The Academy of Natural Sciences holds an internationally important natural history collection. Currently, there are over 18 million biological specimens, and hundreds of thousands of volumes, journals,
illustrations, photographs, and archival items in its library. These collections were obtained through multiple means, including the donation or purchase of existing collections or individual items, the collection activities of Academy-sponsored expeditions, or those of individual scientists, whether or not they work at the Academy. Some collections were originally gathered by other institutions. For example, a number of the natural history collections at the American Philosophical Society were relocated to the Academy by the end of the 19th century. Traditionally, researchers at natural science (or natural history) institutions such as the Academy engaged in
biological taxonomy, the science of discovering, describing, naming, and classifying species. In recent decades, research has shifted in emphasis to the science of
systematics, the study of the evolutionary relationships among these species. The Academy preserves many
type specimens, the reference material that helps establish a species' identity. They also preserve additional specimens with which scientists can investigate the nature of these species, their relationships with other species, their evolutionary history, or their conservation status.
Museum collections and research programs met with scientists and purchased supplies in May 1803 before departing on the
Lewis and Clark Expedition The Academy's collections include a wide range of specimens across the tree of life. The museum also maintains several historically important collections.
Botany Botany is study of plants, including nonvascular
bryophytes (
mosses,
liverworts, and
hornworts) and vascular plants, including ferns, conifers and flowering plants. The field of botany has also traditionally included the study of
algae,
lichens, and
fungi which are now classified in different
biological kingdoms. Collections at the Academy, which are housed in the Philadelphia Herbarium (PH), the oldest institutional
herbarium in the New World, include some of the oldest and most important botanical collections in the Americas. Notable early collectors include
Benjamin Smith Barton,
Constatine Rafinesque,
Thomas Meehan,
Thomas Nuttall, and
Fredrick Pursh. The herbarium contains approximately 1.5 million specimens of
vascular plants,
fungi,
lichens,
algae, and
fossil plants, 40,000 of which are types. The department's current focus is plant biodiversity and evolution focusing on
Apocynaceae (milkweed or dogbane family) and
Polygalaceae. The herbarium contains many specimens contributed by notable collectors, a diversity of fossil diatoms, and diatoms collected as part of numerous freshwater environmental surveys in the United States. The Diatom Herbarium also provides collections and taxonomic services for the
Phycology Section of the Patrick Center for Environmental Research. Former curators of note include Charles S. Boyer,
Ruth Patrick, and Charles Reimer.
Entomology Entomology has been important to the Academy since its founding. Two of its earliest members include
Thomas Say, regarded as the father of American entomology, and
Titian Peale, a leading natural history illustrator and the chief naturalist on the
United States Exploring Expedition (1834–1842). The entomology collection currently contains more than 3.5 million specimens and includes the Titian Peale Moth and Butterfly Collection, the oldest entomology collection in the United States. Curator Emeritus,
Daniel Otte, an expert on
Orthoptera (crickets, grasshoppers, and their relatives) is a pioneer of presenting biological data on the internet through the creation of the Orthoptera Species File. Curator and Entomology Department Chair, Jon Gelhaus is a leading expert on
crane flies and manages the
Mongolian Aquatic Insect Survey.
Margaretta Morris, a former pupil of Say who was among the first women elected to the Academy and the
AAAS, conducted pioneering research on
Hessian flies,
periodical cicadas (first reported the 17-year cicada
Magicicada cassini),
diving beetles (cited in Darwin's
On The Origin of Species), and other agricultural pests.
Ichthyology Ichthyology has also been a part of Academy collections and research since its beginnings, but the size of the collection was relatively modest until acquisition of
Edward Drinker Cope's personal collections in 1898. A few years later,
Henry Weed Fowler began his tenure at the Academy, during which he systematized the collections and described 1,408 species. James E. Böhlke, William Saul, and William Smith-Vaniz are among the scientists who followed Fowler. Curator Emeritus, John Lundberg, an expert in
catfishes, pioneered deep channel collecting in large tropical rivers and is the lead author of a seminal scientific paper on the biological and
geographic history of the
Amazon River Basin. The Ichthyology collection, which currently houses nearly 1.2 million specimens and nearly 3,000 types, is one of the most important such collections in the United States. The department also hosts the All Catfish Species Inventory (a comprehensive online resource on catfish) and Catfish Bones (an online digital atlas of catfish morphology), and is a participant in Neodat II (an online resource of
Neotropic ichthyology collections).
Malacology Two of the early members of the Academy,
Thomas Say and
Isaac Lea, were
malacologists (see also
conchologists).
