Series: Life in the Sea
This seminal program is widely suitable for senior level primary science, lower secondary science and at an introductory level in Marine Studies university courses. It looks at the basic lifestyles of organisms in the sea. The first three lifestyles are the most fundamental drifters, swimmers and bottom dwellers. The second three are the basis of all food webs producers, consumers and decomposers. These 3 X 3 basic rules give us a fundamental way of understanding how any ocean ecosystem works. Show Less
In the solar system only earth has life, and clearly that has been made possible because we have oceans of liquid water. But why only on earth? And what are the factors that have made earth’s oceans hospitable to life? If you set up an aquarium you will have to confront some of these issues, because an aquarium has to replicate these factors or everything in it will die. Water temperature, water retention, circulation, oxygenation, temperature stability and maintaining a food chain are the main ones. We set them up artificially in an aquarium, but an aquarium is in fact a microcosm of nature. So how does nature achieve these things? This film looks at a very big picture - the big parameters of life in the sea. We explain why earth is so incredibly lucky that all the factors have come together to support life here. We also mention how they have faltered in the past and so caused extinction events and how, indeed, we should take nothing for granted for the future. Show Less
Estuaries… many of us live on or near an estuary and maybe use it for boating or fishing or swimming, or even just for the view. Estuaries are often at the heart of coastal cities. But what’s their story? What’s happening under the water and why are our estuaries increasingly threatened? This programme defines what an estuary is, explains where they are found, and describes the ways that they are formed. It also includes a case study of a typical estuary and how tidal flow, salt water wedging, seasonal change, human use and pollution are effecting it. Show Less
Photosynthesis supplies all oxygen for life, and it began in the sea. Amazingly, it all relies on one basic kind of chemical reaction that was achieved over two billion years ago by cyanobacteria, and cyanobacteria living as endosymbionts in plants and phytoplankton still produce almost all our oxygen. This programme tells the story of the cyanobacteria, how they changed our planet and are involved in supporting its many life forms. We look at the four major groups that photosynthesise in the sea: cyanobacteria, eucaryote phytoplankton (microalgae), seaweeds (macroalgae), and seagrasses. These groups are responsible for supplying around half the oxygen we breathe—so in terms of understanding the processes that keep us alive, this is a very important story. Show Less
This programme looks at how rocky shores and shoreline reefs are formed, explains the three zones of a coastline, and examines the fauna and flora that live on on the coastline.
Life in the Sea explains the distinguishing features of the six most common phyla - from the basic body plans of sponges to the sophisticated anatomy of the chordates. The key points of each body plan are explained and how they equip their owners for survival. After watching this program, students will be able to classify the most common marine organisms at the phylum level. Show Less
This programme is about seawater. It is the most important liquid on Earth, not only from its sheer volume, but also because it has remarkable qualities. A few of them, like buoyancy, are common to all liquids - but seawater is also the cradle of life. Three key factors of water underpin life in the sea: water’s dissolving power, its tendency to keep a stable temperature, and its transparency to light. This programme explains the mechanisms and the outcomes of these key facts—and other things—that make seawater both weird and wonderful. Show Less