Deletion of Mark Williamson

Comment: Easily meets . See http://scholar.google.com/scholar?q=author%3A%22m+williamson%22+invasion+OR+invasive+OR+alien+OR+species+OR+ecology Google Scholar search giving publications with top citation counts of 1022, 892, 785, 624, or this http://impact.ref.ac.uk/casestudiesapi/refservice.svc/GetCaseStudyPDF/43424 research impact case study (pdf): ''"Mark Williamson, Professor of Biology at York (now Emeritus), OBE for services to environmental protection, and his collaborators at York transformed research on Invasive Alien Species (IAS) and created a framework that has since formed the basis for rational policy. Williamson’s (1996) classic book “Biological Invasions” established the conceptual framework that helped determine the direction of future research and its applications. This is the most heavily-cited work on biological invasions published in the 1990s
Stance: keep
Cited policy: Wikipedia:Notability (WP:NACADEMIC)