A new study published in the open-access Biodiversity Data Journal suggests that spider webs – particularly those incorporating environmental debris – can serve as natural, non-destructive collectors of fungal material in agricultural ecosystems. The findings show that viable fungi can be recovered from these structures, including lineages that may represent previously undocumented diversity.
“Spider webs are often overlooked structures in the environment, yet they can function as natural collectors of biological material. Our findings suggest that they can be used as a complementary approach to access microbial communities without disturbing the surrounding ecosystem.”
Thanakron Into (Student at Thammasat University)
Researchers from Thammasat University and the National Center for Genetic Engineering and Biotechnology (BIOTEC), Thailand, investigated whether the adhesive and particle-trapping properties of spider silk could be used to capture and culture fungi associated with airborne and environmental particles. Unlike DNA-based methods, which detect genetic material regardless of viability, this approach allows for the recovery of living organisms that can be further studied.
The study focused on tropical rice fields, using webs of the orb-weaving spider Cyclosa mulmeinensis, a species known for constructing distinctive “trashline” decorations – linear accumulations of plant fragments, insect remains, and other debris within the web. These structures can intercept a variety of particles, some of which may carry fungal propagules.
Webs were collected from rice-field embankments in Pathum Thani, Nakhon Nayok, and Phetchaburi provinces using sterile techniques. In the laboratory, material retained on the silk was gently removed and cultured, yielding 112 viable fungal isolates. These isolates were grouped into 23 taxa across six genera, including Alternaria, Aspergillus, Cladosporium, Fusarium, Penicillium, and Talaromyces.
“We were particularly surprised that many of the fungi recovered from the webs remained viable and could be cultured. This enables further investigation beyond presence or absence, including their biological characteristics.”
Thanakron Into
Some genetic lineages – particularly within Cladosporium and Talaromyces – did not match currently described species in available databases, indicating that additional, undocumented diversity may be present in these systems.
Conventional approaches to fungal monitoring typically rely on soil, air, or plant sampling, or on molecular methods that may not distinguish between living and non-living material. In this context, spider webs may provide a useful supplementary sampling surface for capturing biologically relevant particles.
Because spider webs are naturally maintained and, in some species, periodically rebuilt, this method can be applied with minimal disturbance to both the organisms and their environment. Importantly, the spiders themselves were not harmed during sampling, as only small sections of the web were collected.
“The ability to recover living fungi from these naturally occurring structures adds a practical dimension to biodiversity studies. It provides a way to link environmental sampling with downstream biological work.”
Thanakron Into
The idea that something as familiar as a spider web could quietly capture a hidden layer of biodiversity highlights how much of the natural world remains overlooked in plain sight.
While further work is needed to evaluate how broadly this approach can be applied, the study demonstrates the potential of spider webs as an additional tool for exploring microbial diversity in agricultural landscapes.
Original source:
Into T, Petcharad B, Boonyuen N, Chanklan R, Pannanusorn S, Mongkolsamrit S, Kobmoo N, Nuankaew S, Kwanthong P (2026) Spider webs as reservoirs of culturable fungal diversity: evidence from orb-weaving Cyclosa mulmeinensis spider in Thai rice agroecosystems. Biodiversity Data Journal 14: e187035. https://doi.org/10.3897/BDJ.14.e187035
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