Realized niche shift of an invasive widow spider: drivers and impacts of human activities

Abstract

Background Predicting invasiveness requires an understanding of the propensity of a given species to thrive in areas with novel ecological challenges. Evaluation of realized niche shift of an invasive species in its invasive range, detecting the main drivers of the realized niche shift, and predicting the potential distribution of the species can provide important information for the management of populations of invasive species and the conservation of biodiversity. The Australian redback spider, Latrodectus hasselti, is a widow spider that is native to Australia and established in Japan, New Zealand, and Southeast Asia. We used ecological niche models and ordinal comparisons in an integrative method to compare the realized niches of native and invasive populations of this spider species. We also assessed the impact of several climatic predictor variables and human activity on this niche shift. We hypothesized that human impact is important for successful establishment of this anthropophilic species, and that climatic predictor variables may determine suitable habitat and thus predict invasive ranges. Results Our models showed that L. hasselti distributions are positively influenced by human impact in both of the native and invasive ranges. Maximum temperature was the most important climatic variable in predictions of the distribution of native populations, while precipitation seasonality was the most important in predictions of invasive populations. The realized niche of L. hasselti in its invasive range differed from that in its native range, indicating possible realized niche shift. Conclusions We infer that a preference for human-disturbed environments may underlie invasion and establishment in this spider species, as anthropogenic habitat modifications could provide shelters from unsuitable climatic conditions and extreme climatic stresses to the spiders. Because Australia and the countries in which the species is invasive have differing climates, differences in the availability of certain climatic conditions could have played a role in the realized niche shift of L. hasselti.

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

“…Our results suggest that T. clavata may have experienced a shift in its realized niche, similar to what Luo et al. (2022) found with Latrodectus hasselti (which is native to Australia) in its introduced range of Japan, New Zealand, and Southeast Asia. Second, although all climatic variables differed significantly between Asia and North America, the effect size differences between minimum temperature, temperature range, and annual precipitation were small or very small (see Table S2 in the Appendix S1).…”

Constructing an Ensemble Model and Niche Comparison for the Management Planning of Eucalyptus Longhorned Borer Phoracantha semipunctata under Climate Change

“…Consequently, the above-mentioned findings indicate that the environmental conditions of the Mediterranean and coastal ranges are more suitable for P. semipunctata . Human activities have facilitated the global biological invasion process, from disrupting ecosystems to transporting invasive alien species [ 48 , 49 , 50 ]. Our results show that with an increase in the HII, the presence probability of P. semipunctata showed an upward trend.…”

Patterns and drivers of climatic niche dynamics during biological invasions of island‐endemic amphibians, reptiles, and birds

“…However, this assumption has been increasingly challenged (see Bates & Bertelsmeier, 2021 , for a comprehensive review). Climatic niche shifts have been documented in several taxa, sometimes corresponding to realizations of different parts of the fundamental niche (realized niche shifts, e.g., Luo et al, 2022 ), but in other cases representing adaptations to novel climates through evolved environmental tolerance (Huey & Pascual, 2009 ; Müller‐Schärer et al, 2004 ). Here, we found instances of one or the other situation in most of the analyzed invasion clusters.…”