Effect of Fear on Interacting Species Dynamics with Nonlinear Predator Harvesting

2021 ◽  
Vol 9 (4) ◽  
pp. 403-427
Author(s):  
Lakshmi Narayan Guin ◽  
Ayantika Mapa ◽  
Santabrata Chakravarty
Keyword(s):  
Interacting Species ◽  
Species Dynamics

Varying effects of connectivity and dispersal on interacting species dynamics

2012 ◽  
Vol 242 ◽  
pp. 81-91 ◽  
Author(s):  
Kehinde Salau ◽  
Michael L. Schoon ◽  
Jacopo A. Baggio ◽  
Marco A. Janssen
Keyword(s):  
Interacting Species ◽  
Species Dynamics

scholarly journals Persistence and stability of interacting species in response to climate warming: The role of trophic structure

2020 ◽  
Author(s):  
Taranjot Kaur ◽  
Partha Sharathi Dutta
Keyword(s):  
Food Web ◽  
Climate Warming ◽  
Food Chain ◽  
Trophic Structure ◽  
Community Dynamics ◽  
Threshold Temperature ◽  
Individual Species ◽  
Past Century ◽  
Interacting Species ◽  
Species Dynamics

AbstractOver the past century, the Earth has experienced roughly 0.4–0.8°C rise in the average temperature and which is projected to increase between 1.4–5.8°C by the year 2100. The increase in the Earth’s temperature directly influences physiological traits of individual species in ecosystems. However, the effect of these changes in community dynamics, so far, remains relatively unknown. Here we show that the consequences of warming (i.e., increase in the global mean temperature) on the interacting species persistence or extinction are correlated with their trophic complexity and community structure. In particular, we investigate different nonlinear bioenergetic tri-trophic food web modules, commonly observed in nature, in the order of increasing trophic complexity; a food chain, a diamond food web and an omnivorous interaction. We find that at low temperatures, warming can destabilize the species dynamics in the food chain as well as the diamond food web, but it has no such effect on the trophic structure that involves omnivory. In the diamond food web, our results indicate that warming does not support top-down control induced co-existence of intermediate species. However, in all the trophic structures warming can destabilize species up to a threshold temperature. Beyond the threshold temperature, warming stabilizes species dynamics at the cost of the extinction of higher trophic species. We demonstrate the robustness of our results when a few system parameters are varied together with the temperature. Overall, our study suggests that variations in the trophic complexity of simple food web modules can influence the effects of climate warming on species dynamics.

Scaling species dynamics in Pinus palustris communities: Effects of pine straw raking

2002 ◽  
Vol 13 (6) ◽  
pp. 755-764 ◽  
Author(s):  
Lisa A. Kelly ◽  
Thomas R. Wentworth ◽  
Cavell Brownie
Keyword(s):  
Pinus Palustris ◽  
Pine Straw ◽  
Species Dynamics

Transiently linked nonlinear FENE two species dynamics

2021 ◽  
pp. 104720
Author(s):  
L.E. Quintero F. ◽  
L. Zhou ◽  
L.P. Cook
Keyword(s):  
Species Dynamics

scholarly journals The geographic mosaic of coevolution in mutualistic networks

2018 ◽  
Vol 115 (47) ◽  
pp. 12017-12022 ◽  
Author(s):  
Lucas P. Medeiros ◽  
Guilherme Garcia ◽  
John N. Thompson ◽  
Paulo R. Guimarães
Keyword(s):  
Gene Flow ◽  
Species Interactions ◽  
Analytical Approximation ◽  
Spatial Processes ◽  
Geographic Mosaic ◽  
Generalist Species ◽  
Interacting Species ◽  
Adaptive Landscapes ◽  
Surprising Effect ◽  
Mutualistic Networks

Ecological interactions shape adaptations through coevolution not only between pairs of species but also through entire multispecies assemblages. Local coevolution can then be further altered through spatial processes that have been formally partitioned in the geographic mosaic theory of coevolution. A major current challenge is to understand the spatial patterns of coadaptation that emerge across ecosystems through the interplay between gene flow and selection in networks of interacting species. Here, we combine a coevolutionary model, network theory, and empirical information on species interactions to investigate how gene flow and geographical variation in selection affect trait patterns in mutualistic networks. We show that gene flow has the surprising effect of favoring trait matching, especially among generalist species in species-rich networks typical of pollination and seed dispersal interactions. Using an analytical approximation of our model, we demonstrate that gene flow promotes trait matching by making the adaptive landscapes of different species more similar to each other. We use this result to show that the progressive loss of gene flow associated with habitat fragmentation may undermine coadaptation in mutualisms. Our results therefore provide predictions of how spatial processes shape the evolution of species-rich interactions and how the widespread fragmentation of natural landscapes may modify the coevolutionary process.

scholarly journals An ecocultural model predicts Neanderthal extinction through competition with modern humans

2016 ◽  
Vol 113 (8) ◽  
pp. 2134-2139 ◽  
Author(s):  
William Gilpin ◽  
Marcus W. Feldman ◽  
Kenichi Aoki
Keyword(s):  
Cultural Change ◽  
Human Population ◽  
Competitive Exclusion ◽  
Modern Human ◽  
Learning Ability ◽  
Volterra Model ◽  
Modern Humans ◽  
Interacting Species ◽  
The Difference ◽  
Cultural Competition

Archaeologists argue that the replacement of Neanderthals by modern humans was driven by interspecific competition due to a difference in culture level. To assess the cogency of this argument, we construct and analyze an interspecific cultural competition model based on the Lotka−Volterra model, which is widely used in ecology, but which incorporates the culture level of a species as a variable interacting with population size. We investigate the conditions under which a difference in culture level between cognitively equivalent species, or alternatively a difference in underlying learning ability, may produce competitive exclusion of a comparatively (although not absolutely) large local Neanderthal population by an initially smaller modern human population. We find, in particular, that this competitive exclusion is more likely to occur when population growth occurs on a shorter timescale than cultural change, or when the competition coefficients of the Lotka−Volterra model depend on the difference in the culture levels of the interacting species.

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