• UCSBgauchos twitter avatar
    .@UCSBMensSoccer topped Sacramento State 2-1 behind two goals from Rodney Michael! Read about it here...… https://t.co/6eDjXt5yNP
    9 hours 35 min ago
  • ucsantabarbara twitter avatar
    We're in excellent company on this list of universities with the most #NobelPrize recipients since 2000. https://t.co/10KWyVhmm4
    9 hours 57 min ago
  • UCSB_GradPost twitter avatar
    Non-Traditional Student Center hiring graduate assistant https://t.co/SD1tgi42c0 #UCSB #ucsbgradpost
    11 hours 59 min ago
  • UCSB_GradPost twitter avatar
    People, Prosperity, and the Planet (P3) Student Design Competition https://t.co/zTCwcQpqmn #UCSB #ucsbgradpost
    11 hours 59 min ago
  • UCSB_GradPost twitter avatar
    ACCESSLEX Institute/AIR Research and Dissertation Fellows Program https://t.co/1EouHixeC4 #UCSB #ucsbgradpost
    11 hours 59 min ago
  • ucsantabarbara twitter avatar
    #UCSB astronomers helped co-discover a #kilonova for the first time in history. https://t.co/BJDEI640nd
    13 hours 51 min ago
  • UCSB_GradPost twitter avatar
    October 27 panel on unpacking identity in the academy https://t.co/6n9AxUxUzd #UCSB #ucsbgradpost
    15 hours 46 min ago
  • ArtsandLectures twitter avatar
    RT @_JoeyAlexander: Happy birthday to my hero, Mr. @wyntonmarsalis – I wish him all the best today! Here's my version of his tune w/ Larry…
    15 hours 48 min ago
  • ArtsandLectures twitter avatar
    Love seeing Telluride @Mountainfilm on tour at La Cumbre Jr High for an education outreach event before tonight's p… https://t.co/2qfFEaDIfV
    15 hours 48 min ago

Cities Support More Native Biodiversity Than Previously Thought

Researchers at NCEAS compile the largest global dataset of urban birds and plants, which shows world’s cities retain a unique natural palette
Wednesday, February 12, 2014 - 08:30
Santa Barbara, CA

The rapid conversion of natural lands to cement-dominated urban centers is causing great losses in biodiversity. Yet, according to a new study involving 147 cities worldwide, surprisingly high numbers of plant and animal species persist and even flourish in urban environments — to the tune of hundreds of bird species and thousands of plant species in a single city.

Contrary to conventional wisdom that cities are a wasteland for biodiversity, the study found that while a few species — such as pigeons and annual meadow grass — are shared across cities, overall the mix of species in cities reflects the unique biotic heritage of their geographic location. The findings of the study conducted by a working group at UC Santa Barbara’s National Center for Ecological Analysis and Synthesis (NCEAS) and funded by the National Science Foundation were published today in the Proceedings of the Royal Society B.

“While urbanization has caused cities to lose large numbers of plants and animals, the good news is that cities still retain endemic native species, which opens the door for new policies on regional and global biodiversity conservation,” said lead author and NCEAS working group member Myla F. J. Aronson, a research scientist in the Department of Ecology, Evolution and Natural Resources at Rutgers, The State University of New Jersey.

The study highlights the value of green space in cities, which have become important refuges for native species and migrating wildlife. This phenomenon has been named the Central Park Effect because of the surprisingly large number of species found in New York’s Central Park, a relatively small island of green within a metropolis.

Unlike previous urban biodiversity research, this study looks beyond the local impacts of urbanization and considers overall impacts on global biodiversity. The research team created the largest global dataset to date of two diverse taxa in cities: birds (54 cities) and plants (110 cities).

Findings show that many plant and animal species, including threatened and endangered species, can flourish in cities, even as others decline or disappear entirely. Cities with more natural habitats support more bird and plant species and experience less loss in species as the city grows. Overall, cities supported far fewer species (about 92 percent less for birds and 75 percent less for native plants) than expected for similar areas of undeveloped land.

“We do pay a steep price in biodiversity as urbanization expands,” said coauthor Frank La Sorte, a research associate at the Cornell Lab of Ornithology. “But even though areas that have been urbanized have far fewer species, we found that those areas retain a unique regional flavor. That uniqueness is something that people can take pride in retaining and rebuilding.”

Conserving green spaces, restoring native plant species and adding biodiversity-friendly habitats within urban landscapes could, in turn, support more bird and plant species. “It is true that cities have already lost a substantial proportion of their region’s biodiversity,” said Madhusudan Katti, a faculty member in the Department of Biology at California State University, Fresno. “This can be a cup half-full or half-empty scenario. If we act now and rethink the design of our urban landscapes, cities can play a major role in conserving the remaining native plant and animal species and help bring back more of them.”

The human experience is increasingly defined within an urban context, the authors noted. They maintain it is still possible for a connection to the natural world to persist in an urban setting, but it will require planning, conservation and education.

“Given that the majority of people now live in cities, this group’s synthesis of data on plant and urban plant and animal diversity should be of broad interest to ecologists as well as urban and landscape planners,” said Frank Davis, NCEAS director.

Contact Info: 

Julie Cohen
julie.cohen@ucsb.edu
(805) 893-7220