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NorthCoast's Regional Information
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NATURESea, land, river PEOPLESCommunity
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3 Sections
marked with dotted lines – 1 & 2 are easily seen raised structures –
useful for orientation |
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Upon Inspection obvious that sunny south side differed from shady
north side of structure Most apparent in upper section where Prasiola dominates one side and opposite
side sterile Mid section is transition area Lower section poses most interesting part – Is it sunny vs
shady? Or just chance disturbance that created/ maintains difference? |
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Most obvious
differences seen here Green algae
is Prasiola See this page for more discussion |
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Mid
section interesting |
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I
have not worked this area up adequately – only a page emphasizing animal life
found – presumably area between 12& 15 is where tidal height becomes most
significant – as both sides apparently similar |
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Why does ‘Lower
Section’ South side differ from North Side |
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2
hypothesis – south side has been scraped clean by a recent disturbance – and
will ‘soon’ look like North side Hypothesis
I favour is that disturbance event may have been years ago – and because of strong
sunlight the Semibalanus will not be able to re-establish – and it is needed
to create the habitat for Fucus etc |
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Seepage N&S
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Seepage from above seems to argue
that South side is too hot – because in seepage area there is > Fucus etc
present on South side than in non seepage areas I
attempted to monitor South
side – but inverts (most only a few months to weeks old) are too small to
ID --- will repeat later in summer |
Created by LG on 11/5/2007
Last updated on Friday, May 11, 2007