Mineral Content of Guajillo Regrowth following Roller Chopping

Fulbright, Timothy E.; Reynolds, J. L.; Beasom, Samuel L.; Demarais, Stephen

doi:10.2307/4002757

Cited by 13 publications

(11 citation statements)

References 5 publications

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“…Roller‐chopping uses a cylindrical, water‐filled drum equipped with blades towed behind a tractor to cut and crush woody vegetation at the soil surface (Fulbright et al. , Blanco et al. ).…”

Section: Methodsmentioning

confidence: 99%

“…We used roller-chopping with a pasture aerator (Lawson Manufacturing, now RanchWorx, Palm Harbor, Florida, USA) in mechanically treated plots. Roller-chopping uses a cylindrical, water-fi lled drum equipped with blades towed behind a tractor to cut and crush woody vegetation at the soil surface (Fulbright et al 1991, Blanco et al 2005. We chose roller-chopping rather than other mechanical methods for this study because, together with the cut-herbicide and control treatments, it provided a gradient of soil disturbance with high disturbance from roller-chopping, low soil disturbance from the cut-herbicide treatment, and no soil disturbance in control plots.…”

Section: Experimental Designmentioning

confidence: 99%

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Shrubland resilience varies across soil types: implications for operationalizing resilience in ecological restoration

Wonkka

West

Rogers

2016

Ecological Applications

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In ecosystems with alternative stable states, restoration success can be thought of as overcoming the resilience of an undesirable state to promote an alternative state that yields greater ecosystem services. Since greater resilience of undesirable states translates into reduced restoration potential, quantifying differences in resilience can enhance restoration planning. In the context of shrub-encroached rangeland restoration, shrubland resilience is the capacity of a woody vegetated state to absorb management interventions designed to produce a more desirable grass-dominated state, and remain within its current regime. Therefore, differences in the resilience of a state can be quantified in a relative sense by measuring whether a state switches to an alternate state following perturbation or remains in its current stability domain. Here we designed an experimental manipulation to assess the contribution of soils to differences in the relative resilience of a shrub-invaded state. In this large-scale experiment, we repeated perturbations across a gradient of soil textures to inform restoration practitioners of differences in the relative resilience of shrubland occurring on different soil types to common rangeland restoration practices. On each soil type, we compared the relative ability of the shrubland state to withstand chemical and mechanical brush control treatments, commonly employed in this study region, to untreated controls. While the shrubland community composition did not differ prior to the study, its capacity to absorb and recover from brush removal treatments depended on soil type. Shrubland resilience to chemical and mechanical brush removal was highest on coarse soils. On these soils, brush removal temporarily restored grassland dominance, but woody plants quickly regained pretreatment levels of dominance. However, shrublands on fine soils did not recover following treatments, continuing to be grass-dominated for the duration of the study. This study highlights a simple approach for prioritizing restoration actions by mapping the locations of different soil attributes that support shrub-dominated states with differing levels of resilience to brush control. This experimental approach provides a basis for operationalizing resilience in restoration and prioritizing management actions across a range of environmental conditions, which is critical given the economic constraints associated with broad-scale mechanical and chemical interventions for rangeland restoration.

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Section: Methodsmentioning

confidence: 99%

Section: Experimental Designmentioning

confidence: 99%

Shrubland resilience varies across soil types: implications for operationalizing resilience in ecological restoration

Wonkka

West

Rogers

2016

Ecological Applications

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“…Chemical changes in the regrowth vegetation are typically short‐lived responses. For example regrowth shoots of Acacia berlandieri increased in crude protein, in vitro organic matter digestibility, and P and K content for about 6–8 months after disturbance (Fulbright et al 1991, Reynolds et al 1992). Morphological changes in the regrowth architecture of plants, such as increased branching or spine production, following mechanical damage are more permanent changes.…”

mentioning

confidence: 99%

The architecture of shrubs after defoliation and the subsequent feeding behavior of browsers

