Analysis of Predator Movement in Prairie Landscapes With Contrasting Grassland Composition

Phillips, Michael L.; Clark, William R.; Nusser, Sarah M.; Sovada, Marsha A.; Greenwood, Raymond J.

doi:10.1644/1545-1542(2004)085<0187:aopmip>2.0.co;2

Cited by 59 publications

(56 citation statements)

References 32 publications

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“…By this reasoning the most dangerous competitor firms surrounding a focal firm will be fractally structured. Many studies of competitive biological predator/prey ecosystems (we cite 19 here) show repeatedly that they have fractal structures (McMahon and Bonner, 1983;Schmidt-Nielsen, 1984;Aronson, 1992;Russell et al, 1992;Niklas, 1994;Tsuda, 1995;West et al, 1997;Solé et al, 2001;Cuddington and Yodzis, 2002;Haskell et al, 2002;Shinchi et al, 2002;Xiao et al, 2002;Hoddle, 2003;Liu and Chen, 2003;Ferguson, 2004;Laidre et al, 2004;Phillips et al, 2004;Tremblay et al, 2007;Sims et al, 2008).…”

Section: Requisite Fractal Structure From Underlying Scale-free Theorymentioning

confidence: 99%

When organisations and ecosystems interact: toward a law of requisite fractality in firms

McKelvey¹,

Lichtenstein²,

Andriani³

2012

IJCLM

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Abstract:Complexity science has evolved greatly in the past 30 years, starting from its European roots in Prigogine's dissipative structures model of phase transitions, continuing through the Santa Fe School's focus on self-organised adaptation as explained through computational simulations, and now to it's most recent focus on power laws and their basis in scale-free causes. After briefly reviewing these three approaches to complex systems, we attempt to integrate them into a broad-based model of organisational design and performance. Our model develops the law of 'requisite fractality' -an updated version of Ashby's original law for organisations in dynamic environments. Implications for organisations and managers are discussed.

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Section: Requisite Fractal Structure From Underlying Scale-free Theorymentioning

confidence: 99%

When organisations and ecosystems interact: toward a law of requisite fractality in firms

McKelvey¹,

Lichtenstein²,

Andriani³

2012

IJCLM

View full text Add to dashboard Cite

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“…Although our observations on these revisitation events are too sparse to draw firm conclusions, it is in general not uncommon for predators to memorize and revisit locations of potentially profitable patches and thus learn about prey refuge use (Day and Elwood 1999;Heymann 1995). For example, spatial memory has been linked to eggpredating crows revisiting nest sites where they had prior predation success (Sonerud and Fjeld 1987) and for red foxes that quickly move between different (previously visited) profitable patches to increase their foraging efficiency (Phillips et al 2004).…”

Section: Discussionmentioning

confidence: 99%

Prey refuges as predator hotspots: ocelot (Leopardus pardalis) attraction to agouti (Dasyprocta punctata) dens

et al. 2013

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We tested the hypothesis that prey refuges attract predators, leading to elevated predator activity in the vicinity of refuges. We used camera traps to determine whether the spatial activity of a predator, the ocelot (Leopardus pardalis), was biased toward refuge locations of its principal prey, the agouti (Dasyprocta punctata). We radio-tracked agoutis at night to locate active refuges and compared the activity of ocelots between these refuges and surrounding control grid locations. We found that ocelots visited the area near agouti refuges significantly more often and for longer periods of time than control locations, and that they actively investigated the refuge entrances. Both occupied and unoccupied refuges were visited, but the duration of inspection was longer at occupied refuges. As the ocelots could probably not see the agoutis within the refuges, olfaction likely cued foraging ocelots. Two refuges were repeatedly visited by the same ocelots on different days, suggesting spatial memory. Overall, our results suggest that predators can be attracted to prey refuges or refuging prey. The benefits to prey of staying nearby a refuge would thus be counterbalanced by higher likelihoods of predator encounter. This should stimulate prey to use multiple refuges alternatingly and to not enter or exit refuges at times of high predator activity.

