Invasive Species Play a Role in Species Extinction
The UN's Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES) has explored how invasive alien species contribute to species extinction. The report's findings are stark: Invasive alien species significantly threaten our natural environment, economy, food security, and health. They are a primary factor in 60% of animal and plant extinctions, leading to annual costs exceeding 423 billion US dollars.
Wednesday, September 20, 2023
IPBES's report emphasizes that the risks of invasive alien species have been gravely underestimated. In 2019, IPBES had already identified these species as one of the top five drivers of biodiversity loss. Building on this, they collaborated with 86 experts from 49 countries over four years to produce this comprehensive assessment, released in September 2023. Swiss media, including Watson and Blick, have covered this pressing issue.
Indigenous Communities Bear the Brunt
For Professor Helen Roy, one of the report's lead authors, invasive alien species are a formidable threat to biodiversity. They inflict irreversible harm on our natural world, resulting in both species extinction and human health threats. Only a subset of foreign species is deemed «invasive» - those causing detrimental effects. Specifically, 6% of alien plants, 22% of invertebrate alien animals, 14% of vertebrate alien animals, and 11% of alien microbes are classified as invasive. Indigenous communities, deeply rooted in their natural surroundings, face the direst consequences of these invasive species, leaving them susceptible to dramatic ecosystem alterations.
The Repercussions: Species Loss and Human Illnesses
IPBES underscores that 60% of extinction events are attributed to invasive alien species. They were the exclusive culprits in 16% of these instances. Over 218 invasive alien species account for more than 1,200 local extinctions. Instances of their impact include how North American beavers and Pacific oysters reshape ecosystems, often detrimentally affecting native species. The fallout from these invasions—ranging from agricultural losses and diseases to infrastructure damage—is financially burdensome. The Asian ladybug, introduced in Europe for pest control, has burgeoned, potentially displacing its native counterparts. These bugs are a nightmare for winegrowers: they often nest in grape clusters, and if harvested, they taint the wine.
Public health is jeopardized as well. Diseases like Malaria, Zika, and West Nile fever, propagated by invasive mosquito species such as Aedes albopictus and Aedes aegyptii, have surged. Ecosystem disruptions also damage human livelihoods. For instance, the introduction of water hyacinth (Pontederia crassipes), the foremost invasive alien species globally, has seen fish catches plummet in Lake Victoria.
Local biodiversity protection is a top priority on the international political agenda.
A key takeaway from the report, as highlighted by one author, is the attainability of significant strides against invasive alien species. A collaborative, multi-sectoral approach—spanning trade, transport, health, and economic development—is pivotal. The report proposes cohesive strategies and highlights over 40 areas demanding further research.
«The urgency presented by invasive alien species, causing profound harm to our environment and societies, underscores this report's significance,» says Dr. Anne Larigauderie, the Executive Secretary of IPBES. «Last year, global governments unified under the Kunming-Montreal Global Biodiversity Framework, committing to a 50% reduction in priority invasive alien species by 2030. While this goal is ambitious, the IPBES report equips us with the insights and tools to make this commitment a reality.»
Biodiversity and species diversity are pressing concerns that cannot be overlooked. These topics are intertwined with megatrends such as climate change, digital connectivity, urbanization, and ecological shifts. Everyone's awareness and proactive approach are as crucial as tangible efforts to counteract harmful organisms. While global discussions are essential, local actions are paramount, underscoring the need for a «glocal» approach.
Sources
Kindly note:
We, a non-native editorial team value clear and faultless communication. At times we have to prioritize speed over perfection, utilizing tools, that are still learning.
We are deepL sorry for any observed stylistic or spelling errors.
Related articles
Unwanted Invaders: Why Pesticides Are Essential in the Fight Against Invasive Species
They are small, highly mobile and extremely persistent: invasive species are spreading increasingly across Switzerland. Whether it is the Japanese beetle, the Asian hornet or newly discovered ant species, these unwelcome guests threaten not only native ecosystems, but also agriculture and residential areas. There is an urgent need for pesticides – including biocides and plant protection products – to combat these pests effectively.
Gene Drive Against Malaria: Blessing or Ecological Gamble?
Diseases such as malaria claim hundreds of thousands of lives every year. With so-called gene drive technology, scientists now have a tool that could theoretically eradicate the mosquitoes that spread these diseases. Yet the approach raises profound ethical and ecological questions.
The bottleneck of hunger: How the crisis in the Gulf is shaking global markets
While heating oil prices in Switzerland are on a rollercoaster, a far greater catastrophe is looming elsewhere. The blockage of the Strait of Hormuz is not only cutting off oil supplies, but also disrupting the global lifeline for fertilizers – with devastating consequences for global food security.
New genomic techniques in plants: what gene editing can do – and what it (still) cannot do
With CRISPR/Cas technology, genetic material can now be modified more precisely and efficiently than ever before. In plant breeding in particular, these “gene scissors” raise high hopes: crops that are resistant to diseases and pests, can withstand drought, and at the same time deliver higher yields. But how realistic are these expectations? What can genome editing actually achieve today – and what progress can we expect in the near future?