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Reading 2
Passage 1 These Invasive Species are Ruining the Retail Ecosystem
A. Invasive species often triumph as a result of good intentions gone wrong. Take Japanese knotweed (Fallopia japonica), introduced to Britain by enthusiastic Victorian gardeners who thought it an ornamental delight that doubled as cattle feed. But from just a scrap of root no bigger than a pea it could grow through tarmac, pavements, and brick walls. A century later, its spread is considered such a threat that planting or dumping knotweed is a crime, knotweed is so hated because it suffocates other plants, replacing them with an unproductive, leafy monotony. Then there is the Nile perch ( Lates niloticus), branded one of the world's worst invaders by conservationists. It is a freshwater fish that can grow to huge proportions. Again, with good intentions, it was introduced in 1954 to Lake Victoria, straddling Tanzania. Kenya, and Uganda. Since then, it has helped push over 200 well-established local fish species to extinction. Like the Nile perch, the cane toad (Bufo marinus) eats almost anything it gets its mouth around. Introduced for pest control, it turned out to be noisy, fast spreading, and a greater pest itself.
B. As it is in nature, so it is in the economy. Big superstores and chain retailers were allowed to spread by planners, town councils, and governments in awe of big business. But then it started to go wrong. The chains became the economic equivalent of invasive species: hungry, indiscriminate, often antisocial and destructive. When no one was paying much attention, the superstores and cloned shops grew to dominate and suffocate the economic ecosystem. They passed through planning regulations as easily as knotweed pushes through tarmac, devoured smaller and independent retailers with as much reflection as the Nile perch cleansing Lake Victoria of competition. They were often introduced to provide a specific service but outgrew their habitats until their cash till song could be heard on every street corner, forecourt, round about, and out of town shopping centre. Neither in balance, nor even a boom bust cycle with other similar, local species of shop; they began permanently to displace them.
C. Natural scientists use a whole new term to describe the current epoch of comprehensive. global human interference in ecosystems. Our time, they say, should be called the "Homogocene" to describe the way that distinctiveness and difference are being eroded. A combination of the creep of invasive species and habitats destroyed by development is driving a mass extinction. The World Conservation Union warns that such invasions are leading to the irretrievable loss of native biodiversity. Typical characteristics of an invasive species include the absence of predators, hardiness, and a generalist diet. Whatever the reason for their arrival and proliferation, invasive species tend to cause a disruption of the ecosystem that is catastrophic for native species.
D. The big, centralised logistical operations of the supermarkets are likewise driving the homogenisation of business, shopping, eating, farming, food, the landscape, the environment, and our daily lives. In the process, Britain is being sucked into a vortex of US-style, chain-store-led. clone retailing, both in towns and in soulless "big box" out-of-town shopping parks - what they call in the US, with its associated suburban sprawl, the "dead zone". They are spreading in the way "invasive species" spread in nature, lacking checks and balances, killing off diversity and "native" (in other words, local) species. Tesco is not the only guilty party (think of McDonald's. Starbucks, and Gap), but it is possibly the largest driving force. With around 2.000 stores in Britain, almost one third of the grocery market, and rapid international growth, city analysts believe the brand has the land and resources in place already to double its UK floor space. Can anything stop it?