If you knew nothing about this topic at the outset here are TEN facts you now know.
If you started this series with no prior knowledge of ecology or habitat classification, you have now built a foundation knowledge in how we categorise and protect the natural world.
Here are the ten fundamental "takeaways" you have learned:
Humans have replaced nature as the primary 'evolutionary force' in the valley. While deep geomorphological forces, such as the Triassic sandstone bedrock, operated over 200 million years to carve the terrain, the landscape's modern physical reality is now governed by human spatial planning, political policy, and economic choices.
We are suffering from 'shifting ecological baselines' and collective amnesia. What we perceive as a pristine pastoral landscape is actually a beautiful facade covering biological collapse. Because each generation accepts a progressively degraded environment as the new "normal", we mistake a quiet sky and manicured riverbanks for ecological health.
The natural baseline state of the valley is dense forest, not open green hills. Left to natural succession, the picturesque pastures would return to a climax state of thick woodland. Agricultural subsidies and active human intervention are required to halt this natural encroachment and keep the landscape artificially "open" to preserve traditional aesthetics.
Sidmouth's seafront survival hinges on an 'aesthetic paradox'. The town’s hospitality economy relies on its clean, historic Regency seafront. However, the hard engineering defences required to protect low-lying properties from sea overtopping—such as massive concrete splash walls—threaten to destroy the very "open sea vistas" that attract visitors in the first place.
There is an ongoing battle between legal 'preservation' and natural erosion. Under the regional Shoreline Management Plan, the town's main beachfront is designated as "Hold the Line", utilising hard engineering to secure coastal homes. However, the directly adjacent East Beach is a Site of Special Scientific Interest (SSSI), where authorities are legally mandated to allow the cliffs to crumble naturally into the sea.
Flood defence is undergoing an 'upstream shift' toward natural flood management (NFM). Triggered by severe flash floods in areas like Sidford, there is a major transition away from expensive concrete defences at the river mouth toward upstream catchment stewardship. This involves cost-effective, nature-based solutions like upstream leaky dams, leaky wetlands, and altering historic structures (like School Weir) to slow the flow of water.
The Environment Act has turned biodiversity into a formalised market mechanism. Under the 10% Biodiversity Net Gain (BNG) mandate, developers who cannot fit a 10% ecological upgrade on constrained town centre sites must buy off-site credits. This has funded a market where rural landowners are paid to convert marginal fields into "habitat banks".
Farmers are transitioning from food producers to nature custodians. As traditional acreage-based subsidies are phased out, farmers are relying on Environmental Land Management schemes (ELMs) to generate revenue. Steep, machinery-unfriendly slopes that are prone to soil runoff—historically an agricultural liability—are now highly viable candidates for environmental grants, transforming a geological disadvantage into a steady stream of "green" income.
Modern high-tech infrastructure is actively used to manage sensitive ecology. Through Farming in Protected Landscapes (FiPL) grants and Devon's Local Nature Recovery Strategy (LNRS), landowners are employing "invisible fencing" (GPS-linked collars for cattle to graze heathlands without physical fences) and mapping "ecological bottlenecks" to restore wildlife superhighways like Devon's ancient hedge banks.
A volunteer-led 'shadow government' manages the valley's ecosystems, but faces a critical succession risk. Local resident organisations—such as the Sid Vale Association and Friends of the Byes—perform extensive land stewardship in place of cash-strapped local councils, using citizen-science data as political leverage to challenge development and water utility pollution. However, because this model relies entirely on the social capital of retired professionals, it faces a massive "Sustainability Paradox" as this generation ages.