Tuning stochastic matrix models with hydrologic data to predict the population dynamics of a riverine fish

2010 ◽  
Vol 20 (2) ◽  
pp. 483-496 ◽  
Author(s):  
Peter C. Sakaris ◽  
Elise R. Irwin
Keyword(s):  
Population Dynamics ◽  
Matrix Models ◽  
Stochastic Matrix ◽  
Hydrologic Data ◽  
Riverine Fish ◽  
Stochastic Matrix Models

Biotic interactions and the population dynamics of the long-lived columnar cactus Neobuxbaumia tetetzo in the Tehuacán Valley, Mexico

1999 ◽  
Vol 77 (2) ◽  
pp. 203-208 ◽  
Author(s):  
Héctor Godínez-Alvarez ◽  
Alfonso Valiente-Banuet ◽  
Leopoldo Valiente Banuet
Keyword(s):  
Population Dynamics ◽  
Matrix Models ◽  
Biotic Interactions ◽  
Positive Interactions ◽  
Elasticity Analysis ◽  
Finite Rate ◽  
Tehuacán Valley ◽  
Columnar Cactus ◽  
Tehuacan Valley ◽  
Rate Of Increase

The giant columnar cactus Neobuxbaumia tetetzo (Coulter) Backeberg is the dominant species of a vegetation type locally called "tetechera" that occupies ca. 400 km2 in the Tehuacán Valley. As a way to analyse the role of biotic interactions on the population dynamics of this species, we conducted an elasticity analysis, using matrix models elaborated from field data, to determine the finite rate of increase and the critical stages of the life cycle that were related to the biotic interactions occurring during these stages. Although the estimated finite rate of increase did not differ from unity there were significant differences between the actual and predicted size distributions. Elasticity analysis showed that survivorship was the most important life-history parameter to the finite rate of increase. Because survivorship depends on the presence of nurse plants, our results emphasise the importance of positive interactions on the population dynamics of long-lived columnar cacti.Key words: biotic interactions, Cactaceae, deserts, matrix models, population dynamics.

Matrix models using fine size classes and their application to the population dynamics of tree species: Bayesian non-parametric estimation

2007 ◽  
Vol 22 (3) ◽  
pp. 175-190 ◽  
Author(s):  
ICHIRO K. SHIMATANI ◽  
YASUHIRO KUBOTA ◽  
KIWAKO ARAKI ◽  
SHIN-ICHI AIKAWA ◽  
TOHRU MANABE
Keyword(s):  
Population Dynamics ◽  
Matrix Models ◽  
Tree Species ◽  
Parametric Estimation ◽  
Size Classes ◽  
Fine Size ◽  
Non Parametric Estimation ◽  
Non Parametric
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