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Garden News

Historical Species & Ecosystems Study: LuEsther T. Mertz Library Collections

Posted in Garden News on December 5, 2019 by Garrett Barziloski

Esther Jackson is the Public Services Librarian at NYBG’s LuEsther T. Mertz Library.


Illustrations of mountains.
A work from Humboldt’s De distributione geographica plantarum…

Materials held in the LuEsther T. Mertz Library are extremely important resources for research related to climate change, especially those related to species distribution and rarity, and ecological topics. The study of distribution of species and ecosystems in geographic space and through geological time is known as biogeography, and research related to biogeography—both contemporary and historic is some of the most interesting and impactful work that is done with Mertz Library collections.

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Nurturing Nature’s Resilience: Thain Family Forest Program

Posted in Garden News on November 29, 2019 by Jessica Arcate Schuler

Jessica Arcate Schuler is the Director of the Thain Family Forest at The New York Botanical Garden.


Drone photo of the Thain Family ForestEcological restoration is the driving discipline for the ongoing work in the Thain Family Forest. This newer field of science is defined by the Society for Ecological Restoration (SER) as the process of assisting the recovery of an ecosystem that has been degraded, damaged, or destroyed. Ecosystems around the world are being used unsustainably and in some cases completely destroyed. Because of this, they are no longer providing vital ecosystem services such as food, water, carbon sequestration, pollination, climate regulation, and wildlife habitat. Ecological restoration provides the platform for people to utilize both conservation and sustainable development techniques to restore ecological function and improve conditions for everyone. The SER has developed international standards that guide restoration projects across the globe with an emphasis on educating and engaging local communities. Through the Forest Program, NYBG is a member of SER and also the Ecological Restoration Alliance of Botanic Gardens where our collaborative declaration is to “Connect. Share. Restore.”

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Pressed for Time: Herbaria & Environmental Threats Assessment

Posted in Garden News on November 20, 2019 by Barbara Thiers

Barbara M. Thiers, Ph.D., is the Vice President and Patricia K. Holmgren Director of the William and Lynda Steere Herbarium, and Curator of Bryophytes at The New York Botanical Garden.


Photo of an herbarium specimenHerbarium specimens are one of the very few tangible sources of information about how plants and fungi lived before industrialization, and during each successive period of technological advance since then. Through creative adaptation of technologies developed to address other questions, researchers today can glean information from herbarium specimens about an organism’s physiology, its reproduction, interaction with pollinators, predators and parasites, and the atmosphere around it, for example, the presence of pollutants in the soil and the chemical composition of the air.

Plants have small openings on the undersides of their leaves called stomates that allow Carbon Dioxide (CO2) to enter the leaf for the process of photosynthesis, and allow Oxygen (O2), a byproduct of photosynthesis, to enter to air. A variety of studies have demonstrated that leaves produce fewer of these stomates when CO2 concentrations in the air rise. Examination of stomates on herbarium specimens confirm other evidence that CO2 levels are rising, and help to correlate this rise with other types of climatic and human-mediated events. Assays of plant tissue from herbarium specimens can also help find previously unidentified sources of pollution. Herbarium specimens have been used to track historical levels of radiation and heavy metals to serve as a baseline for pre-pollution conditions, and to assess the reaction of a species to the presence of these compounds. These techniques were used to study long-term effects of known pollutions events, such as the Chernobyl nuclear disaster, or can be used to discover previously unknown contamination events.

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