Mortality rate estimation for eelgrass Zostera marina (Potamogetonaceae) using projections from Leslie matrices

Flores Uzeta, Olga; Solana Arellano, Elena; Echeverría Heras, Héctor

dc.creator	Flores Uzeta, Olga
dc.creator	Solana Arellano, Elena
dc.creator	Echeverría Heras, Héctor
dc.date	2006-08-28
dc.date.accessioned	2016-05-03T15:29:09Z
dc.date.available	2016-05-03T15:29:09Z
dc.identifier	http://revistas.ucr.ac.cr/index.php/rbt/article/view/5689
dc.identifier	10.15517/rbt.v56i3.5689
dc.identifier.uri	https://hdl.handle.net/10669/26623
dc.description	The main goal of this study is to provide estimations of mean mortality rate of vegetative shoots of the seagrass Zostera marina in a meadow near Ensenada Baja California, using a technique that minimizes destructive sampling. Using cohorts and Leslie matrices, three life tables were constructed, each representing a season within the period of monthly sampling (April 1999 to April 2000). Ages for the cohorts were established in terms of Plastochrone Interval (PI). The matrices were projected through time to estimate the mean total number of individuals at time t, n(t) as well as mortality. We found no statistical differences between observed and predicted mean values for these variables (t=-0.11, p=0.92 for n(t) and t=0.69, p=0.5 for mean rate of mortality). We found high correlation coefficient values between observed and projected values for monthly number of individuals (r=0.70, p=0.007) and monthly mortality rates (r=0.81, p=0.001). If at a certain time t a sudden environmental change occurs, and as long as the perturbation does not provoke the killing of all the individuals of a given age i for 0 = i = x - 1, there will be a prevailing number of individuals of age or stage x at a time t+1. This nondestructive technique reduces the number of field visits and samples needed for the demographic analysis of Z. marina, and therefore decreases the disturbance caused by researches to the ecosystem.	en-US
dc.format	application/pdf
dc.language	eng
dc.publisher	Universidad de Costa Rica	en-US
dc.rights	Copyright (c) 2014 International Journal of Tropical Biology and Conservation	en-US
dc.source	Revista de Biología Tropical/International Journal of Tropical Biology and Conservation; Vol. 56 (3) September 2008	en-US
dc.source	Revista de Biología Tropical/International Journal of Tropical Biology and Conservation; Vol. 56 (3) September 2008	es-ES
dc.source	Revista Biología Tropical; Vol. 56 (3) September 2008	pt-PT
dc.source	2215-2075
dc.source	0034-7744
dc.source	10.15517/rbt.v56i3
dc.title	Mortality rate estimation for eelgrass Zostera marina (Potamogetonaceae) using projections from Leslie matrices	en-US
dc.title	Mortality rate estimation for eelgrass Zostera marina (Potamogetonaceae) using projections from Leslie matrices	es-ES
dc.type	artículo original
dc.coverage	CRC	en-US

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