scholarly journals HABITAT COMPLEXITY DISRUPTS PREDATOR–PREY INTERACTIONS BUT NOT THE TROPHIC CASCADE ON OYSTER REEFS

Ecology ◽  
2004 ◽  
Vol 85 (4) ◽  
pp. 995-1004 ◽  
Author(s):  
Jonathan H. Grabowski
Keyword(s):  
Trophic Cascade ◽  
Habitat Complexity ◽  
Oyster Reefs ◽  
Predator Prey

scholarly journals Pyramids and cascades: a synthesis of food chain functioning and stability

2018 ◽  
Author(s):  
Matthieu Barbier ◽  
Michel Loreau
Keyword(s):  
Food Chain ◽  
Trophic Cascade ◽  
Self Regulation ◽  
Quantitative Comparison ◽  
Food Chains ◽  
Fragmented Landscape ◽  
Size Spectra ◽  
Predator Prey ◽  
Theoretical Predictions ◽  
Chain Theory

AbstractFood chain theory is one of the cornerstones of ecology, providing many of its basic predictions, such as biomass pyramids, trophic cascades and predator-prey oscillations. Yet, ninety years into this theory, the conditions under which these patterns may occur and persist in nature remain subject to debate. Rather than address each pattern in isolation, we propose that they must be understood together, calling for synthesis in a fragmented landscape of theoretical and empirical results. As a first step, we propose a minimal theory that combines the long-standing energetic and dynamical approaches of food chains. We chart theoretical predictions on a concise map, where two main regimes emerge: across various functioning and stability metrics, one regime is characterized by pyramidal patterns, the other by cascade patterns. The axes of this map combine key physiological and ecological variables, such as metabolic rates and self-regulation. A quantitative comparison with data sheds light on conflicting theoretical predictions and empirical puzzles, from size spectra to causes of trophic cascade strength. We conclude that drawing systematic connections between various existing approaches to food chains, and between their predictions on functioning and stability, is a crucial step in confronting this theory to real ecosystems.

Hopf Bifurcation of a Generalized Delay-Induced Predator–Prey System with Habitat Complexity

2020 ◽  
Vol 30 (06) ◽  
pp. 2050082
Author(s):  
Zhihui Ma
Keyword(s):  
Hopf Bifurcation ◽  
Habitat Complexity ◽  
Sufficient Conditions ◽  
Explicit Formulas ◽  
Predator Prey ◽  
Dynamical Behaviors ◽  
Prey System ◽  
The Stability ◽  
Theoretical Results ◽  
Positivity And Boundedness

A delay-induced nonautonomous predator–prey system with variable habitat complexity is proposed based on mathematical and ecological issues, and this system is more realistic than the published models. Firstly, the permanence of the nonautonomous predation system is studied and some sufficient conditions are obtained. Secondly, the dynamical behaviors of the corresponding autonomous predation system are investigated, including the positivity and boundedness, and local and global stabilities. Thirdly, the properties of Hopf bifurcation of the autonomous predation system without/with delay are investigated and the explicit formulas which determine the stability and the direction of periodic solutions are obtained. Finally, a numerical example is given to test our theoretical results.

Dynamics of a stochastic Holling II predator-prey model with Lévy jumps and habitat complexity

2021 ◽  
pp. 2150077
Author(s):  
Guangjie Li ◽  
Qigui Yang
Keyword(s):  
Positive Solution ◽  
Habitat Complexity ◽  
Sufficient Conditions ◽  
Ultimate Boundedness ◽  
Predator Prey ◽  
Predator Prey Model ◽  
Prey Model ◽  
Global Positive Solution ◽  
Lévy Jumps ◽  
Lyapunov Technique

This paper investigates a stochastic Holling II predator-prey model with Lévy jumps and habit complexity. It is first proved that the established model admits a unique global positive solution by employing the Lyapunov technique, and the stochastic ultimate boundedness of this positive solution is also obtained. Sufficient conditions are established for the extinction and persistence of this solution. Moreover, some numerical simulations are carried out to support the obtained results.

Habitat complexity mediates the predator–prey space race

Ecology ◽  
2019 ◽  
Vol 100 (7) ◽  
Author(s):  
Justine A. Smith ◽  
Emiliano Donadio ◽  
Jonathan N. Pauli ◽  
Michael J. Sheriff ◽  
Owen R. Bidder ◽  
...  
Keyword(s):  
Habitat Complexity ◽  
Predator Prey ◽  
Space Race

Effects of Predator–Prey Interactions and Benthic Habitat Complexity on Selectivity of a Foraging Generalist

2010 ◽  
Vol 139 (4) ◽  
pp. 1004-1013 ◽  
Author(s):  
Michael J. Weber ◽  
John M. Dettmers ◽  
David H. Wahl ◽  
Sergiusz J. Czesny
Keyword(s):  
Habitat Complexity ◽  
Benthic Habitat ◽  
Predator Prey
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