Crude Terpenoid Influence on Mule Deer Preference for Sagebrush

Personius, Timothy Lee; Wambolt, Carl L.; Stephens, Jeffrey R.; Kelsey, Rick G.

doi:10.2307/3899368

Cited by 64 publications

(48 citation statements)

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“…Unfortunately, our lack of detailed knowledge about the nature of the volatile cue and the processes of emission, movement, and recognition of the cue hinder our ability to construct a credible explanation at this time for the strong eVect of ontogeny on communication that we observed in this study. Volatile organic compounds released by sagebrush (A. tridentata) have been analyzed and at least 23 compounds have been identiWed including monoterpenes, sesquiterpene lactones, coumarins, and Xavonoids (Kelsey et al 1978;Personius et al 1987;Preston et al 2001). Once the actual nature of the volatile cue is characterized, we will be much better able to understand how biological and physical properties inXuence the communication process.…”

Section: Discussionmentioning

confidence: 99%

Plant age, communication, and resistance to herbivores: young sagebrush plants are better emitters and receivers

Shiojiri

Karban

2006

Oecologia

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Plants progress through a series of distinct stages during development, although the role of plant ontogeny in their defenses against herbivores is poorly understood. Recent work indicates that many plants activate systemic induced resistance after herbivore attack, although the relationship between resistance and ontogeny has not been a focus of this work. In addition, for sagebrush and a few other species, individuals near neighbors that experience simulated herbivory become more resistant to subsequent attack. Volatile, airborne cues are required for both systemic induced resistance among branches and for communication among individuals. We conducted experiments in stands of sagebrush of mixed ages to determine effects of plant age on volatile signaling between branches and individuals. Young and old control plants did not differ in levels of chewing damage that they experienced. Systemic induced resistance among branches was only observed for young plants. Young plants showed strong evidence of systemic resistance only if airflow was permitted among branches; plants with only vascular connections showed no systemic resistance. We also found evidence for volatile communication between individuals. For airborne communication, young plants were more effective emitters of cues as well as more responsive receivers of volatile cues.

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Section: Discussionmentioning

confidence: 99%

Plant age, communication, and resistance to herbivores: young sagebrush plants are better emitters and receivers

Shiojiri

Karban

2006

Oecologia

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“…Some species (as well as subspecies and ecotypes) of sagebrush are more palatable to than others to sheep and mule deer, evidently because of differences in concentrations of terpenes (Welch et al 1983, Personius et al 1987. Neither exposure early in life, nor supplemental energy or protein caused a greater intake of sagebrush by lambs.…”

Section: Discussionmentioning

confidence: 99%

Sagebrush ingestion by lambs: Effects of experience and macronutrients

Burritt¹,

Banner²,

Provenza³

2000

REM

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We investigated how experience early in life and macronutrient content of the diet influenced intake of mountain big sagebrush (Artemisia tridentata Nutt. ssp. v a s e y a n a (Rydb.) Beetle) by sheep. In the first part of our study, 2-month-old lambs were exposed as a group for 2 mo to a 70% barley-30% soybean meal ration (300 g/hd/day) that contained increasing amounts sagebrush (1 to 20%). Control lambs received grain without sagebrush. All lambs had access to alfalfa hay and pellets ad libitum. When lambs were tested at 6 months of age, prior exposure had no effect on sagebrush consumption after the first 4 days of the trial. When sagebrush comprised 20% of an alfalfa/barley ration, lambs ate the sagebrush ration readily even when a nutritious alternative was offered indicating the flavor of sagebrush did not prevent lambs from feeding. Increasing the amount of sagebrush in the ration from 50% to 75% resulted in lambs eating less of the barley/sagebrush ration, but daily intake of sagebrush remained constant throughout the 4 day trial, presumably because toxins (terpenes) limited intake of sagebrush. In the second part of our study, lambs experienced with sagebrush were fed 250 g/hd/day of barley, and nutritional status was varied by offering alfalfa pellets at 33% or 80% of ad libitum (1.2 and 2.7 times maintenance, respectively) to determine if dietary energy levels affected intake of sagebrush. Each day lambs received a 50/50 sagebrush/barley supplement ad libitum for 1 hour. Lambs fed at 33% of ad libitum consumed more of the sagebrush/barley supplement than lambs fed at 80% of ad libitum. Thus, additional energy did not enable lambs to consume more sagebrush. In the last trial, lambs in both treatments were fed a basal ration of alfalfa pellets at 50% of ad libitum. Each morning for 1 hour, lambs were offered macronutrient supplements containing either 50% barley/50% sagebrush (high energy) or 25% barley/25% soybean meal/50% sagebrush (high energy and protein). Lambs consumed the same amount of sagebrush regardless of supplement. Thus, supplemental protein did not improve sagebrush consumption. We conclude lambs readily ingested a high-energy ration containing sagebrush, regardless of exposure early in life, suggesting toxins, not flavor, control intake of sagebrush. Further, supplementing lambs with energy or protein failed to improve intake of sagebrush, which suggests these macronutrients did not enhance detoxification of sagebrush. We are grateful to J. Provenza and J. Villalba for assisting with clipping sagebrush and conducting feeding trials. This research was supported by grants from the Utah Agric. Exp. Sta. This paper is published with the approval of the Director, Utah Agric. Sta., Utah State University, Logan, Utah as Journal Paper 6052.Accepted 24 April 1998. ResumenInvestigamos como la experiencia adquirida a temprana edad y el contenido de micronutrientes de la dieta influye en le consumo de "Mountain big sagebrush" (Artemisa tridentata Nutt. v a y e s a n a (Rydb.) Beetle) por ov...

