Plant
Smooth cordgrass
Sporobolus alterniflorus
Also known as: saltmarsh cordgrass, Spartina alterniflora
The defining grass of Atlantic-coast salt marshes — and the foundation species of every salt-marsh ecosystem on Staten Island. *Spartina* (recent taxonomic revision: *Sporobolus*) tolerates daily tidal saltwater inundation and builds the marsh substrate that supports terrapins, ribbed mussels, fiddler crabs, oystercatchers, herons, and ultimately the harbor's recovering fish populations. Without smooth cordgrass, there is no salt marsh.
Scientific
Sporobolus alterniflorus (formerly Spartina alterniflora) is a perennial grass that tolerates regular saltwater immersion — its roots filter salt, its aerenchyma transports oxygen to roots in anaerobic mud, its growth-form binds soft sediment into firm marsh substrate. Two distinct growth-forms: tall (5–8 ft) along creek banks where flushing is best, short (1–2 ft) on the marsh platform. Both reproduce vegetatively (rhizomes) and by seed.
Salt-marsh cordgrass is recognized as one of the highest primary-productivity ecosystems on Earth — productivity per acre rivaling tropical rainforest. The marsh exports detritus and nutrients to adjacent estuarine waters, supporting the entire estuarine food web up to top predators.
On Staten Island
The borough’s remaining salt marshes — Lemon Creek, edges of [[mount-loretto-unique-area|Mount Loretto]], harbor tidal flats — are Spartina marshes. Marsh acreage on the borough is significantly reduced from pre-colonial levels (filling, ditching, development), but the remaining fragments are crucial habitat. Sea-level rise is the principal long-term threat to these marshes; whether they can migrate inland depends on whether adjacent uplands are protected.
See also
Auto-generated from this entry’s typed relations: frontmatter, grouped by relation type so the editorial signal isn’t flattened.
- Substrate of: [[new-york-harbor-estuary]] · [[diamondback-terrapin]] · [[great-blue-heron]]
- Member of: [[plants]]
- Contained by: [[staten-island]]
Sources
- [[beacon-ny|New York]]/New Jersey Harbor Estuary Program salt-marsh documentation
- USDA NRCS Plant Database: smooth cordgrass
- Long-term salt-marsh ecology literature (Odum, Mitsch)
Rooted in life.
What links here, and how
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Scientific
substrate of
- Atlantic marsh fiddler crab fiddler crab burrowing aerates marsh substrate, increasing Spartina productivity; another mutualism with the marsh foundation species
- Mummichog mummichogs are the principal small-fish trophic substrate of Spartina marshes — prey for herons, egrets, ospreys, larger fish
- Ribbed mussel ribbed mussels and Spartina have a documented mutualism — mussel pseudofeces fertilize cordgrass; cordgrass roots stabilize mussel beds
- Sea lavender co-occurs with cordgrass and saltmarsh hay in healthy salt-marsh communities; an indicator of intact upper-marsh substrate
counterpart to
- Japanese knotweed Japanese knotweed and other invasive plants disrupt riparian and wetland communities — degrading the substrate that natives like cordgrass and willows depend on
- Saltmarsh hay the borough's two foundation salt-marsh grasses — smooth cordgrass in the daily-flooded low marsh, saltmarsh hay in the spring-tide-flooded high marsh
6 inbound links · 5 outbound