Spatial Representations of Habitat in Competition‐Colonization Models

Abstract

Ecological models with species differentiated b y competition and colonization traitsAlthough the damage done to ecosystems where habitat is destroyed may be total, considerable attention has been focused on remnants of habitat within a matrix of destruction. One type of model indicates that some extant species in remnants of habitat are doomed to eventual extinction; an "extinction debt" exists (Tilman et al. 1994). There is a lag, or relaxation time, between when a piece of habitat becomes a remnant due to surrounding habitat destruction and the time when resident species becomes locally extinct (cf. MacArthur 1972, Fig. 5-20); this lag could vary from the remaining life span of an organism to multiple generations. The extinction debt Bart Cramer did much of the original pro ramming at the Department of Geography, Universi of Iowa. An anonymous reviewer made many hefpfiil comments and suggested the interpretation baseaion variance.George P. Malanson is a professor of geography at the Univer.sity of lowa.

Neighborhood functions alter unbalanced facilitation on a stress gradient

“…Where Travis et al (2006) simulated mutualists and cheaters, Chen et al (2009) simulated competitors and stress-tolerators to examine stress gradients, and others have commonly compared competitors and colonizers (e.g., Tilman et al, 1994;Malanson, 2002), here we create a somewhat different pairing. Our model is derived from our work on tree species at alpine treeline ecotones in Rocky Mountains of western North America (e.g., Zeng and Malanson (2006), Resler and Tomback (2008), Resler et al (2014)).…”

Neutral Landscapes: Bases for Exploration in Landscape Ecology

“…1989; King and With 2002; Lavorel et al. 1995); species abundance, coexistence, and extinction (Malanson 2002a,b; Palmer 1992); and forest sustainability (Gustafson and Loehle 2006).…”