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“…El contenido de FT, TC y la astringencia se presentaron como variables positivamente relacionadas entre si. Estos resultados ponen de manifiesto que, tal como lo señalan Personious et al (1987), cuando el contenido de compuestos fenólicos no se ubica en niveles limitantes al consumo voluntario, otros factores químicos pueden jugar un rol fundamental en la selectividad del follaje de especies leñosas. En este sentido, García et al (2008) al evaluar en cabras la preferencia por el follaje de especies forrajeras leñosas con bajo contenido de compuestos fenó-licos, concluyen que sólo los metabolitos secundarios del grupo de los isoprenoides (esteroles, terpenos y saponinas) presentaron relación negativa con el consumo voluntario.…”

Section: Figura 1 Dinámica De La Biomasa Herbácea Y Los Fragmentos Eunclassified

Selección de especies leñosas por vacunos en silvopastoreo de un bosque semicaducifolio en Venezuela

et al. 2012

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RESUMENPara determinar la selección de plantas leño-sas por vacunos en silvopastoreo de un bosque semicaducifolio tropical (BSCT), se evaluaron fragmentos epidérmicos en muestras de heces de 14 vacunos machos Brahman x Holstein (390,4 ± 18,0 kg peso vivo). Los animales pastaron durante 91 días sobre 81 ha localizadas en el estado Portuguesa, Venezuela, donde 50 ha correspondieron a un BSCT y el resto a pastizales con predomino de Cynodon nlemfuensis, Sporobolus indicus, Cyperus sp. y Axonopus sp. Empleando la técnica de puntos en cuadrante sobre transectas, en el bosque se identificaron 22 especies de plantas leñosas, agrupadas en 11 familias botánicas con 40,9% de las especies dentro de la familia Fabaceae. La especie Guazuma ulmifolia tuvo la mayor dominancia relativa (60,4%), acumulando conjuntamente con Pithecellobium lanceolatum y Samanea saman el 81,1% de este parámetro. Estas mismas especies mostraron los mayores índices de valor de importancia (162,6; 24,8 y 26,5 respectivamente). Las Poaceae presentaron la mayor frecuencia relativa de aparición de fragmentos epidémicos en heces con el 49,6%, mientras el conjunto de plantas leñosas presentó un 46,2%, del cual las Fabaceae alcanzaron el 80,7%. Las especies más seleccionadas fueron Inga laurina, Machaerium humboldtianum, S. saman y Sida acuta, con un Índice de Ivlev medio de 0,60 ± 0,09. La composición química del follaje de las plantas leñosas sugiere un patrón de selección ajustado a la oferta de nutrientes de cada especie, resaltando el valor estratégico del BSCT en sistemas de silvopastoreo en ambientes tropicales. SUMMARYThe woody plant palatability for cattle in a silvopastoral system on a semi-deciduous tropical forest (SDTF) was evaluated. Epidermal fragments in fecal samples from 14 male cattle Brahman x Holstein (390.4 ± 18.0 kg live weight) grazing during 91 days in 81 ha located in Portuguesa state, Venezuela were evaluated. SDTF was present in 50 ha; the rest of grassland, was mainly composed by Cynodon nlemfuensis, Sporobolus indicus, Cyperus sp. and Axonopus sp. Using the point quarter method on transects, 22 woody plant species were identified they were grouped into 11 botanical families, with 40.9% of species belonging to the Fabaceae family. Guazuma ulmifolia had the greater relative dominancy (60.4%), and together with Pithecellobium lanceolatum and Samanea saman reached the 81.1%. These same species showed the higher importance value index (162.6, 24.8 and 26.5 respectively). Poaceae had the higher relative frequency (49.6%) for epidermal fragments in feces; total woody plants reached 46.2% (Fabaceae: 80.7%). The most selected species were Inga laurina, Machaerium humboldtianum, S. saman and Sida acuta, (Ivlev

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Crude Terpenoid Influence on Mule Deer Preference for Sagebrush

Cited by 64 publications

References 13 publications

Plant age, communication, and resistance to herbivores: young sagebrush plants are better emitters and receivers

Plant age, communication, and resistance to herbivores: young sagebrush plants are better emitters and receivers

Sagebrush ingestion by lambs: Effects of experience and macronutrients

Selección de especies leñosas por vacunos en silvopastoreo de un bosque semicaducifolio en Venezuela

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