OCEANOGRAPHY & MARINE SCIENCE

An extensive series utilizing many multiple
images to present a comprehensive and
integrated approach to the total spectrum
of marine biology and oceanography. Solid
science wonderfully detailed!

BEACHES: THE LAND-WATER INTERFACE
Subject to twice daily flooding and drying and to pounding surf, the constantly shift- ing edge of the sea is uniquely demanding. 4 programs. 75 slides, detailed texts.
EP #103X SLIDES
$129.95

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SAVE $27.00 ON 4 SLIDE SET BUNDLE ORDER EP #103X.....$129.95
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BEACHES Slides order #SS-0745S.......$42.50

Details every facet of a beach, and all its influences: the general nature of the
coastline, sediments and water movements along the shore. Shows how its natural
balance of erosion and deposition is affected by transverse shifting, longshore drift, wind,
and human influences. 15 frames, cassette and guide. (Filmstrip #SS-0745F...$15.00.)

CONTENT SAMPLE: 2. Beaches exhibit certain general features that are evident
along a profile perpendicular to the shoreline, as shown in this diagram. The coastline behind a
beach is often bounded by a rather steep sea cliff or a complex series of undulating sand dunes.
The shore may be divided into a backshore and a foreshore, the beach proper.

The backshore is a terrace above the high water line that slopes gently seaward. It is
often convoluted by a series of ridges, or berms, that represent the wash limits of previous
storms.

The foreshore lies seaward of the backshore. The foreshore is the region of active beach
that lies above the lowtide line. The lower margin is periodically inundated and exposed by the
rise and fall of the tides; the upper margin is filed by the most seaward berm crest. The foreshore
is also called the beach slope or face; it inclines seaward at a steeper angle than does the
backshore.

The offshore, or submarine beach, extends from the lowtide line to the limits of
surf-induced sediment movements. The submarine beach is usually convoluted by one or more
sand bars that parallel the shoreline and alternate with deeper troughs. These long-shore ridges
may be exposed slightly during low tide.
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SEABEACHES: THEIR FORMATION AND EROSION Order #316........$42.50

Details the natural processes by which sandy beaches are built, shaped and
eroded. Special emphasis is given to the role of vegetation in beach formation, to the
effects of man's presence and interference on the beach system, and to the wisdom of
man's attempts at restoration. 20 slides and guide.

CONTENT SAMPLE: 21433 As in many other instances, man has a tremendous
impact on the beach building process as well. While healthy dune systems can withstand the
tremendous forces of nature, ironically, they are at the same time extremely sensitive to the
seemingly harmless activities of man.

Even simple foot traffic (top) from people making their way to and from the beach can
loosen sand which is held in place by plants, allowing it to blow away. Eventually, as the roots
are left exposed, these sand-anchoring plants die, leaving the dunes vulnerable to attack by
storm driven winds and seas.

This problem can be remedied by first educating people about the fragility of coastal
dunes. Simple signs in fragile areas help considerably. In addition, where possible, footbridges
(bottom) should be constructed on raised pilings over the dunes. These allow the dunes to grow
and shrink as the seasons pass, with minimal interference. In some areas narrow paths
constructed of sandbags laid into the dune have been successful in keeping people on the path
and holding destruction to a minimum.

REVIEWS "The photography...is outstanding...the graphics...give an added dimension.
The...script is well written.... Highly recommended." Previews.
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ECOLOGY OF A SANDY BEACH Order #103.........$42.50

The sandy beach is associated with sun and fun, but it is a living community,
the home of a variety of plants and animals. Set describes interaction between sand,
water and wind; the intertidal zone; and creatures washed ashore. Pictures include
beach grasses, seaweeds, goose-fish, jellyfish, man-o-war, hermit and fiddler crabs,
rockweed, mussel, horseshoe crab, moon snail, plover nest, and gull. 20 slides and
guide.

CONTENT SAMPLE: 9952 Sand is not all there is to the beach. With the sand are
shells and rocks. The rocks on a beach are usually smooth and rounded from being washed and
tumbled and rubbed against each other by the action of waves and currents. Day after day the
tide goes in and out, the waves and their foam mount the beach and withdraw. This constantly
agitates and grinds down larger particles into more sand. An example of this action can be seen
where a bottle or piece of glass has been washed and tumbled too. It is worn down, the edges
are rounded, and it is no longer transparent, but looks frosted where wind and water have driven
particles of sand against it with enough force to cause pitting and etching.

