Hi Brian Try this reference and those it cites or are cited by it:
http://scholar.google.co.uk/citations?view_op=view_citation&hl=en&user=Ch7PkZIAAAAJ&citation_for_view=Ch7PkZIAAAAJ:hqOjcs7Dif8C Cheers Tim ________________________________________ From: Ecological Society of America: grants, jobs, news [ECOLOG-L@LISTSERV.UMD.EDU] on behalf of Brian Mitchell [brmitchell...@gmail.com] Sent: Friday, 9 June 2017 6:55 a.m. To: ECOLOG-L@LISTSERV.UMD.EDU Subject: [ECOLOG-L] Using nested quadrat data as an index of abundance Hello Ecolog, I'm aware of the use of nested quadrats to serve a couple of potential purposes when sampling a community. The approach records presence/absence of different species within differently sized quadrats (e.g., 1 m^2 nested within 10 m^2 nested within 100 m^2) at multiple locations within a site or study area. One application would be to generate species accumulation curves (e.g., estimate the number of species present at 1,000 m^2). Another application would be to ensure that a suitable quadrat size is available for estimating change in frequency over time or between sites. The rationale is that a common species should have frequency sampled on smaller quadrats (otherwise the data are all "present") and that rare species should be sampled on larger quadrats (otherwise the data are all "absent"). By using multiple quadrat sizes, it is more likely that most of the species will be sampled at an appropriate spatial scale. My question is whether anyone is aware of an approach that uses the data for a given species from all of the quadrats to develop an index or estimate of abundance. Is there a theoretically sound way to use data collected at the different spatial scales? I'd appreciate any citations or approaches that list members could send my way. Thanks! Brian Mitchell National Park Service Southeast Region Inventory and Monitoring Division ________________________________ P Please consider the environment before you print this email. "The contents of this e-mail (including any attachments) may be confidential and/or subject to copyright. Any unauthorised use, distribution, or copying of the contents is expressly prohibited. If you have received this e-mail in error, please advise the sender by return e-mail or telephone and then delete this e-mail together with all attachments from your system."
