Dozens of the world’s largest natural history museums revealed
Thursday a survey of everything in their collections. The global inventory is
made up of 1.1 billion objects that range from dinosaur skulls to pollen grains
to mosquitoes.
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The survey’s organizers, who described the effort in the journal
Science, said they hoped the survey would help museums join forces to answer
pressing questions, such as how quickly species are becoming extinct and how
climate change is altering the natural world.
“It gives us intelligence now to start thinking about things
that museums can do together that we wouldn’t have conceived of before,” said
Kirk Johnson, director of the Smithsonian National Museum of Natural History in
Washington and one of the leaders of the project. “It’s the argument for
networking the global museum.”
A photo shows scientists examining plants stored
at the National Museum of Natural History in Washington.
Scientists had created smaller inventory databases before. But
the new effort, which included 73 museums in 28 countries, was unparalleled,
experts said.
“The analysis is at a global scale that no one else has
managed,” said Emily Meineke, an entomologist at the University of California,
Davis, who was not involved in the survey.
The survey revealed important gaps in the world’s collections.
Relatively few objects come from the regions around Earth’s poles, which are
especially vulnerable to the impact of global warming, for example. Insects,
the most diverse group of animal species, were also underrepresented.
Scientists had created smaller inventory databases before. But the new effort, which included 73 museums in 28 countries, was unparalleled.
Meineke said this survey of large institutions also laid the
groundwork for surveys of smaller ones, which might hold even more surprises.
“Once these methods are applied down the line to smaller collections, the
results are likely to give us a truer picture of biodiversity globally,” she
said.
Natural history museums got their start in the 1400s as cabinets
of wonders in which aristocrats kept precious oddities such as narwhal skulls
or glittering crystals. By the 19th century, they had become national
institutions that employed cadres of full-time curators.
When a museum gained a new object in those early days, curators
would typically scrawl down some basic information about it on a paper slip.
That slip might then get tucked into a box of pinned butterflies, or dropped
into a jar holding a preserved shark. Curators would then store the box or the
jar in a cabinet and make a note of it in a ledger.
A photo shows butterflies stored at the American
Museum of Natural History in New York. The labels included in their boxes are
not available to researchers online, making it difficult to study them.
Today, natural museums have amassed vast collections. The
Smithsonian Museum of Natural History alone holds 148,033,146 objects. In
recent years, some museums have been putting their objects online.
Last year, for example, the US National Herbarium finished
uploading photos of nearly 4 million pressed plants. But most objects in
natural history museums have yet to be scanned and uploaded to the cloud — or
even recorded in an online catalog.
With only a rough idea of what was in their own collections,
Johnson and fellow museum directors recognized that they had an even murkier
understanding of what they shared collectively.
“It occurred to us that we each hold these amazing assets, but
we don’t have a way to compare them,” he said. “We realized that we were
presiding over these kingdoms of dark data.”
A photo shows a collection of bird eggs at the
Field Museum in Chicago. Scientists studying this collection determined that
climate change is causing birds to lay their eggs earlier in the year.
Rather than wait for years until they had all digitized their
collections, the museum directors wanted to take stock now. They asked their
curators to fill out a survey describing what kind of collections they housed
in their museums — plants, fungi, fossils and so on. They then estimated how
big each collection was, sometimes simply by counting cabinets, and where
scientists had gone to collect the objects they contained.
The curators also provided the number of objects that had been
digitized, how many had been sampled for DNA and how many people had studied
different groups of species at each museum. The museums created an online
dashboard to explore the survey’s results.
The survey revealed important gaps in the world’s collections. Relatively few objects come from the regions around Earth’s poles, which are especially vulnerable to the impact of global warming, for example.
“This is the realization of a dream I and other people in my
role have had for many years,” said Michael Novacek, senior vice president of
science at the American Museum of Natural History in New York City.
Johnson said it was surprising just how many scientists study
mammals compared with other species. “The pull of the warm fuzzy things was
pretty apparent in the numbers,” he said.
By contrast, only 10 percent of the museum scientists studied
insects. “This is kind of a deficit,” Johnson said. “Insects are the biggest
component of terrestrial biodiversity, and also huge pollinators and vectors of
disease.”
Museums have done relatively little collecting in the Arctic or
Antarctica, two regions that are getting hit especially hard by global warming.
Novacek said it is important for museums to have a record of the diversity of
life there to understand how it is changing with rising temperatures. “It’s a
call to action,” he said.
Knowing what is missing from the world’s museums could help them
plan new expeditions that can fill in the gaps. “We might be able to make a
collecting plan for the 21st century,” Johnson said.
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