Uploaded August 2023 | Updated September 2026, 1 day ago

---

You can find all my A Level Biology videos fully indexed at freesciencelessons.co.uk/a-level-revision-videos/a-level-biology

In this video, we look at what is meant by biodiversity. We explore habitat biodiversity, species biodiversity (including species richness and species evenness) and finally genetic biodiversity.

Image credits:

Two Ivory gulls in the drift ice of the arctic
commons.wikimedia.org/wiki/File:Two_Ivory_gulls_in_the_drift_ice_of_the_arctic.jpg
Andreas Weith, CC BY-SA 4.0 creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons

Rainforest Mexico
commons.wikimedia.org/wiki/File:Chiapas_Rainforest_crop.jpg
Bild von bere von awstburg auf Pixabaypixabay.com/de/photos/die-dschungel-von-chiapas-1865639/, CC0, via Wikimedia Commons

Woodland
commons.wikimedia.org/wiki/File:Woodland_Bluebells.jpg
Prosthetic Head, CC BY-SA 4.0 creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons

Meadow
commons.wikimedia.org/wiki/File:Hunsdon_Mead_meadow_in_Hertfordshire,_England.jpg
Glyn Baker / A proper Meadow / CC BY-SA2.0

Sand Dune
commons.wikimedia.org/wiki/File:Sand_Dune_at_Luce_Bay_-_geograph.org.uk_-_3172239.jpg
Sand Dune at Luce Bay by Billy McCrorie, CC BY-SA 2.0 creativecommons.org/licenses/by-sa/2.0, via Wikimedia Commons

Stream
commons.wikimedia.org/wiki/File:Wood_sorrel_and_stream_-_geograph.org.uk_-_3948795.jpg
Wood sorrel and stream by Andrew Hill, CC BY-SA 2.0 creativecommons.org/licenses/by-sa/2.0, via Wikimedia Commons

Arctic Ice
commons.wikimedia.org/wiki/File:Arctic_ice.jpg
Patrick Kelley, CC BY 2.0 creativecommons.org/licenses/by/2.0, via Wikimedia Commons

Hedgehog
commons.wikimedia.org/wiki/File:West_European_Hedgehog_(Erinaceus_europaeus)1.jpg
Hrald, CC BY-SA 3.0 creativecommons.org/licenses/by-sa/3.0, via Wikimedia Commons

Tree Sparrow
commons.wikimedia.org/wiki/File:Tree_sparrow_at_Filey_Dams_-_geograph.org.uk_-_4204715.jpg
Tree sparrow at Filey Dams by Pauline E, CC BY-SA 2.0 creativecommons.org/licenses/by-sa/2.0, via Wikimedia Commons

Goat moth
commons.wikimedia.org/wiki/File:The_goat_moth_(Cossus_cossus)_(14272200301).jpgPavel Kirillov from St.Petersburg, Russia, CC BY-SA 2.0 creativecommons.org/licenses/by-sa/2.0, via Wikimedia Commons

Bullfinch
commons.wikimedia.org/wiki/File:Eurasian_Bullfinch,_Pyrrhula_pyrrhula_(36932276974).jpg
keith gallie from Warrington, UK, CC BY 2.0 creativecommons.org/licenses/by/2.0, via Wikimedia Commons

Bank vole
commons.wikimedia.org/wiki/File:Myodes-glareolus-roetelmaus-bank-vole_(cropped).jpg
Photopippo, CC BY-SA 3.0 creativecommons.org/licenses/by-sa/3.0, via Wikimedia Commons

Hedgerow
commons.wikimedia.org/wiki/File:Hedgerow_-_geograph.org.uk_-_4319256.jpg
Hedgerow by N Chadwick, CC BY-SA 2.0 creativecommons.org/licenses/by-sa/2.0, via Wikimedia Commons

Wheatfield
commons.wikimedia.org/wiki/File:Wheat_field_-_geograph.org.uk_-_3610288.jpg
Wheat field by Richard Webb, CC BY-SA 2.0 creativecommons.org/licenses/by-sa/2.0, via Wikimedia Commons

Cows
commons.wikimedia.org/wiki/File:Curious_Cows_-_geograph.org.uk_-_1918757.jpg
Curious Cows by Ashley Dace, CC BY-SA 2.0 creativecommons.org/licenses/by-sa/2.0, via Wikimedia Commons

Woman
commons.wikimedia.org/wiki/File:Woman_1.jpg
Owlsmcgee, Public domain, via Wikimedia Commons

DNA
commons.wikimedia.org/wiki/File:%C3%81cido_desoxirribonucleico_(DNA).png
Kadumago, CC BY 4.0 creativecommons.org/licenses/by/4.0, via Wikimedia Commons

Fruit fly
commons.wikimedia.org/wiki/File:Fruit_Fly_(Drosophila_immigrans)_(13114869053).jpg
Martin Cooper from Ipswich, UK, CC BY 2.0 creativecommons.org/licenses/by/2.0, via Wikimedia Commons

Siamese cat
commons.wikimedia.org/wiki/File:Siam_lilacpoint.jpg
Karin Langner-Bahmann, upload von Martin Bahmann, CC BY-SA 3.0 creativecommons.org/licenses/by-sa/3.0/, via Wikimedia Commons

Sphinx cat
commons.wikimedia.org/wiki/File:Sphinx2_July_2006.jpg
M.Minderhoud at Dutch Wikipedia, CC BY-SA 3.0 creativecommons.org/licenses/by-sa/3.0/, via Wikimedia Commons

M.M.Minderhoud or Wikipedia/Michiel1972
Persian Cat
commons.wikimedia.org/wiki/File:Persialainen.jpg
The original uploader was Lajoma at Finnish Wikipedia., CC BY-SA 3.0 creativecommons.org/licenses/by-sa/3.0/, via Wikimedia Commons