Fresh reflection on COP 16 of the Convention on Biological Diversity

Margherita Pieraccini and Naomi Millner at COP16. Sat down and holding a block representing the SDGs,
Margherita Pieraccini and Naomi Millner at COP16.

As 2024 is drawing to a close, Conferences of the Parties (COPs) of three major Multilateral Environmental Agreements are happening in close succession: COP 16 of the Convention on Biological Diversity (CBD) was held between end of October and the beginning of November, COP 29 of the UN Convention on Climate Change (UNFCCC) is happening in mid-November, and COP 16 of the UN Convention to Combat Desertification will take place in early December.

Although exploring the synergies between these three COPs is of great importance and their close temporal proximity this year facilitates such discussion, I will focus solely on the CBD COP 16 as I had the opportunity to attend it in person as a University of Bristol academic observer.

CBD COP 16, held in Cali, Colombia started on the 21st of October and was due to end on the 1st of November. Negotiations overrun until the morning of the 2nd of November but they were suspended as the quorum was lost, leaving discussions on some key issues such as the strategy for resource mobilization to be resumed at a later date.

As biodiversity COPs are held biannually, COP 16 was the first COP since the adoption of the Kunming-Montreal Global Biodiversity Framework (GBF) at COP 15 in 2022. No one was expecting the negotiation of another major agreement at COP 16, with the key issue being the implementation of the GBF framework.

An introduction to the GBF

Differently from the Paris Agreement under the UNFCCC, the GBF is not legally binding.  Nevertheless, given that the boundary between binding and non-binding instruments in international environmental law is not always so clear-cut, the GBF has a central role in directing biodiversity law and policy. The GBF is a largely aspirational goal and target-oriented instrument. It contains four Goals to ‘live in harmony with nature’ by 2050 and 23 global Targets for 2030, split into three categories, namely ‘reducing threats to biodiversity’, ‘meeting people’s needs through sustainable use and benefit-sharing’ and ‘tools and solutions for implementation and mainstreaming’.  The Targets have different degrees of ‘quantifiability’, impacting also on Parties’ strategies and methodologies of implementation.

For example, the well- known ‘30 by 30’ target (Target 3) sets the threshold of 30% of the coverage of protected areas and other effective area-based conservation measures (OECMs) in terrestrial and inland water areas as well as marine and coastal areas to be reached by 2030. In contrast, Target 5, which still falls within the first category of ‘reducing threats to biodiversity’, is framed using a more general language: ‘ensure that the use, harvesting and trade of wild species is sustainable, safe and legal, preventing overexploitation, minimizing impacts on non-target species and ecosystems, and reducing the risk of pathogen spillover, applying the ecosystem approach, while respecting and protecting customary sustainable use by indigenous peoples and local communities.’

There are not only differences between Targets but the wordings of individual Targets themselves is sometimes contradictory, making for complex implementation as conflicting directions are suggested. For example, Target 19 pushes for the marketisation of nature, encouraging the private sector to invest in biodiversity and employing uncritically the language of green bonds and payments for ecosystem services, whilst, at the same, promoting the role of ‘Mother Earth centric action and non-market approaches’. Even if not all targets are rife with internal contradictions, other internal differences may exist, with some objectives expressed in a qualitative rather than a quantitative manner or by reference to concepts that lack unified legal definitions. This makes it more difficult to devise specific indicators, with the consequence that Parties will likely concentrate on the objectives requiring easier interpretative skills. For example, going back to the ‘30 by 30’ Target 3, the quantitative component is followed by references to ‘equitably governed systems’, which could mean very different things to different regulatory actors and there is still much work to be done on the identification of OECMs.

It should be recalled that this is not the first time the CBD employs the language of Targets and Goals. Notably, the CBD Strategic Plan for Biodiversity 2011-2020 included the Aichi Biodiversity Targets structured around 5 strategic goals, though most were not achieved and few partially achieved, as reported in the Global Biodiversity Outlook 5. COP 16’s focus on implementation was therefore crucial to avoid historical failures repeating themselves in 2030.

The spaces and voices of COP 16

COPs are notoriously busy and chaotic events. COP 16 of the CBD did indeed feel busy, with many side events happening simultaneously and in parallel to the formal negotiations of the two Working Groups and plenaries, as well as press conferences and Pavilion events. It was also the largest-ever CBD COP with some 23,000 registered delegates. Yet, the Conference Centre that hosted COP 16 in Cali was very capacious and the horizontal disposition of the spaces facilitated inter-ethnic, inter-generational, inter-disciplinary and of course inter-jurisdictional discussions under a Colombian sky often veiled by clouds.

