Geography Reference
In-Depth Information
1. Construct individual tracks for different taxa, connecting the localities
where they are distributed by a minimum-spanning tree.
2. If possible, orient the individual tracks with baselines.
3. Recognize similar tracks (in oriented tracks, they should have the same
direction), which will be considered as part of the same generalized track.
4. Recognize nodes in the areas where two or more generalized tracks su-
perimpose.
5. Indicate on a map the generalized tracks, baselines, and nodes.
Software
Trazos2004 (Rojas Parra 2007).
Empirical Applications
Abrahamovich et al. (2004), Aguilar-Aguilar and
Contreras-Medina (2001), Álvarez Mondragón and Morrone (2004), Ander-
sen (1982), Candela and Morrone (2003), Carvalho et al. (2003), Chris-
tiansen and Culver (1987), Contreras-Medina and Eliosa León (2001),
Contreras-Medina et al. (1999), Corona and Morrone (2005), Croizat
(1958b, 1964, 1976), De Marmels (2000), Escalante et al. (2004), Fontenla
(2005), Franco Rosselli and Berg (1997), González-Zamora et al. (2007);
Grant et al. (2006), Grehan (2001a, 2001b, 2001c, 2007), Grehan and
Rawlings (2003), Heads (1986, 1989, 1996, 2001, 2005b), Katinas et al.
(1999), Kolibác (1998), López Almirall (2005), López-Ruf et al. (2006), Lo-
pretto and Morrone (1998), Luna-Vega and Alcántara (2002), Luna-Vega
and Contreras-Medina (2000), Márquez and Morrone (2003), Menu-Marque
et al. (2000), Morrone (1993c, 1994c, 1996b, 1996c, 2000a, 2000b, 2000f,
2000h, 2001a, 2001b, 2001d, 2001f), Morrone and Gutiérrez (2005), Mor-
rone and Pereira (1999), Morrone et al. (2002, 2004), Nihei and de Carvalho
(2005), Ochoa et al. (2003), Roig-Juñent et al. (2003), Rosas-Valdez and
Pérez-Ponce de León (2005), Rosen (1976), Soares and de Carvalho
(2005), and Torres-Miranda and Luna-Vega (2006).
Plant and animal taxa inhabiting caves are interesting from both biogeographic
and evolutionary viewpoints. Collembola (Hexapoda) possess many cave-inhabit-
ing genera in the New World, some of them showing different levels of adaptation
to life in caves, known as troglomorphy. Christiansen and Culver (1987) analyzed
