20,000 BCE - 2025 CE
Fulfilling its legacy as the Garden State, New Jersey’s ecological history has been uniquely shaped by agriculture and the enduring influence of industrialization on its land. European discovery of abundant natural resources in the state rapidly led to trade booms in beaver pelts, oysters, and lumber, eclipsing early sustainable Lenape harvesting practices. Relentless hunting and deforestation inflicted irrevocable damage on predators and plant species, while the rise of urbanization shrunk habitats across the state. Nonetheless, New Jersey stands out for its remarkable diversity of landscapes, spanning the coastal estuary of the Delaware Bay, the wetland ecosystem of the NYC-adjacent Meadowlands, and the forested expanse of the Pine Barrens. With the gradual introduction of state environmental protections in the 20th century, previously threatened or extirpated species such as the bald eagle and bobcat made a successful return.
Despite making noteworthy strides in environmental conservation, New Jersey’s path to becoming the most densely populated state has been plagued by a history of waste production and pollution, earning it a second identity as the Garbage State. At its peak, New Jersey was home to over 400 landfills, many of which leached toxic chemicals into ecologically important wetlands and waterways, harming both wild and human life. Natural processes threaten the state’s biodiversity, primarily in the form of climate change, while rising water levels and increasingly destructive storms continue to erode the shoreline. Rapidly warming temperatures are further reducing the amount of available habitats for the state’s most endangered species, as seen with the bog turtle. Situated in the most metropolitan region of the U.S., efforts to conserve New Jersey’s distinctive environments and species become increasingly crucial as humanity continues to exploit the natural resources of our planet.
This timeline was compiled by Princeton University undergraduates Haeon Lee and Keylan Howard, with Ecosystem Sciences Librarian Maria Kochis, during a summer internship with the High Meadows Environmental Institute, in conjunction with the inaugural exhibit in the HMEI Gallery for Environmental Art - What Is Missing? What If? .
Sources: Herbert C. Kraft, The Lenape: Archaeology, History, and Ethnography (Newark: New Jersey Historical Society, 1986), 199. | Alison E. Mitchell, The New Jersey Highlands: Treasures at Risk (New Jersey Conservation Foundation, 1992), 2. | David Wheeler, Wild New Jersey: Nature Adventures in the Garden State (Rivergate Books, 2011), 1. | Steven Rodas, “The Garbage State,” NJ.com (New Jersey, August 14, 2025). https://www.nj.com/atlantic/2025/08/the-garbage-state.html. | Bob Narus, “Environment,” The New York Times (New York, February 9, 1986). https://www.nytimes.com/1986/02/09/nyregion/environment.html. | Andrew Bossone and Maura Barrett, “Ghost forests creep up U.S. East Coast,” NBC News (New York, September 21, 2021). https://www.nbcnews.com/science/environment/ghost-forests-creep-us-east-coast-rcna2142. | Michael W. Klemens, Turtle Conservation (Smithsonian Institution Press, 2000), 172.
Image source: Newark-New Jersey 1916. Map by Landis, T. J. Shepherd. Perspective map not drawn to scale. Bird's-eye-view. LC Panoramic maps (2nd ed.), 523. Public Domain.

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