Theory of alternative stable states
WebbThe approximate range for alternative stable states can be shown by plotting macrophyte coverage versus total phosphorus (Figure 2B). Apart from an unexplained increase of … Although alternative stable state theory is still in its infancy, empirical evidence has been collected from a variety of biomes : The Sahara region, once vegetated, suddenly collapsed into a desert about 5,000 to 6,000 years ago due to climate change... In the northeastern United States alternative ... Visa mer In ecology, the theory of alternative stable states (sometimes termed alternate stable states or alternative stable equilibria) predicts that ecosystems can exist under multiple "states" (sets of unique biotic and abiotic conditions). … Visa mer Ecosystems can shift from one state to another via a significant perturbation directly to state variables. State variables are quantities that change quickly (in ecologically-relevant time scales) in response to feedbacks from the system (i.e., they are … Visa mer Hysteresis is an important concept in alternative stable state theory. In this ecological context, hysteresis refers to the existence of different stable states under the same variables … Visa mer Most work on alternative stable states has been theoretical, using mathematical models and simulations to test ecological hypotheses. Other … Visa mer Alternative stable state theory was first proposed by Richard Lewontin (1969), but other early key authors include Holling (1973), Sutherland (1974), May (1977), and Scheffer et al. (2001). In the broadest sense, alternative stable state theory proposes that a … Visa mer It is also possible to cause state shifts in another context, by indirectly affecting state variables. This is known as the ecosystem perspective. This perspective requires a change in environmental parameters that affect the behavior of state variables. For … Visa mer By their very nature, basins of attraction display resilience. Ecosystems are resistant to state shifts – they will only undergo shifts under substantial perturbations – but some states are more resilient than others. In the ball-and-cup model, a valley with … Visa mer
Theory of alternative stable states
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Webb23 maj 2024 · The theory of alternate stable states provides an explanation for rapid ecosystem degradation, yielding important implications for ecosystem conservation and … Webbalternative stable states had been noted long before (Lewontin, 1969; Holling, 1973; May, 1977), but shallow lakes are often considered the first well documented example. This …
Webb5 juni 2014 · Let us assume we are given a trivially maximal, combinatorially maximal, almost surely stable functional acting canonically on a left-n-dimensional subring r ̃. Let Φ be a linear factor equipped with an essentially left-empty arrow. Webb20 dec. 2024 · We explore the concept of alternative stable states in unstable systems using the highly dynamic wetland ecosystems of North America's Prairie Pothole Region. …
Webb31 mars 2004 · During the last 20 years there have been several attempts to test the theory of alternative stable states using marine systems. The results have been mixed, and there have been conflicting interpretations of the outcomes. In an attempt to resolve some of the problems, the theory and evidence for alternative stable states are reviewed. WebbAlthough the theory of alternative stable states is well understood, whether multiple stable states actually occur in nature has been hotly debated, in part because of the difficulty of demonstrating their existence in nature but also because of the lack of clear guidelines regarding what needs to be checked for in the field and in experiments to
WebbIn the current work, stable prenucleated PbS quantum dots (QDs) with a sub-nanometer (0.8 nm) size have been successfully synthesized via a systematically designed experiment. A detailed analysis of critical nucleation, growth, and stability for such ultrasmall prenucleated clusters is done. The experimental strategy is based on …
Webb12 apr. 2024 · This study questions the importance of public debt in stable growth between 1980 and 2024, specifically, the Ricardian equivalence hypothesis and Keynesian view are questioned. This study used data obtained from the Northern Cyprus State Planning Office. A restricted vector autoregressive model is used to test the causal relationships … nuss operatieWebb1 sep. 2003 · The idea that alternative stable states may exist in communities has been a recurring theme in ecology since the late 1960s, and is now experiencing a resurgence of … nokona alpha select youth gloveWebbFör 1 dag sedan · Stable equilibrium (state): In ecological studies the state can be defined by the set of biotic and abiotic conditions observed for a focal ecosystem or component … nokona nlt classic leather glove conditionerWebbThe approximate range for alternative stable states can be shown by plotting macrophyte coverage versus total phosphorus (Figure 2B). Apart from an unexplained increase of total P between 1998 and 2001, the cycles suggest two critical P values: one for shifting to a vegetation dominated state at approximately 0.02 mg L"1 and one for loss of nuss pectus repairWebb25 feb. 2015 · Alternative stable states in ecology have been well studied in isolated, well-mixed systems. However, in reality, most ecosystems exist on spatially extended landscapes. Applying existing theory from dynamic systems, we explore how such a spatial setting should be expected to affect ecological resilience. no known drug allergies icd 10Webb20 dec. 2024 · December 20, 2024. Alternative stable states are nontransitory states within which communities can exist. However, even highly dynamic communities can be … nuss pectusWebbThere is growing interest in the application of alternative stable state (ASS) theory to explain major vegetation patterns of the world. Here, we introduce the theory as applied to the puzzle of nonforested (open) biomes growing in climates that are warm and wet enough to support forests (alternative biome states, ABSs). nus sports facilities covid