Community shifts, alternative stable states, biogeochemical controls and feedbacks in eutrophic coastal lagoons: a brief overview

2008 ◽  
Vol 18 (S1) ◽  
pp. S105-S117 ◽  
Author(s):  
Pierluigi Viaroli ◽  
Marco Bartoli ◽  
Gianmarco Giordani ◽  
Mariachiara Naldi ◽  
Sotiris Orfanidis ◽  
...  
Keyword(s):  
Coastal Lagoons ◽  
Alternative Stable States ◽  
Stable States ◽  
Community Shifts

Anthropogenic impacts on the ecosystems of coastal lagoons: modelling fundamental biogeochemical processes and management implications

2004 ◽  
Vol 55 (1) ◽  
pp. 67 ◽  
Author(s):  
Ian T. Webster ◽  
Graham P. Harris
Keyword(s):  
Coastal Lagoon ◽  
Nutrient Loading ◽  
Anthropogenic Impacts ◽  
Coastal Lagoons ◽  
Alternative Stable States ◽  
Nitrogen Loading ◽  
Biogeochemical Model ◽  
Nutrient Loads ◽  
Stable States ◽  
Flushing Rate

This paper presents a biogeochemical model of a coastal lagoon intended to be representative of lagoons occurring along the south-east and south-west coasts of Australia. Many of these lagoons are threatened by increased nutrient loads because of land use change, by alterations to their freshwater inflows and by modification to their tidal flushing regimens. The model simulates the biogeochemical response of the lagoon to nutrient (nitrogen) loading and includes nutrient transformation processes in the sediments, as well as in the water column. The paper focuses on the response of primary producers to increasing and decreasing nutrient loads and how the response is altered by changes in the flushing rate of the lagoon with the sea. In common with lakes, the modelled lagoon exhibits alternative stable states representing macrophyte or phytoplankton dominance depending on nutrient loading and history. A third state representing severe degradation occurs when denitrification shuts down. A characteristic of Australian coastal lagoon systems is that, due to highly sporadic rainfall patterns, nutrient inflows are dominated by intermittent extreme events. The modelling demonstrates that such a loading regimen may be expected to generally increase the vulnerability of the lagoon to increasing nutrient loads. The results of the analysis presented are pertinent to several questions raised by coastal managers, such as what are the expected benefits of improving flushing by dredging and what are the consequences of altering the timing and magnitudes of the loads reaching the lagoons?

Fire Feedbacks with Vegetation and Alternative Stable States

2009 ◽  
Vol 18 (1) ◽  
pp. 159-173 ◽  
Author(s):  
Brian Beckage ◽  
Chris Ellingwood ◽  
Keyword(s):  
Alternative Stable States ◽  
Stable States ◽  
Fire Feedbacks

Are systems with strong underlying abiotic regimes more likely to exhibit alternative stable states?

Oikos ◽  
2005 ◽  
Vol 110 (2) ◽  
pp. 409-416 ◽  
Author(s):  
Raphael K. Didham ◽  
Corinne H. Watts ◽  
David A. Norton
Keyword(s):  
Alternative Stable States ◽  
Stable States

scholarly journals Path-dependent institutions drive alternative stable states in conservation

2018 ◽  
Vol 116 (2) ◽  
pp. 689-694 ◽  
Author(s):  
Edward W. Tekwa ◽  
Eli P. Fenichel ◽  
Simon A. Levin ◽  
Malin L. Pinsky
Keyword(s):  
Renewable Resources ◽  
Path Dependence ◽  
Alternative Stable States ◽  
Stable State ◽  
Empirical Support ◽  
Stable States ◽  
Alternative Stable State ◽  
Important Challenge ◽  
Quantitative Analyses ◽  
Path Dependent

