The timing of leaf damage affects future herbivory in mountain sagebrush (<i>Artemisia tridentata</i>)

McMunn, Marshall

doi:10.1002/ecy.1925

Cited by 9 publications

(7 citation statements)

References 33 publications

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“…Third, the period during which an animal is physically active will determine when it primarily exerts its influence on ecosystems [e.g., predator-prey relationships ( 21 ), herbivory ( 22 ), and post-dispersal seed predation ( 23 )]. This means that the loss of species from one diel niche may result in the loss or diminishment of the ecosystem functions they provide if species from other diel niches are unable to replace their functions or are unable to do these functions as effectively (i.e., there is limited functional redundancy across diel niches).…”

Section: Introductionmentioning

confidence: 99%

Global and regional erosion of mammalian functional diversity across the diel cycle

2022

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Biodiversity is declining worldwide. When species are physically active (i.e., their diel niche) may influence their risk of becoming functionally extinct. It may also affect how species losses affect ecosystems. For 5033 terrestrial mammals, we predict future changes to diel global and local functional diversity through a gradient of progressive functional extinction scenarios of threatened species. Across scenarios, diurnal species were at greater risk of becoming functionally extinct than nocturnal, crepuscular, and cathemeral species, resulting in deep functional losses in global diurnal trait space. Redundancy (species with similar roles) will buffer global nocturnal functional diversity; however, across the land surface, losses will mostly occur among functionally dispersed species (species with distinct roles). Functional extinctions will constrict boundaries of cathemeral trait space as megaherbivores, and arboreal foragers are lost. Variation in the erosion of functional diversity across the daily cycle will likely profoundly affect the partitioning of ecosystem functioning between night and day.

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Section: Introductionmentioning

confidence: 99%

Global and regional erosion of mammalian functional diversity across the diel cycle

2022

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“…Although A. tridentata accumulates many secondary metabolites to deter herbivores, the damage caused by herbivory can be extensive [ 35 , 36 ]. However, adult A. tridentata plants can usually tolerate this damage [ 35 , 37 , 38 ].…”

Section: Introductionmentioning

confidence: 99%

Herbivory Amplifies Adverse Effects of Drought on Seedling Recruitment in a Keystone Species of Western North American Rangelands

Geisler

Buerki

Serpe

2022

Plants

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Biotic interactions can affect a plant’s ability to withstand drought. Such an effect may impact the restoration of the imperiled western North American sagebrush steppe, where seedlings are exposed to summer drought. This study investigated the impact of herbivory on seedlings’ drought tolerance for a keystone species in this steppe, the shrub Artemisia tridentata. Herbivory effects were investigated in two field experiments where seedlings were without tree protectors or within plastic or metal-mesh tree protectors. Treatment effects were statistically evaluated on herbivory, survival, leaf water potential, and inflorescence development. Herbivory occurrence was 80% higher in seedlings without protectors. This damage occurred in early spring and was likely caused by ground squirrels. Most plants recovered, but herbivory was associated with higher mortality during the summer when seedlings experienced water potentials between −2.5 and −7 MPa. However, there were no differences in water potential between treatments, suggesting that the browsed plants were less tolerant of the low water potentials experienced. Twenty months after outplanting, the survival of plants without protectors was 40 to 60% lower than those with protectors. The percentage of live plants developing inflorescences was approximately threefold higher in plants with protectors. Overall, spring herbivory amplified susceptibility to drought and delayed reproductive development.

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“…Under the KSH, information exchange is improved or even exclusive to related individuals through the private channels of communication where informative signals have a genetic basis; consequently, emitters benefit by increasing their inclusive fitness [24]. Decades of experimental work with sagebrush (Artemisia tridentata) have shown it to be a model system for studying volatile-mediated induced resistance [8,[25][26][27][28] and have important implications for plant fitness [15]. Recent field studies of sagebrush found that plants were able to distinguish volatile cues from itself or closely related individuals, a form of kin recognition [21].…”

Section: Introductionmentioning

confidence: 99%

Risk of herbivory negatively correlates with the diversity of volatile emissions involved in plant communication

et al. 2021

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Plant-to-plant volatile-mediated communication and subsequent induced resistance to insect herbivores is common. Less clear is the adaptive significance of these interactions; what selective mechanisms favour plant communication and what conditions allow individuals to benefit by both emitting and responding to cues? We explored the predictions of two non-exclusive hypotheses to explain why plants might emit cues, the kin selection hypothesis (KSH) and the mutual benefit hypothesis (MBH). We examined 15 populations of sagebrush that experience a range of naturally occurring herbivory along a 300 km latitudinal transect. As predicted by the KSH, we found several uncommon chemotypes with some chemotypes occurring only within a single population. Consistent with the MBH, chemotypic diversity was negatively correlated with herbivore pressure; sites with higher levels of herbivory were associated with a few common cues broadly recognized by most individuals. These cues varied among different populations. Our results are similar to those reported for anti-predator signalling in vertebrates.

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The timing of leaf damage affects future herbivory in mountain sagebrush (Artemisia tridentata)

Cited by 9 publications

References 33 publications

Global and regional erosion of mammalian functional diversity across the diel cycle

Global and regional erosion of mammalian functional diversity across the diel cycle

Herbivory Amplifies Adverse Effects of Drought on Seedling Recruitment in a Keystone Species of Western North American Rangelands

Risk of herbivory negatively correlates with the diversity of volatile emissions involved in plant communication

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