Black Death had dramatic effect on species diversity as humans abandoned farmland, study finds
Researchers have found that during the Black Death, when a third of the population of Europe was wiped out, biodiversity fell. Understanding their farming practices could help us increase diversity in modern agriculture.
The Black Death, a catastrophic pandemic that swept through Europe in the 14th century, had a profound impact on biodiversity, according to new research. As millions of people perished, humans abandoned vast stretches of farmland, leading to a significant decline in plant diversity in those abandoned agricultural areas. The study, published in the journal Ecology Letters, analyzed over 100 European pollen records and found that landscapes where cereal pollen (a key component of medieval agriculture) was absent experienced a 40% reduction in biodiversity.
As the population recovered and disturbances returned, biodiversity gradually increased, eventually surpassing pre-Black Death levels. This finding challenges the notion that human activity invariably leads to a loss of species and homogenization of landscapes, highlighting the complex relationship between humans and biodiversity.
Modern agriculture, characterized by monoculture practices, is known to reduce biodiversity, but historical evidence suggests that diverse land use practices, such as maintaining mosaics of natural features, often fostered greater plant diversity. The study underscores the importance of understanding how human interventions shape biodiversity over time and the potential for humans to actively manage landscapes while preserving ecosystem functions.
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