REVIEWS: "We have recently purchased...three sets of slides relating to shore
subjects. They are absolutely perfect for our needs...Their clarity and accurate coloring are truly
outstanding. I hope that future budgets will permit us...more of your materials." D.L.L.
Williamstown, Mass.
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THE ROCKY SHORE BIOME Order #102..........$42.50

Illustrates the various forms of plant and animal life found on the rocky sea
shore, within the littoral zone, and in the sea itself. Greatest emphasis is given to
intertidal organisms: the special morphological and behavioral adaptations of animals for
life in a harsh and constantly varying environment, and the narrow niches of those highly
adapted plants dependent upon varying amounts of exposure to the salty sea air for
efficient growth. Included are sea lion, killer whale, barnacles, periwinkle snails, several
species of brown and red algae, sea urchins and starfish, limpet, sea anemone, hermit
crab, seaside plants, pelagic birds, and more. 20 slides and detailed guide.

CONTENT SAMPLE: 27187 This resident of the Pacific coast intertidal zone is a
keyhole limpet (Diodora). It has a simple cap-like shell, grayish in color, which is partially
covered by a black mantle. The central opening in the shell, the keyhole, is used by the animal
in respiration--water flowing over the animal’s internal gills escapes through the keyhole.

Like the periwinkle snails we saw earlier, limpets also belong to the class of animals
known as gastropod molluscs. Indeed, the gastropods, consisting of about 35,000 species of
snails, slugs, limpets and whelks, form the largest class within the phylum Mollusca.

Limpets are particularly adapted for life in a rocky, intertidal area. They literally scour
out a snug fitting niche in the rock in which to live. If startled, they cling so tightly to their
niche that they cannot be pried loose without breaking the shell.

Limpets remain in their niche until the tide comes in, then they proceed to scour nearby
rocks for food. Like periwinkles, they feed on algae which they scrape from the rocks with their
radulae. When the tide ebbs, the limpets return to their own personal niches.

REVIEWS: "...an extremely valuable resource for undergraduate instruction. The quality
of the photographs and accompanying text is outstanding." S.K. Dept. Biology, Hamline Univ.

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RELATED PROGRAMS WORTH NOTING
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SAND DUNE ECOLOGY AND FORMATION Video order #FV1020V...............$79.95

The extensive sand dune system of the Oregon Coast. Concentrating on the
dune area covering 45% of the Oregon coast, this program outlines the fascinating and
arduous process of dune formation, where the sand comes from and how it is continually
moved and shaped, then details the many plants, trees, animals, insects and birds that
colonize these dunes and others throughout North America. Video or 2 filmstrips &
cassettes, detailed guide. (Filmstrips order FS-1020F.........$59.95)

CONTENT SAMPLE:

6. Sand dunes are found throughout the world. The most famous are in Africa, along the
coasts of Chile, France, Belgium and the Netherlands, and in Australia, the Middle East and
India. The largest sand area is the Sahara Desert, which covers 3.5 million square miles.

7. Some are far from the sea. In North America alone, Colorado's Great Sand Dunes
National Monument (left) and Death valley in California (right) have extensive inland dune areas.
There are also significant dune systems in Wyoming, New Mexico, Michigan, Indiana and
Nebraska.

8. The Atlantic Coast of the U.S. has numerous dune complexes formed by glacial
deposits, such as these on the Cape Cod National Seashore, at left, and Long Island's famous
Jones Beach, on the right. The tallest dunes on the East Coast reach 150 ft. on the North
Carolina Outer Banks.

REVIEWS: “...provides an interesting and complete perspective...does much to
dismiss the attitude that dunes are just useless mountains of blowing sand. Recommended.”
Science Books and Films.
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PRIMARY ECOLOGICAL SUCCESSION Slides order #SS-1080.....$99.95

An illustrated explanation of basic concepts of primary succession: the pioneer
community; tolerant vs. intolerant species; stabilization; stratification and the climax
community. Concise overview followed by classic, specific examples of succession--on
bare rock, on the sand dunes of Lake Michigan, on the outer banks of North Carolina--all
explored in detail. 72 frames, cassette and guide. Video, slides or filmstrip. (Video order
#SS-1080V.....$79.95; filmstrip order #SS-1080F....$44.95)

CONTENT SAMPLE:

13. Succession is the gradual and continuous replacement of plant and animal species
by other species until eventually the community, as a whole, is replaced by another type of com-
munity. It is a gradual change, and it is the organisms present which bring about this change.

14. When the process of succession begins on a site not previously occupied by other
communities, it is called primary succession. Newly formed sand dunes and bare rock surfaces
are examples of such sites.
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~0263-030~ Moon snail. photo by Charles R. Belinky, Ph.D.

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