The Experts below are selected from a list of 1344 Experts worldwide ranked by ideXlab platform

Just Cebrian - One of the best experts on this subject based on the ideXlab platform.

  • does Bird removal affect grasshopper grazing on juncus roemerianus black needlerush marshes
    Wetlands Ecology and Management, 2015
    Co-Authors: Eric L Sparks, Just Cebrian
    Abstract:

    Grazing on J. roemerianus (black needlerush), grasshopper abundance, and black needlerush plants was examined in the presence and exclusion of marsh Birds. Birds were excluded using a PVC framed exclosure wrapped with Bird Netting that allowed free passage of marsh grasshoppers. These measurements were taken bi-monthly from April to August 2011 in a black needlerush marsh within the Grand Bay National Estuarine Research Reserve (Moss Point, MS, USA). Grazing metrics, grasshopper abundance, and plant health metrics showed no effect of Bird exclusions across all sampling dates. In contrast to other marsh systems with strong trophic cascades (e.g., Spartina alterniflora on US east coast), these results suggest that the primary consumer (grasshoppers) is not affected by the presence of their dominant predator (Birds) which leads to no change in the health of the primary producer (black needlerush). Information derived from this study furthers our understanding of the trophic relationships within black needlerush marshes in the northern Gulf of Mexico.

  • does Bird removal affect grasshopper grazing on juncus roemerianus black needlerush marshes
    Wetlands Ecology and Management, 2015
    Co-Authors: Eric L Sparks, Just Cebrian
    Abstract:

    Grazing on J. roemerianus (black needlerush), grasshopper abundance, and black needlerush plants was examined in the presence and exclusion of marsh Birds. Birds were excluded using a PVC framed exclosure wrapped with Bird Netting that allowed free passage of marsh grasshoppers. These measurements were taken bi-monthly from April to August 2011 in a black needlerush marsh within the Grand Bay National Estuarine Research Reserve (Moss Point, MS, USA). Grazing metrics, grasshopper abundance, and plant health metrics showed no effect of Bird exclusions across all sampling dates. In contrast to other marsh systems with strong trophic cascades (e.g., Spartina alterniflora on US east coast), these results suggest that the primary consumer (grasshoppers) is not affected by the presence of their dominant predator (Birds) which leads to no change in the health of the primary producer (black needlerush). Information derived from this study furthers our understanding of the trophic relationships within black needlerush marshes in the northern Gulf of Mexico.

Eric L Sparks - One of the best experts on this subject based on the ideXlab platform.

  • does Bird removal affect grasshopper grazing on juncus roemerianus black needlerush marshes
    Wetlands Ecology and Management, 2015
    Co-Authors: Eric L Sparks, Just Cebrian
    Abstract:

    Grazing on J. roemerianus (black needlerush), grasshopper abundance, and black needlerush plants was examined in the presence and exclusion of marsh Birds. Birds were excluded using a PVC framed exclosure wrapped with Bird Netting that allowed free passage of marsh grasshoppers. These measurements were taken bi-monthly from April to August 2011 in a black needlerush marsh within the Grand Bay National Estuarine Research Reserve (Moss Point, MS, USA). Grazing metrics, grasshopper abundance, and plant health metrics showed no effect of Bird exclusions across all sampling dates. In contrast to other marsh systems with strong trophic cascades (e.g., Spartina alterniflora on US east coast), these results suggest that the primary consumer (grasshoppers) is not affected by the presence of their dominant predator (Birds) which leads to no change in the health of the primary producer (black needlerush). Information derived from this study furthers our understanding of the trophic relationships within black needlerush marshes in the northern Gulf of Mexico.

  • does Bird removal affect grasshopper grazing on juncus roemerianus black needlerush marshes
    Wetlands Ecology and Management, 2015
    Co-Authors: Eric L Sparks, Just Cebrian
    Abstract:

    Grazing on J. roemerianus (black needlerush), grasshopper abundance, and black needlerush plants was examined in the presence and exclusion of marsh Birds. Birds were excluded using a PVC framed exclosure wrapped with Bird Netting that allowed free passage of marsh grasshoppers. These measurements were taken bi-monthly from April to August 2011 in a black needlerush marsh within the Grand Bay National Estuarine Research Reserve (Moss Point, MS, USA). Grazing metrics, grasshopper abundance, and plant health metrics showed no effect of Bird exclusions across all sampling dates. In contrast to other marsh systems with strong trophic cascades (e.g., Spartina alterniflora on US east coast), these results suggest that the primary consumer (grasshoppers) is not affected by the presence of their dominant predator (Birds) which leads to no change in the health of the primary producer (black needlerush). Information derived from this study furthers our understanding of the trophic relationships within black needlerush marshes in the northern Gulf of Mexico.

Werner, Scott J. - One of the best experts on this subject based on the ideXlab platform.

  • First report of horned lark damage to canola seedings
    Pullman Washington : Washington State University. Extension., 2016
    Co-Authors: Schillinger, William F., Werner, Scott J.
    Abstract:

    Winter canola is considered the most promising domestically produced oilseed feedstock for the biodiesel industry and for diversifying wheat-based cropping systems in the Inland Pacific Northwest. Winter canola field experiments conducted in east-central Washington were completely destroyed and commercial fields were damaged over several years by large flocks of horned larks that ate the cotyledon leaves of preemerged and newly emerged seedlings. Numerous control strategies were attempted in field experiments, including laying Bird Netting over the entire experiment, placing a lifesize predator decoy in a field experiment, blasting a loud propane-powered cannon, and mixing garlic with canola seed before planting followed by spraying garlic water on the soil surface. None of the attempted control methods were successful. This is the first report of horned lark damage to preemerged and newly emerged canola seedlings. We discuss questions relevant to our unique encounter and non-lethal chemical repellents for the protection of canola crops associated with horned lark depredation