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“…Understanding the variation in the use of space by large and midsized mammals in this mosaic of vegetation types is fundamental to the comprehension of the effects of flood seasonality over the community structure (Phillips et al 2004). …”

Section: Introductionmentioning

confidence: 99%

Flood-mediated use of habitat by large and midsized mammals in the Brazilian Pantanal

et al. 2013

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DE LÁZARI, P.R., SANTOS-FILHO, M., CANALE, G.R. & GAIPEL, M.E. Flood-mediated use of habitat by large and midsized mammals in the Brazilian Pantanal. Biota Neotrop. 13(2): http://www.biotaneotropica. org.br/v13n2/en/abstract?article+bn02713022013 Abstract:The Brazilian Pantanal comprises a mosaic of forest and field environments harbouring a rich community of large and midsized mammals that are adapted to the annual hydrological cycle. Here we evaluated richness and composition of large and midsized mammals inhabiting forested and open habitats affected by yearly floods in the Pantanal in Cáceres from October 2009 to September 2010. We compared these communities in marshes, dry forests and riparian forests based on 640 camera-traps.nights, sights, tracks, faecal samples and interviews. We also compared results in a private land (Descalvados Farm) and in a protected area (Taiamã Ecological Station). In total, we sampled 26 large and midsized mammals, including five threatened and two near threatened species. Jaguars, collared peccaries and red-brocket deers were the only mammals recorded at all habitat types, while eleven species were recorded exclusively in one of the habitats. We identified a heterogeneous use of the habitat by the animal community surveyed in all three habitats during the wet and dry season. Furthermore, precipitation and river level affected the use of dry forests and marshes isolated from dry forests. Finally, 62% of large/midsized mammal species present in the surveyed region recorded outside the reserve; therefore, we recommend conservation actions to protect those species and also to preserve unprotected dry forests. Resumo: O Pantanal brasileiro é formado por um mosaico de ambientes florestados e campestres, abrigando uma rica comunidade de mamíferos de médio e grande porte adaptados ao ciclo hidrológico anual. Nós avaliamos a riqueza e composição de mamíferos de médio e grande porte em habitats florestados e campestres afetados pelas inundações anuais no Pantanal de Cáceres ente outubro/2009 e setembro/2010. Comparamos as comunidades em Campos Inundáveis, Matas Secas e Matas Ripárias com base em 640 armadilhas-fotográficas.noite, avistamentos, pegadas, amostras fecais e entrevistas. Nós também comparamos os resultados em uma área privada (Fazenda Descalvados) e em uma área protegida (Estação Ecológica Taiamã). No total, foram registradas 26 espécies de mamíferos de médio e grande porte, incluindo cinco espécies ameaçadas de extinção e duas quase ameaçadas. Onças-pintadas, catetos e veados-mateiro foram os únicos mamíferos registrados em todos os habitats, enquanto que 11 espécies foram registradas em apenas um tipo de hábitat. Identificamos diferença quanto ao uso dos habitats entre os três tipos de habitats durante a estação seca e chuvosa. Além disso, a precipitação e o nível do rio afetaram o uso da Mata Seca e Campos Inundáveis isolados das Matas Secas. Por fim, 62% das espécies foram registradas fora da reserva, por isso, recomendamos ações de conservação para proteger as espécies ...

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Analysis of Predator Movement in Prairie Landscapes With Contrasting Grassland Composition

Cited by 59 publications

References 32 publications

When organisations and ecosystems interact: toward a law of requisite fractality in firms

When organisations and ecosystems interact: toward a law of requisite fractality in firms

Prey refuges as predator hotspots: ocelot (Leopardus pardalis) attraction to agouti (Dasyprocta punctata) dens

Flood-mediated use of habitat by large and midsized mammals in the Brazilian Pantanal

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