Methodology is available from: J. Emmett Duffy, et al. Biodiversity mediates top-down control in eelgrass ecosystems: A global comparative-experimental approach. Ecology Letters 18:7 (696–705). DOI: 10.1111/ele.12448.

Table S1. Codes and locations of sites

Code	Site	Latitude	Longitude	Principal Investigator
AK	Kachemak Bay, Alaska, USA	59.648	-151.436	Iken
BB	Bodega Bay, California, USA	38.317	-123.033	Stachowicz
BC	Vancouver, British Columbia, Canada	49.000	-123.100	O'Connor
FI	Ängsö Island, Finland	60.100	21.700	Boström
JN	Akkeshi-Ko Estuary, Hokkaido, Japan	43.060	144.911	Nakaoka
JS	Akiwan Bay, Hiroshima, Japan	34.178	132.550	Hori
MA	Nahant, Massachusetts, USA	42.426	-70.919	Douglass
NC	Beaufort, North Carolina, USA	34.683	-76.600	Reynolds, Sotka
NN	Misvaerfjord, Bodø, Norway	67.233	15.200	Olsen, Eriksson, Horeau
PO	Ria Formosa Lagoon, Portugal	36.997	-7.829	Engelen
QU	Pointe-Lebel, Quebec, Canada	49.113	68.179	Cusson
SD	San Diego Bay, CA, USA	32.714	-117.226	Hovel
SW	Gullmar Fjord, Sweden	58.314	11.548	Moksnes/Fredriksen
VA	Goodwin Islands, Gloucester Point, Virginia	37.217	-76.383	Duffy/Reynolds
WA	Willapa Bay, Washington, USA	46.500	-124.000	Ruesink