Recruiting mechanisms of Cylindropuntia leptocaulis (Cactaceae) in the Southern Chihuahuan Desert

Flores‐Torres, Arnoldo; Montaña, Carlos

doi:10.1016/j.jaridenv.2012.04.006

Cited by 18 publications

(25 citation statements)

References 53 publications

(68 reference statements)

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“…This result agrees with other studies in semiarid environments which record that there is a higher density of the herbaceous component in open segments, where sunlight directly reaches the herbaceous stratum, facilitating recruitment (Crozier, & Boerner, 1984;Kessler, 1992;Belsky, 1994;Aguilera, & Lauenroth, 1995;Mordelet, & Menaut, 1995;Silva et al, 2008;Flores-Torres, & Montaña, 2012).…”

Section: Discussionsupporting

confidence: 93%

“…On the other hand, Pseudabutilon spicatum showed no significant difference in density, number of births, number of dead individuals and between areas or microhabitats, indicating that the different conditions of microhabitat ("under the canopy" and "between canopies") did not influence the dynamics of the species. Some authors admit that other abiotic factors, such as local climatic characteristics and/or rainfall, may change the plasticity of the species over time (Belsky, 1990;Salo, 2004;Wang, 2005;Flores-Torres, & Montaña, 2012;García-Cháves et al, 2014). It is possible that this may have occurred to P. spicatum, but it is also possible that light, either between canopies or under the canopy, is not a critical factor in the dynamics of this population, and consequently, this species may not be considered a good model for assessing the impact of human actions on the recovery of abandoned areas.…”

Section: Discussionmentioning

confidence: 99%

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Influencia de microhábitats en el desempeño de especies herbáceas en áreas de bosque maduro y secundario en la región semiárida de Brasil

Andrade

Silva

Santos

et al. 2015

RBT

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Abstract:The conditions for plant establishment in mature forest are different from those found in disturbed areas. In dry environments, the herbaceous cover is the most important in the recolonization of deforested areas. It can, therefore, act as an ideal biological group for assessing how changes in habitat heterogeneity affect the resilience of dry forests. The aim of this research was to evaluate whether natural regeneration of the herbaceous stratum differed between areas of mature and secondary forest of Caatinga and to describe this process. The study took place in the Brazilian semiarid region during the rainy season 2011 (January to August), where fifty 1m² plots were set up, 25 allocated to the microhabitat established as "between canopies" and 25 to the microhabitat "under the canopy". The herbaceous species selected for the study were Delilia biflora (Asteraceae), Gomphrena vaga (Amaranthaceae) and Pseudabutilon spicatum (Malvaceae), abundant species occurring in both areas. All individuals from the selected populations were counted, marked with sequential numbers, and the height of the stem was measured. Differences between areas, and in size and survival between microhabitats, were found only for the first two species. Fruit production was higher in the mature forest for the three species. The study concluded that: 1. The effect of the microhabitats "between canopies" and "under the canopy" in mature and secondary forest areas depends on the species considered; 2. Populations sensitive to light intensity differ in number of individuals, height and fruit production; and 3. The resilience of anthropogenic areas in semiarid environments can be characterized by the presence of spatial heterogeneity with regard to the emergence and survival of herbaceous seedlings, suggesting that the regeneration of disturbed areas may occur in patches. Rev. Biol. Trop. 63 (2): 357-368. Epub 2015 June 01.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Influencia de microhábitats en el desempeño de especies herbáceas en áreas de bosque maduro y secundario en la región semiárida de Brasil

Andrade

Silva

Santos

et al. 2015

RBT

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“…These phytogenic mounds are the habitat of many clonal plants that perform advantageous clonal reproduction [4], [5] through layering modules. The whole clonal plant can increase its survival and regenerate through layering.…”

Section: Introductionmentioning

confidence: 99%

Effects of Aspect on Clonal Reproduction and Biomass Allocation of Layering Modules of Nitraria tangutorum in Nebkha Dunes

