Density-dependent habitat selection: Testing the theory with fitness data

Morris, Douglas W.

doi:10.1007/bf02147934

Cited by 149 publications

(154 citation statements)

References 43 publications

Supporting

Mentioning

144

Contrasting

Unclassified

Order By: Relevance

“…We propose that the D. antillarum distribution patterns observed in this study, when combined with temporal data ( Van der Hal, 2005;Debrot and Nagelkerken, 2006), and observed differences in ecosystem characteristics between habitat types, are in line with expectations from the theory of density-dependent habitat selection (see Fretwell and Lucas, 1969;Fretwell, 1972;Morris, 1989;Shepherd and Litvak, 2004). Our data elucidate potential mechanisms by which sheltered, lagoon, and backreef habitats confer higher levels of fitness on D. antillarum than forereefs.…”

Section: Evidence For Density-dependent Habitat Selectionsupporting

confidence: 87%

Does Slow and Variable Recovery of Diadema antillarum on Caribbean Fore-Reefs Reflect Density-Dependent Habitat Selection?

Rogers

Lorenzen

2016

Front. Mar. Sci.

View full text Add to dashboard Cite

Recovery of the Caribbean long-spined sea urchin Diadema antillarum from the pathogen-induced mass mortality event of 1983 has been slow and variable. Multiple studies indicate that post-mortality population densities are greatest in sheltered lagoon and back reef habitats, and that recovery is limited on forereefs where pre-mortality densities were also high (Miller R. J. et al., 2003;Van der Hal, 2005;Debrot and Nagelkerken, 2006;Steiner and Williams, 2006;Vermeij et al., 2010). We carried out detailed surveys of a recovering population of D. antillarum in Curacao to document an ongoing influence of habitat type on population density, and to explore what ecosystem characteristics might drive observed recovery patterns. We quantified D. antillarum population density, larval settlement rates, herbivorous fish biomass, algal turfs, macroalgae, and predatory fish biomass in sites with and without structural complexity on reefs in sheltered lagoon and backreef locations, and on the forereef, using an orthogonal survey design. D. antillarum densities were greatest in sheltered lagoon and backreef locations, with high structural complexity. However, densities were significantly lower than those reported prior to the mass mortality event. Larval settlement rates were greater in sheltered lagoon and backreef locations but did not fully account for observed patterns in urchin density. Sheltered lagoon and backreef habitats had more turf algae and fewer herbivorous fish than forereef habitats. Predator abundance was generally low and did not differ significantly among habitat types. In light of our results, we hypothesize that patterns of D. antillarum recovery in Curacao are consistent with dynamics expected in the presence of density-dependent habitat selection. More algal resources and fewer herbivorous fish provide a mechanism for increased fitness and habitat suitability in sheltered, lagoon, and backreef habitats. Forereefs, by contrast, offer reduced habitat suitability and, we hypothesize, will only be re-colonized once the carrying capacity of more favorable habitats is exceeded. We propose a number of testable predictions to explore this theory further, and advocate for including sheltered lagoon and backreef habitats in D. antillarum population surveys to monitor recovery, as well as protecting populations found in these habitats where necessary. We predict that when current Rogers and Lorenzen Density Dependent Habitat Selection in Diadema antillarum populations return to pre-mortality densities, range expansion may allow for a return of D. antillarum to Caribbean forereefs.

show abstract

Section: Evidence For Density-dependent Habitat Selectionsupporting

confidence: 87%

Does Slow and Variable Recovery of Diadema antillarum on Caribbean Fore-Reefs Reflect Density-Dependent Habitat Selection?

Rogers

Lorenzen

2016

Front. Mar. Sci.

View full text Add to dashboard Cite

show abstract

“…Los costos y beneficios de dispersión varían en el tiempo y en el espacio entre los individuos de cada especie (Bowler and Benton 2005). El principal beneficio es evitar la competencia intraespecífica en el sitio actual y ocupar hábitats subexplotados, mientras que el principal costo es la mortalidad durante ese movimiento dispersivo (Morris 1989(Morris , 1991. En consecuencia, el balance será reflejado en el éxito reproductivo individual en respuesta a la decisión de dispersarse (Moenting and Morris 2006).…”

Section: Mj Monteverde and K Hodaraunclassified

Movimientos de roedores intra- e inter-ambiente y riesgo de exposición al Hantavirus "Andes" en Patagonia norte, Argentina

