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Impact of Epiphytes on Seagrass Health in California Estuaries

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by Maya Bruguera on 5 June 2014

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Transcript of Impact of Epiphytes on Seagrass Health in California Estuaries

Impact of Epiphytes on Seagrass Health in California Estuaries
What is
Seagrass?

Thank you for listening!

California
Seagrass
Genus
Zostera
Estuaries
Why is Seagrass Important?
California Aquaculture
Study Area:
California Estuaries
Humboldt
Bay
Bodega
Bay
Newport
Bay
Bodega Bay
Newport Bay
$19,000/ha/yr
Results
Seagrass
at Risk
Epiphyte
Bloom
Seagrass Light Limitation
Epiphyte: An organism growing on another organism
Nutrient
Input
Seagrass
Death
Research Question
What is the relationship between
epiphyte
load and
seagrass health
as indicated by seagrass shoot density and blade area in
California estuaries?
Humboldt
Bay
Collection
Framework
estuary
site 1
site 2
transects
(1) shallow
(2) medium
(3) deep
1 2 3 456 7 89 10
Samples
Collected
quadrats
A special thank you to Dr. Peggy Fong, Sarah Bittick, Jay Harvey,
Andrea Maben, and
the UCLA IoES
Implications
&
Future Directions
Data
Collection

Analysis & Conclusions
Epiphytes
and Seagrass Health
No Relationship Found
Epiphyte Load
and Depth
Inverse Pattern
Found
Shoot Density Variation with Depth
No Pattern Found
No Pattern Found
Max R-squared: 0.005
Max R-squared: 0.001
California estuary seagrasses
do not exhibit the typical inverse relationship
between
epiphyte load and seagrass health
found in most seagrass habitats
Seagrass Area Variation with Depth
Potential Explanations
Macrotidal system
Dredging
It already happened!
Seagrass transplant
to assess epiphyte impact on seagrass health
Maya Bruguera
Advisor: Dr. Peggy Fong and Sarah Bittick
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