Cooper¹,

Owens²,

Spalinger³

et al. 2003

Oikos

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We examined regrowth architecture of 4 species of savanna shrubs following 4 levels of defoliation. Defoliation had little effect on the regrowth architecture of honey mesquite (Prosopis glandulosa), which is rarely browsed by mammalian herbivores. The 3 acacia species (Acacia berlandieri, A. greggii, A. schaffneri) responded to defoliation by increasing leaf and spine density on the regrowth branches, but spine length and branching architecture remained unchanged. Only A. greggii, which is a preferred food plant of many browsers, exhibited an increase in the number and length of current annual growth branches in response to defoliation. The changes in plant architecture due to defoliation had little effect on the subsequent feeding behavior of captive white‐tailed deer (Odocoileus virginianus). Food intake rate of the deer was most strongly related to internode distance, a parameter not significantly altered by defoliation. This suggests that the architectural responses of these shrubs to defoliation may not provide increased defense against browsing by co‐evolved mammals.

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“…In South Texas, woody vegetation is a primary component of white tailed deer (Odocoileus virginianus Boddaert) diet (Arnold and Drawe 1979, Taylor et al 1997). Mechanical top removal methods have been shown to increase crude protein, phosphorous, and potassium content of browse species preferred by white tailed deer (Everitt 1983, Fulbright et al 1991. Woody plants are also an important cover source for northern bobwhite (Colinus virginianus L.) (Guthrey 1986), and provide escape cover and thermal refugia to species of concern such as Texas tortoise (Gopherus berlandieri Stejneger) (Kazmaier 2000) and Texas horned lizard (Phrynosoma cornutum Gray) (Burrow et al 2001 (Stevens and Arriaga 1985).…”

Section: Land Ownership and Land Use Practicesmentioning

confidence: 99%

Vegetation response of a mesquite-mixed brush community to aeration

Ruthven¹,

Krakauer²

2004

REM

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Responses of plant communities to mechanical treatments such as aeration on semiarid rangelands are not clearly understood. Our objective was to compare woody and herbaceous plant cover, density, and diversity on aerated and nontreated rangelands. Five rangeland sites that were aerated with a double /tandem drum aerator during summer 1998 and 5 sites of nontreated rangeland were selected for study on the Chaparral Wildlife Management Area, La Salle County, Tex. Woody plant cover was estimated using the line-intercept method, and stem density was estimated in 30 x 1.5 m plots in 1999 and 2000. Forb and grass cover and density were estimated in 20 x 50 cm quadrats during spring and fall 1999. Woody and herbaceous plant diversity did not differ between treatments. On aerated sites percent woody plant cover was 4-fold less 1-year after aeration and increased 89% from the first to the second growing-season post treatment. Canopy cover of honey mesquite (Prosopis glandulosa Torr.), twisted acacia (Acacia schaffneri S. Wats.), and Texas pricklypear (Opuntia lindheimeri Engelm.) was greater on nontreated sites. By the second growing season after aeration, density of honey mesquite was greater on aerated sites, whereas Texas pricklypear had declined on aerated sites. Density of spiny hackberry (Celtis pallida Torr.) and Texas persimmon (Diospyros texana Scheele) was greater on aerated sites during the first growing-season post treatment. Cover and stem density of hog-plum (Colubrina texana T. & G.), coma (Bumelia celastrina Kunth), and whitebrush [Aloysia gratissima (Gill. & Hook.

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Mineral Content of Guajillo Regrowth following Roller Chopping

Cited by 13 publications

References 5 publications

Shrubland resilience varies across soil types: implications for operationalizing resilience in ecological restoration

Shrubland resilience varies across soil types: implications for operationalizing resilience in ecological restoration

The architecture of shrubs after defoliation and the subsequent feeding behavior of browsers

Vegetation response of a mesquite-mixed brush community to aeration

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