Category: Coast

The fragility of water on earth #marineexplorer #underwatersydney

The fragility of water on earth #marineexplorer #underwatersydney by John Turnbull

Via Flickr:

If the earth was a basketball, the oceans would wrap 70% of it at about the thickness of a piece of paper. Fresh water supplies are 1/50th those of salt water, so the patch of paper representing fresh water would be just 1.5% of the surface of the earth. That’s not much water, given it keeps life on earth alive.

The fragility of water on earth #marineexplorer #underwatersydney

The fragility of water on earth #marineexplorer #underwatersydney by John Turnbull

Via Flickr:

If the earth was a basketball, the oceans would wrap 70% of it at about the thickness of a piece of paper. Fresh water supplies are 1/50th those of salt water, so the patch of paper representing fresh water would be just 1.5% of the surface of the earth. Not much, given it keeps all life on earth alive.

Bushfire sunrise over Sydney Harbour #marineexplorer

Bushfire sunrise over Sydney Harbour #marineexplorer by John Turnbull

Via Flickr:

The smoke in the air casts an orange pall over Fairlight, Sydney Harbour, on a day with 130 bushfires burning in NSW alone and the mercury at Epping currently sitting at 44C.

Urchin barren boulder field #marineexplorer #underwatersydney

Urchin barren boulder field #marineexplorer #underwatersydney by John Turnbull

Via Flickr:

This entire boulder field at Cabbage Tree Bay, Manly, may be kept devoid of kelp by long-spined (black) urchins C rodgersii. A hint to this can be found in the few boulders that do have kelp on them, low down in the shot, in the classic pattern of a kelp island on top of a largish boulder, up where the urchins can’t reach

Palm shadow on #sydneyharbour #marineexplorer

Palm shadow on #sydneyharbour #marineexplorer by John Turnbull

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Balgowlah

Modified estuary - North harbour #marineexplorer #underwatersydney

Modified estuary – North harbour #marineexplorer #underwatersydney by John Turnbull

Via Flickr:

This small bay at Fairlight illustrates the extent to which we modify estuaries – a hundred or so moorings, jetties, marinas, seawalls, shark nets, hard surfaces on land with associated runoff.

Kelp remnants in the urchin barrens #marineexplorer #underwatersydney #hiddendeserts #scicomm

Kelp remnants in the urchin barrens #marineexplorer #underwatersydney #hiddendeserts #scicomm by John Turnbull

Via Flickr:

The larger patch of kelp at top right can survive as it is on flat rock, where black urchins can’t find a crack to hide in during the day. Elsewhere in the photo the kelp has been scraped away by urchins currently hiding in the crevices – you can see some if you zoom in. The kelp “islands” on top of the boulders are just a bit too far for the urchins to travel in one night. The border around the curvy patch top left shows their nightly travel distance.

Serpulid worm #marineexplorer #underwatersydney

Serpulid worm #marineexplorer #underwatersydney by John Turnbull

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Camp Cove

Blue spotted Elysia #seaslugcensus #marineexplorer #underwatersydney

Blue spotted Elysia #seaslugcensus #marineexplorer #underwatersydney by John Turnbull

Via Flickr:

Camp Cove. See the eye? This tiny nudi is a few mm long. You can also see the algal cells in its tissues

Trachinops taeniatus - Eastern hulafish #marineexplorer #underwatersydney

Trachinops taeniatus – Eastern hulafish #marineexplorer #underwatersydney by John Turnbull

Via Flickr:

Even a tiny fish can make a scene at Fairy Bower