The smell arrives before everything else — sulfur and salt and something older than both, the fermentation of grass that died in autumn and hasn’t finished dying. This is the smell of productivity. Ecologists use that word in a technical sense: a salt marsh produces more organic matter per square foot than almost anywhere else on earth, more than a cornfield, more than a tropical rainforest. What you smell is the accounting.
March has stripped the spartina to copper wire. The stalks stand above the mud, dead for five months now, but the roots hold the banks intact, and this is what spartina is actually for — not the green summer blades, not the seed heads, but the roots, a mat so dense that nothing can dislodge it, burying itself six feet deep and holding the bank against tide and storm and time. The above-ground life is almost beside the point.
At low tide you can see where the water has been. Channels cut through the mud, some of them a foot wide, some wide enough to paddle a kayak. The channels are dark, almost black, and their edges show the layering of sediment: last year’s deposition, and the year before, and before that, going back centuries to when this was open water and not yet a marsh at all. The marsh is making itself, filling itself in, one tide at a time. Given enough centuries it will become meadow, then forest, then disappear completely as a marsh. Everything here is process, not thing.
A great blue heron stands in one of the channels. It has been standing there for longer than I’ve been watching it. Its stillness is not patience — that would make it too human — but something prior to patience, something that patience is a pale copy of. The heron is a trigger waiting for a stimulus. Its neck is coiled. When the fish comes close enough, the neck will uncoil in a motion faster than intention, faster than decision. Until then: stillness.
The mud between the channels is honeycombed with holes. The fiddler crabs are still underground — too cold for them — but in another month they’ll emerge, the males carrying one claw too large to be useful, so large it has to be held out like a carried thing, and they’ll wave it at each other and at the females, who will mostly ignore them. The claw is advertisement and anchor both. You carry what you are.
There is a quality of light in late afternoon in March that doesn’t have a name. It comes through at an angle too low for summer, too high for winter, and it catches the dead spartina in a way that makes it look lit from within — copper-gold, the color of old photographs. The mud reflects it back. The water in the channels reflects it back. Everything becomes briefly the same color, the same flat radiant plane, and the marsh loses its depth and looks like a painting of itself. Then the light shifts by a few degrees and the depth returns and everything is itself again.
The tide is turning. You can’t see it yet but you can hear it — a soft invasion coming through the channel to the south, the water darkening and rising along the banks by increments too small to track directly but too large to miss if you look away and look back. In two hours the channels will be full and the mud will be covered and a snowy egret will hunt the shallows with a frantic, jerky pace entirely unlike the heron’s stillness — a different philosophy of attention.
By dark the tide will be out again. The heron will be somewhere else. The spartina will stand in the cold and continue its slow work of decay and structural holding, which are the same work, which is what being spartina is.