price a buyer has agreed to pay | The appraisal is doing its job, and the job is the sale. [Nature-blind appraisal](/guide/nature-blind-appraisal?from=guide) covers what that leaves out. Ecosystem valuation is the other account, and it is the one this post is about. ## who you hire to value an ecosystem on your land You hire someone who will map the stocks on your parcel, read their condition, and apply published service values with the work shown. That is the service we offer: **natural capital valuation**, with the **ecosystem service accounting** that sits inside it. Both are listed on [our services page](/services?from=guide#finance). The unit is one parcel. The hire returns one parcel account with four readings: | reading | what it tells you | |---|---| | Stocks | Which living systems stand on the parcel, and in what condition | | Flows | The work those systems do in a year | | Natural cap rate | That year's work set beside the cost of protecting the parcel — not a cap rate on the sale price | | Value gap | A year of living work the sale price does not carry | How those four fit together is the subject of [how ecosystem services get a number](/guide/how-ecosystem-services-get-a-number?from=guide). Be clear on what the account is not. We are not a state-licensed appraisal shop. A mortgage, a conservation easement deduction, or a court still needs the appraiser the rule names. Our account sits beside that file. It does not replace it, and it does not replace the county assessor. The wetland, the meadow, and the aquifer on a parcel exist whether or not an appraiser books them and whether or not anyone buys a certificate. Ensurance funds that living condition. A valuation is how that condition becomes a number you can hire. The number is not the worth; [a valuation is not the worth](/guide/a-valuation-is-not-the-worth?from=guide) says why. If you later fund that condition through [*ensurance*](/specific?from=guide), the instrument is a certificate: money tied to keeping the condition, not the valuation itself. Who hires it: - **A landowner** who holds the deed and has an appraisal, or is about to order one, and wants the living work on the same parcel written down. [Natural capital valuation for landowners →](/solutions/landowners?from=guide&topic=nature-valuation) - **An investor** who holds land, or is weighing a parcel, and needs the same account beside the underwriting file. [Valuation for investors →](/solutions/investors?from=guide&topic=nature-valuation) - **A foundation** that funds a place and wants to see the work it is paying to keep. Name the parcel through the [contact page](/contact?from=guide&topic=nature-valuation). ## frequently asked questions ### what is ecosystem valuation? Ecosystem valuation is an estimate, in money per year, of the services the ecosystems on a defined area provide: clean water, flood protection, habitat, soil, pollination, and more. On a parcel, it counts the ecosystem types present, the work each does, and the condition each is in. ### what does ecosystem valuation measure? It measures annual flows, not a sale price. The reading starts with fifteen possible stocks and nineteen possible flows, applies a published value per acre per year to each flow a stock actually performs, and adjusts for condition. The output is the year's living work on that ground. ### how is condition different from area? Area says what kind of system is there and how big it is. Condition says how well it is working. Two wetlands of the same size can do very different amounts of work if one has been drained, so condition is applied inside the count, stock by stock. ### who do i hire to value an ecosystem on my land? Hire a team that maps the stocks, reads condition on the parcel, and shows which published values it used. We offer this as natural capital valuation with ecosystem service accounting, delivered as one parcel account. It sits beside your licensed appraisal; it does not replace it. ## one parcel Pick the parcel you already know best: the one with the creek, the wet corner, the hillside you have never been able to price. The appraisal has told you what it would sell for. The valuation tells you what it does. [Hire the valuation for one parcel →](/contact?from=guide&topic=nature-valuation) ## sources [UN SEEA Ecosystem Accounting](https://seea.un.org/ecosystem-accounting) — adopted by the UN Statistical Commission at its 52nd session in March 2021; ecosystem extent, condition, and service-flow accounts [Ecosystem Services Valuation Database (ESVD)](https://www.esvd.info/) — open database of published ecosystem-service value estimates, organized by ecosystem type and service [de Groot et al. (2012), "Global estimates of the value of ecosystems and their services in monetary units," Ecosystem Services](https://doi.org/10.1016/j.ecoser.2012.07.005) — per-area value estimates by biome and service, synthesized from published studies [IUCN Global Ecosystem Typology](https://global-ecosystems.org/) — a reference classification of the world's ecosystem types ## the series 1. [what a real estate appraisal prices](/guide/what-a-real-estate-appraisal-prices?from=guide) — the file prices a sale 2. **what ecosystem valuation counts** — this post 3. [what environmental valuation is](/guide/what-environmental-valuation-is?from=guide) — a method makes a number 4. [how ecosystem services get a number](/guide/how-ecosystem-services-get-a-number?from=guide) — the four readings 5. [hire a natural asset valuation](/guide/hire-a-natural-asset-valuation?from=guide) — one parcel, one account