Category:Biodiversity
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Biodiversity Crisis
The biomass of terrestrial vegetation worldwide has halved over human history 3, with a corresponding loss of more than 20% of this realm’s original biodiversity 1. More than 70% of the Earth’s land surface has been altered by humans 1.
There have been over 700 vertebrate 1, and nearly 600 plant 4, extinctions recorded since the 16th Century, and many more species have likely gone extinct unnoticed 5.
Massive population declines that are the precursors to extinction have also occurred worldwide; since only 1970, more than 60% of all terrestrial vertebrate individuals have disappeared 6, such that there are now at least one million species threatened with extinction6 out of an estimated 7.3 – 10.0 million eukaryotic species on the planet 7.
The total global biomass of wild animals today is < 25% of what it was during the Late Pleistocene8, and even insect species appear to be in rapid decline in many parts of the world 9-13.
There is now less than 15% of the original wetland area that was present during the 18th Century 14, and over three-quarters of rivers more than 1000 km long no longer flow freely along their entire course 15.
Over two-thirds of ocean area has been compromised to some extent by human endeavour 16
Live coral cover on reefs has halved since the mid-19th Century 17, seagrass extent has been decreasing by 10% per decade over the last century 1, kelp forests have declined by nearly 40%18, and the biomass of large predatory fishes is now less than a third of what it was last century 19.
Of the estimated 0.17 Gt of biomass of terrestrial vertebrates on Earth today, most of this is represented by livestock (59%) and living human beings (36%) — only about 5% of this total biomass is taken up by wild mammals, birds, reptiles and amphibians8.
Even our domesticated species are in decline — some 10% of domesticated breeds of mammals have become extinct in human history, with more than 1000 others threatened with extinction 20
Even cultivated plants are becoming threatened, with about 200 cultivated species threatened with extinction 21, and a global homogenisation of food crop species used to feed the world over the last 50 years 22. All this means that we are now without a doubt well within a sixth mass extinction event.
Next time someone you know argues that the natural world isn’t that poorly off, you can show them this rather depressing list of facts to the contrary.
CJA Bradshaw
References
1. Díaz et al. Pervasive human-driven decline of life on Earth points to the need for transformative change. Science 366, eaax3100 (2019)
2. Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services. Global Assessment Report on Biodiversity and Ecosystem Services. (IPBES Secretariat, Paris, France, 2019)
3. Erb et al. Unexpectedly large impact of forest management and grazing on global vegetation biomass. Nature 553, 73-76 (2018)
4. Humphreys et al. Global dataset shows geography and life form predict modern plant extinction and rediscovery. Nat. Ecol. Evol. 3, 1043-1047 (2019)
5. Tedesco et al. Estimating how many undescribed species have gone extinct. Conserv. Biol. 28, 1360-1370 (2014)
6. WWF. Living Planet Report 2016. (WWF, Gland, Switzerland, 2016)
7. Mora et al. How many species are there on Earth and in the ocean? PLoS Biol. 9, e1001127 (2011)
8. Bar-On et al. The biomass distribution on Earth. Proc. Natl. Acad. Sci. USA 115, 6506 (2018)
9. Bidau. Doomsday for insects? The alarming decline of insect populations around the world. Entomol. Ornithol. Herpetol. 7, 1000e1130 (2018)
10. Hallmann et al. More than 75 percent decline over 27 years in total flying insect biomass in protected areas. PLoS One 12, e0185809 (2017)
11. Lister & Garcia. Climate-driven declines in arthropod abundance restructure a rainforest food web. Proc. Natl. Acad. Sci. USA 115, E10397 (2018)
12. Powney et al. Widespread losses of pollinating insects in Britain. Nat. Comm. 10, 1018 (2019)
13.Forister et al. Declines in insect abundance and diversity: we know enough to act now. Conserv. Sci. Pract. 1, e80 (2019)
14. Davidson. How much wetland has the world lost? Long-term and recent trends in global wetland area. Mar. Freshw. Res. 65, 934-941 (2014)
15. Grill et al. Mapping the world’s free-flowing rivers. Nature 569, 215-221 (2019)
16. Halpern et al. Patterns and emerging trends in global ocean health. PLoS One 10, e0117863 (2015)
17. Frieler et al. Limiting global warming to 2 °C is unlikely to save most coral reefs. Nat. Clim. Change 3, 165-170 (2013)
18. Krumhansl et al. Global patterns of kelp forest change over the past half-century. Proc. Natl. Acad. Sci. USA 113, 13785 (2016)
19. Christensen et al. A century of fish biomass decline in the ocean. Mar. Ecol. Prog. Ser. 512, 155-166 (2014)
20. FAO. The State of the World’s Animal Genetic Resources for Food and Agriculture. (Food and Agriculture Organization of the United Nations, Rome, Italy, 2016)
21. Hammer & Khoshbakht. Towards a ‘red list’ for crop plant species. Genet. Resour. Crop Evol. 52, 249-265 (2005)
22. Khoury et al. Increasing homogeneity in global food supplies and the implications for food security. Proc. Natl. Acad. Sci. USA 111, 4001 (2014)
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We live in an age of rapid and unprecedented planetary change. Indeed, many scientists believe our ever-increasing consumption, and the resulting increased demand for energy, land and water, is driving a new geological epoch: the Anthropocene. It’s the first time in the Earth’s history that a single species – Homo sapiens – has had such a powerful impact on the planet.
