Cover Table of Contents Introduction Background Investigation 1 Investigation 2 Glossary Teacher Resources Curriculum Evaluation Credits |
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NOAA's National Marine Sanctuaries |
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Putting monitoring research into perspective
requires understanding three important goals of the
research projects: Site
Characterization Site characterizations provide managers with
information that helps them make effective
decisions when it comes to determining human
activities in protected areas; setting agendas for
research, monitoring, education, outreach, and
enforcement programs; and using the most
appropriate methods to restore an area, should that
be necessary. Site characterizations are detailed reports that
contain information on an area's biological and
physical environments, cultural history, and human
use patterns. They chronicle the history of
discovery and use, the record of scientific
investigations, the pressures being placed on
natural and cultural resources, and the nature of
attempts to protect the resources. Properly done,
they are complete sources of current information
for an area of particular interest. When conducting site characterizations, there
are a number of ways scientists document the
presence and abundance of species relative to the
environment's physical factors. One method is
conducting vertical and horizontal transects. Vertical transects in the sea are useful to
define the ocean's layering system of physical and
biological parts. Imagine dropping a line from one
point in the water column down to another. Physical
factors are then observed and recorded at various
points along this line, or transect. Increments
along the transect are usually evenly spaced, and
when combined with similar transects in other
locations, may reveal changes taking place due to
water currents, upwelling, and other phenomena. Horizontal transects are conducted similarly.
These are most often used along the seafloor or at
a particular depth. For instance, a horizontal
transect at a depth of 600 meters might look for
distribution Given the constraints of time and money, these
techniques provide researchers with methods to
construct models of an ecosystem while only
studying small portions of it. The models help us
understand how an ecosystem functions. They may
describe the flow of energy through a system or
they may allow us to predict the effects of natural
or human-caused events on an ecosystem. Monitoring Physical factors such as temperature and
salinity measured as baseline data can form the
foundation of a monitoring program. So can the
presence or absence of a species, or age groups of
a single species or entire groups of species.
Habitats can be monitored to observe changes in
structure, such as physical disturbance. In a
monitoring project, observations are made or
samples are taken--like "snapshots" of the
habitat--on a regular basis, at various intervals
depending on the type of information needed.
Periodic reports of data compare snapshots against
each other and against the baseline data. This
information helps resource managers evaluate trends
(systematic changes over time) or perturbations
(sudden changes). Although the causes of these
changes may not be apparent as a result of
monitoring, they alert managers and suggest ways of
studying, in closer detail, the causes of
change. Geographic Information System (GIS) is a
powerful new tool that allows resource managers to
get a "visual" representation, overtime, of how
resources relate to each other, and to humans. Here
is a hypothetical example of how GIS can be
utilized. Monitoring data tell us that over the
past five years, the number of coastal recreational
areas has increased. During that same period, there
was a reduction in the number of active seabird
nesting sites. This became apparent when looking at
the same two GIS overlays in 1995 and then again in
2000. One might infer that the increased human
activity is disturbing the seabirds as they nest.
In an actual example, sanctuary researchers would
closely assess the situation, and if needed,
recommend further regulations. The first activity
in this guide will also demonstrate the power of
this new cutting edge tool known as GIS. For more
information:http://sustainableseas.noaa.gov/missions/channel2/background/gis.html |
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DeepWorker
2000 Specifications Communication systems include a
modified Imaginex sonar, which allows
standard scanning and ultra-high
resolution for short range. Ocean sounds
are recorded with a directional
hydrophone. Video cameras allow the pilot
to record the dive. VHF and thru-water
communications allow contact with surface
support personnel. Deepworker's
Tools For more information on Deepworker see:
http://sustainableseas.noaa.gov/aboutsse/technology/equipment/deepworker.html |
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2000 |
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