It was a pleasant surprise to witness the high representation of youth, as well as indigenous peoples and local communities advocating for their rights and the rights of nature, though one may wonder if this was primarily due to the fact that COP 16 was organised in South America where the question of who is indigenous and who is not is not as contested as in other continents (such as Africa) and where youth environmental activism is thriving.

Side events also saw the participation of a plurality of voices, hosting delegates from a myriad of Inter-governmental organisations (IGOs) and Non-Governmental Organisations (NGOs), as well as researchers, Secretariat members and sometimes Parties. Thus, cross-fertilisation of ideas dominated the Conference with the hope that points made in side events by activists, academics, and others could filter through Parties to the negotiation tables. Indeed, many times in side events speakers addressed the audience as if it were an audience entirely made up by Parties’ delegates (seldom the case in practice), encouraging it to report back to the contact groups, which are closed working groups attended by Parties discussing draft texts of decisions.

Human rights as a framing device for different world-makings

The language of human rights pervaded the whole COP 16. This is a recent turn for the CBD, considering that the CBD itself and its instruments pre-GBF do not explicitly refer to human rights. In contrast, the GBF lists among the considerations for the implementation of the Framework a ‘human rights-based approach’. Section C 7(g) states in full that ‘the implementation of the Framework should follow a human rights-based approach, respecting, protecting, promoting and fulfilling human rights. The Framework acknowledges the human right to a clean, healthy and sustainable environment’. There are a few other references to human rights language scattered in the text. For example, in Target 22, reference is made to the ‘full protection of environmental human rights defenders’. The GBF’s explicit inclusion of human rights language and also the acknowledgement of a substantive human right to a clean, healthy and sustainable environment—which cross references the UN General Assembly Resolution of 28 July 2022—has solidified the link between human rights and biodiversity protection. Thus, it is not surprising that delegates at COP 16 used human rights language extensively.

In this context, it was interesting to observe that different groups internalised and strategically deployed human rights language to advance different, sometimes, but not always complementary, world-makings. Youth representatives referred to human rights as a tool for achieving inter-generational equity in biodiversity conservation; many indigenous peoples’ representatives employed human rights language to advance substantive claims such as rights to land and resources as well as procedural ones such as participatory rights in conservation decision-making; women representatives employed human rights language to address gender inequalities in conservation; some UN representatives strongly supported a human rights-based approach to area-based conservation as a means to avoid the tragedies brought about by ‘fortress conservation’; others used human rights language to reiterate key objectives of existing international law instruments.

The concept of human rights returned over and over in COP discussions intersecting with other reflections that unwrap the many lines around which biodiversity is framed and practiced by different communities and actors.

Outcomes and beyond

As mentioned above, COP 16 was suspended leaving for a later date, decisions on some critical issues, such as finance mechanisms and monitoring mechanism to measure Parties’ progress in achieving GBF Targets and Goals. Considering the slow implementation of the GBF- only 44 Parties have submitted revised National Biodiversity Strategies and Action Plans (NBSAPs), which are the main national implementation tools under Article 6 of the CBD- it is disappointing that decisions on budget and monitoring mechanisms have been left pending. However, there were also many achievements at COP 16, including:

  • the launch of the ‘Cali fund’ to operationalise the sharing of benefits from uses of digital sequence information (DSI);
  • decisions on Article 8(j), focused on traditional knowledge, innovations and practices of indigenous and local communities, including the adoption of a new Programme of Work on Article 8(j) and the establishment of a new permanent subsidiary body on Article 8(j);
  • a number of sectoral decisions, including one on the mechanism for identifying ecologically or biologically significant marine areas (EBSAs), which had been the subject of legal and political discussion for eight years.

The decisions related to Article 8(j) stand out considering the central role indigenous peoples and local communities play in the protection of biodiversity and the importance of including different epistemologies in biodiversity decision-making. During COP itself, there were arguments in favour and against the creation of such subsidiary body. Concerns revolved around questions such as ‘Why fixating on only one article of the CBD? Why a subsidiary body on this specific article and not others?’, ‘Would the subsidiary body silo indigenous peoples and local communities concerns?’, ‘Should indigenous peoples and local communities still be clustered together?’ Many counter-arguments were raised promoting the establishment of the subsidiary body as a way to legitimise and render more visible indigenous peoples and local communities’ practices turning these actors as policy makers instead of policy takers included in NBSAPs. The new subsidiary body’s modus operandi will be developed over the next two years, and it will be interesting to follow such development.

Outcomes are important, and in a goal and target-oriented environmental law world such as the one the CBD governance infrastructure presents, it is natural and logical to focus on what is achieved and what is not. However, the success of COP 16, like all COPs, should not solely be determined by its outcomes. It is essential to remember the spaces and the conversations that unfolded in between, the sharing of knowledge by a global community coming together for a few days from very different paths of life and with different agendas, a multitude unified by the shared concern of biodiversity loss, which continues at unprecedented rates and deserves everyone attention in COPs and beyond.

