Archives de catégorie : Biodiversity

Recent Studies Indicate Species Extinctions Decline With Warming – Mass Extinction Events Due To COOLING

by K. Richard, May 16, 2019 in NoTricksZone


In the past it has been widely reported that high and abruptly changing CO2 concentrations led to climate conditions that were “too hot for complex life to survive” on the planet.
More recently, though, scientists have determined that the opposite may have been true: mass extinction events occurred during periods of global cooling, expansive ice sheet growth, and marine-habitat-destroying sea level drops of more than 100 meters.
In fact, of the 5 previous mass extinctions, volcanism-induced glaciation is thought to be responsible for the 1st, 3rd, and 4th events, with the 2nd unknown and the 5th from an aseteroid impact.  None of these explanations have ties to CO2 concentrations or sudden warming.

Image Sources: Loehle & Eschenbach (2012), BBC, Wrightstone, 2019

UN Biodiversity Officials Fail Transparency Test

by Donna Laframboise, May 13, 2019 in BigPictureNews


The United Nations Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES) is a clone of the IPCC, the UN’s climate body. But there are some notable differences.

We’re told that a great deal of power resides with the Multidisciplinary Expert Panel (MEP), which currently consists of 28 individuals. These are the people who, for example, decide which international scholars will be assigned to discuss which topics within the pages of official IPBES reports.

To its credit, that entity’s website has been designed to provide the CV of everyone who sits on this panel. Rather than taking the UN’s word for it that these are world class experts, the public is given the opportunity to examine their credentials firsthand.

But saying you believe in transparency is different from acting like it. If organizations aren’t living up to the standards they’ve set for themselves, that’s worth noticing.

Last week was hugely important for the IPBES – it sought and received massive international media coverage. Despite this, it utterly failed its own transparency test. The CVs of most MEP members aren’t actually available online.

The UN’s Extinction Warning Doesn’t Add Up (Except On The BBC)

by Toby Young, May 9, 2019 in ClimateChangeDispatch


Anyone watching the BBC’s News at Ten on Monday would have been surprised to learn that economic growth poses a dire threat to the future of life on this planet.

We’re used to hearing this from climate change campaigners, but I’ve always taken such claims with a pinch of salt, suspecting that the anti-capitalist left is distorting the evidence. Apparently not.

‘One million species at risk of imminent extinction according to a major UN report,’ intoned the BBC. ‘It says the Earth’s ecosystems are being destroyed by the relentless pursuit of economic growth.’

So does this mean the Extinction Rebellion protestors are right?

I decided to do some digging to see if one million species really do ‘face extinction in the next few decades’, as the BBC put it.

That claim is based on a report by the UN’s Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES), but it hasn’t been published yet.

Nature crisis: Humans ‘threaten 1m species with extinction’-BBC

by P. Homewood, May 7, 2019 in NotaLotofPeopleKnowThat


The BBC has just reported on the newly published Summary for Policy Makers of the as yet unpublished UN 1800 page global assessment of nature compiled by the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES). The two day old ‘climate crisis’, so recently [not] declared by the British government has already been knocked off the top spot as far as existential crises are concerned and is now officially languishing in 3rd place, in the Second Division. Land use change is now Premier Division. However, unlike action on the ‘climate crisis’, which has become a $1.5 trillion industry, action on land use change has been negligible to non-existent. Even hunting (legal and non-legal) and the direct exploitation of wildlife is one division above climate change in terms of the threat to biodiversity. Bugger all has been done to address these threats too, relatively speaking, during the last three decades, whereas trillions has been thrown at ineffective, and socially, economically and environmentally damaging attempts to limit global warming to 2C (and latterly 1.5C). I warned about this 3 years ago.

IPCC Clone Predicts Doom

by Donna Laframboise, May 6, 2019 in BigPictureNews


Here we ago again. For some time, I’ve warned that the Intergovernmental Panel on Climate Change (IPCC) is a template, that the United Nations is up to the same tricks elsewhere.

Today, in Paris, an IPCC clone known as the IPBES – the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services – will announce the completion of an 1,800-page report.

Jonathan Watts, the UK Guardian‘s global environment editor, has already told us everything we need to know about this ‘IPCC for Nature‘.

Under the headline Biodiversity crisis is about to put humanity at risk, UN scientists to warn, he insists this report was written by “The world’s leading scientists.” Funny, that’s how compliant, gullible journalists described IPCC personnel. For years and years. Until I began to notice that some of those involved were graduate students in their 20s.

WHAT? NO SIXTH EXTINCTION?

by Andrew Montford, April 23, 2019 in GWPF


Extinction Rebellion seem to be everywhere at the moment. And everywhere their story is the same. We are in the middle of a climate catastrophe. As the Huffington Post put it,

Human-caused climate change is driving sea-level rise, drought, extreme weather and a biodiversity crisis that scientists have declared Earth’s sixth mass extinction event. As many as 150 species die off each day.

Scary eh? Surely that’s enough to justify the odd street protest?

