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Book contents
- Frontmatter
- Contents
- List of contributors
- Foreword
- Part I Cheirogaleidae: evolution, taxonomy, and genetics
- Part II Methods for studying captive and wild cheirogaleids
- Part III Cheirogaleidae: behavior and ecology
- Part IV Cheirogaleidae: sensory ecology, communication, and cognition
- Part V Cheirogaleidae: conservation biogeography
- 23 Ecological niche modeling of mouse lemurs (Microcebus spp.) and its implications for their species diversity and biogeography
- 24 Edge effects on tree dendrometrics, abiotics, and mouse lemur densities in western dry forests in Madagascar
- 25 Factors determining Microcebus abundance in a fragmented landscape in Ankarafantsika National Park, Madagascar
- 26 Can behavioral ecology help to understand the divergent geographic range sizes of mouse lemurs?
- 27 Conservation biology of the Cheirogaleidae: future research directions
- Index
- Plate section
- References
25 - Factors determining Microcebus abundance in a fragmented landscape in Ankarafantsika National Park, Madagascar
from Part V - Cheirogaleidae: conservation biogeography
Published online by Cambridge University Press: 05 March 2016
- Frontmatter
- Contents
- List of contributors
- Foreword
- Part I Cheirogaleidae: evolution, taxonomy, and genetics
- Part II Methods for studying captive and wild cheirogaleids
- Part III Cheirogaleidae: behavior and ecology
- Part IV Cheirogaleidae: sensory ecology, communication, and cognition
- Part V Cheirogaleidae: conservation biogeography
- 23 Ecological niche modeling of mouse lemurs (Microcebus spp.) and its implications for their species diversity and biogeography
- 24 Edge effects on tree dendrometrics, abiotics, and mouse lemur densities in western dry forests in Madagascar
- 25 Factors determining Microcebus abundance in a fragmented landscape in Ankarafantsika National Park, Madagascar
- 26 Can behavioral ecology help to understand the divergent geographic range sizes of mouse lemurs?
- 27 Conservation biology of the Cheirogaleidae: future research directions
- Index
- Plate section
- References
Summary
Introduction
A fundamental issue in conservation biogeography is determining how and why population density (the number of individuals per unit area) and abundance (number of individual animals) vary across the geographic range of plant and animal species (Whittaker et al., 2005). Understanding these relationships is critical because they provide information on population dynamics and extinction probabilities (Wilcox and Murphy, 1985; Lima and Zollner, 1996). For example, Davidson et al. (2009) conducted a meta-analysis of 4500 mammal species and found that population density was one of the main predictors of extinction risk. Consequently, researchers have explored numerous covariates to primate density and abundance, including food quality and amount (Stevenson, 2001; Chapman et al., 2004), temporal distribution of key food resources (Terborgh, 1986), habitat structure such as basal area, stem density, tree height and size (Rovero and Struhsaker, 2007; Pozo-Montuy et al., 2011; Grow et al., 2013), habitat quality such as plant productivity (Janson and Chapman, 1999), rainfall and temperature (Pinto et al., 2009), distribution (Harcourt and Doherty, 2005), fragment area and isolation (Anzures-Dadda and Manson, 2007), and anthropogenic disturbance (Peres, 1990; Ganzhorn and Schmid, 1998; Anzures-Dadda and Manson, 2007; Peres and Palacios, 2007). Despite the wide range of species and habitats studied, few consistent patterns have emerged that explain spatial variations in primate density and abundance. Moreover, those patterns that have found statistical support tend to have been focused on large-bodied, diurnal species, leaving many unanswered questions on the conservation biogeography of small-bodied, nocturnal taxa (McGoogan et al., 2007).
Food availability
Food availability typically refers to temporal and spatial variations in food quantity and quality, and has long been considered one of the main drivers of primate abundance and density. Despite extensive investigations into the relationship between food quality and amount and primate density and abundance (Hanya and Chapman, 2012), it is often difficult to determine quantitatively rigorous measures of food availability. This issue arises due to the high plant diversity at many primate research sites in the tropics, as well as stochastic variations in the temporal availability of food resources. Many researchers have employed plant dendrometrics as proxies for food availability, such as diameter at breast height (DBH), basal area, and stem density (e.g., Wieczkowski, 2004; Anzures-Dadda and Manson, 2007; Grow et al., 2013).
- Type
- Chapter
- Information
- The Dwarf and Mouse Lemurs of MadagascarBiology, Behavior and Conservation Biogeography of the Cheirogaleidae, pp. 477 - 497Publisher: Cambridge University PressPrint publication year: 2016
References
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