scholarly journals Growth and flowering responses of eelgrass to simulated grazing and fecal addition by Brant Geese

Ecosphere ◽  
2021 ◽  
Vol 12 (8) ◽  
Author(s):  
Frank J. Shaughnessy ◽  
Susannah L. Ferson ◽  
Adam J. Frimodig ◽  
Daniel C. Barton ◽  
Mathew Hurst ◽  
...  
Keyword(s):  
Simulated Grazing

The response of pygmy bluetongue lizards to simulated grazing in the field during three drought years

2012 ◽  
Vol 39 (6) ◽  
pp. 540 ◽  
Author(s):  
Melissa Pettigrew ◽  
C. Michael Bull
Keyword(s):  
Prey Availability ◽  
Careful Consideration ◽  
Grazing Management ◽  
Control Treatment ◽  
Ground Vegetation ◽  
Control Group ◽  
Drought Period ◽  
Before And After ◽  
Simulated Grazing ◽  
Complex Relationships

Context Grazing by domestic stock can directly influence and shape the functions of an ecosystem. Most remaining remnant native grasslands in Australia are under some form of grazing management, with some possible adverse impacts for endemic grassland biota. For the endangered pygmy bluetongue lizard (Tiliqua adelaidensis), grazing of its remnant native grassland habitat has been seen as a potential conservation threat. Aim We aimed to investigate whether lizards altered their basking and foraging behaviour as a response to simulated grazing of the grassland habitat surrounding their burrows. Methods We used field manipulations over 3 years event by manually removing above-ground vegetation in 1 m2 around occupied lizard burrows, to simulate intense grazing events. We video-recorded lizard responses to these manipulations. We filmed lizards before and after the simulated grazing event and monitored basking and foraging response. We also simultaneously filmed a control group of lizards that were not exposed to a simulated grazing event. Key results Although overall time spent basking did not differ between treatment and control groups, the lizards spent more of their basking time completely emerged (bold basking) in the grazing treatment, suggesting they changed behaviour after simulated grazing. Perhaps they were more confident of evading predators that they could more clearly see approaching. In one season lizards made more attempts to catch prey in the grazed treatment than in a control treatment following the treatment, suggesting that grazing might enhance visibility for the ambush predation method that these lizards use. Conclusions The results suggest that grazing may produce some benefits for lizards already established in burrows. This contrasts with some previous results and suggests that management of grazing regimes requires careful consideration of the conditions currently prevalent. In this case, the study was conducted during a drought period, and different results might have emerged in higher rainfall years. Implications Grazing management for lizard conservation requires detailed understanding of the complex relationships among lizard behaviour, vegetation cover and invertebrate prey availability.

REDUCING NITRATE LOSSES FROM SIMULATED GRAZING ON GRASSLAND LYSIMETERS IN IRELAND USING A NITRIFICATION INHIBITOR (DICYANDIAMIDE)

2012 ◽  
Vol 112B (1) ◽  
pp. 79-89
Author(s):  
Samuel J. Dennis ◽  
Keith C. Cameron ◽  
Hong J. Di ◽  
Jim L. Moir ◽  
Vincent Staples ◽  
...  
Keyword(s):  
Nitrification Inhibitor ◽  
Nitrate Losses ◽  
Simulated Grazing

scholarly journals Silicon uptake by a pasture grass experiencing simulated grazing is greatest under elevated precipitation

BMC Ecology ◽  
2018 ◽  
Vol 18 (1) ◽  
Author(s):  
James M. W. Ryalls ◽  
Ben D. Moore ◽  
Scott N. Johnson
Keyword(s):  
Pasture Grass ◽  
Silicon Uptake ◽  
Simulated Grazing

The effectiveness of dicyandiamide in reducing nitrous oxide emissions from a cattle-grazed, winter forage crop in Southland, New Zealand

2008 ◽  
Vol 48 (2) ◽  
pp. 160 ◽  
Author(s):  
L. C. Smith ◽  
C. A. M. de Klein ◽  
R. M. Monaghan ◽  
W. D. Catto
Keyword(s):  
Nitrous Oxide ◽  
New Zealand ◽  
Nitrous Oxide Emissions ◽  
N2o Emissions ◽  
Research Station ◽  
Forage Crops ◽  
N Losses ◽  
Forage Crop ◽  
Spring Period ◽  
Simulated Grazing

A study was conducted in Southland, New Zealand to: (i) measure nitrous oxide (N2O) emissions and nitrate (NO3–-N) leaching losses from a cattle-grazed, winter forage crop; and (ii) quantify the effect of dicyandiamide (DCD) in reducing these losses. Drainage losses were measured for 12 months (December 2005–November 2006) from a December-sown kale crop using 12 hydrologically isolated drainage plots at the Woodlands Research Station. N2O emissions were measured for 6 months (June–November) following simulated grazing of the crop in mid-June. N2O emissions from the bare ground following grazing of the crop amounted to 3.6 kg nitrogen (N)/ha for the winter–spring period. This figure is higher than that measured for pasture on the same soil type over a similar period. DCD application significantly reduced N2O emissions for the whole crop area by 25% over this period and reduced the N2O emission factor for urine by 54%. DCD application increased the length of time mineral N (0–10 cm soil depth) was maintained in the ammonium form and significantly reduced soil NO3–-N levels for 6 weeks following the simulated grazing. Annual NO3–-N losses in drainage under this winter forage crop were relatively high at 79 kg N/ha.year, with the majority of this (67%) being lost over the wet summer months (December–January rainfall 434 mm or 200% of normal) during crop growth. The application of DCD following the grazing resulted in a 47% decrease in NO3–-N leached over the winter–spring period (26 kg N/ha v. 14 kg N/ha) with this equating to a 29% decrease over the full 12-month measurement period. This study suggested that winter forage crops are major contributors to N losses from livestock farming systems in Southland and that DCD application following the grazing of such crops by cattle can significantly reduce N2O emissions and leaching N losses.

Suppresive plants as weed management tool: Managing Parthenium hysterophorus under simulated grazing in Australian grasslands

2019 ◽  
Vol 247 ◽  
pp. 224-233 ◽  
Author(s):  
N. Khan ◽  
D. George ◽  
A. Shabbir ◽  
S.W. Adkins
Keyword(s):  
Weed Management ◽  
Parthenium Hysterophorus ◽  
Management Tool ◽  
Simulated Grazing

Effects of Simulated Grazing by Below-Ground Herbivores on Growth, CO 2 Exchange, and Carbon Allocation Patterns of Bouteloua gracilis

1980 ◽  
Vol 17 (3) ◽  
pp. 771 ◽  
Author(s):  
J. K. Detling ◽  
D. T. Winn ◽  
C. Procter-Gregg ◽  
E. L. Painter
Keyword(s):  
Carbon Allocation ◽  
Bouteloua Gracilis ◽  
Allocation Patterns ◽  
Below Ground ◽  
Simulated Grazing

Net photosynthesis, root respiration, and regrowth of Bouteloua gracilis following simulated grazing

Oecologia ◽  
1979 ◽  
Vol 41 (2) ◽  
pp. 127-134 ◽  
Author(s):  
J. K. Detling ◽  
M. I. Dyer ◽  
D. T. Winn
Keyword(s):  
Root Respiration ◽  
Net Photosynthesis ◽  
Bouteloua Gracilis ◽  
Simulated Grazing
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