Investigation of ground level and remote-sensed data for habitat classification and prediction of survival of Ixodes scapularis in habitats of southeastern Canada.

@article{citeulike:972966, abstract = {In southeastern Canada, most populations of Ixodes scapularis Say, the Lyme disease vector, occur in Carolinian forests. Climate change projections suggest a northward range expansion of I. scapularis this century, but it is unclear whether more northerly habitats are suitable for I. scapularis survival. In this study, we assessed the suitability of woodlands of the Lower Great Lakes/St. Lawrence Plain region for I. scapularis by comparing tick egg survival in four different woodlands. Woodlands where I. scapularis are established, and sand dune where I. scapularis do not survive, served as positive and negative control sites, respectively. At two woodland sites, egg survival was the same as at the positive control site, but at two of the sites survival was significantly less than either the positive control site, or one of the other test sites. Egg survival in all woodland sites was significantly higher than in the sand dune site. Ground level habitat classification discriminated among woodlands in which tick survival differed. The likelihood that I. scapularis populations could persist in the different habitats, as deduced using a population model of I. scapularis, was significantly associated with variations in Landsat 7 ETM+ data (normalized difference vegetation index [NDVI] and Tasselled Cap indices). The NDVI index predicted habitat suitability at Long Point, Ontario, with high sensitivity but moderate specificity. Our study suggests that I. scapularis populations could establish in more northerly woodland types than those in which they currently exist. Suitable habitats may be detected by ground-level habitat classification, and remote-sensed data may assist this process.}, address = {Groupe de Recherche en Epid\'{e}miologie des Zoonoses et Sant\'{e} Publique, Facult\'{e} de M\'{e}decine V\'{e}t\'{e}rinaire, Universit\'{e} de Montr\'{e}al, Que., Canada.}, author = {Ogden, N. H. and Barker, I. K. and Beauchamp, G. and Brazeau, S. and Charron, D. F. and Maarouf, A. and Morshed, M. G. and O'Callaghan, C. J. and Thompson, R. A. and Waltner-Toews, D. and Waltner-Toews, M. and Lindsay, L. R. }, citeulike-article-id = {972966}, issn = {0022-2585}, journal = {J Med Entomol}, keywords = {disease, habitat, ixodes, landsat, ndvi, remote-sensing, risk, tasseled-cap, ticks}, month = {March}, number = {2}, pages = {403--414}, posted-at = {2006-12-04 11:04:36}, priority = {2}, title = {Investigation of ground level and remote-sensed data for habitat classification and prediction of survival of Ixodes scapularis in habitats of southeastern Canada.}, url = {http://view.ncbi.nlm.nih.gov/pubmed/16619627}, volume = {43}, year = {2006} }

TY - JOUR ID - citeulike:972966 L3 - citeulike-article-id:972966 TI - Investigation of ground level and remote-sensed data for habitat classification and prediction of survival of Ixodes scapularis in habitats of southeastern Canada. JF - J Med Entomol VL - 43 IS - 2 SP - 403 EP - 414 AD - Groupe de Recherche en Epidémiologie des Zoonoses et Santé Publique, Faculté de Médecine Vétérinaire, Université de Montréal, Que., Canada. SN - 0022-2585 N2 - In southeastern Canada, most populations of Ixodes scapularis Say, the Lyme disease vector, occur in Carolinian forests. Climate change projections suggest a northward range expansion of I. scapularis this century, but it is unclear whether more northerly habitats are suitable for I. scapularis survival. In this study, we assessed the suitability of woodlands of the Lower Great Lakes/St. Lawrence Plain region for I. scapularis by comparing tick egg survival in four different woodlands. Woodlands where I. scapularis are established, and sand dune where I. scapularis do not survive, served as positive and negative control sites, respectively. At two woodland sites, egg survival was the same as at the positive control site, but at two of the sites survival was significantly less than either the positive control site, or one of the other test sites. Egg survival in all woodland sites was significantly higher than in the sand dune site. Ground level habitat classification discriminated among woodlands in which tick survival differed. The likelihood that I. scapularis populations could persist in the different habitats, as deduced using a population model of I. scapularis, was significantly associated with variations in Landsat 7 ETM+ data (normalized difference vegetation index [NDVI] and Tasselled Cap indices). The NDVI index predicted habitat suitability at Long Point, Ontario, with high sensitivity but moderate specificity. Our study suggests that I. scapularis populations could establish in more northerly woodland types than those in which they currently exist. Suitable habitats may be detected by ground-level habitat classification, and remote-sensed data may assist this process. KW - disease KW - habitat KW - ixodes KW - landsat KW - ndvi KW - remote-sensing KW - risk KW - tasseled-cap KW - ticks AU - Ogden, NH AU - Barker, IK AU - Beauchamp, G AU - Brazeau, S AU - Charron, DF AU - Maarouf, A AU - Morshed, MG AU - O'Callaghan, CJ AU - Thompson, RA AU - Waltner-Toews, D AU - Waltner-Toews, M AU - Lindsay, LR PY - 2006/03// UR - http://view.ncbi.nlm.nih.gov/pubmed/16619627 ER -