R. Tucker Abbott,
Samuel Stehman Haldeman,
Henry A. Pilsbry, and
George W. Tryon, Jr. were other noted malacologists who worked at the Academy. The Academy's malacology collection is the oldest such collection in the United States and is the 3rd largest in the world. It currently contains over 10 million specimens, including types erected by more than 400 authors. Curator
Gary Rosenberg, an expert on Jamaican land snails, is a leader in digitised museum collections and research data. Research websites include the Malacology Georeferencing Project an online database of Western Atlantic Marine Mollusca (Malacolog) , and the OBIS Indo-Pacific Mollusc database. Research associate and former curator Danielle Graf, an expert on
Unionidae (freshwater mussels), maintains the MUSSEL Project web site.
Ornithology The majority of ornithologists active in the United States during the first half of the 19th century, including
Charles Lucien Bonaparte,
George Ord,
Titian Ramsay Peale,
John James Audubon,
John Cassin,
Thomas Nuttall, and
John Kirk Townsend, were active members of the Academy. Later notable Academy ornithologists include
James Bond,
Frank Gill,
Rodolphe Meyer de Schauensee, Pete Myers, Fred Sheldon, and
Witmer Stone. With nearly 200,000 specimens representing over 9,000 species, the Ornithology collection is one of the largest and most taxonomically complete bird collections in the world. The
Delaware Valley Ornithological Club (DVOC) has held regular meetings at the Academy since 1890.
Vertebrate paleontology '' (with a human for scale) on display
Vertebrate paleontology in the United States originated in Philadelphia through the efforts of naturalists and scientists associated with the
American Philosophical Society (APS) during the first decade of the 19th century and at The Academy of Natural Sciences thereafter. By the end of the 19th century, the holdings from the APS, including the Thomas Jefferson Fossil Collection, had been transferred to the Academy for safekeeping. Currently, the collection contains more than 22,000 specimens, including many types.
Richard Harlan was an early member who introduced many American naturalists to the groundbreaking works of
Georges Cuvier. Joseph Leidy, who described
Hadrosaurus and alerted the scientific world to the paleontological treasures of the American West, is considered the "father" of American vertebrate paleontology.
Edward Drinker Cope, who also worked extensively on other vertebrates, is best known for his rivalry with
Othniel Charles Marsh during the infamous
Bone Wars. Curator
Edward B. Daeschler is currently studying the evolution of
Devonian tetrapods, but he will be retiring in September 2023. He is a co-discoverer of the transitional "fishapod"
Tiktaalik roseae from the Canadian Arctic and the discoverer of two tetrapods,
Hynerpeton and
Densignathus from the
Catskill Formation in Pennsylvania.
Other collections The Academy houses several collections of smaller size yet historical and scientific importance. The general
invertebrate collection contains about 22,600 specimens, while the
invertebrate paleontology collection contains about 105,000 lots. Both contain numerous type specimens. Generally, 21,500 specimens are gaunt, 13,500 are affiliated skins, and 1,700 are wet-preserved specimens. The Frank J. Myers Rotifer Collection is the most comprehensive collection of
rotifers on microslides. The
herpetology collection contains about 40,000 specimens, including more than 500 type specimens. The
mammalogy collection contains about 36,000 specimens and 180
holotypes. Among the naturalists and scientists associated with these collections are Timothy Conrad,
Edward Drinker Cope,
Richard Harlan,
John Edwards Holbrook,
William W. Jefferis,
Henry Charles Lea,
Isaac Lea,
Joseph Leidy,
Samuel George Morton, and
Thomas Say.
Patrick Center for Environmental Research Formerly the
Limnology Department, the Patrick Center for Environmental Research focuses on
applied ecology. Founded in 1947 by
Ruth Patrick, formerly of the
Diatom Herbarium, it was one of the earliest U.S. environmental consulting concerns. Its attachment to the Academy led it to become the first to employ
interdisciplinary teams of scientists to study
freshwater systems and the first to regard
biodiversity as a central criterion of
water quality. Its 1948 biological survey of the Conestoga River Basin in Pennsylvania, a milestone in
environmental research, led to similar surveys and studies throughout much of the United States. Characteristically, these earlier projects were joint projects of the Limnology Department and private industry. Since the rise of the
environmental movement in the 1960s and 1970s and the resulting increases in
governmental regulation of
water pollution, the environmental assessments pioneered at the Academy are increasingly conducted by private
environmental consulting firms. , much of the research at the Patrick Center is conducted with regulatory agencies and other governmental bodies, in fields such as diatom autecology,
environmental chemistry and
toxicology,
habitat restoration, long-term environmental trends, species conservation, and
watershed management. Some of the work employs most of the center's expertise and capabilities, such as recent studies on the
ecological effects of small dams or the ecological benefits of
riparian reforestation. Other studies may involve only one or a couple of the research programs. For example, a current project sampling
sediment cores in
tidal marshes throughout the
Delaware Estuary. This undertaking, possibly the most comprehensive core sampling in any estuary, relies extensively on the center's expertise in
biogeochemistry and
phycology. Once the sampling is completed, scientist will be able to investigate historical trends in marsh development,
carbon,
nitrogen and
phosphorus cycling,
water pollution, salinity variations, and
climatic change by analysing the core's sediments, chemistry, and diatom assemblages.
