Differences

This shows you the differences between two versions of the page.

--- 2014:groups:g4:start [2014/01/29 09:57] – [Assignement] kraenkel
+++ 2014:groups:g4:start [2024/01/09 18:45] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
-====== Group4 ======
+**Group 4**
 ====== Facilitation and competition in the desert: saguaro cactus and Palo Verde trees ======
@@ Line 6: / Line 5: @@
 Wiki site of the practical exercise of the [[http://www.ictp-saifr.org/?page_id=4634|III Southern-Summer School on Mathematical Biology]].
-Here you find the exercise assigment and the group's products.
+Here you will find the exercise assigment and the group's products.
-If you are a group member login to edit this page, create new pages from that, and upload files.
+If you are a group member login to edit this page, create new pages from it, and upload files.
-===== Assignement =====
+===Final Presentation ===
+{{:2014:groups:g4:presentation-4.pdf| GROUP 4 PRESENTATION}}
+===== Group =====
+  * Abrego, Nerea; //University of the Basque Country, Dept. Plant Biology and Ecology, Spain//
+  * Contreras, Susana; //Universidad de los Andes, Dept. Biomedical Engineering, Colombia//
+  * Gonçalves, Guilherme Casas; //University of São Paulo, Mathematics Institute, Brazil//
+  * Medeiros, Lucas Paoliello de; //University of São Paulo, Ecology Department, Brazil//
+  * De Alencar Rocha, Maria Cecilia de Lima e Sá, //Federal Uni. Bahia, Biology Institute, Brazil//
+  * Rattis, Ludmila; //University of Campinas, Graduate School of Ecology, Brazil//
+----
+===Assistants===
+  * Bruno Pace
+  * Vitor Rios
+----
+===== Assignment =====
 **Facilitation**
-Facilitation is an interaction between species that benefits at least one of
+Facilitation is an interaction between species that benefits at least one of the participants in the interaction and causes harm to neither ((Adapted from Encyclopedia of Theoretical Ecology (A. Hastings and J. L. Gross, editors, Univ. California Press, 2012) )). This project concerns interactions between two different plant species in an arid environment.
-the participants in the interaction and cause harm to none(1). This project
+An example of facilitation between plants is connected to the idea of nurse plants. Nurse plants are those that facilitate the growth and development of other plant species beneath their canopy because they offer benign
-is concerned with interactions between to different plant species in an arid
+microhabitats that are more favorable for seed germination and/or seedling recruitment than their surrounding environment ((Adapted from  H. Ren, L. Yang, and N. Liu, Progress in Natural Science, 18, pp 137-142, 2008.)).
-environment.
-An example of facilitation between plants is connected to the idea of
-nurse plants. Nurse plants are those that facilitate the growth and development
-of other plant species beneath their canopy because they offer benign
-microhabitats that are more favorable for seed germination and/or seedling
-recruitment than their surrounding environment (2).
 {{ :2014:groups:g4:cactos.jpg?300 |}}
@@ Line 26: / Line 44: @@
-In the Sonora Desert  the saguaro cactus (//Carnegiea gigantea//) is commonly
+In the Sonora Desert  the saguaro cactus (//Carnegiea gigantea//) is commonly associated with canopies of trees (ex: Palo Alto), that function as nurse plants providing shelter for the cactus seedlings and young saguaro cacti. However, the nature of the interaction between saguaros and Palo Alto trees can change as the cactus grows: the larger cacti compete with the Palo Alto trees, and it has been established that the presence of saguaros contributes to Palo ALto mortality. The interaction switches from positive to negative.
-associated with canopies of trees (ex: Palo Alto), that function as nurse
-plants providing shelter for the cactus seedlings and young saguaro cacti.
-However, the nature of the interaction between saguaros and Palo Alto trees
-can change as the cactus grows: the larger cacti compete with the Palo Alto
-trees, and it has been established that the presence of saguaros contributes to Palo Verde mortality. The interaction has switched from positive to negative.
 {{ :2014:groups:g4:saguaro.jpg?300 |}}
@@ Line 37: / Line 50: @@
 ==== Project ====
-You should take as your starting point the paper by J.R.  McAuliffe, //Sahuaro-nurse tree associations in the Sonoran Desert: competitive effects of sahuaros//, Oecologia 64, pp. 319-321 (1984), available  at http://link.springer.com/article/10.1007%2FBF00379128 .  You will find a description of a particular system and references to previous studies. The initial idea is to propose a model for the population dynamics of saguaros (sometimes called sahuaros)  and Palo Altos.
+You should take as your starting point the paper by J.R.  McAuliffe, ((//Sahuaro-nurse tree associations in the Sonoran Desert: competitive effects of sahuaros//, Oecologia 64, pp. 319-321 (1984), available  at http://link.springer.com/article/10.1007%2FBF00379128 )).  You will find a description of a particular system and references to previous studies. The initial idea is to propose a model for the population dynamics of saguaros (sometimes called sahuaros) and Palo Altos.
-One of the possible next steps is to consider the what happens when the external conditions vary, leading to abiotic stress variations. Abiotic stress can be  water availably, temperature conditions, etc. We expect that the larger the abiotic stress, the more positive the interaction saguaro-paloalto will be.  Intuitively, when conditions are harsh for saguaro seedlings, the more important the effects of the nurse plants. You can find some references on this in C. Smit et alli, //Nurse plants, tree saplings and grazing pressure: change
+One of the possible next steps is to consider what happens when the external conditions vary, leading to abiotic stress variations. Abiotic stress can be  water availably, temperature conditions, etc. We expect that the larger the abiotic stress, the more positive the saguaro-palo alto interaction will be.  Intuitively, when conditions are harsh for saguaro seedlings, the effects of the nurse plants become more important . You can find some references on this in C. Smit et alli(( //Nurse plants, tree saplings and grazing pressure: change
-in facilitation along a biotic environmental gradient//, Oecologia 52, pp. 265-273 (2007), which you can find at http://www.unifr.ch/ecology/groupmueller/assets/files/Publications/2007/Smit2007.pdf (3).
+in facilitation along a biotic environmental gradient//, Oecologia 52, pp. 265-273 (2007), which you can find at http://www.unifr.ch/ecology/groupmueller/assets/files/Publications/2007/Smit2007.pdf . This paper is actually on biotic stress, but you can find references on abiotic factors in the introduction.)).
 ==== Further Reference ====
@@ Line 46: / Line 59: @@
 A general reference on facilitation and competition between plants is
-Ragan M. Callaway and Lawrence R. Walker, //Competition and facilitation: a synthetic approach  to  interaction in plant communities//, Ecology 78:1958-1965 (1997).
+Ragan M. Callaway and Lawrence R. Walker, //Competition and facilitation: a synthetic approach  to  interaction in plant communities//, Ecology 78:1958-1965 (1997). Available at
 http://www.esajournals.org/doi/abs/10.1890/0012-9658%281997%29078%5B1958%3ACAFASA%5D2.0.CO%3B2
 **Notes**
-(1) Adapted from Encyclopedia of Theoretical Ecology (A. Hastings and J.L Gross, editors, Univ. California Press,2012.
-(2) Adapted from  Ren, H., Yang,L. and Liu., N, Progress in Natural Science 18, pp 137-142 (2008).
-(3)This paper is actually on biotic stress, but you can find references on abiotic factors in the introduction.