Cincinnati Museum Center and the Cincinnati Zoo Team Up to Evaluate Population Recovery of Cumberland Sandwort

By: Rachel Bridgens, Manager, 动物学 DNA Lab and Collections

试管个体…的试管个体 M. cumberlandensis 来自CREW的非原址藏品. 图片来源:辛辛那提动物园

An outplanting is a commonly used conservation technique used by land managers and conservation biologists to supplement natural populations of threatened or endangered plant species with new populations. These new populations often come from 非原位 collections which are plant individuals stored outside of the natural population in greenhouses, test tubes (micropropagation) or in seed banks. In 2005, scientists from the Cincinnati Zoo & Botanical Garden’s Center for Conservation and Research of Endangered Wildlife (CREW) used their 非原位 test tube 工厂收集 to produce a supplemental outplanting of the rare Cumberland Sandwort (Minuartia cumberlandensis). Cincinnati Museum Center has partnered with CREW to use genetics to measure the viability of the outplanting.

The Cumberland Sandwort is an herbaceous perennial known to occur exclusively in the Cumberland Plateau of southern Kentucky and northern Tennessee. This species produces flowers in late June through early August, 然而, 它也可以进行无性繁殖.

Rockhouses in Daniel Boone National Forest. 图片来源:Brian Stansberry

Rockhouses, abundantly found in the Cumberland Plateau, 提供阴凉, damp soil 这是 ideal for the growth of Cumberland Sandwort. 然而, these rockhouses are popular places for the excavation of Native American artifacts and rappelling which subject these plants to trampling. As a result, Cumberland sandwort was listed as a federally endangered species in 1988. This species was de-listed in 2021 due, 在某种程度上, to the presence of CREW’s thriving experimental outplanting. This outplanting was made up of individuals originally collected from the dwindling wild populations in Tennessee, 然而, there are concerns that it may lack genetic diversity, an important determinant of population health.

In 1999, CREW collected seeds from Tennessee’s wild population. These seeds were germinated and later initiated in tissue culture. Only seven of the germinated seeds survived tissue culture initiation and were stored in test tubes as a part of CREW’s 非原位 工厂收集.

In 2005, a total of 63 clones from the original seven test tube plants were used to initiate an experimental outplanting at Daniel Boone National Forest (DBNF) in Kentucky which maintains a similar habitat as the wild populations of Cumberland sandwort.

野生个体 M. cumberlandensis. 图片来源:Megan Philpott

To determine if an experimental outplanting is successful, there are a few key things to look for:

  1. The population has persisted for at least 10 years. 截至2015年, the population has grown to 200+ individuals including mature, 自然繁殖的成虫.
  2. The outplanting should contain at least 50 genetically distinct individuals. 在这种情况下, the outplanting was established with only seven genetically distinct individuals but has flourished regardless. The genetic diversity of the growing DBNF population must be measured to understand the viability of this claim.
  3. The new population mimics the genetic diversity of the founding population, 这是, the wild population originally collected in Tennessee. To determine if these populations are similarly genetically variable, 必须对多样性措施进行比较.

辛辛那提博物馆中心的DNA实验室. 图片来源:Heather Farrington

辛辛那提博物馆中心的DNA实验室 is collaborating with CREW’s plant lab division to investigate points 2 and 3 and determine the viability of the outplanting. The DNA Lab staff will genetically analyze tissue samples collected in 2013 from DBNF and the Tennessee wild population of Cumberland sandwort and compare their genetic diversity. These diversity measures will shed light on the importance of genetic variability as an indicator of population health and will drive further conservation efforts of this species and many other plants.

While we have made great strides in the conservation and restoration of Cumberland Sandwort, 最令人兴奋, 它将于2021年退市, there is still a lot of work to be done to maintain a self-sustaining population. The results of this project will help to inform those efforts moving forward.


This project will be completed 在某种程度上nership with the Center for Conservation and Research of Endangered Wildlife (CREW) with funding provided by Botanic Gardens Conservation International.

张贴在 动物学.