Novel application of explicit dynamics occupancy models to ongoing aquatic invasions

Sepulveda, Adam J.

doi:10.1111/1365-2664.13002

Cited by 8 publications

(2 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A negative relationship was reported for bullfrog abundance, where higher abundances occurred closer to cities, consistent with expectations. Other studies have also reported higher invasive abundance in more disturbed environments (Riley et al, 2005; Ficetola, Thuiller & Miaud, 2007; Sepúlveda et al, 2015; Sepulveda, 2018). In contrast, crayfish abundance was significantly positively correlated with distance from cities, where lower abundances were recorded closer to cities.…”

Section: Discussionmentioning

confidence: 85%

Geospatial assessment of freshwater invasive species to inform turtle conservation and management

Araya‐Donoso

Orton

Ryan

et al. 2022

Aquatic Conservation

View full text Add to dashboard Cite

1. Identifying the ecological factors that determine the spread of invasive species is key to adequately managing endangered species in freshwater ecosystems.Invasive species are a main threat to turtles, which are targets of major conservation efforts worldwide.2. In freshwater ecosystems of the south-western USA, invasive bullfrog (Lithobates catesbeianus) and crayfish species (Faxonius virilis and Procambarus clarkii) represent a major risk to the desert mud turtle (Kinosternon sonoriense sonoriense), state-listed as a Species of Greatest Conservation Need in Arizona. As a species in the early stages of population decline, the desert mud turtle is a top candidate for the development of management plans to decrease extinction risk.3. An invasion risk assessment tool was built from available occurrence data for K. s. sonoriense and the invasive bullfrog and crayfish species in Arizona using 5,886 de-duplicated records from public databases and reports from the Arizona Game and Fish Department. The occurrence density of K. s. sonoriense was calculated state-wide to define populations in which the level of invasion by bullfrog and crayfish was assessed. The environmental factors associated with the abundance of invasive species in populations of K. s. sonoriense were then analysed. 4. A higher prevalence of crayfish and bullfrog was detected in turtle populations located in perennial streams. Invasive abundance was significantly higher in turtle populations at higher elevation and closer to the main river trunk for both invasive taxa. Higher bullfrog abundance was detected near human settlements, whereas crayfish were more abundant further from human settlements. 5. These results will inform which populations of K. s. sonoriense require intensive surveying and control of invasive species to maintain the health of native desert mud turtle populations. This study provides valuable information regarding the environmental conditions associated with the abundance of invasive species threatening turtle populations, helping to develop science-based management of freshwater ecosystems.

show abstract

Section: Discussionmentioning

confidence: 85%

Geospatial assessment of freshwater invasive species to inform turtle conservation and management

Araya‐Donoso

Orton

Ryan

et al. 2022

Aquatic Conservation

View full text Add to dashboard Cite

show abstract

“…sinks) but their landscape‐level persistence is maintained through some populations existing in suitable habitat and dispersing to other patches (i.e., sources) (Pulliam, 1988 ). There are few examples of how invasive species may exhibit source‐sink dynamics and include taxa such as mussels, amphibians, and fish (Bobeldyk et al., 2005 ; Dauphinais et al., 2018 ; Sepulveda, 2018 ). This has important implications for managing the spread of Hydrilla , as targeting the removal of large source populations may be a more effective strategy than attempting to control the species in numerous small, ephemeral sink populations (Sepulveda, 2018 ).…”

Section: Discussionmentioning

confidence: 99%

Regional and local factors interact to shape colonization and extinction dynamics of invasive Hydrilla verticillata in a patchy landscape

