Ecological Characterisation of Native Isolates of <i>Heterorhabditis indica</i> from Viti Levu, Fiji Islands

Kour, Sarabdeep; Khurma, Uma R.; Brodie, Gilianne D.

doi:10.21307/jofnem-2021-085

Cited by 2 publications

(5 citation statements)

References 82 publications

(148 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The temperature range of 18-33°C could represent all the recorded distribution of H. indica except one. The temperature range is also in agreement with the thermal niche breadth of H. indica found in the ecological studies reported by Kour et al (2021).…”

Section: Model Fitting and Verificationssupporting

confidence: 89%

“…The temperature range is also in agreement with the thermal niche breadth of H . indica found in the ecological studies reported by Kour et al ( 2021 ).…”

Section: Methodsmentioning

confidence: 83%

“…Developmental threshold temperature data of H . indica and moisture requirement was inferred from laboratory data given by Kour et al ( 2021 ) and were used to define parameter values for temperature index and moisture index. Values for stress indices were adjusted iteratively, by running and re‐running the parameter file with different parameter values so that the projected climate suitability patterns match with the known occurrence of H .…”

Section: Methodsmentioning

confidence: 99%

“…indica occurrence in Alexandria, Egypt; hence it was reduced to 18°C to include the positive site in Alexandria, Egypt. The lower optimum temperature threshold (DV1) and upper optimum temperature threshold (DV2) were set at 25 and 30°C, respectively, as per the optimum temperature regime established in ecological studies reported by Kour et al ( 2021 ). Temperature above 35°C is lethal to H .…”

Section: Methodsmentioning

confidence: 99%

“…Temperature above 35°C is lethal to H . indica (Kour et al, 2021 ); hence DV3 was set to 33°C. The temperature range of 18–33°C could represent all the recorded distribution of H .…”

Section: Methodsmentioning

confidence: 99%

See 4 more Smart Citations

Modeling the potential global distribution of suitable habitat for the biological control agent Heterorhabditis indica

Kour

Khurma

Brodie

et al. 2022

Ecology and Evolution

Self Cite

View full text Add to dashboard Cite

Entomopathogenic nematode (EPN) Heterorhabditis indica is a promising biocontrol candidate. Despite the acknowledged importance of EPN in pest control, no extensive data sets or maps have been developed on their distribution at global level. This study is the first attempt to generate Ecological Niche Models (ENM) for H . indica and its global Habitat Suitability Map (HSM) for H. indica to generate biogeographical information and predicts its global geographical range and help identify of prospective areas for its exploration and to help identify the suitable release areas for biocontrol purpose. The aim of the modeling exercise was to access the influence of temperature and soil moisture on the biogeographical patterns of H . indica at the global level. Global Heterorhabditis indica ecosystems. CLIMEX software was used to model the distribution of H . indica and assess the influence of environmental variable on its global distribution. In total, 162 records of H . indica occurrence from 27 countries over 25 years were combined to generate the known distribution data. The model was further fine‐tuned using the direct experimental observations of the H . indica's growth response to temperature and soil moisture. Model predicts that much of the tropics and subtropics have suitable climatic conditions for H . indica . It further predicts that H . indica distribution can extend into warmer temperate climates. Examination of the model output, predictions maps at a global level indicate that H . indica distribution may be limited by cold stress, heat stress, and dry stresses in different areas. However, cold stress appears to be the major limiting factor. This study highlighted an efficient way to construct HSM for EPN potentially useful in the search/release of target species in new locations. The study showed that H . indica which is known as warm adapted EPN generally found in tropics and subtropics can potentially establish itself in warmer temperate climates as well. The model can also be used to decide the release timing of EPN by adjusting with season for maximum growth. The model developed in this study clearly identified the value and potential of Habitat Suitability Map (HSM) in planning of future surveys and application of H . indica .

show abstract

Section: Model Fitting and Verificationssupporting

confidence: 89%

“…The temperature range is also in agreement with the thermal niche breadth of H . indica found in the ecological studies reported by Kour et al ( 2021 ).…”

Section: Methodsmentioning

confidence: 83%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…Temperature above 35°C is lethal to H . indica (Kour et al, 2021 ); hence DV3 was set to 33°C. The temperature range of 18–33°C could represent all the recorded distribution of H .…”

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations