Everyone knows Lula Lake Land Trust is famous for its namesake lake and the majestic waterfall where the public can hike on select open dates. However, there is a lot going on behind the scenes. Lula Lake partners with many universities and researchers in a quest to learn more about our lands and the best methods of conservation. Two of those partners, naturalist Alan Cressler from Atlanta and Professor Kirk Zigler from the University of the South, helped identify something exciting at Lula Lake!
Their recent discovery of a new spider species adds to the fascinating group of Nesticus spiders. Roughly 30 species have been documented across the southern Appalachian region, a landscape well known for its rich biological diversity and extensive cave systems. These spiders exhibit a remarkable range of adaptations: Some live on the surface and retain the full complement of eight functional eyes, while others have evolved to spend their entire lives underground, losing their eyesight over generations as they adapt to perpetual darkness.
Named Nesticus lula in honor of Lula Lake, this new species was discovered by Cressler in a cave on the property of the Lula Lake Land Trust, and it has been formally identified with Zigler. At present, the species is known from only two locations - its original discovery site within Lula Lake and a second cave situated just a few miles away. In keeping with its cave-restricted lifestyle, Nesticus lula possesses only six eyes, a reduction from the eight typically found in surface-dwelling spiders. This reduced eye count is a common evolutionary response among organisms that inhabit lightless environments, where eyesight offers little benefit.
Several other members of the genus also inhabit caves in the broader region. Nesticus georgia is found in multiple caves in Lookout Valley, including the well-known Sitton’s Cave in Cloudland Canyon State Park. Nesticus furtivus occupies two caves on Raccoon Mountain, among them the popular Raccoon Mountain Caverns. Another species, Nesticus cressleri, occurs in several caves on Pigeon Mountain. Together, these species highlight the high degree of specialization and endemism characteristic of Appalachian cave ecosystems.
Because cave-adapted spiders often have extremely limited distributions - sometimes confined to one or only a handful of caves - they tend to be highly vulnerable to environmental disturbance. Their restricted range, slow population growth, and sensitivity to changes in humidity, temperature, or human activity make them important indicators of the overall health of subterranean habitats. For Nesticus lula, the fact that one of its two known populations exists on land managed specifically for conservation and biodiversity is especially encouraging. The stewardship efforts of Lula Lake Land Trust play a critical role in safeguarding delicate cave environments, increasing the likelihood that this exceedingly rare species will persist far into the future.
by Lula Lake Staff
Their recent discovery of a new spider species adds to the fascinating group of Nesticus spiders. Roughly 30 species have been documented across the southern Appalachian region, a landscape well known for its rich biological diversity and extensive cave systems. These spiders exhibit a remarkable range of adaptations: Some live on the surface and retain the full complement of eight functional eyes, while others have evolved to spend their entire lives underground, losing their eyesight over generations as they adapt to perpetual darkness.
Named Nesticus lula in honor of Lula Lake, this new species was discovered by Cressler in a cave on the property of the Lula Lake Land Trust, and it has been formally identified with Zigler. At present, the species is known from only two locations - its original discovery site within Lula Lake and a second cave situated just a few miles away. In keeping with its cave-restricted lifestyle, Nesticus lula possesses only six eyes, a reduction from the eight typically found in surface-dwelling spiders. This reduced eye count is a common evolutionary response among organisms that inhabit lightless environments, where eyesight offers little benefit.
Several other members of the genus also inhabit caves in the broader region. Nesticus georgia is found in multiple caves in Lookout Valley, including the well-known Sitton’s Cave in Cloudland Canyon State Park. Nesticus furtivus occupies two caves on Raccoon Mountain, among them the popular Raccoon Mountain Caverns. Another species, Nesticus cressleri, occurs in several caves on Pigeon Mountain. Together, these species highlight the high degree of specialization and endemism characteristic of Appalachian cave ecosystems.
Because cave-adapted spiders often have extremely limited distributions - sometimes confined to one or only a handful of caves - they tend to be highly vulnerable to environmental disturbance. Their restricted range, slow population growth, and sensitivity to changes in humidity, temperature, or human activity make them important indicators of the overall health of subterranean habitats. For Nesticus lula, the fact that one of its two known populations exists on land managed specifically for conservation and biodiversity is especially encouraging. The stewardship efforts of Lula Lake Land Trust play a critical role in safeguarding delicate cave environments, increasing the likelihood that this exceedingly rare species will persist far into the future.
by Lula Lake Staff
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