et al. 2013

PLoS ONE

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The formation of many nebkha dunes relies on the layering of clonal plants. The microenvironmental conditions of such phytogenic nebkha are heterogeneous depending on the aspect and slope. Exploring the effects of aspect on clonal reproduction and biomass allocation can be useful in understanding the ecological adaptation of species. We hypothesized that on the windward side layering propagation would be promoted, that biomass allocation to leaves and stems of ramets would increase, and that the effects of aspect would be greater in the layering with larger biomass. To test these hypotheses, we surveyed the depth of germination points of axillary buds, the rate of ramet sprouting, the density of adventitious root formation points, and the biomass of modules sprouting from layering located on the NE, SE, SW and NW, aspects of Nitraria tangutorum nebkhas. The windward side was located on the NW and SW aspects. The results indicated that conditions of the NW aspect were more conducive to clonal reproduction and had the highest rate of ramet sprouting and the highest density of adventitious formation points. For the modules sprouting from layering on the SW aspect, biomass allocation to leaves and stems was greatest with biomass allocation to adventitious roots being lowest. This result supported our hypothesis. Contrary to our hypothesis, the effects of aspect were greater in layering of smaller biomass. These results support the hypothesis that aspect does affect layering propagation capacity and biomass allocation in this species. Additionally, clonal reproduction and biomass allocation of modules sprouting from layering with smaller biomass was more affected by aspect. These results suggest that the clonal growth of N. tangutorum responses to the microenvironmental heterogeneity that results from aspect of the nebkha.

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“…Studies of the population dynamics of herbaceous species in dry (Miller and Duncan, 2003;Santos et al, 2013b;Vega and Montaña, 2004;Volis et al, 2004;Wang, 2005) and wet forests (Baeten et al, 2009;Flores-Torres and Montaña, 2012;Kolb et al, 2007;Pino et al, 2007;Suzuki et al, 2003;) around the world have shown that heterogeneity in establishment conditions (microhabitats) for seedlings may limit population sizes and occurrence. This phenomenon was observed for some herbaceous populations in the dry forest (Caatinga) of Brazil (Andrade et al, 2007;Araújo et al, 2005;Lima et al, 2007;Reis et al, 2006;Santos et al, 2012;Silva et al, 2008), and it was also observed in this study.…”

Section: Microhabitats Vs Densitymentioning

confidence: 99%

“…There are many environmental factors that can affect the population sizes of herbaceous species in dry habitats (Forbis et al, 2004;Nippert et al, 2006;Silva et al, 2011;Souza et al, 2014), but the variation of annual rainfall is the most important and most discussed factor in the literature (Flores-Torres and Montaña, 2012;Nippert et al, 2006;Santos et al, 2013b;Volis et al, 2004;Wang, 2005). However, microhabitat types are quite diverse in dry habitats, and such diversity may allow different factors to determine and modulate population dynamics (Forbis et al, 2004;García-Cháves et al, 2014;Miller and Duncan, 2003;Vega and Montaña, 2004;Wang, 2005).…”

Section: Introductionmentioning

confidence: 99%

The influence of microhabitat on the population dynamics of four herbaceous species in a semiarid area of northeastern Brazil

et al. 2016

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Variation in annual rainfall is considered the most important factor influencing population dynamics in dry environments. However, different factors may control population dynamics in different microhabitats. This study recognizes that microhabitat variation may attenuate the influence of climatic seasonality on the population dynamics of herbaceous species in dry forest (Caatinga) areas of Brazil. We evaluated the influence of three microhabitats (flat, rocky and riparian) on the population dynamics of four herbaceous species (Delilia biflora, Commelina obliqua, Phaseolus peduncularis and Euphorbia heterophylla) in a Caatinga (dry forest) fragment at the Experimental Station of the Agronomic Research Institute of Pernambuco in Brazil, over a period of three years. D. biflora, C. obliqua and P. peduncularis were found in all microhabitats, but they were present at low densities in the riparian microhabitat. There was no record of E. heterophylla in the riparian microhabitat. Population size, mortality rates and natality rates varied over time in each microhabitat. This study indicates that different establishment conditions influenced the population size and occurrence of the four species, and it confirms that microhabitat can attenuate the effect of drought stress on mortality during the dry season, but the strength of this attenuator role may vary with time and species.Keywords: demography, density, herb, mortality, natality, spatial variation.A influência dos microhabitats sobre a dinâmica de populações de quatro espécies herbáceas em uma área semiárida no nordeste do Brasil

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Recruiting mechanisms of Cylindropuntia leptocaulis (Cactaceae) in the Southern Chihuahuan Desert

Cited by 18 publications

References 53 publications

Influencia de microhábitats en el desempeño de especies herbáceas en áreas de bosque maduro y secundario en la región semiárida de Brasil

Influencia de microhábitats en el desempeño de especies herbáceas en áreas de bosque maduro y secundario en la región semiárida de Brasil

Effects of Aspect on Clonal Reproduction and Biomass Allocation of Layering Modules of Nitraria tangutorum in Nebkha Dunes

The influence of microhabitat on the population dynamics of four herbaceous species in a semiarid area of northeastern Brazil

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