Seasonal synchrony: the key to tick-borne encephalitis foci identified by satellite data
Summary: A previous analysis of tick infestation patterns on rodents in Slovakia suggested that the key to the focal distribution of western-type tick-borne encephalitis virus (TBEv) in Europe is the geographically variable degree of synchrony in the seasonal activity of larval and nymphal <em>...
| Main Authors: | , , , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
Cambridge University Press
2000
|
| Subjects: |
| _version_ | 1826268701333127168 |
|---|---|
| author | Randolph, S Green, R Peacey, M Rogers, D |
| author_facet | Randolph, S Green, R Peacey, M Rogers, D |
| author_sort | Randolph, S |
| collection | OXFORD |
| description | Summary: A previous analysis of tick infestation patterns on rodents in Slovakia suggested that the key to the focal distribution of western-type tick-borne encephalitis virus (TBEv) in Europe is the geographically variable degree of synchrony in the seasonal activity of larval and nymphal <em>Ixodes ricinus</em> ticks. This prediction is here tested by examining records, from 7 different countries, of the seasonal variation in the abundance of larvae and nymphs feeding on rodents or questing on the vegetation. Larvae consistently started feeding and questing earlier in the year at sites within TBEv foci than elsewhere, so that they appeared in the spring as soon as nymphs were active. Such larval-nymphal synchrony is associated with a rapid fall in ground-level temperatures from August to October as revealed by the satellite-derived index of Land Surface Temperature (LST). Likewise, of 1992 pixels sampled on a grid across Europe, the 418 that fell within TBEv foci were characterized by a higher than average rate of autumnal cooling relative to the peak midsummer LST. It is proposed that such a seasonal temperature profile may cause unfed larvae to pass the winter in quiescence, from which they emerge synchronously with nymphs in the spring. |
| first_indexed | 2024-03-06T21:13:40Z |
| format | Journal article |
| id | oxford-uuid:3f09131b-7a72-4910-b7a1-4d5cd17f06db |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T21:13:40Z |
| publishDate | 2000 |
| publisher | Cambridge University Press |
| record_format | dspace |
| spelling | oxford-uuid:3f09131b-7a72-4910-b7a1-4d5cd17f06db2022-03-26T14:29:23ZSeasonal synchrony: the key to tick-borne encephalitis foci identified by satellite dataJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:3f09131b-7a72-4910-b7a1-4d5cd17f06dbZoological sciencesEnglishOxford University Research Archive - ValetCambridge University Press2000Randolph, SGreen, RPeacey, MRogers, DSummary: A previous analysis of tick infestation patterns on rodents in Slovakia suggested that the key to the focal distribution of western-type tick-borne encephalitis virus (TBEv) in Europe is the geographically variable degree of synchrony in the seasonal activity of larval and nymphal <em>Ixodes ricinus</em> ticks. This prediction is here tested by examining records, from 7 different countries, of the seasonal variation in the abundance of larvae and nymphs feeding on rodents or questing on the vegetation. Larvae consistently started feeding and questing earlier in the year at sites within TBEv foci than elsewhere, so that they appeared in the spring as soon as nymphs were active. Such larval-nymphal synchrony is associated with a rapid fall in ground-level temperatures from August to October as revealed by the satellite-derived index of Land Surface Temperature (LST). Likewise, of 1992 pixels sampled on a grid across Europe, the 418 that fell within TBEv foci were characterized by a higher than average rate of autumnal cooling relative to the peak midsummer LST. It is proposed that such a seasonal temperature profile may cause unfed larvae to pass the winter in quiescence, from which they emerge synchronously with nymphs in the spring. |
| spellingShingle | Zoological sciences Randolph, S Green, R Peacey, M Rogers, D Seasonal synchrony: the key to tick-borne encephalitis foci identified by satellite data |
| title | Seasonal synchrony: the key to tick-borne encephalitis foci identified by satellite data |
| title_full | Seasonal synchrony: the key to tick-borne encephalitis foci identified by satellite data |
| title_fullStr | Seasonal synchrony: the key to tick-borne encephalitis foci identified by satellite data |
| title_full_unstemmed | Seasonal synchrony: the key to tick-borne encephalitis foci identified by satellite data |
| title_short | Seasonal synchrony: the key to tick-borne encephalitis foci identified by satellite data |
| title_sort | seasonal synchrony the key to tick borne encephalitis foci identified by satellite data |
| topic | Zoological sciences |
| work_keys_str_mv | AT randolphs seasonalsynchronythekeytotickborneencephalitisfociidentifiedbysatellitedata AT greenr seasonalsynchronythekeytotickborneencephalitisfociidentifiedbysatellitedata AT peaceym seasonalsynchronythekeytotickborneencephalitisfociidentifiedbysatellitedata AT rogersd seasonalsynchronythekeytotickborneencephalitisfociidentifiedbysatellitedata |