Understanding why some renewable resources are overharvested while others are conserved remains an important challenge. Most explanations focus on institutional or ecological differences among resources. Here, we provide theoretical and empirical evidence that conservation and overharvest can be alternative stable states within the same exclusive-resource management system because of path-dependent processes, including slow institutional adaptation. Surprisingly, this theory predicts that the alternative states of strong conservation or overharvest are most likely for resources that were previously thought to be easily conserved under optimal management or even open access. Quantitative analyses of harvest rates from 217 intensely managed fisheries supports the predictions. Fisheries’ harvest rates also showed transient dynamics characteristic of path dependence, as well as convergence to the alternative stable state after unexpected transitions. This statistical evidence for path dependence differs from previous empirical support that was based largely on case studies, experiments, and distributional analyses. Alternative stable states in conservation appear likely outcomes for many cooperatively managed renewable resources, which implies that achieving conservation outcomes hinges on harnessing existing policy tools to navigate transitions.

scholarly journals Effects of biological legacies and herbivory on fuels and flammability traits: A long-term experimental study of alternative stable states

2017 ◽  
Vol 105 (5) ◽  
pp. 1309-1322 ◽  
Author(s):  
Melisa Blackhall ◽  
Estela Raffaele ◽  
Juan Paritsis ◽  
Florencia Tiribelli ◽  
Juan M. Morales ◽  
...  
Keyword(s):  
Experimental Study ◽  
Alternative Stable States ◽  
Stable States ◽  
Biological Legacies

scholarly journals Resilience of Alternative Stable States during the Recovery of Shallow Lakes from Eutrophication: Lake Veluwe as a Case Study

Ecosystems ◽  
2007 ◽  
Vol 10 (1) ◽  
pp. 4-16 ◽  
Author(s):  
Bas W. Ibelings ◽  
Rob Portielje ◽  
Eddy H. R. R. Lammens ◽  
Ruurd Noordhuis ◽  
Marcel S. van den Berg ◽  
...  
Keyword(s):  
Shallow Lakes ◽  
Alternative Stable States ◽  
Stable States

Seasonal-dependence in the responses of biological communities to flood pulses in warm temperate floodplain lakes: implications for the “alternative stable states” model

2014 ◽  
Vol 76 (4) ◽  
pp. 579-594 ◽  
Author(s):  
Griselda Chaparro ◽  
María Soledad Fontanarrosa ◽  
María Romina Schiaffino ◽  
Paula de Tezanos Pinto ◽  
Inés O’Farrell
Keyword(s):  
Alternative Stable States ◽  
Floodplain Lakes ◽  
Stable States ◽  
Biological Communities ◽  
Flood Pulses ◽  
Warm Temperate ◽  
Seasonal Dependence

scholarly journals Catastrophic Hydraulic Failure and Tipping Points in Plants

2021 ◽  
Author(s):  
Daniel Johnson ◽  
Gabriel G Katul ◽  
Jean-Christophe Domec
Keyword(s):  
Water Potential ◽  
Plant Biomass ◽  
Spatial Scales ◽  
Alternative Stable States ◽  
Soil Water Potential ◽  
Tipping Points ◽  
Stable States ◽  
Xylem Embolism ◽  
Plant Hydraulics ◽  
Hydraulic Failure

Water inside plants forms a continuous chain from water in soils to the water evaporating from leaf surfaces. Failures in this chain result in reduced transpiration and photosynthesis and these failures are caused by soil drying and/or cavitation-induced xylem embolism. Xylem embolism and plant hydraulic failure share a number of analogies to “catastrophe theory” in dynamical systems. These catastrophes are often represented in the physiological and ecological literature as tipping points or alternative stable states when control variables exogenous (e.g. soil water potential) or endogenous (e.g. leaf water potential) to the plant are allowed to slowly vary. Here, plant hydraulics viewed from the perspective of catastrophes at multiple spatial scales is considered with attention to bubble expansion (i.e. cavitation), organ-scale vulnerability to embolism, and whole-plant biomass as a proxy for transpiration and hydraulic function. The hydraulic safety-efficiency tradeoff, hydraulic segmentation and maximum plant transpiration are examined using this framework. Underlying mechanisms for hydraulic failure at very fine scales such as pit membranes, intermediate scales such as xylem network properties and at larger scales such as soil-tree hydraulic pathways are discussed. Lacunarity areas in plant hydraulics are also flagged where progress is urgently needed.

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