————————————–

This blog is written by Cabot Institute for the Environment member, Professor Margherita Pieraccini, Professor of Law at the University of Bristol Law School.

Margherita Pieraccini
Margherita Pieraccini

How glacier algae are challenging the way we think about evolution

Wirestock Creators/Shutterstock

People often underestimate tiny beings. But microscopic algal cells not only evolved to thrive in one of the most extreme habitats on Earth – glaciers – but are also shaping them.

With a team of scientists from the UK and Canada, we traced the evolution of purple algae back hundreds of millions of years and our findings challenge a key idea about how evolution works. Though small, these algae are having a dramatic effect on the glaciers they live on.

Glaciers are among the planet’s fastest changing ecosystems. During the summer melt season as liquid water forms on glaciers, blooms of purple algae darken the surface of the ice, accelerating the rate of melt. This fascinating adaptation to glaciers requires microscopic algae to control their growth and photosynthesis. This must be balanced with tolerance of extreme ice melt, temperature and light exposure.

Our study, published in New Phytologist, reveals how and when their adaptations to live in these extreme environments first evolved. We sequenced and analysed genome data of the glacier algae Ancylonema nordenskiöldii. Our results show that the purple colour of glacier algae, which acts like a sunscreen, was generated by new genes involved in pigment production.

This pigment, purpurogallin, protects algal cells from damage of ultraviolet (UV) and visible light. It is also linked with tolerance of low temperatures and desiccation, characteristic features of glacial environments. Our genetic analysis suggests that the evolution of this purple pigment was probably vital for several adaptations in glacier algae.

We also identified new genes that helped increase the algae’s tolerance to UV and visible light, important adaptations for living in a bright, exposed environment. Interestingly these were linked to increased light perception as well as improved mechanisms of repair to sun damage. This work reveals how algae are adapted to live on glaciers in the present day.

Next, we wanted to understand when this adaptation evolved in Earth’s deep history.

The evolution of glacier algae

Earth has experienced many fluctuations of colder and warmer climates. Across thousands and sometimes millions of years, global climates have changed slowly between glacial (cold) to interglacial (warm) periods.

One of the most dramatic cold periods was the Cryogenian, dating back to 720-635 million years ago, when Earth was almost entirely covered in snow and ice. So widespread were these glaciations, they are sometimes referred to by scientists as “Snowball Earth”.

Scientists think that these conditions would have been similar to the glaciers and ice sheets we see on Earth today. So we wondered could this period be the force driving the evolution of glacier algae?

After analysing genetic data and fossilised algae, we estimated that glacier algae evolved around 520-455 million years ago. This suggests that the evolution of glacier algae was not linked to the Snowball Earth environments of the Cryogenian.

As the origin of glacier algae is later than the Cryogenian, a more recent glacial period must have been the driver of glacial adaptations in algae. Scientists think there has continuously been glacial environments on Earth up to 60 million years ago.

We did, however, identify that the common ancestor of glacier algae and land plants evolved around the Cryogenian.

In February 2024, our previous analysis demonstrated that this ancient algae was multicellular. The group containing glacier algae lost the ability to create complex multicellular forms, possibly in response to the extreme environmental pressures of the Cryogenian.

Rather than becoming more complex, we have demonstrated that these algae became simple and persevered to the present day. This is an example of evolution by reducing complexity. It also contradicts the well-established “march of progress” hypothesis, the idea that organisms evolve into increasingly complex versions of their ancestors.

Our work showed that this loss of multicellularity was accompanied by a huge loss of genetic diversity. These lost genes were mainly linked to multicellular development. This is a signature of the evolution of their simple morphology from a more complex ancestor.

Over the last 700 million years, these algae have survived by being tiny, insulated from cold and protected from the Sun. These adaptations prepared them for life on glaciers in the present day.

So specialised is this adaptation, that only a handful of algae have evolved to live on glaciers. This is in contrast to the hundreds of algal species living on snow. Despite this, glacier algae have dramatic effects across vast ice fields when liquid water forms on glacier surfaces. In 2016, on the Greenland ice sheet, algal growth led to an additional 4,400–6,000 million tonnes of runoff.

Understanding these algae helps us appreciate their role in shaping fragile ecosystems.

