Russian olive habitat along an arid river supports fewer bird species, functional groups and a different species composition relative to mixed vegetation habitats

Mahoney, Sean M.; Smith, Anna Nellis B.; Motyka, Peter J.; Lundgren, Erick J.; Winton, Raemy R.; Stevens, Bo; Johnson, Matthew

doi:10.1016/j.jaridenv.2019.04.018

Cited by 7 publications

(3 citation statements)

References 29 publications

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“…It may also increase the availability of soil nitrogen resources and microbial diversity in the rhizosphere (Yildiz et al 2017). Moreover, ecological studies conducted on this woody species have generally dealt with revegetation (Espeland et al 2017), afforestation restoration (Yildiz et al 2017), potential distribution and limiting climatic factors (Zhang et al 2018), and its status as a bird habitat (Mahoney et al 2019). However, no studies to date have been conducted on ROS formation, ROS detoxification, or enzymes and antioxidant capacity under the combined effects of biostimulants such as AMF and humic substances in Russian olive (Elaeagnus angustifolia L).…”

Section: Introductionmentioning

confidence: 99%

Arbuscular Mycorrhizal Fungi and K-Humate Combined as Biostimulants: Changes in Antioxidant Defense System and Radical Scavenging Capacity in Elaeagnus angustifolia

Torun

Toprak

2020

J Soil Sci Plant Nutr

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Arbuscular mycorrhizal fungi (AMF) and potassium humate (KH) are separately known as significant biostimulants, but their combined effect on plants remains elusive. This study investigated the single and combined roles of AMF and KH on the antioxidant defense system in Russian olive (Elaeagnus angustifolia L.) leaves. Soil below the seeds was inoculated with indigenous AMF spores (Funneliformis, Claroideoglomus; 500 spores per seed). The KH (1.5 g/ per 1 kg of seed) was applied during sowing. Growth, leaf-water ratio, chlorophyll fluorescence, lipid peroxidation, H 2 O 2 content, antioxidant enzymes, and antioxidant capacity were analyzed in treated and untreated plants. Combined AMF and KH applications had a greater recovery effect on vegetative organ growth than separate treatments. With combined treatment, plants maintained leaf water status and chlorophyll fluorescence, while peroxidation of lipid membranes and H 2 O 2 content was reduced. Moreover, increases in superoxide dismutase and glutathione reductase activity prevented cellular damage from reactive oxygen species. Total phenolic content and antioxidant capacity values were remarkably higher in plants grown under the combined treatment. As a result, compared with their separate applications, a combination of AMF and KH enhanced the antioxidant defense system by increasing antioxidant enzymes and antioxidant capacity and, thus, could be used to enhance plant growth.

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Section: Introductionmentioning

confidence: 99%

Arbuscular Mycorrhizal Fungi and K-Humate Combined as Biostimulants: Changes in Antioxidant Defense System and Radical Scavenging Capacity in Elaeagnus angustifolia

Torun

Toprak

2020

J Soil Sci Plant Nutr

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“…Invasive species can act synergistically to increase the rate and success of additional species introductions (Simberloff, 2006; Simberloff & Von Holle, 1999). For example, monocultures of invasive riparian trees can have particularly acute effects on both habitat and nonnative species introductions in riverine ecosystems (Heinrich et al, 2021; Katz & Shafroth, 2003; Mahoney et al, 2019; Mineau et al, 2012). Specifically, riparian invasion can alter sediment transport and retention, causing changes in channel morphology (West et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Diets of invasive channel catfish are subsidized by invasive riparian trees

Cheek,

Peoples,

Goforth

2023

Ecology of Freshwater Fish

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Russian olive (Elaeagnus angustifolia) is an invasive, fruit‐bearing riparian tree that dominates riparian zones of the San Juan River in the southwestern United States. Previous research in this river suggests olive fruit is common in diets of invasive channel catfish (Ictalurus punctatus), but its energetic importance is unknown (i.e. critical for catfish fitness vs. incidental consumption). We assessed Russian olive consumption in channel catfish diets bimonthly for 1 year, hypothesizing that olive consumption would be greatest during periods of high olive availability and low benthic aquatic invertebrate availability. We found that catfish consumed olive fruit throughout the year and that olive comprised up to 44% of total stomach contents by mass, with peaks in spring and fall. Regression models revealed the presence and mass of olive fruit in catfish stomachs were positively associated with catfish total length, with a significant interaction between water temperature and river discharge. Catfish were more likely to consume olive fruit during higher flows, regardless of temperature and at low discharge with higher temperature. Contrary to our hypothesis, neither olive nor benthic invertebrate availability were associated with olive presence in channel catfish diets. Nutrition analysis indicated that olive alone was a low‐quality diet item but has the potential to provide a reliable energy source. We used seasonal data to estimate the energetic contribution of olive fruit to catfish populations using a bioenergetic model, which estimated that olive fruit accounted for 35.6% of energy (Joules) consumed by catfish populations and satisfied 38% of their metabolic demand. Our results suggest that Russian olive fruit is a significant subsidy to channel catfish in the San Juan River. However, more research is needed to determine the indirect effects of this interaction on native fishes and ecosystem function.

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“…As Russian olive became a dominant plant, especially within riparian areas, many researchers began to document wildlife concerns associated with its spread. The majority of these studies focused on birds and found that within Russian olive stands, cavity nesting birds decreased (Fischer et al 2012) and generally fewer bird species were found compared to native or mixed non‐native stands (Mahoney et al 2019). Others have documented numerous birds using the berries as a food source and the branches as preferred nesting sites (Leatherman 2011).…”

mentioning

confidence: 99%

Coyote and porcupine spread Russian olive seeds through endozoochory

Campbell

West

2022

J Wildl Manag

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Russian olive (Elaeagnus angustifolia) is an invasive tree that has spread throughout much of the western United States. The mode of seed dispersal occurs by hydrochory and possibly by birds. Seed dispersal by frugivorous mammals has not been investigated.Between 15 October and 4 November 2020, we walked through Russian olive windbreaks in western North Dakota, USA, and surveyed for mammal scat, and found 10 coyote (Canis latrans) and 54 porcupine (Erethizon dorsatum) scats that contained intact Russian olive seeds. We subsequently evaluated the viability, germination frequency, and time to germination of seeds ingested by coyote and porcupine relative to un-ingested control seeds harvested from trees at sites where we collected scat. Overall, Russian olive seeds that passed through mammal intestinal tracts had similar viability and equivalent (porcupine) or higher (coyote) germination frequency compared to controls. Additionally, coyoteingested seeds germinated earlier (time to germination was low) than controls, but porcupine-ingested seeds were similar to controls. Thus, our data supports the idea that mammals may be agents of regional Russian olive seed dispersal.

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Russian olive habitat along an arid river supports fewer bird species, functional groups and a different species composition relative to mixed vegetation habitats

Cited by 7 publications

References 29 publications

Arbuscular Mycorrhizal Fungi and K-Humate Combined as Biostimulants: Changes in Antioxidant Defense System and Radical Scavenging Capacity in Elaeagnus angustifolia

Arbuscular Mycorrhizal Fungi and K-Humate Combined as Biostimulants: Changes in Antioxidant Defense System and Radical Scavenging Capacity in Elaeagnus angustifolia

Diets of invasive channel catfish are subsidized by invasive riparian trees

Coyote and porcupine spread Russian olive seeds through endozoochory

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