Monteverde¹,

Hodara

2017

Ecol. Austral

View full text Add to dashboard Cite

RESUMEN.Se estudiaron algunos aspectos de la ecología espacial de tres especies de roedores sigmodontinos (Oligoryzomys longicaudatus, Abrothrix olivacea y Abrothrix hirta) en el Paraje El Contra del Parque Nacional Lanín (Provincia de Neuquén, Argentina). Los resultados se analizaron en el marco del riesgo de exposición humana al Hantavirus "Andes", agente causal del Síndrome Pulmonar por Hantavirus. El trabajo se realizó en dos tipos de ambiente: silvestre y doméstico. Los roedores fueron capturados mensualmente con la metodología de captura-marcado-recaptura. De esta manera se estimaron y compararon los movimientos dentro y entre ambos ambientes y los tamaños de áreas de acción. Oligoryzomys longicaudatus, principal reservorio del Hantavirus "Andes" en Patagonia, presentó el mayor número de capturas en ambos ambientes y más de lo esperado por azar dentro de los ambientes domésticos. Además, mostró las áreas de acción con menor tamaño promedio y movimientos intra-ambiente estadísticamente significativos. Los ambientes domésticos rurales resultaron ser potencialmente los más riesgosos en términos de exposición y transmisión de Hantavirus a humanos. Como resultado de las capturas y movimientos dispersivos de O. longicaudatus, se discuten otras contribuciones de este trabajo a la salud humana.[Palabras clave: dispersión, ambientes domésticos y silvestres, Oligoryzomys longicaudatus, Parque Nacional Lanín, sigmodontinae, uso de hábitat, zoonosis]ABSTRACT. Intra-and inter-environment movements of rodents and risk of exposure to "Andes" Hantavirus in northern Patagonia, Argentina. Some aspects of the spatial ecology of three species of sigmodontine rodents (Oligoryzomys longicaudatus, Abrothrix olivacea and Abrothrix hirta) were studied in the Paraje El Contra, Lanín National Park (Province of Neuquén, Argentina), and the results were then analyzed in relation to the risk of human exposure to "Andes" Hantavirus, causative agent of Hantavirus Pulmonary Syndrome. The work was conducted in two environment types (sylvan and domestic), where mice were monthly captured using capture-mark-recapture methodology. Thus, movements within and between environments and home ranges sizes were estimated and compared. Oligoryzomys longicaudatus, principal reservoir of "Andes" Hantavirus in Patagonia, showed the largest number of captures in both environments and more captures than those expected by random within domestic environments. Moreover, it showed the lowest average home range sizes, and statistically significant intra environment movements. Rural domestic environments resulted to be the riskiest in terms of exposure and transmission of Hantavirus to humans. Other contributions of this work to human health are discussed as a result of captures and dispersal movements of O. longicaudatus.

show abstract

“…We thus expect habitat selection to be densitydependent (Rosenzweig 1981;Morris 1989). Under density dependence, animals select habitats based on the intrinsic quality (perceived) of the habitat, yet experience realized fitness that is lower because of competition with conspecifics.…”

Section: Habitat Habitat Use and Habitat Selection (A)mentioning

confidence: 99%

Habitat–performance relationships: finding the right metric at a given spatial scale

Gaillard

Hebblewhite

Loison

et al. 2010

Phil. Trans. R. Soc. B

282

306

View full text Add to dashboard Cite

The field of habitat ecology has been muddled by imprecise terminology regarding what constitutes habitat, and how importance is measured through use, selection, avoidance and other bio-statistical terminology. Added to the confusion is the idea that habitat is scale-specific. Despite these conceptual difficulties, ecologists have made advances in understanding 'how habitats are important to animals', and data from animal-borne global positioning system (GPS) units have the potential to help this clarification. Here, we propose a new conceptual framework to connect habitats with measures of animal performance itself-towards assessing habitat -performance relationship (HPR). Long-term studies will be needed to estimate consequences of habitat selection for animal performance. GPS data from wildlife can provide new approaches for studying useful correlates of performance that we review. Recent examples include merging traditional resource selection studies with information about resources used at different critical life-history events (e.g. nesting, calving, migration), uncovering habitats that facilitate movement or foraging and, ultimately, comparing resources used through different life-history strategies with those resulting in death. By integrating data from GPS receivers with other animal-borne technologies and combining those data with additional life-history information, we believe understanding the drivers of HPRs will inform animal ecology and improve conservation.

show abstract

Density-dependent habitat selection: Testing the theory with fitness data

Cited by 149 publications

References 43 publications

Does Slow and Variable Recovery of Diadema antillarum on Caribbean Fore-Reefs Reflect Density-Dependent Habitat Selection?

Does Slow and Variable Recovery of Diadema antillarum on Caribbean Fore-Reefs Reflect Density-Dependent Habitat Selection?

Movimientos de roedores intra- e inter-ambiente y riesgo de exposición al Hantavirus "Andes" en Patagonia norte, Argentina

Habitat–performance relationships: finding the right metric at a given spatial scale

Contact Info

Product

Resources

About