Our study gives insight into the evolutionary journey of glacier algae from the deep past to the present. As we face a changing climate, understanding these microscopic organisms is key to predicting the future of Earth’s icy environments.The Conversation

————————–

This blog is written by Dr Alexander Bowles, Postdoctoral research associate, University of Bristol

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Alexander Bowles
Alexander Bowles

UK peatlands are being destroyed to grow mushrooms, lettuce and houseplants – here’s how to stop it

Peat is a natural carbon sink but is often found in house plants and other retail products, particularly within the food and farming industry.
New Africa/Shutterstock

During the long, solitary days of lockdown, I found solace in raising houseplants. Suddenly stuck at home, I had more time to perfect the watering routine of a fussy Swiss cheese plant, and lovingly train our devil’s ivy to delicately frame the bookcases.

But I started noticing that these plants, sourced online, often arrived in the post with a passport. Most had travelled from all over Europe, with one common tagline: contains peat.

As a peatland scientist, these labels instantly filled me with horror. Hidden Peat, a new campaign launched by The Wildlife Trusts, is now highlighting the presence of peat in all sorts of consumer products, including house plants.

Peatlands, such as bogs and fens, store more carbon than all of the world’s forests combined. They trap this carbon in the ground for centuries, preventing it from being released into the atmosphere as greenhouse gases that would further warm the climate.

Peatlands have multiple environmental benefits. They are havens for wildlife, providing habitat for wetland birds, insects and reptiles. They supply more than 70% of our drinking water and help protect our homes from flooding.

So why on earth is peat being ripped from these vital ecosystems and stuffed inside plant pots?

From sink to source

Despite their importance, peatlands have been systematically drained, farmed, dug up and sold over the last century. In the UK, only 1% of lowland peat remains in its natural state.

Instead of acting as a carbon sink, it has become one of the largest sources of greenhouse gas emissions in the UK’s land use sector. When waterlogged peat soils are drained, microbes decompose the plant material within it and that results in the release of greenhouse gases such as methane into the air.

Most of the peat excavated, bagged up and sold in the UK is used as a growing medium for plants. Gardeners have become increasingly aware of this problem. Peat-free alternatives have been gaining popularity and major retailers have been phasing out peat-based bagged compost in recent years.

Indeed, the UK government announced they would ban sales of all peat-based compost by 2024. But this legislation has not yet been written and it seems unlikely it will be enacted before the end of the current parliament.

Even if brought in to law, this ban would only stop the sales of peat-based bagged compost of the type you might pick up in the garden centre. Legislation for commercial growers is not expected until 2030 at the earliest. So the continued decimation of the UK’s peatlands could remain hidden in supply chains long after we stop spreading peat on our gardens.

Hide and seek peat

For consumers, it’s almost impossible to identify products that contain peat or use peat in their production. All large-scale commercial mushroom farming involves peat and it is used for growing most leafy salads. It gives that characteristic peaty aroma to whisky, and, as I found out, is a popular growing medium for potted plants.

But you’d struggle to find a peat-free lettuce in the supermarket. The Hidden Peat campaign asks consumers to call for clear labelling that would enable shoppers to more easily identify peat-containing products. Shoppers are also encouraged to demand transparency from retailers on their commitment to removing peat from their supply chains.

You can ask your local supermarket about how they plan to phase out peat from their produce. Some supermarkets are actively investing in new technologies for peat-free mushroom farming.

Make informed purchases by checking the labels on garden centre potted plants or source plants from peat-free nurseries. The Royal Horticultural Society lists more than 70 UK nurseries dedicated to peat-free growing.

You can write to your MP to support a ban on peat extraction and, crucially, the sale of peat and peat-containing products in the UK. That ensures that peat wouldn’t just get imported from other European countries.

Pilots and progress

The UK government recently announced £3.1m funding for pilot projects to rewet and preserve lowland peat, with peat restoration seen as a cornerstone of net zero ambitions. This campaign calls for further acceleration of peatland restoration across the UK.

As a research of the science behind peatland restoration, I see firsthand the enormous effort involved in this: the installation of dams to block old agricultural drainage ditches, the delicate management of water levels and painstaking monitoring of the peat wetness.

I spend a lot of time taking samples, monitoring the progress, feeding results back to the land managers. Like many other conservationists, I work hard to find ways to preserve these critical habitats.

But sometimes, there may be a digger in the adjacent field doing more damage in a day than we could undo in a lifetime. That’s the reality, and the insanity, of the UK’s current peatland policies.

We heavily invest in restoring peatlands, yet fail to ban its extraction – the one action that would have the most dramatic impact. By demanding that peat is not only eradicated from garden compost, but weeded out of our supply chains, we can keep peat in the ground, not in pots.

—————————-

This blog is written by Cabot Institute for the Environment member, Dr Casey Bryce, Senior Lecturer, School of Earth Sciences, University of Bristol.

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Casey Bryce
Casey Bryce