Biogeochemistry The
Biogeochemistry Section of the Patrick Center is concerned with the influence of aquatic organisms on the sources, fate and transport of
chemicals in aquatic systems. Studies frequently deal with the carbon and nutrient cycling as well as those of
trace elements (e.g., lead, copper, mercury, and zinc) and organic contaminants such as
polychlorinated biphenyls (PCBs), and
polycyclic aromatic hydrocarbons (PAHs). The section regularly provides water, sediment and tissue analyses for government, intergovernmental agencies, and private companies from around the country. In addition to the sediment core project mentioned above, it has recently studied the effects of small dams on sediment contaminants, photochemical transformation of marsh-derived
dissolved organic matter, and sedimentation and
eutrophication in
salt marshes.
Ecological Modeling The
Ecological Modeling Section employs sophisticated and rigorous mathematical modelling techniques to address a variety of questions in basic and applied research. Examples include
watershed-scale modeling and
risk assessment; nonlinear
population models structured by age, body size, or space; particle transport in
turbulent aquatic systems; and the ecology and control of
exotic invasive plants in urban parks.
Fisheries The Fisheries Section of the Patrick Center conducts research into the ecology,
conservation, and
management of
lotic and
estuarine fishes. Studies may range from the analysis of fish tissues for contaminants, monitoring fish populations for environmental assessments, to investigating the life histories of individual species. Recent and ongoing work include, glass eel (the larvae of freshwater or
American eels) recruitment in the Delaware River basin, the ecology and genetics of bridal shiner (a fish that's endangered in Pennsylvania), and the impacts of flow management (
dam releases) in the Upper
Delaware River to native and
introduced fish populations.
Macroinvertebrates Benthic macroinvertebrates (primarily
aquatic insects, crustaceans, and mollusks) are useful for biological monitoring programs. Their varied life spans, ranging from weeks to years, are long enough to reveal intermittent and continuous pollutants, yet short enough respond to worsening or improving water quality. The Macroinvertebrate Section at the Patrick Center has extensive experience in bioassessment, biomonitoring, and inventorying of freshwater habitats throughout the United States.
Phycology Because of their great diversity and specific ecological requirements,
algae, particularly
diatoms, make excellent
indicators of water quality. Moreover, diatoms are readily preserved in sediments, which make them useful organisms for studying
paleolimnology (the long-term trends of streams and lakes). The
Phycology Section of the Patrick Center provides algal analyses for governmental and other agencies interested in both assessing
water quality and long-term environmental trends. One such undertaking is the analyses of diatom assemblages in lake sediments (
sediment cores) throughout the eastern United States. This work, part of a large project managed by the
EPA, will try to establish reference (pre-
anthropogenic) conditions for lakes throughout the country. In addition to these research efforts, the Phycology Section of the Patrick Center has developed a set of online resources for using algae in environmental research. These include an algal image database, autecology datasets for freshwater algae, algae research with the
USGS National Water-Quality Assessment (NAWQA) program, and a diatom paleolimnology database.
Laboratory for Molecular Systematics and Ecology For most of its history,
biological taxonomy and
systematics were conducted using
comparative morphology. In recent decades, however, advances in
molecular biology and computational technologies have opened new possibilities for studying the diversity and history of life through the use of
cladistics and
computational phylogenetics. These technologies also offer new opportunities for molecular ecology and
conservation genetics. Academy scientists have been early adapters of molecular biology techniques.
Allozymes,
DNA-DNA hybridization,
immunoelectrophoresis, restriction site analyses of mitochondrial DNA and
serology were used extensively since the late 1960s. Recent molecular work mainly employs
DNA sequencing,
microsatellites, and AFLP (
amplified fragment length polymorphism). In 2004, the Laboratory for Molecular Systematics and Ecology (LMSE) was formed as a shared, multi-user facility to improve access to and provide training for the use of molecular data in systematic and ecological research. In addition to supporting staff, the lab offers research opportunities for students and post-doctoral fellowships.