This rapid planetary change, referred to as the ‘Great Acceleration’, has brought many benefits to human society. Yet we now also understand that there are multiple connections between the overall rise in our health, wealth, food and security, the unequal distribution of these benefits and the declining state of the Earth’s natural systems. Nature, underpinned by biodiversity, provides a wealth of services, which form the building blocks of modern society; but both nature and biodiversity are disappearing at an alarming rate. Despite well-meaning attempts to stop this loss through global agreements such as the Convention on Biological Diversity, we are failing; current targets and consequent actions amount, at best, to a managed decline. To achieve climate and sustainable development commitments, reversing the loss of nature and biodiversity is critical...
An Unseen World
The 'Tiny Little Ones'
- Microbiomes full of untapped secrets
Connections & Communities
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Micro- to Macro- ... from the Tiny (as in Tiny Blue Green) 'Micro-Organisms' to the Largest 'Macro-Creatures'
Biodiversity Topics / Wikipedia
Extinction Issues / GreenPolicy -- http://www.greenpolicy360.net/w/Extinction
Trillions of (micro) species -- https://cosmosmagazine.com/life-sciences/earth-home-trillion-species
Microbial 'new' Tree of Life -- http://www.nytimes.com/2016/04/12/science/scientists-unveil-new-tree-of-life.html
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Do Insects Count? Who Cares About Insects, Right? Wrong?
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Saving Species, Notes from the Edge
The botanists’ last stand: The daring work of saving the last samples of dying species
Save a Butterfly, Save a Species / July 31
- http://www.boredpanda.com/rare-blue-swallowtail-pipevine-butterfly-repopulation-tim-wong/
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Tree of Life
Tree of Life
Announced September 2015 / http://www.greenpolicy360.net/w/Tree_of_Life
The first draft of ‘Tree of Life’ data diagrams include 2.3 million species -- The goal of reconstructing the tree of life is one of the most daunting challenges in biology. The scope of the problem is immense... most species have yet to be described. Despite decades of effort and thousands of phylogenetic studies on diverse clades, we lack a comprehensive tree of life, or even a summary of our current knowledge. One reason for this shortcoming is lack of data...
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The ecologist's field guide to sequence-based identification of biodiversity
Keywords: DNA sequencing; metabarcoding; metagenomics; metatranscriptomics; molecular ecology; biodiversity
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Nature was always present... It was participant, impetus, and catalyst. It was the riches that made nations wealthy and powerful, and over which their armies; it was the wildness our ancestors insisted on taming, the scourge that left them despairing, and the blessing that kept them alive. How and where and by what design people built their homes and businesses depended on natural conditions and endowments. Inspirations for what people wrote and painted, what they wore, and said to each other, how they planned their day and spent their leisure time, and what they chose as a livelihood all flowed from an organic setting. Nature shaped strategies in war and gave form to economics, and its wealth or privation determined that of people and their enterprises.
- -- The Gulf
- by Jack E. Davis
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The Rich Biosphere of the Rainforest Canopy, "Cradle of New Life Forms"
SJS / GreenPolicy Siterunner:
January 2013
I want to say a few words about Don Perry, Dr. Perry, who swung in and posted a couple comments yesterday about climate change, global warming and its coming impacts.
