Actinorhizal species influence plant and soil nitrogen status of semiarid shrub-dominated ecosystems in the western Great Basin, USA

Freund, Stephanie M.; Soper, Fiona M.; Poulson, Simon R.; Selmants, Paul C.; Sullivan, Benjamin W.

doi:10.1016/j.jaridenv.2018.06.004

Cited by 6 publications

(2 citation statements)

References 44 publications

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“…Conforming this, other researcher concluded that soil N content was affected principally by plant species and that successful long-term restoration improved the NF potential [7]. Another study in the western Great Basin, USA, also indicated that the non-fixing shrubs consistently had lower mean N values than the same reference shrub species [32]. These species due to their capacity to fix N are essential components in natural and managed terrestrial ecosystems [13].…”

Section: Discussionmentioning

confidence: 92%

Nitrogen-fixing potential of Halimodendron halodendron (Pall.) Voss in arid and semi-arid areas of Iran

2020

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Nitrogen content was estimated in rhizosphere of legume Halimodendron halodendron (Pall.) Voss along with Berberis integerrima Bunge as control in sandy loam soils of arid and semi-arid areas in Middle East every 2 years (2013-2019). Lepidium sativum seed was also cultivated in soil of shrubs rhizosphere for monitoring its performance and N content. Maximum rates of 1.05% year −1 and 1.54% year −1 for soil organic nitrogen (ON) and 0.50% year −1 and 0.66% year −1 for mineral nitrogen (MN) were observed in H. halodendron rhizospheres in arid and semi-arid areas, respectively. Moreover, the highest L. sativum performance occurred in H. halodendron rhizosphere. Significant relation also was observed between N content of L. sativum and N content of shrubs rhizosphere (p < 0.02; R 2 = 0.606 and 0.585 between SON and MN of soil, respectively, and L. sativum N content).

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Section: Discussionmentioning

confidence: 92%

Nitrogen-fixing potential of Halimodendron halodendron (Pall.) Voss in arid and semi-arid areas of Iran

2020

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“…Reported N-fixation rates for S. canadensis and C. velutinus vary widely, likely the result of differing shrub densities, community dynamics, measuring techniques, and other variables [106][107][108][109]. Nonetheless, recent studies have demonstrated that where productivity is limited by N availability, non-N-fixing plants respond positively to increased soil N generated by N-fixing plants [110,111], although changes to soil biota [111], increased soil organic matter levels [110], subsequent slow release of chemically bound organic N [112], and service as nurse plants for other species' establishment and growth [97,113] may also be important.…”

Section: Shrub Regenerationmentioning

confidence: 99%

Vegetative and Edaphic Responses in a Northern Mixed Conifer Forest Three Decades after Harvest and Fire: Implications for Managing Regeneration and Carbon and Nitrogen Pools

Dumroese

Jürgensen

Page‐Dumroese

2020

Forests

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Research Highlights: This experiment compares a range of combinations of harvest, prescribed fire, and wildfire. Leveraging a 30-year-old forest management-driven experiment, we explored the recovery of woody species composition, regeneration of the charismatic forest tree species Larix occidentalis Nutt., and vegetation and soil carbon (C) and nitrogen (N) pools. Background and Objectives: Initiated in 1967, this experiment intended to explore combinations of habitat type phases and prescribed fire severity toward supporting regeneration of L. occidentalis. At onset of the experiment, a wildfire affected a portion of the 60 research plots, allowing for additional study. Our objective was to better understand silvicultural practices to support L. occidentalis regeneration and to better understand the subsequent impacts of silvicultural practices on C and N pools within the vegetation and soil. Materials and Methods: We categorized disturbance severity based on loss of forest floor depth; 11 categories were defined, including controls for the two habitat type phases involved. We collected abundance, biomass, and C and N concentrations for the herbaceous layer, shrubs, and trees using nested quadrats and 6 to 10 experimental units per disturbance category plot. Moreover, we systematically sampled woody residue from transects, and forest floor, soil wood, and mineral soil with a systematic grid of 16 soil cores per disturbance category plot. Results: We found that (1) disturbance severity affected shrub species richness, diversity, and evenness within habitat type phases; (2) L. occidentalis regenerates when fire is part of the disturbance; (3) N-fixing shrub species were more diverse in the hotter, drier plots; (4) recovery levels of C and N pools within the soil had surpassed or were closer to pre-disturbance levels than pools within the vegetation. Conclusions: We confirm that L. occidentalis regeneration and a diverse suite of understory shrub species can be supported by harvest and prescribed fire, particularly in southern and western aspects. We also conclude that these methods can regenerate L. occidentalis in cooler, moister sites, which may be important as this species’ climate niche shifts with climate change.

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Effects of an actinorhizal shrub on the nitrogen status of the soil and neighboring plants in an alpine meadow of the Tibetan Plateau

Sai

Guo

et al. 2022

Alp Botany

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Actinorhizal species influence plant and soil nitrogen status of semiarid shrub-dominated ecosystems in the western Great Basin, USA

Cited by 6 publications

References 44 publications

Nitrogen-fixing potential of Halimodendron halodendron (Pall.) Voss in arid and semi-arid areas of Iran

Nitrogen-fixing potential of Halimodendron halodendron (Pall.) Voss in arid and semi-arid areas of Iran

Vegetative and Edaphic Responses in a Northern Mixed Conifer Forest Three Decades after Harvest and Fire: Implications for Managing Regeneration and Carbon and Nitrogen Pools

Effects of an actinorhizal shrub on the nitrogen status of the soil and neighboring plants in an alpine meadow of the Tibetan Plateau

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