Armstrong,

Bulluck,

Davidson

et al. 2024

Ecology and Evolution

View full text Add to dashboard Cite

Understanding the response of species to global change requires disentangling the drivers of their distributions across landscapes. Colonization and extinction processes, shaped by the interplay of landscape‐level and local patch‐level factors, are key determinants of these distributions. However, disentangling the influence of these factors, when larger‐scale processes manifest at local scales, remains a challenge. We addressed this challenge by investigating the colonization and extinction dynamics of the aquatic plant, Hydrilla verticillata, in a complex riverine rock pool system. This system, with hundreds of rock pools experiencing varying flooding frequencies, provided a natural laboratory to examine how a single landscape‐level disturbance can differentially impact colonization and extinction depending on local patch characteristics to shape species distributions. Using 5 years of data across over 500 sites and more than 5000 surveys, we employed dynamic occupancy models to model colonization, extinction, and changes in Hydrilla patch occupancy while accounting for imperfect detection. Our results revealed that larger, infrequently flooded pools closer to the river were more likely to be colonized. In contrast, local extinction of Hydrilla was more likely in smaller pools closer to the river that flooded frequently. These findings underscore the importance of considering context‐dependence in species distribution models. The same landscape‐level disturbance (flooding) had opposing effects on colonization and extinction, with the direction and magnitude of these effects varying with local patch characteristics. Our study highlights the need for integrating local and landscape‐level factors, and considering how larger‐scale processes play out at the patch level, to understand the complex dynamics that shape species distributions.

show abstract

Phenological mismatches mitigate the ecological impact of a biological invader on amphibian communities

Everts,

Van Driessche,

Neyrinck

et al. 2024

Ecological Applications

View full text Add to dashboard Cite

Horizon scans have emerged as a valuable tool to anticipate the incoming invasive alien species (IAS) by judging species on their potential impacts. However, little research has been conducted on quantifying actual impacts and assessing causes of species‐specific vulnerabilities to particular IAS due to persistent methodological challenges. The underlying interspecific mechanisms driving species‐specific vulnerabilities therefore remain poorly understood, even though they can substantially improve the accuracy of risk assessments. Given that interspecific interactions underlying ecological impacts of IAS are often shaped by phenological synchrony, we tested the hypothesis that temporal mismatches in breeding phenology between native species and IAS can mitigate their ecological impacts. Focusing on the invasive American bullfrog (Lithobates catesbeianus), we combined an environmental DNA (eDNA) quantitative barcoding and metabarcoding survey in Belgium with a global meta‐analysis, and integrated citizen‐science data on breeding phenology. We examined whether the presence of native amphibian species was negatively related to the presence or abundance of invasive bullfrogs and whether this relationship was affected by their phenological mismatches. The field study revealed a significant negative effect of increasing bullfrog eDNA concentrations on native amphibian species richness and community structure. These observations were shaped by species‐specific vulnerabilities to invasive bullfrogs, with late spring‐ and summer‐breeding species being strongly affected, while winter‐breeding species remained unaffected. This trend was confirmed by the global meta‐analysis. A significant negative relationship was observed between phenological mismatch and the impact of bullfrogs. Specifically, native amphibian species with breeding phenology differing by 6 weeks or less from invasive bullfrogs were more likely to be absent in the presence of bullfrogs than species whose phenology differed by more than 6 weeks with that of bullfrogs. Taken together, we present a novel method based on the combination of aqueous eDNA quantitative barcoding and metabarcoding to quantify the ecological impacts of biological invaders at the community level. We show that phenological mismatches between native and invasive species can be a strong predictor of invasion impact regardless of ecological or methodological context. Therefore, we advocate for the integration of temporal alignment between native and IAS's phenologies into invasion impact frameworks.

show abstract

Novel application of explicit dynamics occupancy models to ongoing aquatic invasions

Cited by 8 publications

References 41 publications

Geospatial assessment of freshwater invasive species to inform turtle conservation and management

Geospatial assessment of freshwater invasive species to inform turtle conservation and management

Regional and local factors interact to shape colonization and extinction dynamics of invasive Hydrilla verticillata in a patchy landscape

Phenological mismatches mitigate the ecological impact of a biological invader on amphibian communities

Contact Info

Product

Resources

About