Determining the post-herbivore-exclusion effect on an intertidal community by the recovery response of a known dominant herbivore

2021 ◽  
pp. 1-12
Author(s):  
DC van den Berg ◽  
K Sethebe ◽  
GW Maneveldt
Keyword(s):  
Intertidal Community ◽  
Herbivore Exclusion ◽  
Recovery Response ◽  
Exclusion Effect

Response of fungal endophyte communities within Andropogon gerardii (Big bluestem) to nutrient addition and herbivore exclusion

2021 ◽  
Vol 51 ◽  
pp. 101043
Author(s):  
Monica Watson ◽  
Kathryn Bushley ◽  
Eric W. Seabloom ◽  
Georgiana May
Keyword(s):  
Fungal Endophyte ◽  
Andropogon Gerardii ◽  
Nutrient Addition ◽  
Big Bluestem ◽  
Herbivore Exclusion

scholarly journals Effects of Grazer Exclusion on Carbon Cycling in Created Freshwater Wetlands

Land ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 805
Author(s):  
Delanie M. Spangler ◽  
Anna Christina Tyler ◽  
Carmody K. McCalley
Keyword(s):  
Soil Carbon ◽  
Carbon Cycling ◽  
Belowground Biomass ◽  
Freshwater Wetlands ◽  
Wetland Creation ◽  
Free Access ◽  
Exclusion Experiment ◽  
Herbivore Exclusion ◽  
Sequestration Potential ◽  
Natural Wetlands

Wetland ecosystems play a significant role in the global carbon cycle, and yet are increasingly threatened by human development and climate change. The continued loss of intact freshwater wetlands heightens the need for effective wetland creation and restoration. However, wetland structure and function are controlled by interacting abiotic and biotic factors, complicating efforts to replace ecosystem services associated with natural wetlands and making ecologically-driven management imperative. Increasing waterfowl populations pose a threat to the development and persistence of created wetlands, largely through intensive grazing that can shift vegetation community structure or limit desired plant establishment. This study capitalized on a long-term herbivore exclusion experiment to evaluate how herbivore management impacts carbon cycling and storage in a created wetland in Western New York, USA. Vegetation, above- and belowground biomass, soil carbon, carbon gas fluxes and decomposition rates were evaluated in control plots with free access by large grazers and in plots where grazers had been excluded for four years. Waterfowl were the dominant herbivore at the site. Grazing reduced peak growing season aboveground biomass by over 55%, and during the summer, gross primary productivity doubled in grazer exclusion plots. The shift in plant productivity led to a 34% increase in soil carbon after exclusion of grazers for five growing seasons, but no change in belowground biomass. Our results suggest that grazers may inhibit the development of soil carbon pools during the first decade following wetland creation, reducing the carbon sequestration potential and precluding functional equivalence with natural wetlands.

scholarly journals Uniform persistence and almost periodic solutions of a nonautonomous patch occupancy model

2020 ◽  
Vol 2020 (1) ◽  
Author(s):  
Hui Zhou ◽  
Jehad Alzabut ◽  
Shahram Rezapour ◽  
Mohammad Esmael Samei
Keyword(s):  
Differential Inequality ◽  
Almost Periodic Solution ◽  
Rocky Intertidal ◽  
Uniform Persistence ◽  
Almost Periodic ◽  
Patch Occupancy ◽  
Sharp Threshold ◽  
Intertidal Community ◽  
Patch Occupancy Model ◽  
Inequality Techniques

Abstract In this paper, a nonlinear nonautonomous model in a rocky intertidal community is studied. The model is composed of two species in a rocky intertidal community and describes a patch occupancy with global dispersal of propagules and occupy each other by individual organisms. Firstly, we study the uniform persistence of the model via differential inequality techniques. Furthermore, a sharp threshold of global asymptotic stability and the existence of a unique almost periodic solution are derived. To prove the main results, we construct an appropriate Lyapunov function whose conditions are easily verified. The assumptions of the model are reasonable, and the results complement previously known ones. An example with specific values of parameters is included for demonstration of theoretical outcomes.

Timing of disturbance, top‐down, and bottom‐up driving on early algal succession patterns in a tropical intertidal community

2019 ◽  
Vol 68 (2) ◽  
pp. 135-143
Author(s):  
Jaruwan Mayakun ◽  
Anchana Prathep ◽  
Jeong Ha Kim
Keyword(s):  
Top Down ◽  
Bottom Up ◽  
Intertidal Community ◽  
Algal Succession

Climate-Related, Long-Term Faunal Changes in a California Rocky Intertidal Community

Science ◽  
1995 ◽  
Vol 267 (5198) ◽  
pp. 672-675 ◽  
Author(s):  
J. P. Barry ◽  
C. H. Baxter ◽  
R. D. Sagarin ◽  
S. E. Gilman
Keyword(s):  
Rocky Intertidal ◽  
Intertidal Community

Flowering, growth and defence in the two sexes: consequences of herbivore exclusion for Salix polaris

2002 ◽  
Vol 16 (5) ◽  
pp. 649-656 ◽  
Author(s):  
Carsten F. Dormann ◽  
Christina Skarpe
Keyword(s):  
Salix Polaris ◽  
Herbivore Exclusion

Recovery response of vertical gas wells in non-homogeneous landfills

2019 ◽  
Vol 83 ◽  
pp. 33-45 ◽  
Author(s):  
Qi-Teng Zheng ◽  
R. Kerry Rowe ◽  
Shi-Jin Feng
Keyword(s):  
Gas Wells ◽  
Recovery Response

scholarly journals Emotional, Cognitive and Self-Enhancement Processes in Aggressive Behavior After Interpersonal Rejection and Exclusion

2015 ◽  
Vol 11 (4) ◽  
pp. 707-721 ◽  
Author(s):  
Joanna Rajchert
Keyword(s):  
Aggressive Behavior ◽  
Ego Depletion ◽  
Self Control ◽  
Strength Model ◽  
Displaced Aggression ◽  
Cognitive Readiness ◽  
Interpersonal Rejection ◽  
The Relationship ◽  
Exclusion Effect

The relationship between exclusion or rejection and aggression is already well documented, but there is still a debate about the mechanisms that underlie this effect. In two studies we focused on the propensity to react aggressively (readiness for aggression) on the bases of emotional, cognitive or self-enhancement (personality-immanent) processes. In both studies we first measured readiness for aggression and then ego-depleted participants. Next, in Study 1 we excluded participants (n = 96) using an online ball throwing game and measured displaced aggressive behavior - intensity and duration of an unpleasant noise administrated to a stranger. In Study 2 participants (n = 140) were rejected by a peer on the basis of an interview that they gave and then could retaliate by reducing peer's chance for getting a job. The results show that exclusion effect on displaced aggression was moderated by cognitive readiness for aggression, while rejection effect on retaliatory aggression was shaped by emotional and personality-immanent readiness for aggression as well as ego-depletion. The results were discussed in light of the strength model of self-control by Baumeister, Vohs, and Tice (2007).

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