Changes in rodent community structure in the Chihuahuan Desert México: comparisons between two habitats

Hernández, Lucina; Romero, Alberto González; Laundré, John W.; Lightfoot, David C.; Aragón, Elizabeth E.; Portillo, Jorge López

doi:10.1016/j.jaridenv.2004.03.013

Cited by 39 publications

(30 citation statements)

References 22 publications

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“…However, similar seasonal patterns of rodent species composition (i.e., increased species richness in the dry season) have been recorded in southern Africa (Mahlaba and Perrin 2003, Monadjem and Perrin 2003, Schradin and Pillay 2006. One reason may be a delayed response in the temporal availability of resources (Hansen et al 1999, Hernández et al 2005. Additionally, the higher food availability may have rendered the bait in traps less attractive to the rodents during the wet season than during the dry season when food abundance is low (Monadjem 1999a, dos Santos-Filho et al 2006.…”

Section: Discussionmentioning

confidence: 60%

Ecological correlates of small mammal assemblage structure at different spatial scales in the savannah biome of South Africa

Delcros

Taylor²,

Schoeman

2014

Mammalia

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Abstract:We sampled the seasonal diversity of rodents and shrews in two neighboring game reserves in the savannah biome and assessed the influence of competition and abiotic processes on species composition patterns at habitat and reserve scales. We used null models and multivariate analyses to test whether the observed patterns differed significantly from those expected by chance. Species richness estimators indicated that rodent and shrew inventories were relatively complete. Rarefaction curves showed that small mammal species richness was higher at the Mkhuze Game Reserve than the Kube Yini Game Reserve, though it was highest in the Acacia woodlands. Rodent diversity was highest during winter. Rodent and shrew species composition was significantly correlated with grass height, tree density, and ground cover. Furthermore, rodent and shrew assemblages were nested at the reserve scale. Only nestedness at the broadest scale (both reserves, both seasons combined) was significantly correlated with landscape and microhabitat variables. Conversely, there was little evidence that competition influenced rodent and shrew species composition. Results showed that species composition patterns of small mammals in the savannah biome are related to abiotic processes operating at local and regional scales, suggesting that microhabitat characteristics and regional processes like immigration and extinction drive assemblage structure.

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Section: Discussionmentioning

confidence: 60%

Ecological correlates of small mammal assemblage structure at different spatial scales in the savannah biome of South Africa

Delcros

Taylor²,

Schoeman

2014

Mammalia

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“…Los roedores son el grupo de mamíferos con mayor diversidad de especies en la RBM, dentro de las que destacan particularmente Dipodomys merriami, D. nelsoni y Neotoma leucodon porque de ellas se obtuvieron el mayor número de fotografías, lo cual indica que éstas han sido reconocidas como dominantes o subdominantes en el área (Hernández et al 2005;2011a). En el caso particular de las ratas nopaleras (N. leucodon) éstas eran poco abundantes entre los años de 1997 a 2001 (Hernández et al 2005;2011a), su número se ha incrementado recientemente y actualmente son muy abundantes en las áreas de matorral y pastizal de la RBM.…”

Section: Orden Lagomorphaunclassified

“…En el caso particular de las ratas nopaleras (N. leucodon) éstas eran poco abundantes entre los años de 1997 a 2001 (Hernández et al 2005;2011a), su número se ha incrementado recientemente y actualmente son muy abundantes en las áreas de matorral y pastizal de la RBM. Esta situación está directamente relacionada con las condiciones ambientales, en particular los niveles de precipitación, que ha favorecido el incremento poblacional de estos organismos cuando el nivel de lluvia es alto y hay abundante de alimento (Hernández et al 2005(Hernández et al y 2011a.…”

Section: Orden Lagomorphaunclassified

Registro de presencia y actividades de algunos mamíferos en el Desierto Chihuahuense, México

Elizalde‐Arellano

López‐Vidal

Hernández

et al. 2014

Therya

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“…Under this paradigm we assumed that presences occur in suitable habitat, whereas absences do not. Microhabitat selection and resource availability hypotheses (see Hernández et al 2005) were treated as second-order effects at regional scales, and not considered. Although this is the fi rst study to defi ne habitat associations influencing the occurrence of small grounddwelling mammals in the Pilbara quantitatively, the results here generally concur with qualitative descriptions of preferred habitat, both within this region (Dunlop and Sawle 1983;How and Cooper 2002;Biota Environmental Sciences 2005;Bamford Consulting Ecologists 2005) and elsewhere in Australia where the species are distributed more widely (McKenzie et al 2000;Van Dyck and Strahan 2008).…”

Section: Habitat Associationsmentioning

confidence: 99%

Environmental associations of small ground-dwelling mammals in the Pilbara region, Western Australia

Gibson¹,

McKenzie²

2009

Rec West Aust Mus Sup

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-Small (< 50 g) ground-dwelling mammals were sampled as a part of a larger survey of the Pilbara biogeographic region in Western Australia. Environmental attributes infl uencing the probability of occurrence of individual small mammal species were identifi ed using the multivariate adaptive regression splines (MARS) modelling approach. Interpretation of co-occurrence patterns, based on known habitat associations throughout wider ranges in the Pilbara and/or elsewhere in Australia, was used to facilitate comparisons of sub-sets of the species models. Eighteen species were recorded during this study (mean of 3.4 per survey site [range: 0-7]), but only 14 had suffi cient survey records to construct models with reasonable certainty. Complex, non-linear responses were observed for most of the MARS species models, with model performance higher for species with a restricted distribution than the more widely ranging species. Species co-occurrence patterns appeared to be best explained by substrate with three alignments linking species that tend to occur on increasingly sandy, clayey and rocky substrates. Similarly, variables describing the substrate were consistently and strongly represented in the models, indicating that these mammals partition their habitat on substrate type at the local scale in the Pilbara. Climate attributes added little information to the models, although distance to the coast, a surrogate for a range of climatic infl uences, was important for some species. That all species previously known to occur in this region were recorded in the current study suggests that this fauna is still intact, despite a variety of factors (e.g. pastoralism, weed invasion, inappropriate fi re regimes and mining) that have been transforming the region's ecology for more than a century.

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Changes in rodent community structure in the Chihuahuan Desert México: comparisons between two habitats

Cited by 39 publications

References 22 publications

Ecological correlates of small mammal assemblage structure at different spatial scales in the savannah biome of South Africa

Ecological correlates of small mammal assemblage structure at different spatial scales in the savannah biome of South Africa

Registro de presencia y actividades de algunos mamíferos en el Desierto Chihuahuense, México

Environmental associations of small ground-dwelling mammals in the Pilbara region, Western Australia

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