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Taken 13-Dec-12
Visitors 7

16 of 156 photos
Categories & Keywords

Subcategory Detail:
Keywords:New Zealand, kelp, seaweed
Photo Info

Dimensions4896 x 3264
Original file size8.39 MB
Image typeJPEG
Color spaceAdobe RGB (1998)
Date taken13-Dec-12 20:09
Date modified24-Jan-13 20:41
Shooting Conditions

Camera makeCanon
Camera modelCanon EOS-1D Mark IV
Focal length70 mm
Max lens aperturef/2.8
Exposure0.4s at f/22
FlashNot fired, compulsory mode
Exposure bias0 EV
Exposure modeManual
Exposure prog.Manual
ISO speedISO 100
Metering modePattern
Bull kelp 1

Bull kelp 1

Bull kelp is a common name for a number of species of kelp, being the dominant seaweed of exposed rocky coasts around New Zealand and the subantarctic islands. Its thick flexible stipe supports a spongy broad blade or leaf that is usually divided into long narrow straps. A a root-like structure anchors the kelp to the ocean substrate; in this case the exposed rocky coastline is battered constantly by the southern ocean.

Kelp grows in underwater "forests" in shallow oceans, and is thought to have appeared in Miocene, 23 to 5 million years ago. They require nutrient-rich water with temperatures between 6 and 14 °C and are known for their high growth rate; some species as much as half a metre growth per day to over 80 metres in length.

Bull kelp bags are still used today by South Island Māori to preserve many types of food, and to transport preserved food from one area to another.