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From: "David McLean" <david_mclean@em*.ms*.co*>
To: "Kevin Rottner" <Kevin@So*.co*>
Cc: "Techdiver" <techdiver@aquanaut.com>
Subject: Re: California channel- Scripps Canyon
Date: Sat, 22 Aug 1998 21:16:57 -0700
Kevin,

Scripps canyon sits north of Scripps pier. A sandy bottom at 60 -90' drops
away suddenly with overhangs, finger canyons, chutes, small mudstone caves
and incredible flora and fauna. cabling and instrumentation from past
Scripps Institute of Oceanography experiments can be found draping down the
walls.  A buoy marks the canyon attached to strain gauge cable just back
from the lip and a chute that I haven't seen the bottom of...

The canyon is recommended as a boat dive - and always as a boat dive with
technical gear.

UCSD dive club shore dives the canyon most Wednesday and Thursday evenings.
Access is typically by keyed entry to the private university access road to
the beach. There is a nice walk down the (used to be) nude beach and a 1000
yard kick out. Plus surf. This is one of the best dives on the California
coast.

Note on other posts - I have over 400 dives in Scripps canyon since 1976 and
I have yet to see a White shark or any other very large aggressive shark in
the area. White shark have been caught within a mile of the canyon, but we
have fifteen to forty divers in the water any given week and the Whites are
either shy, deep, or someplace else.  I HAVE seen whales up close, barn door
Halibut, a Cortez Angel, a ten pound lobster, unidentified Nudibranchs, and
a bunch of other things.  Put this one on your list to dive.

David McLean
Product Manager
SCUBAPRO

Yes - we DO dive at SCUBAPRO!





Nice shot looking over Scripps pier to La Jolla shores and canyon -this is a
live web cam - if there isn't a picture it is because it is night. Scripps
canyon would be looking 180 degrees the other way, but it gives an idea of
swell conditions for the beach dive.
http://sio.ucsd.edu/piershot.html

Excerpted from email from UCSD dive club repeater - data collected to 700
meters should make anyone happy....;

/////////////////////////////////////
Macrofaunal communities within and adjacent to a detritus-rich submarine
canyon system. Vetter, Eric W. and Dayton, Paul K.  Deep-Sea Research II
45(1-3):25-54, 1998

Macrofaunal abundance, biomass, diversity and species assemblages within
Scripps and La Jolla submarine canyons are compared with those on the
nearby continental shelf and slope.  Within the canyons, organic enrichment
by macrophyte detritus was evident from canyon heads down to 550 meters,
and evidence of strong currents (coarse sediment) was found down to 700
meters.  Infaunal density and biomass were higher in the canyons than
outside at all depths where comparative data were available.  Infaunal
assemblages in canyons were distinct from those at reference stations.
Both the canyon and non-canyon samples showed community differentiation
with depth. Species diversity was generally high, but decreased with depth
outside of canyons and increased with depth within the canyons.  Low
diversity at shallow depths within the canyon is attributed to a
combination of organic enrichment and physical disturbance.  Submarine
canyons are commonly found to contain distinct species assemblages or
higher faunal densities and/or biomass than nearby non-canyon regions at
similar depths.  Canyons are regular features along most ocean margins and
appear to be important as sites of enhanced secondary production, provide
diverse habitats, and act as conduits of coastal detritus to the deep sea.


=============================================================
Peter Brueggeman, Scripps Institution of Oceanography Library
UCSD, 9500 Gilman Dr, Dept 0219, San Diego CA 92093-0219 USA
.....pbrueggeman@uc*.ed*.......ht*://library-pc5969.ucsd.edu/




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