Competition from Bromus tectorum removes differences between perennial grasses in N capture and conservation strategies

Walker, Jeffrey T.; James, Jeremy J.; Drenovsky, Rebecca E.

doi:10.1007/s11104-016-3053-4

Cited by 9 publications

(3 citation statements)

References 63 publications

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“…Meanwhile, it has reported that increasing nutrient supply modulated the dominant plant defensive tactics from tolerance to induced resistance (Burghardt, 2016). For example,Bromus tectorum invasion was controlled by regulating the nutrient ratio in California (Walker et al, 2017), but in the wetlands, carbon addition combined with repeated biomass harvesting was used to reduce invasion by Phalaris arundinacea (Perry et al, 2004). The root hemiparasitic characteristics shown by P. kansuensis means that it mainly obtains water and other inorganic materials from its host, which is why sites with high SOC were used in this study.…”

Section: Nutrient Effects On Invasion By P Kansuensismentioning

confidence: 99%

Effects of soil factors on Pedicularis kansuensis invasion in alpine grassland

Liu

Fang

et al. 2023

Preprint

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Root hemiparasitic Pedicularis kansuensis is an invasive native species in China and has been expanding in the Bayanbulak Grassland of Xinjiang Uygur Autonomous Region over the past decade, threatening the local livestock industry. To understand why this damaging species expands in some areas but not in others, we compared soil water content, soil nutrient status, and plant community structures between heavily infected and non-infected sites. We hypothesized that soil nutrient levels and plant species composition would be more beneficial to the spatial expansion of P. kansuensis in heavily infected areas than in non-infected ones. Quadrat (1 m × 1 m) surveys were carried out in the Bayanbulak Grassland. Species number, percent vegetation cover, aboveground plant biomass, plant height, and relative frequency were recorded. Three topsoil samples were taken at 0–10 cm depth from each quadrat and their nutrient statuses were determined. The results showed that (1) P. kansuensis invasion reduces the species richness of the community compared to the uninvaded area (3.07%), but increases the canopy cover overall (16.99%); (2) soil water content (SW) and soil nutrient content are the main factors that determine invasion by P. kansuensis, and SW plays the more important role; (3) SW controls P. kansuensis leaf stoichiometry, decreases the Ratio of leaf nitrogen (LN) to leaf phosphorus (LP), and affects LP (P < 0.005). Finally, after combining the results, we found that the soil factor accounted for 46.50% and plants accounted for 22.50% of P. kansuensis invasions in the Bayanbulak Grassland.

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Section: Nutrient Effects On Invasion By P Kansuensismentioning

confidence: 99%

Effects of soil factors on Pedicularis kansuensis invasion in alpine grassland

Liu

Fang

et al. 2023

Preprint

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“…This, coupled with opportunistic uptake of mineral nitrogen (i.e., NO 3 − –N and NH 4 + –N) during episodic high-temperature periods (>15 °C), may account for downy brome’s high nutrient-acquisition plasticity and invasiveness relative to native perennials like BBWG [ 36 , 93 ]. Walker et al [ 94 ] suggested that an acquisitive strategy for nutrients may be beneficial for seedling growth, yet a nutrient conservation strategy may be paramount for longevity.…”

Section: Bluebunch Wheatgrass: Plant Traitsmentioning

confidence: 99%

Using Genomic Selection to Develop Performance-Based Restoration Plant Materials

Jones

Monaco

Larson

et al. 2022

IJMS

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Effective native plant materials are critical to restoring the structure and function of extensively modified ecosystems, such as the sagebrush steppe of North America’s Intermountain West. The reestablishment of native bunchgrasses, e.g., bluebunch wheatgrass (Pseudoroegneria spicata [Pursh] À. Löve), is the first step for recovery from invasive species and frequent wildfire and towards greater ecosystem resiliency. Effective native plant material exhibits functional traits that confer ecological fitness, phenotypic plasticity that enables adaptation to the local environment, and genetic variation that facilitates rapid evolution to local conditions, i.e., local adaptation. Here we illustrate a multi-disciplinary approach based on genomic selection to develop plant materials that address environmental issues that constrain local populations in altered ecosystems. Based on DNA sequence, genomic selection allows rapid screening of large numbers of seedlings, even for traits expressed only in more mature plants. Plants are genotyped and phenotyped in a training population to develop a genome model for the desired phenotype. Populations with modified phenotypes can be used to identify plant syndromes and test basic hypotheses regarding relationships of traits to adaptation and to one another. The effectiveness of genomic selection in crop and livestock breeding suggests this approach has tremendous potential for improving restoration outcomes for species such as bluebunch wheatgrass.

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“…N deposition can increase plant biomass and decrease the root-to-shoot ratio within a certain supply range [10]. An increase in N availability may facilitate the successful invasion of exotic plants into new plant communities [11]. N deposition alters CO 2 emission through an increase in plant biomass, a decrease in the C/N ratio of litter, and the mitigation of N restriction on microbial metabolism [12].…”

Section: Introductionmentioning

confidence: 99%

Effects of N Addition Frequency and Quantity on Hydrocotyle vulgaris Growth and Greenhouse Gas Emissions from Wetland Microcosms

Zhang

Gao

et al. 2019

Sustainability

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(1) Background: Increased attention has been paid to atmospheric nitrogen (N) deposition caused by human activities. N deposition quantity has seriously affected plant productivity and greenhouse gas emissions in wetlands, but the effects of N deposition frequency remain unclear. (2) Methods: We assembled microcosms, which contained vegetative individuals (ramets) of Hydrocotyle vulgaris and soil and subjected them to three frequencies (N addition 1, 2, and 14 times during the experimental period) crossed with three quantities (5, 15, and 30 g N m−2 yr−1) for 90 days. (3) Results: The quantity of N addition significantly increased the root, stem biomass, and ramets number of H. vulgaris, but decreased the spike biomass. N addition quantity significantly promoted N2O emission and inhibited CH4 emission but had no significant effect on CO2 emission. The increasing frequency of N addition significantly promoted the root-to-shoot ratio and decreased N2O emission under high N addition quantity. (4) Conclusions: In conclusion, N addition alters the reproductive strategy of H. vulgaris and enhances its invasiveness, promoting N2O emission but not the CO2 equivalent of the H. vulgaris-soil system.

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Competition from Bromus tectorum removes differences between perennial grasses in N capture and conservation strategies

Cited by 9 publications

References 63 publications

Effects of soil factors on Pedicularis kansuensis invasion in alpine grassland

Effects of soil factors on Pedicularis kansuensis invasion in alpine grassland

Using Genomic Selection to Develop Performance-Based Restoration Plant Materials

Effects of N Addition Frequency and Quantity on Hydrocotyle vulgaris Growth and Greenhouse Gas Emissions from Wetland Microcosms

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