Be aware, Don is not your standard scientist who has dwelt in academia, collecting accolades and plaudits for his lifetime of work and explorations of the bio-universe. Don has gone on from UCLA to literally change the way we see our world.
As I used to say about Don, when we were working together back when I lived in LA and he was starting his career that would revolutionize the science of tropical forest study, Don is unique in his field, he's a pioneer (and "bioneer"), he's an explorer, an inventor. Don invented new techniques and methods for ascending and studying the 'real jungle', up above far from LA's glam, and proceeded to enable and show us what the resplendent, amazing rainforest, the richest biosphere on earth, the canopy, was like and it was wonderful... first-ever pictures and reports and science from on high. I was privileged to help as his representative and we saw Don's visions reach audiences around the world as he opened eyes to the eco-wonders of the environment we live in and the world we came from long ago, that is, if you believe in evolution... Don was a "Jacques Cousteau of the Rainforest Canopy." I meant the words when I said them and still do. Don's pioneering work has been featured in Scientific American, National Geographic, Smithsonian, New York Sunday Times magazine, Life, Newsweek, Paris Match, Quick of Germany, Popular Science, and many more popular and scientific media.
I have to say that Don's career is one-of-a-kind, an unparalleled feat of brave, courageous ascents and creative imagination and engineering that followed...
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Subcategories
This category has the following 31 subcategories, out of 31 total.
Pages in category "Biodiversity"
The following 159 pages are in this category, out of 159 total.
A
B
C
- C40 Cities Climate Leadership Group
- Caloundra, Australia Biodiversity Strategy 2006
- Capitalism and the Environment
- Citizen Science
- Climate News
- Climate News Events Archive ... 1970 to Today
- Climate Problems, Climate Solutions
- Conservation biology
- Conservation movement
- Convention on Biological Diversity
- Convention on the Conservation of Migratory Species of Wild Animals
- Cork, Ireland City Biodiversity Plan
D
E
- Earth and Space, Politics
- Earth Day
- Earth Day 2020
- Earth Day Is Every Day
- Earth Day Memories on the 50th Anniversary
- Earth Science
- Earth Science Research from Space
- Earth Science Vital Signs
- Earthrise
- Ecolivia
- Ecotourism
- Edinburgh, Scotland Biodiversity Action Plan
- Endangered species
- Endangered Species Recovery Plan
- Environmental agreements
- Environmental full-cost accounting
- Environmental Law, Rollbacks under Trump 2016-20
- Environmental Laws and Modern Environmental Movement
- Environmental movement
- Environmental protection
- Environmental Protection Agency
- Environmental Security Organizations
- Environmental Studies Online
- EOS eco Operating System
- Extinction
G
- GDP+
- Generation Green
- George E. Brown Jr
- Global Fishing Watch
- Global Forest Watch
- Google Earth Timelapse
- GP360 NewPages
- Green Development Initiative (GDI)
- Green Education
- Green Politics 360
- Green Quotes
- Green Stories of the Day
- Green Stories of the Day - GreenPolicy360 Archive
- Greening Our Blue Planet
- GreenLinks
- GreenPolicy360 (eOS)
- GreenPolicy360 Archive Highlights 2013
- GreenPolicy360 Archive Highlights 2014
- GreenPolicy360 Archive Highlights 2015
- GreenPolicy360 Archive Highlights 2016
- GreenPolicy360 Archive Highlights 2017
- GreenPolicy360 Archive Highlights 2018
- GreenPolicy360 Archive Highlights 2019
- GreenPolicy360 Archive Highlights 2020
- GreenPolicy360 Archive Highlights 2023
- GreenPolicy360 Highlights
I
- INaturalist
- INDCs
- Intended Nationally Determined Contributions
- Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services
- International Treaty on Plant Genetic Resources for Food and Agriculture
- International Year of Biodiversity
- IPBES, Biodiversity and Extinction
- It's All Related
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N
P
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Media in category "Biodiversity"
The following 6 files are in this category, out of 605 total.
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- A Fierce Green Fire.jpg 208 × 314; 13 KB
- A land ethic .jpg 864 × 668; 79 KB
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