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Let's Talk Science

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Let's Talk Science - Let's talk plastic! We discuss the UN Plastics Treaty and discover how there has been an estimated 9 billion tonnes of plastic produced globally since 1950 plus some horrifying facts about plastic waste( 0:30:28)       
Episode Information
Some unfortunate truths about the production of plastic, learn more about plastic in this episode including; • Oil producing countries and companies have vested interest in keeping us in last • Each human may have about one heaped teaspoon of microplastic distributed in their bodies • Recycling only removes a minor proportion of the problem • Ocean gyre – rotating ocean currents – gather floating plastic waste in large aggregations – five globally including the North and South Pacific subtropical gyres. • Plastic comes from land and sea sources: land – dumping in / near water ways which drain into the sea delivers a lot of plastic; plastic used in the ocean (e.g. floats etc) • Plastic is particulated – even as small as 5mm or less – more like a thick soup of particles of plastic • Albatross Chicks choking on marine plastic debris – atoll is 2000 miles away from any mainland. Hence far reach of plastic pollution • Plastic problems for the marine environment – entanglement of birds and mammals and ingestion • Henderson Island in the Pitcairn Group is a remote and uninhabited island, yet the beach is full of plastic refuse
Published: 10/07/2024 12:00:00 p.m.
Let's Talk Science - Albatrosses are on the decline potentially due to fishing lines with thousands of squid baited hooks, bird flu arrives in Antartica and has the potential to spread to Seals and Penguin colonies.( 0:23:36)       
Episode Information
Albatrosses like the Gibsons and Antipodean albatrosses (Adams Island and Antipodes Islands) have been declining – probably a result of tuna fishing where surface tuna fishing long-lines up to 100km long with thousands of squid baited hooks – these overlap with the foraging distribution of especially females which take the bait, get hooked, and then drown. So now the populations have declined with proportionately more and more males returning to the islands and even forming male/male pairs which of course don’t breed. Delayed maturation of 8 years also slows things along with breeding perhaps every two years even when things are normal. These factors combine to tip the breeding effort seriously down. Bird flu has arrived in Antarctica probably from South America / Argentina. Southern Elephant Seals and Fur Seals probably also affected and Penguin colonies in Antarctica will probably be affected. Bird flu is also found on bird islands like Falklands and South Georgia. Climate change with warming waters may change the distribution of food species in the water column or latitude so making the species unavailable to seabirds causing further stress on the birds. Species are adaptable but it is a question of timing and rate of change which may determine whether a species may survive changes.
Published: 12/06/2024 12:00:00 p.m.
Let's Talk Science- Dr Sherley gives us the dismal news about West Antarctic Ice Sheet melting - now considered unstoppable over the next few centuries( 0:27:41)       
Episode Information
West Antarctic Ice Sheet melting now considered unstoppable over the next few centuries – even if we meet Green House Gas emission targets and Global Warming targets of 1.5 degrees Celsius pre industrial levels by 2050. Greg reports on this news and explains the mechanism of the ice melt outlining some of the consequences. A must listen.
Published: 17/04/2024 12:00:00 p.m.
Talking Invasive species, Global Environment Facility and invasive species with Dr Greg Sherley( 0:34:37)       
Episode Information
This episode looks at threats posed by Invasive Species in the Pacific Islands and Territories and the allied problem of Biosecurity, preventing invasions and discussing the capitalisation of the last 5 years success of the Pacific Regional Invasive Species Management Service (PRISMSS)
Published: 21/02/2024 12:00:00 p.m.
Eradicating species on Pitcairn Island( 0:27:4)       
Episode Information
How do you get rid of invasive species on a remote island in the pacific ocean? Dr Greg Sherley continues his investigation on how to plan work to help identify and eliminate species on Pitcairn Island as well as ensuring the administration, technical support and funding required for the project. Dr Sherley is a Member of the New Zealand Order of Merit for services to conservation and has a Doctor of Philosophy - PhD Zoology/Animal behavioural ecology. He has worked in the general environment sector for all his career in New Zealand and the Pacific. If you have any science questions you want to put to Dr Greg Sherley, please send them to admin@coastaccessradio.org.nz
Published: 21/12/2023 5:45:47 p.m.
Let's Talk Science- Pitcairn Island part 2. How did Greg get back on the boat, the kiore rat eradication attempts and Biosecurity for Pacific Islands.( 0:30:11)       
Episode Information
Part 2 of our chat about Dr Greg Sherley's visit to Pitcain Island. If you didn't hear about the extraordinary journey to get to the island, revisit our previous episode. In this episode we talk more about Pitcairn in particular types of weeds and the main threats to natural assets on the Island. What is the response to these species, how effective are natural enemies, and how do they know when it is successful.
Published: 25/11/2023 1:14:06 p.m.
Let's Talk Science-Dr Greg Sherley visits Pitcairn Island talking about the environmental problems faced by the island and the extradinary effort it takes to get to the Island.( 0:30:13)       
Episode Information
We talk about biogeography and history of Pitcairn Islands, what other islands belong to the Pitcairn Group and who is responsible for the Island. Dr Sherley discusses some of the unique advantages of Pitcairn Island – e.g. bee disease free island
Published: 27/10/2023 2:51:14 p.m.

Dr Greg Sherley covers diverse range of subjects describing how science can inform the management of our planet. Find out about invasive species – what they are and how we can eliminate them; climate change - are we winning or losing this battle and find out about conservation initiatives. Dr Sherley is a Member of the New Zealand Order of Merit for services to conservation and has a Doctor of Philosophy - PhD Zoology/Animal behavioural ecology. He has worked in the general environment sector for all his career in New Zealand and the Pacific. If you have any science questions you want to put to Dr Greg Sherley, you can send them to admin@coastaccessradio.org.nz


Host: Dr Greg Sherley

Produced By: Coast Access Radio

Language: English

Category: Learning Centre

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