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Invasive Aliens


Synopsis


'The story of "invasive species" is really the story of human history, and Eatherley tells it with great verve … Fascinating' Daily Telegraph

A unique history of plant and animal invaders of the British isles spanning thousands of years of arrivals and escapes, as well as defences mounted and a look to the future.

As Brits we pride ourselves as stoic defenders, boasting a record of resistance dating back to 1066.

Yet, even a cursory examination of the natural world reveals that while interlopers of the human variety may have been kept at bay, our islands have been invaded, conquered and settled by an endless succession of animals, plants, fungi and other alien lifeforms that apparently belong elsewhere. Indeed it's often hard to work out what actually is native, and what is foreign.

From early settlement of our islands, through the Roman and mediaeval period, to the age of exploration and globalisation, today's complement of alien species tells a story about our past.

Dan Eatherley

Summary

Chapter 1: The Invasion

* Summary: Introduces the concept of invasive species, their origins, and the magnitude of the problem.
* Real-world example: The zebra mussel, an aquatic invertebrate native to Eurasia, has invaded North America and caused widespread ecological and economic damage.

Chapter 2: The Impacts

* Summary: Examines the diverse impacts that invasive species can have on native ecosystems, including habitat loss, competition for resources, disease transmission, and genetic dilution.
* Real-world example: The kudzu vine, a fast-growing plant native to Japan, has invaded the southeastern United States and smothered native vegetation, threatening wildlife and human infrastructure.

Chapter 3: The Causes

* Summary: Identifies the factors that contribute to the invasion and spread of non-native species, including habitat disruption, climate change, and human activity.
* Real-world example: The construction of the St. Lawrence Seaway provided a pathway for the sea lamprey, a parasitic fish, to invade the Great Lakes and devastate native fish populations.

Chapter 4: The Management

* Summary: Explores the various methods used to prevent, control, and eradicate invasive species, including quarantine, biological control, and habitat restoration.
* Real-world example: The release of sterile carp has been used to control the spread of the invasive grass carp in the Mississippi River Basin.

Chapter 5: The Future

* Summary: Discusses the challenges and opportunities for managing invasive species in the face of global change.
* Real-world example: The increased movement of goods and people around the world is expected to accelerate the arrival and spread of invasive species in the coming decades.

Chapter 6: The Policy

* Summary: Reviews the policy frameworks and regulations that govern the management of invasive species at local, national, and international levels.
* Real-world example: The Lacey Act in the United States prohibits the importation and trade of invasive species.

Chapter 7: The Economics

* Summary: Assesses the economic costs of invasive species and the potential benefits of their management.
* Real-world example: The U.S. National Invasive Species Council estimated that invasive species cost the U.S. economy over $120 billion per year in damages and lost productivity.

Chapter 8: The Education

* Summary: Emphasizes the importance of public education and outreach to raise awareness about invasive species and promote responsible behavior.
* Real-world example: The "Don't Let it Loose" campaign in the United States educates the public about the risks of releasing non-native pets and plants into the environment.

Chapter 9: The Hope

* Summary: Concludes with a message of hope and inspiration, highlighting the success stories and ongoing efforts to combat invasive species and protect native ecosystems.
* Real-world example: The collaboration between scientists, government agencies, and citizen groups has led to the successful eradication of invasive species like the New Zealand mudsnail in parts of the United States.