Hovsgol The Academy's work in
Mongolia started with the realization of the unique research opportunities available at
Lake Hovsgol (Hovsgol Nuur). This large lake and its watershed were remarkably pristine and relatively unknown, especially in comparison to its sister lake in Russia,
Lake Baikal. In 1995, a multidisciplinary team of scientists from the Academy, as well as from other American institutions, Mongolia, Russia, and Japan started a multi-year study of the lake's
biodiversity,
limnology, and watershed. Although this research was scientifically rewarding, it was apparent that issues concerning environmental protection and
sustainable economic development needed addressing. Consequently, work at Hovsgol shifted to
ecosystem studies and
capacity building. One early undertaking was the enhancement of the operational and physical infrastructure at Hovsgol National Park. Long-term ecological monitoring of several
tributary watersheds began in 1997 and soon the site would be adopted into the International Long Term Ecological Research Network. Recent work at Hovsgol is focusing on the consequences of and sustainable responses to
climate change. The region lies in a transitional zone between the
semi-arid Eurasian
Steppe (grasslands) to the south and the Eurasian
Taiga (boreal forest) to the north. As such, it is an ideal mid-continental site at which to monitor the ecological effects of climate change. In addition, changes in livestock herding practices raise concerns about
overgrazing and
desertification. In response, the team at Hovsgol created and distributed a
Herder Handbook and continues to conduct research and work with nomadic herders to develop sustainable practices.
Mongolian Aquatic Insect Survey The Mongolian Aquatic Insect Survey is a multi-year
biodiversity survey,
environmental monitoring and
capacity building project managed by Jon Gelhaus of the Academy's
Entomology Department. A total of 217 sites from the
Selenge River Basin, the most populous and most extensive drainage in Mongolia, were surveyed from 2003 to 2006. Most of these sites are in rivers or streams, but some are in freshwater and saltwater lakes, hot and cold springs, and marsh wetlands. Additional sites from the remote drainage systems in western Mongolia will be sampled in 2008. The survey has yielded numerous new species and hundreds of geographic records for known
aquatic insects, provided an extensive dataset for ongoing environmental monitoring, and has helped develop research and technical infrastructures in Mongolia. This capacity building includes, in collaboration with the Institute of Meteorology and Hydrology, the building of the first research laboratory in Mongolia dedicated to the study of aquatic invertebrates. It also includes training of Mongolian scientists and students.
Center for Environmental Policy The Center for Environmental Policy informs and engages various constituents, promotes solutions, and builds public and professional awareness on important environmental topics. Much of its activities focus on public programs and working groups. The center hosts or participates in a number of public programs that are free and open to the public. Urban Sustainability Forums feature panels of local and national experts discussing environmental and sustainability topics as they relate to the Philadelphia region. Town Square, which may feature a panel or an individual, addresses a variety of topics relating to the environment or public science. The center also hosts candidate forums, conferences and workshops. The center acts as a logistical hub for a number of Working Groups organized around sustainability issues. Currently active groups include one for condominium and building co-op owners, a network of faith-based environmental groups, and a forum of senior executives in the private sector.
Ewell Sale Stewart Library The Library and Archives were established at the Academy's founding meeting in 1812 for the purpose of supporting its natural science research. The library provides online access, services, collections, imaging, and shared resources with other libraries. The library houses nearly 200,000 volumes ranging from works published in the 16th century to current journals and books. Its holdings also include illustrated works from as early as the 15th century, including
Konrad Gessner's Historia animalium,
Maria Sibylla Merian's
Insects of Surinam,
Edward Lear's
Psittacidae or Parrots, and a double elephant folio of
John James Audubon's
The Birds of America.
Scientific publications The
Journal of the Academy of Natural Sciences was the first peer-reviewed publication in the United States devoted to the natural sciences. The first volume was published in 1817. By 1842, it had been superseded by the
Proceedings of the Academy of Natural Sciences. The
Proceedings have been published continuously since 1841. The
Journal was reborn in 1847 as a larger-format publication that could accommodate longer articles and
monographs. The last volume was issued in 1918. The Academy publishes three other series. The occasional series
Notulae Naturae began in 1939 as a means to quickly publish short items, usually not longer than 16 pages on subject areas such as zoology, botany, ecology, geology and paleontology. The
Monographs series, which began in 1935, is composed principally of larger systematic reviews of selected taxonomic groups. The
Special Publications series, begun in 1922, includes works such as biography, taxonomy, historical reviews, and collections surveys.
VIREO VIREO (VIsual REsource for
Ornithology) is the most comprehensive collection of bird
images in the world. Started in 1979, the collection contains over 180,000 photographs representing over 7,300 species. The collection contains work by some of the world's most talented photographers. VIREO licenses bird images for a wide variety of commercial and non-profit uses. ==Exhibits and public programs==