A 4-year study of invasive and native spider populations in Maine

Jakob, Elizabeth M.; Porter, Adam H.; Ginsberg, Howard S.; Bednarski, Julie V.; Houser, Jeremy D.

doi:10.1139/z11-050

Cited by 14 publications

(6 citation statements)

References 32 publications

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“…Invasive spiders can negatively impact native arthropod communities in many ways. For example, the presence of invasive Linyphia triangularis led to reduced densities of native spiders (Jakob et al., 2011), increased web abandonment and web building of the native Frontinella communis , and web takeovers of F. communis in Maine, United States (Bednarski et al., 2010). Candy‐striped spiders ( Enoplognatha ovata and E. latimana ) are known to disproportionately prey on pollinators, even actively hunting prey during pre‐dawn periods when insects are typically lethargic (Scott & McCann, 2023).…”

Section: Discussionmentioning

confidence: 99%

Veni, vidi, vici? Future spread and ecological impacts of a rapidly expanding invasive predator population

Nelsen,

Corbit,

Chuang

et al. 2023

Ecology and Evolution

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Economic and ecological consequences of invasive species make biological invasions an influential driver of global change. Monitoring the spread and impacts of non‐native species is essential, but often difficult, especially during the initial stages of invasion. The Jorō spider, Trichonephila clavata (L. Koch, 1878, Araneae: Nephilidae), is a large‐bodied orb weaver native to Asia, likely introduced to northern Georgia, U.S. around 2010. We investigated the nascent invasion of T. clavata by constructing species distribution models (SDMs) from crowd‐sourced data to compare the climate T. clavata experiences in its native range to its introduced range. We found evidence that the climate of T. clavata's native range differs significantly from its introduced range. Species distribution models trained with observations from its native range predict that the most suitable habitats in North America occur north of its current introduced range. Consistent with SDM predictions, T. clavata appears to be spreading faster to the north than to the south. Lastly, we conducted surveys to investigate potential ecological impacts of T. clavata on the diversity of native orb weaving spiders. Importantly, Trichonephila clavata was the most common and abundant species observed in the survey, and was numerically dominant at half of the sites it was present in. Our models also suggest that there is lower native orb weaver species richness and diversity closer to where T. clavata was initially found and where it has been established the longest, though human population density complicates this finding. This early study is the first to forecast how widely this spider may spread in its introduced range and explore its potential ecological impacts. Our results add evidence that T. clavata is an invasive species and deserves much more ecological scrutiny.

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Section: Discussionmentioning

confidence: 99%

Veni, vidi, vici? Future spread and ecological impacts of a rapidly expanding invasive predator population

Nelsen,

Corbit,

Chuang

et al. 2023

Ecology and Evolution

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show abstract

“…Invasive spiders can negatively impact native arthropod communities in many ways. For example, the presence of invasive Linyphia triangularis led to reduced densities of native spiders (Jakob et al 2011), increased web abandonment and web building of the native Frontinella communis, and web takeovers of F. communis in Maine, U.S. (Bednarski et al 2010). Candy-striped spiders (Enoplognatha ovata and E. latimana) are known to disproportionately prey on pollinators, even actively hunting prey during pre-dawn periods when insects are typically lethargic (Scott and McCann 2023).…”

Section: Impact Of T Clavata On Native Orb Weaving Spidersmentioning

confidence: 99%

“…Trichonephila clavata's large size may facilitate detection, which can aid monitoring its ecological impacts as it spreads, despite the relative recency of invasion. Although invasive spiders have historically received little attention, case studies have demonstrated the ability of certain invasive spider species to compete with, displace, and prey on native spiders (Bednarski et al 2010;Houser et al 2014;Nyffeler et al 1986;Coticchio et al 2023) which can shift spider community composition (Jakob et al 2011). Trichonephila clavata has been observed in locally high abundances, which may limit available web spaces for native orb weavers.…”

mentioning

confidence: 99%

Veni, vidi, vici? Future spread and ecological impacts of a rapidly-expanding invasive predator population

Nelsen

Corbit

Chuang

et al. 2023

Preprint

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Economic and ecological consequences of invasive species make biological invasions an influential driver of global change. Monitoring the spread and impacts of non-native species is essential, but often difficult, especially during the initial stages of invasion. The Joro spider, Trichonephila clavata (L. Koch, 1878, Araneae: Araneidae), is a large-bodied orb weaver native to Asia, likely introduced to northern Georgia, U.S. around 2010. We investigated the nascent invasion of T. clavata by constructing species distribution models (SDMs) from crowdsourced data to compare the climate T. clavata experiences in its native range to its introduced range. We found evidence that the climate of T. clavata's native range differs significantly from its introduced range and that the most similar climate in North America to its native range is to the north of its current introduced range. We then compared the SDM predictions to current observations of spread. Consistent with predictions, T. clavata appears to be spreading faster to the north than to the south. Lastly, we conducted surveys to investigate potential ecological impacts of T. clavata on the diversity of native orb weaving spiders. Importantly, Trichonephila clavata was the most common and abundant species observed in the survey, and was numerically dominant at half of the sites it was present in. Our models also suggest that there is lower native orb weaver species richness and diversity closer to where T. clavata was initially found and where it has been established the longest, though human population density complicates this finding. This early study is the first to forecast how widely this spider may spread in its introduced range and explore potential ecological impacts of T. clavata, and we call for continued investigation of this invasion's effects.

