Table 1 Rates of anaerobic ammonium oxidation (anammox) and associated contribution to nitrogen removal in China’s coastal wetlands and other estuarine and coastal ecosystems.

Locations	Rates (μmol N m⁻² h⁻¹)	Contributions (%)	Refs
New River Estuary	0.3–50.8^a	<14	19
Seine Estuary	11.8–24.9^a	3–8	20
Rander Fjord	19–55	5–24	23
Norsminder Fjord	19–55	5–24	23
Thames Estuary	2.2–200	0.5–8	25
Cape Fear River Estuary	1.5–14.8^a	3.8–14.6	31
Southeast coast of Queensland	0–84	0–9	34
West and south coast of Greenland	1–92	1–35	42
Gulf of Finland	10–30	10–15	43
Chesapeake Bay	0–1.6	0–22	44
Colne Estuary	0–157	<30	45
Plum Island Sound Estuary	2.9	<3	46
St. Lawrence Estuary	5.5	3	47
Providence River Estuary	0–16	0–4	48
Little Lagoon	0.2–0.5	2–4	49
China’s Coastal wetlands	2.0–11.4^a	3.8–10.7	This study

^aThe unit is changed from μmol N g⁻¹ h⁻¹ to μmol N m⁻² h⁻¹, assuming dry sediment bulk density of 1.88 g cm⁻³.

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