  • Horned lark damage to pre-emerged canola seedlings
    DigitalCommons@University of Nebraska - Lincoln, 2016
    Co-Authors: Schillinger, William F., Werner, Scott J.
    Abstract:

    Winter canola (Brassica napus L.) is considered the most promising domestically-produced oilseed feed-stock for biodiesel production and for diversifying wheat (Triticum aestivum L.)-based cropping systems in the Inland Pacific Northwest, USA. Winter canola field experiments conducted in east-central Washington were completely destroyed, and commercial fields were damaged or destroyed, over several years by large flocks of horned larks (Eremophilia alperestis L.) that ate the cotyledon leaves of pre-emerged and newly-emerged seedlings. Numerous control methods were attempted in field experiments, including laying Bird Netting over the entire experiment, placement of a life-size predator decoy in a field experiment, loud propane-powered cannon blasts, and mixing garlic with canola seed before planting followed by spraying garlic water on the soil surface. None of the attempted control methods were successful. This is the first report in the literature of horned lark damage to pre-emerged and newly-emerged canola seedlings. We discuss questions relevant to our novel account as well as potential abatement using falcons and non-toxic chemical repellents for the protection of industrial canola crops associated with horned lark depredation

Schillinger, William F. - One of the best experts on this subject based on the ideXlab platform.

  • First report of horned lark damage to canola seedings
    Pullman Washington : Washington State University. Extension., 2016
    Co-Authors: Schillinger, William F., Werner, Scott J.
    Abstract:

    Winter canola is considered the most promising domestically produced oilseed feedstock for the biodiesel industry and for diversifying wheat-based cropping systems in the Inland Pacific Northwest. Winter canola field experiments conducted in east-central Washington were completely destroyed and commercial fields were damaged over several years by large flocks of horned larks that ate the cotyledon leaves of preemerged and newly emerged seedlings. Numerous control strategies were attempted in field experiments, including laying Bird Netting over the entire experiment, placing a lifesize predator decoy in a field experiment, blasting a loud propane-powered cannon, and mixing garlic with canola seed before planting followed by spraying garlic water on the soil surface. None of the attempted control methods were successful. This is the first report of horned lark damage to preemerged and newly emerged canola seedlings. We discuss questions relevant to our unique encounter and non-lethal chemical repellents for the protection of canola crops associated with horned lark depredation

  • Horned lark damage to pre-emerged canola seedlings
    DigitalCommons@University of Nebraska - Lincoln, 2016
    Co-Authors: Schillinger, William F., Werner, Scott J.
    Abstract:

    Winter canola (Brassica napus L.) is considered the most promising domestically-produced oilseed feed-stock for biodiesel production and for diversifying wheat (Triticum aestivum L.)-based cropping systems in the Inland Pacific Northwest, USA. Winter canola field experiments conducted in east-central Washington were completely destroyed, and commercial fields were damaged or destroyed, over several years by large flocks of horned larks (Eremophilia alperestis L.) that ate the cotyledon leaves of pre-emerged and newly-emerged seedlings. Numerous control methods were attempted in field experiments, including laying Bird Netting over the entire experiment, placement of a life-size predator decoy in a field experiment, loud propane-powered cannon blasts, and mixing garlic with canola seed before planting followed by spraying garlic water on the soil surface. None of the attempted control methods were successful. This is the first report in the literature of horned lark damage to pre-emerged and newly-emerged canola seedlings. We discuss questions relevant to our novel account as well as potential abatement using falcons and non-toxic chemical repellents for the protection of industrial canola crops associated with horned lark depredation

Ct Downs - One of the best experts on this subject based on the ideXlab platform.

  • The potential for Birds to disperse the seeds of Acacia cyclops, an invasive alien plant in South Africa
    Wiley, 2015
    Co-Authors: Tm Mokotjomela, Jh Hoffmann, Ct Downs
    Abstract:

    Rooikrans Acacia cyclops is an aggressive invasive tree that threatens natural resources in South Africa. The seeds of A. cyclops have a prominent aril which attracts Birds that ingest the seeds and disperse them endozoochorously. Two biological control agents, a Seed Weevil Melanterius servulus and a Flower‐galling Midge Dasineura dielsi, were released on A. cyclops in 1991 and 2002, respectively. Together these agents have substantially reduced seed production and generally far lower numbers of seeds are now available to Birds. A consequence of this transition from historically bounteous quantities of seeds to scanty seed availability is that Birds may no longer associate with the trees and seed dispersal may be disproportionately reduced. To assess whether this has happened, seed attrition was measured by comparing the amount of seeds that disappeared from two groups of branches, one available to Birds and the other enclosed in Bird Netting. Other types of granivores (mainly field mice) were excluded from both groups of branches with a plastic funnel placed around the stems. Mature seeds were also harvested and fed to caged Bird species to determine gut retention times and germination rates of ingested seeds. Attrition rates of seeds showed that Birds continue to remove seeds but that only a proportion of the crop is taken. Only two frugivorous species (Knysna Turaco Tauraco corythaix and Red‐winged Starling Onychognathus morio) and two granivorous species (Red‐eyed Dove Streptopelia semitorquata and Laughing Dove Streptopelia sengalensis) ingested A. cyclops seeds during feeding trials. Ingestion by Birds enhanced seed germination except for those ingested by Laughing Doves. There were no apparent effects of length of gut passage time and avian body size on seed germination rates. Despite the diminished seed resource due to biological control agents, Birds continue to disperse A. cyclops seeds.National Research Foundation (South Africa