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Researchers have just discovered the world\u2019s largest spider web, spanning over 1,140 square feet and home to over 110,000 spiders. Jenna El-Attar\/ Guest Artist<\/p>\nResearchers have just discovered the world\u2019s largest spider web, spanning over 1,140 square feet and home to over 110,000 spiders. Jenna El-Attar\/ Guest Artist<\/p>\n
Researchers have just discovered the world\u2019s largest spider web<\/a> \u2014 and no, it\u2019s not in Doherty. Located in Sulfur Cave along the Albania-Greece border, the web spans over 1,140 square feet and is home to over 110,000 spiders \u2014 including two species that were previously believed to be hostile to each other.\u00a0<\/p>\n First discovered in 2022, scientists believe that the cave formed over a millennium as sulfide-rich water gradually filtered through \u2014 and eventually dissolved \u2014 carbonate rock.\u00a0\u00a0<\/a><\/p>\n Rather than relying on organic material washing into the cave from the surface, sulfidic cave ecosystems are entirely dependent on chemoautotrophic bacteria.<\/a> These bacteria oxidize hydrogen sulfide \u2014 a colorless and toxic gas \u2014 to create energy, serving as the basis of the cave\u2019s food web.\u00a0<\/p>\n Furthermore, sulfidic caves are characterized by low oxygen flow, acidic pH levels, and hydrogen sulfide toxicity. Most life forms cannot withstand such hostile conditions, leading to a population primarily composed of endemic species adapted to survive in extreme environments. Yet, against all expectations, researchers found a massive, cooperative spider colony \u2014 a structure unlike anything previously recorded.\u00a0<\/a><\/p>\n In an effort to further understand this complex ecosystem, researchers at the University of Transylvania<\/a> manually collected spider specimens from the cave and taxonomically identified each species. They determined that five species were present \u2014 two associated with the colony (T. domestica and P. vagans) and three non-colony-associated (M. merianae, L. magnesiae, and K. eremita).\u00a0<\/p>\n It wouldn\u2019t be unusual to find T. domestica and P. vagans \u2014 common household spiders<\/a> \u2014 \u00a0in the corners and crevices of your basement or attic. Both species are preadapted for dark, stagnant environments. Still, researchers were surprised to find them nearly 160 feet from the cave\u2019s entrance \u2014 an area completely devoid of sunlight.\u00a0<\/p>\n Researchers accounted for this discrepancy through DNA barcoding. Each species had its DNA sampled, sequenced, and compared to publicly available databases.<\/a> L. magnesiae was excluded from this analysis due to a lack of available information. T. domestica and P. vagans were found to be genetically uniform, carrying a haplotype (a group of genetic markers typically inherited from one parent) that differed slightly from spiders of the same species found above ground. This indicates that the spiders likely originated from a single founding group that later became isolated from the external world. The other two species showed high genetic diversity, a characteristic of a mobile population that moves freely between the ground and surface.<\/a><\/p>\n Furthermore, this discovery marks one of the first recorded instances of\u00a0 T. domestica and P. vagans living together. Spiders are territorial \u2014 when in close proximity to each other, the larger one will often end up eating its smaller counterpart. The two species\u2019 peaceful coexistence can be attributed to a variety of factors.<\/p>\n First, scientists observed a large swarm of adult chironomid flies in the cave. <\/a>\u00a0The presence of an abundant, continuous food source means that the two species do not have to compete for a meal.\u00a0 Moreover, spiders suffer from notoriously bad eyesight<\/a>, leading some scientists to conclude that the two species may be entirely unaware of the other\u2019s existence.\u00a0<\/p>\n \u00a0Scientific interest in spider sociality can be traced back decades.<\/a> One species, the Anelosimus eximius<\/a>, notably creates large communal webs that house thousands of spiders. Together, these \u201csocial spiders\u201d raise young and capture prey more effectively than their solitary counterparts.\u00a0<\/p>\n However, it is important to recognize the interactions between T. Domestica and\u00a0 P. vagans are more cooperative than collaborative.\u00a0 Researchers also noted that T. domestica, with a population of over 69,000, acted as the primary \u201carchitect\u201d of the colony,<\/a> building and repairing the massive web.\u00a0 In contrast, the 42,000 P. vagans interacted with the web, but played no role in its construction.<\/a> Still, this structure resembles a dynamic that has only been observed in a fraction of the 50,000 known spider species.\u00a0<\/a><\/p>\n The discovery of this web presents new questions about the genetic and morphological underpinnings of interspecies interactions.\u00a0 More than anything, though, it serves as a potent reminder that even the most familiar of species can surprise us. Nature has a tendency to scorn the rigid, man-made classifications of behavior and biology. So if even the most socially volatile species can venture into new territory and forge mutual connections, perhaps there is hope for the average Carnegie Mellon student.\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"Researchers have just discovered the world\u2019s largest spider web, spanning over 1,140 square feet and home to over…\n","protected":false},"author":2,"featured_media":144599,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[61,60,82,263],"class_list":{"0":"post-144598","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-wildlife","8":"tag-ie","9":"tag-ireland","10":"tag-science","11":"tag-wildlife"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts\/144598","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/comments?post=144598"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts\/144598\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/media\/144599"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/media?parent=144598"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/categories?post=144598"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/tags?post=144598"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}