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“…In fact, taking orb-weaving spiders as an example, evidences suggest that communities are mainly niche partitioning structured (Shulov and Weissman 1959;Enders 1974;Olive 1980;Brown 1981;Horton and Wise 1983;McReynolds and Polis 1987;Ward and Lubin 1992;Herberstein 1998;Harwood and Obrycki 2005;Richardson and Hanks 2009;Novak et al 2010;Butt and Tahir 2010;Tahir et al 2012;Afzal et al 2013;Michalko and Pekár 2014). Despite the absence of widespread strong interspecific competition evidences in spiders, other authors suggest that this interaction may be considered a determinant factor of spatial distribution patterns, population abundance and species evolution (Spiller 1984 a, b;Nyffeler et al 1986;Polis et al 1989;Hann 1990;Jakob et al 2011;Lewis 2013;.…”

Section: Introductionmentioning

confidence: 99%

“…Seminal studies present contrasting conclusions. Concerning web-building spiders, some suggested that it constitutes an underlying process in the structuration of spider communities (Spiller 1984 a,b;Nyffeler et al, 1986;Polis et al, 1989;Hann, 1990;Jakob et al, 2011;Lewis, 2013;, while others advocate that it is weak or even absent (Wise, 1981;Riechert & Cady, 1983;Horton & Wise, 1983;Wise, 1984;Hoffmaster, 1985;. Putting aside this ambiguity, if the mechanism does commonly occur, it would very likely influence spider growth rates, reproductive output and spatio-temporal distribution.…”

Section: Introductionmentioning

confidence: 99%

Segregação espacial horizontal em pequena escala entre duas espécies da família Theridiidae (Araneae)

Cardoso¹

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Niche theory predicts that coexistence between related species occurring simpatrically is unlikely. Due to the shared phylogenetically conserved ecological attributes, the stronger competitor may exclude competitively the related heterospecific. However, coexistence mechanisms may allow similar species to persist together. In this study, we investigated the coexistence between two related theridiid spider species: Helvivis longicauda and Chrysso intervales. Along riparian habitats of a tropical forest, H. longicauda occurs close to river margins, while C. intervales occurs in higher abundance in further regions, after the zone occupied by H. longicauda, but always in shaded, humid regions. In this sense, this study aimed to investigate this fine-scale horizontal segregation pattern, exploring the relative contribution of different factors in generating the arrangement. Our results confirmed spatial segregation between spider species in both summer and winter, with H. longicauda populations being restricted to river margins and C. intervales to contiguous regions. These species were positively related to the abundance of suitable sites used for web-building and negatively to the relative abundance of fern leaves, which seem to be unsuitable sites. Apparently, spiders also present niche differentiation in the height they build webs, with C. intervales occurring at lower average heights. Helvibis longicauda was the only one infested by fungi and the mortality rates were higher during winter. At this time, we found more C. intervales individuals occupying areas close to the river than we did in summer. Helvibis longicauda trophic niche breadth was wider than that of the heterospecific. However, we did not found differences in prey abundance across distinct distances from the river. Only the temperature was different, increasing away from the river. There were no differences in establishment rates between species in both environments. However, it is still possible that H. longicauda success far from the margins is lower during summer, once transplant experiments were performed during winter, in which temperature did 2 not differ between species zones. Helvibis longicauda was the most common species colonizing potential web-building sites at marginal regions, while C. intervales colonizers were found mainly in areas further away. Agonistic interactions demonstrated that resident spiders present advantage in both intra and interspecific contests, once they remained alone in the web in most contests. Resident spiders effectively defended the web even against larger intruders. However, much larger intruders presented an increase in the probability of remaining in the alien web, sometimes taking it over. Although C. intervales average body mass is higher than that of H. longicauda, this difference seems to represent no effect in C. intervales reaching marginal regions. We hypothesized that capture rates of H. longicauda at further distances is compromised due to high temperature acting on the smaller viscid droplets, reduc...

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A 4-year study of invasive and native spider populations in Maine

Cited by 14 publications

References 32 publications

Veni, vidi, vici? Future spread and ecological impacts of a rapidly expanding invasive predator population

Veni, vidi, vici? Future spread and ecological impacts of a rapidly expanding invasive predator population

Veni, vidi, vici? Future spread and ecological impacts of a rapidly-expanding invasive predator population

Segregação espacial horizontal em pequena escala entre duas espécies da família Theridiidae (Araneae)

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