FORAMINIFERAL DENSITIES OVER FIVE YEARS IN THE INDIAN RIVER LAGOON, FLORIDA: A MODEL OF PULSATING PATCHES

Abstract

Research Article| January 01, 2002 FORAMINIFERAL DENSITIES OVER FIVE YEARS IN THE INDIAN RIVER LAGOON, FLORIDA: A MODEL OF PULSATING PATCHES Martin A. Buzas; Martin A. Buzas 4 1Smithsonian Institution, Washington, D. C. 20560-0121, 4Corresponding author. E-mail: [e-mail] Search for other works by this author on: GSW Google Scholar Lee-Ann C. Hayek; Lee-Ann C. Hayek 2Smithsonian Institution, Washington, D. C. 20560-0136, Search for other works by this author on: GSW Google Scholar Sherry A. Reed; Sherry A. Reed 3Smithsonian Marine Station, Ft. Pierce, FL 34949 Search for other works by this author on: GSW Google Scholar Jennifer A. Jett Jennifer A. Jett 1Smithsonian Institution, Washington, D. C. 20560-0121, Search for other works by this author on: GSW Google Scholar Author and Article Information Martin A. Buzas 4 1Smithsonian Institution, Washington, D. C. 20560-0121, Lee-Ann C. Hayek 2Smithsonian Institution, Washington, D. C. 20560-0136, Sherry A. Reed 3Smithsonian Marine Station, Ft. Pierce, FL 34949 Jennifer A. Jett 1Smithsonian Institution, Washington, D. C. 20560-0121, 4Corresponding author. E-mail: [e-mail] Publisher: Cushman Foundation for Foraminiferal Research Received: 13 Feb 2001 Accepted: 15 May 2001 First Online: 03 Mar 2017 Online ISSN: 1943-264X Print ISSN: 0096-1191 © 2002 Journal of Foraminiferal Research Journal of Foraminiferal Research (2002) 32 (1): 68–92. https://doi.org/10.2113/0320068 Article history Received: 13 Feb 2001 Accepted: 15 May 2001 First Online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Tools Icon Tools Get Permissions Search Site Citation Martin A. Buzas, Lee-Ann C. Hayek, Sherry A. Reed, Jennifer A. Jett; FORAMINIFERAL DENSITIES OVER FIVE YEARS IN THE INDIAN RIVER LAGOON, FLORIDA: A MODEL OF PULSATING PATCHES. Journal of Foraminiferal Research 2002;; 32 (1): 68–92. doi: https://doi.org/10.2113/0320068 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyJournal of Foraminiferal Research Search Advanced Search Abstract Densities of 5 taxa along with 7 environmental variables were measured monthly with 4 replicates at each of 3 stations over a period of 5 years. The 720 observations of density for each taxon were analyzed by General Linear Models with density as the dependent variable. Differences among stations, years, seasons and their interactions are all significant. When treated as covariates environmental variables contributed little to explaining the observed variability in densities. However, the observed densities of the taxa are highly correlated and when a single taxon is treated as a covariate most of the variability in the density of a related taxon is explained. There are no significant differences among replicates (taken within a square meter) or their interactions. Consequently, the biotic or abiotic factor(s), although unknown, responsible for the simultaneous density variation of the taxa operate on a relatively small spatial scale. Based on these observations and previous studies, we propose a model wherein individual foraminifers are spatially distributed as a heterogeneous continuum forming patches with different densities that are only meters apart; reproduction is asynchronous causing pulsating patches that vary in space and time. Thus, we would expect significant differences among stations, years, seasons and their interaction. At the same time, no long-term increase or decrease in density for any of the taxa is observed. Evidently, long-term stability is achieved through considerable short-term variability in space and time. Although observations at a single station are not indicative of a larger area at any particular time, the concept of pulsating patches indicates that observations at a station will in the long-term give an assessment of a larger area. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.