UN-UNESCO Global Assessment Report: "The loss of species, ecosystems and genetic diversity is already a global and generational threat to human well-being."

Smithsonian.com, 6 May 2019:

Our world is losing biodiversity, and fast. According to a report released today by the United Nations, up to one million species could face extinction in the near future due to human influence on the natural world. Such a collapse in biodiversity would wreak havoc on the interconnected ecosystems of the planet, putting human communities at risk by compromising food sources, fouling clean water and air, and eroding natural defenses against extreme weather such as hurricanes and floods.

In the sweeping UN-backed report, hundreds of scientists found that biodiversity loss poses a global threat on par with climate change. A 40-page “Summary for Policy Makers” was released in advance of the full report, which is expected to be published later this year and span nearly 2,000 pages. The document calls the rate of change in nature “unprecedented” and projects that species extinctions will become increasingly common in the coming decades, driven by factors such as land development, deforestation and overfishing.

“The basic message is the same as what the scientific community has been saying for more than 30 years: Biodiversity is important in its own right. Biodiversity is important for human wellbeing, and we humans are destroying it,” Robert Watson, the former chair of the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES) that produced the report, said during a press conference on Monday.

To produce the report, 145 biodiversity experts plus hundreds of other contributors compiled information over three years from 15,000 sources. For years, scientists have been sounding the alarm about biodiversity’s dramatic decline in what some have dubbed the world’s sixth mass extinction event. This die-off, however, differs from the other five in its central cause: humans.

As the global assessment confirms, human activity is a major driver of biodiversity decline among the millions of species on Earth. The report ranks some of the top causes of species loss as changes in land and sea use, direct exploitation of organisms (like hunting or fishing), climate change, pollution and invasive alien species (often introduced by human travel across ecosystems). The current global rate of species extinction is already “at least tens to hundreds of times higher than it has averaged over the past 10 million years,” and it’s expected to keep accelerating.

All in all, human action has “significantly altered” about 75 percent of the world’s land environment and 66 percent of its marine environment, according to the report. Insect populations have plummeted in tropical forests, grasslands are increasingly drying out into deserts, and pollution along with ocean acidification is driving many coral reef ecosystems to the brink.

The destruction of biodiversity at all levels, from genes to ecosystems, could pose significant threats to humankind, the report says. In addition to affecting human access to food resources, clean water and breathable air, a loss of species on a global scale could also clear a path for diseases and parasites to spread more quickly, says Emmett Duffy, a biodiversity expert with the Smithsonian Environmental Research Center who contributed to the report.

“Historically, a lot of us have thought about conservation and extinction in terms of charismatic animals like pandas and whales,” Duffy says. “But there’s a very strong utilitarian reason for saving species, because people depend on them. There’s an environmental justice aspect.”

The effects of biodiversity loss won’t be distributed equally, either, the researchers found. The most devastating impacts would disproportionately affect some of the world’s poorest communities, and the report concludes that the decline in biodiversity undermines global progress toward the Sustainable Development Goals, milestones set by the U.N. General Assembly in 2015 to reduce global inequality…..

Read more: https://www.smithsonianmag.com/science-nature/one-million-species-risk-extinction-threatening-human-communities-around-world-un-report-warns-180972114/#exuFQ5WihTWc7MTq.99

IPBES Global Assessment Preview, excerpt:

Important aspects of the Global Assessment

Building upon earlier IPBES assessment reports, especially the recently-released Land Degradation and Restoration Assessment and the Regional Assessment Reports for Africa, the Americas, Asia-Pacific and Europe and Central Asia (March, 2018), the Global Assessment:

• Covers all land-based ecosystems (except Antarctica), inland water and the open oceans
• Evaluates changes over the past 50 years — and implications for our economies, livelihoods, food security and quality of life
• Explores impacts of trade and other global processes on biodiversity and ecosystem services
• Ranks the relative impacts of climate change, invasive species, pollution, sea and land use change and a range of other challenges to nature
• Identifies priority gaps in our available knowledge that will need to be filled
• Projects what biodiversity could look like in decades ahead under six future scenarios: Economic Optimism; Regional Competition; Global Sustainability; Business as Usual; Regional Sustainability and Reformed Markets
• Assesses policy, technology, governance, behaviour changes, options and pathways to reach global goals by looking at synergies and trade-offs between food production, water security, energy and infrastructure expansion, climate change mitigation, nature conservation and economic development

What the CSIRO and climatechangeinaustralia.gov.au state about coastal New South Wales:

KEY MESSAGES

·         Average temperatures will continue to increase in all seasons (very high confidence).

·         More hot days and warm spells are projected with very high confidence. Fewer frosts are projected with high confidence.

·         Decreases in winter rainfall are projected with medium confidence. Other changes are possible but unclear.

·         Increased intensity of extreme rainfall events is projected, with high confidence.

·         Mean sea level will continue to rise and height of extreme sea-level events will also increase (very high confidence).

·         A harsher fire-weather climate in the future (high confidence).

·         On annual and decadal basis, natural variability in the climate system can act to either mask or enhance any long-term human induced trend, particularly in the next 20 years and for rainfall.

At its ordinary monthy meeting of 23 April 2019 Clarence Valley Council passed the following resolution: