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Changes in past landscapes can affect future bird biodiversity and lead to species extinction

A map of the continental United States showing the spatial distribution of each land cover change type included in the analysis. a to e, the data represent the magnitude and direction of changes in cities (a), forests (b), wetlands (c), grasslands (d) and farmlands (e) from 2001 to 2016 as percentage points. I am. Supplied from an open access NLCDCONUS product developed by USGS18. f, Total area of ​​negative and positive changes in each land cover covariate from 2001 to 2016 (km2). Credit: DOI: 10.1038 / s41559-021-01653-3

New statistical methods may lead to the arrival of bird communities and species that form new colonies, as past landscape changes cast a shadow over future bird biodiversity and are facing the impediment of species extinction. It suggests that there is.


Led by researchers at the University of Glasgow Nature Ecology and EvolutionReveals widespread extinction debt and colonization credits in US bird biodiversity. The team investigated the species diversity of the 2880 bird communities surveyed as part of the North American breeding bird survey to see how landscape changes are impacting. Bird seeds And their ability to survive in the future.

Researchers have developed a statistical model that quantifies the contribution of past and present landscapes to current biodiversity, explaining the history of recent landscape changes. These changes included the loss of grasslands and forests, and the acquisition of farmland and urban development.

Their analysis reveals a previously unknown range of bird species at risk in large parts of the United States. Overall, 52% of the study area was expected to lose bird seeds (extinction debt) and 48% of the land was expected to acquire seeds (colonization credits). Predicted species of debt was concentrated in metropolitan areas, but predicted colonization credits were primarily in the northeastern United States, along the Appalachian Mountains, and in uninhabited areas throughout the country. I was concentrating on.

Landscapes are constantly changing, often due to human activity and exploitation.When these changes occur, including wild species birdFaces two options. It’s about staying and adapting, or leaving one area and looking for a better habitat elsewhere. If neither is possible, it will be extinct locally.

Beyond the loss of some species, researchers believe that the creation of new landscapes may also provide opportunities for new, incoming species to thrive. However, it may take some time for new arrivals to effectively colonize the new landscape. Therefore, at any time and in any landscape, the ecosystem community can experience the debt of extinction of lost species and the credit of colonization of new species arriving.

Researchers have found that neglecting to consider such debts and credits can overestimate biodiversity. Landscape It can support up to 42% and underestimate up to 62% elsewhere. This is the fact that it can affect international biodiversity goals.

Yacob Haddou, lead author of research at the University of Glasgow, said: Biodiversity Omitting this important information is biodiversity Goals set by national and international policy plans run the risk of becoming obsolete even before they are implemented. “

Dr. Davide Dominoni, senior author of research at the University of Glasgow, said: Species diversity Is widespread in the United States, suggesting that species are expected to be lost or increased in many regions in the near future. Predicted species loss was strongly associated with urbanization.This is a lot, given that urbanization is expected to progress in the coming decades. Race It is on the verge of extinction. “

The study “Extensive Extinction Debt and Colonization Credits in the US Breeding Bird Community” Nature Ecology and Evolution..


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For more information:
Yacob Haddou et al, Extensive Extinction Debt and Colonization Credits in U.S. Breeding Bird Communities, Nature Ecology & Evolution (2022). DOI: 10.1038 / s41559-021-01653-3

Quote: Past landscape changes can affect future bird biodiversity and lead to species extinction (February 11, 2022).

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Changes in past landscapes can affect future bird biodiversity and lead to species extinction

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