It was therefore interesting to see read some remarks from Richard Betts today. Professor Betts is the head of climate impacts at the Met Office, so his views in this area carry a certain amount of weight. Asked what he thought were the top three negative impacts of climate change that have “absolutely started”, he replied:

  • Sea level rise
  • Increasing risk of high temperatures
  • Changes in phenology and distribution for numerous species

This left me agog. There was nothing about drought or hurricanes or any of the other manifestations of extreme weather that are said to be afflicting us; nothing about floods, or typhoons, or desertification or crashing crop yields or climate refugees, mass extinctions, skydiving walruses and any of the thousand and one tall tales that climate activists spin and the media faithfully repeat every day. The contrast between this take on currently observed negative impacts and David Attenborough’s risible Climate Change: the Facts programme last week is startling. The take home message is that most of what the “national treasure” told viewers about climate change was grubby insinuation rather than fact: less to do with science than with the BBC’s ongoing eco-campaign.

“Global climate change” does not cause species extinctions

by Paul Berth, March 22, 2019 in ScienceClimatEnergie


Contrary to what the media tries to make you believe, global climate change is not a major cause of species extinction. A recent study published in March 2019 in Frontiers in Ecology and the Environment shows that the major cause of extinction is the introduction of invasive alien species (IAS) into ecosystems. This phenomenon, well known to biologists and confirmed by the IUCN (International Union for the Conservation of Nature), is unfortunately little known to the general public.

Figure 1. Number of recent animal extinctions (IUCN categories “extinct” [EX] and “extinct in the wild” [EW]) for different groups of animals (figures from IUCN Table 3a). The colors provide information on the causes of the extinctions (“Driver”); for example dark purple is used for IAS (“Alien”), extinctions caused by local species (“Native”) are light purple. The category “Neither” includes other causes of extinction or unknown causes (source, Blackburn et al., 2019).

 

 

Le “Changement climatique global’ ne cause pas de disparitions d’espèces

by Prof. Paul Berth, 22 mars 2019 in ScienceClimateEnergie


Contrairement à ce que les médias tentent de vous faire croire, le changement climatique global n’est pas une cause majeure de disparition d’espèces. Une récente étude publiée en mars 2019 dans le journal Frontiers in Ecology and the Environment vous le démontre : la cause majeure d’extinction est l’introduction d’espèces exotiques envahissantes (EEE) dans les écosystèmes. Ce phénomène, bien connu des biologistes et confirmé par l’IUCN(Union Internationale pour la Conservation de la Nature), est malheureusement peu connu du grand public.

1. Introduction

En se déplaçant d’un continent à l’autre, l’être humain a toujours emmené avec lui toute une série de plantes et d’animaux qui se retrouvaient ainsi en dehors de leurs limites biogéographiques habituelles. Avec le développement du commerce international ce phénomène ne fait que s’amplifier. Par exemple, à l’intérieur de l’Union Européenne, le nombre d’EEE aurait augmenté de 76% entre 1970 et 2007. Bien que l’impact écologique de la plupart des espèces introduites est inconnu ou semble négligeable, il est démontré que certaines introductions d’espèces ont provoqué des changements substantiels dans des écosystèmes[1]. Ces changements incluent souvent la disparition d’espèces locales[2]. On a d’abord pensé que ces phénomènes d’extinction étaient exagérés et que des espèces locales pouvaient également être à la base d’extinctions[3], et certains auteurs pensent même que les efforts déployés pour contrôler ou éradiquer les espèces étrangères introduites ne seraient pas nécessaires[4]. Cependant, personne n’a jamais vraiment testé si les espèces introduites provoquaient plus ou moins d’extinctions par rapport aux espèces locales ou aux autres causes d’extinctions. Cette question a donc été étudiée par l’équipe de Tim Blackburn (University College London, UK) dans une récente publication de mars 2019[5]. Ils ont pour cela utilisé la base de données des extinctions globales fournie par l’IUCN.

Figure 1. Nombre d’extinctions animales récentes (catégories IUCN “extinct” [EX] et “extinct in the wild” [EW]) pour différents groupes d’animaux (chiffres issus de la Table 3a de l’IUCN). Les couleurs renseignent sur les causes des extinctions (“Driver”); par exemple le mauve foncé est employé pour les EEE (“Alien”), les extinctions causées par des espèces locales (“Native”) sont en mauve clair. La catégorie “Neither” comporte les autres causes d’extinction ou alors des causes inconnues (source, Blackburn et al. 2019).

 

Global Warming off the hook? Alien species are primary cause of recent global extinctions

by University College London, March 3, 2019 in WUWT


Alien species are the main driver of recent extinctions in both animals and plants, according to a new study by UCL researchers.

They found that since 1500, alien species have been solely responsible for 126 extinctions, 13% of the total number studied.

Of 953 global extinctions, 300 happened in some part because of alien species, and of those 300, 42% had alien species alone listed as the cause of their demise.

The study, published today in Frontiers in Ecology and the Environment, used data from the 2017 IUCN Red List on the total numbers of species that are considered to have gone extinct globally since 1500.

In total, 261 out of 782 animal species (33.4%) and 39 out of 153 plant species (25.5%) listed aliens as one of their extinction drivers. In contrast, native species impacts were associated with only 2.7% of animal extinctions and 4.6% of plant extinctions.