Series:

Thumbnail	Title	Series Number	Date	Description
	Biological control		28 May 1974	This programme looks at the success in the control of pests by enlisting the services of natural...
	Indicator species : lichens and air pollution		10 September 1974	This programme is about the effect of sulphur dioxide on lichen growth and how lichen distribution...
	Flevoland polders : a managed succession		06 August 1974	Flevoland is an area in Holland which has been reclaimed from Ijsselmeer. The film is about the...
	Ants and acacias : an ecological study		1974
	Ants and acacias : an ecological study		23 July 1974	This programme examines the symbiotic relationship between ants (Pseudomyrex belti) and acacias...
	Ecological sampling		26 March 1974	This programme examines methods of sampling arthropod life above ground, in grassland and in the soil.
	Desert ecology		20 June 1974	This programme deals with the climate and some of the organisms which live in hot deserts. The...
	Esthwaite and the Blelham tubes		26 February 1974	This programme illustrates some methods of studying the primary productivity of lakes and how the...
	Historical ecology : Whittlesea Mere		08 October 1974	This programme is about Whittlesea Mere, originally an area of open water and swamp, which was...
	Grassland and cereal ecosystems		24 September 1974	This programme examines the characteristics of grass and cereal ecosystems.