If it's big enough and leafy enough the birds will come

If it's big enough and leafy enough the birds will come
Fig 1. The New York City metropolitan area with the five boroughs of NYC shown in light gray. (a) The 1481 NYC green spaces considered in the analysis and (b) the predicted annual species richness at 102 NYC green spaces. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.) Credit: Frank La Sorte using eBird data and data from the NYC Planimetrics database through the NYC Department ofInformation Technology & Telecommunications (DoITT). The data were created in March 2019 and were last updated February 2019. Data weredownloaded the data from the NYC OpenData portal (https://data.cityofnewyork.us/).

A new study from the Cornell Lab of Ornithology highlights specific features of urban green spaces that support the greatest diversity of bird species. The findings were published today in the journal Landscape and Urban Planning.

The study focuses specifically on parks in New York City. It uses observations submitted to the eBird citizen-science database from 2002 through 2019 to estimate the variety of species found on an annual and seasonal basis.

Bottom line: the more available, the greater the diversity of birds. Models show that Increasing the area of green space by 50% would result in an 11.5% increase in annual and an 8.2% increase in seasonal species diversity.

Trees are also important, particularly for during spring when models show a 50% increase in canopy cover would result in a 23.3% increase in .

"Our findings emphasize the broad importance of area and the value of tree canopy cover for spring migrants," said lead author Frank La Sorte at the Cornell Lab. "It also shows that ecological data from citizen scientists can be useful in and management."


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More information: Frank A. La Sorte et al, Area is the primary correlate of annual and seasonal patterns of avian species richness in urban green spaces, Landscape and Urban Planning (2020). DOI: 10.1016/j.landurbplan.2020.103892
Provided by Cornell University
Citation: If it's big enough and leafy enough the birds will come (2020, July 21) retrieved 30 November 2020 from https://phys.org/news/2020-07-big-leafy-birds.html
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