Life Goes On: Fishes: Survival in a Challenging Environment
Two features of water, viscosity and density, present challenges for fishes that are very different from what animals who live on land or in the air must face. Fishes have been able to meet these challenges through a number of physiological adaptati...
Subject: ocean
Transcript: , ranging up to And probably higher than 25,000 species in the world's oceans-- Including fresh water for that matter. And in those environments the diversity
Hands On: Need for More Oceanographers, The
Oceanography's rapid growth requires that sizable numbers of eager young scientists join the ranks of established veterans.
Subject: ocean
Transcript: [matsumoto:] one of the things we really want to do, Besides trying to find out as much as we can About the ocean environment is learning what's in
Living Together: Rocky Intertidal Zone, The: Challenges and Adaptations
The intertidal zone contains a rich abundance of diverse organisms, despite a multitude of challenges, from pounding waves and temperature fluctuation to competition for scarce resources. Nonetheless, many organisms manage to not only survive but to...
Subject: ocean
Life Goes On: Reptiles and Birds
While fishes are the most successful and abundant marine vertebrates, marine reptiles represent the fewest number of species and individuals. Marine birds probably evolved from reptiles and are generally considered to be among the most highly specia...
Subject: ocean
Transcript: are And dip the squid at the surface of the ocean Without landing on the ocean. They can land in some cases, But they can actually fly along the surface
Living Together: Estuaries: Productivity and Vulnerability
Estuaries and wetlands are among the most productive areas anywhere, literally teeming with life. But these environments are often threatened by nutrient discharge from agricultural or farm land, as well as the building of homes or other forms of de...
Subject: ocean
Transcript: the intersection of fresh water sources and the ocean, face some of the same problems. the consequences of this can be quite severe, because like coral
Living Together: Symbiotic Relationships
The relationship between some of the algae and animals living in a coral reef is symbiotic, meaning the two species live together. Symbiotic relationships between residents of coral reefs or other communities can be mutually beneficial, but that is ...
Subject: ocean
Food for Thought: Primary Productivity and Global Geochemical Cycles
at a broad range of microbial life forms in the ocean. As part of this process, it's become much more apparent that the oceans play an enormously
Subject: ocean
Transcript: bacteria in the ocean. We discovered that the bacteria can take Up the dissolved organic material. Now it becomes particulate organic material, because it
Living Together: Marine Communities: Change and Bio-Diversity
For communities in the marine environment, change is an ongoing reality. Bio-diversity, which refers to the number of species and relative abundance of different species within a community, offers the best chance for community survival.
Subject: ocean
Transcript: alien species might be more likely to occur in a low Than a high diversity community. [latz:] in the ocean environment, There are many types of organisms
Life Goes On: Fishes: Defense Mechanisms
Defense mechanisms among fishes are highly diverse. They range from visual defenses, like camouflage and schooling, to being large and predatory.
Subject: ocean
Transcript: surface of the water In the open ocean are always counter-shaded. That means that their backs are dark And their bellies are silvery. And that's because
Living Together: Coral Reefs: Structures and Communities
Sometimes referred to as the rain forest of the sea, coral reefs are home to a diverse array of producers, consumers and scavengers. Collectively, these comprise a dynamic ecosystem that is, in every sense of the word, a community.
Subject: ocean