Community stability under different correlation structures of species’ environmental responses

Ruokolainen, Lasse; Ranta, Esa; Kaitala, Veijo; Fowler, Mike S.

doi:10.1016/j.jtbi.2009.08.010

Cited by 19 publications

(22 citation statements)

References 39 publications

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“…Recent results suggest that this might have a qualitative impact on community responses to environmental reddening (Ruokolainen et al, 2009b). Previous results indicate that under weak competition environmental reddening always stabilises populations with overcompensating growth (Ruokolainen et al, 2009a), whereas under relatively strong competition population responses to reddening are expected to be sensitive to the magnitude of between-species environmental correlation (Ripa and Ives, 2003).…”

Section: Introductionmentioning

confidence: 99%

“…In competitive communities, the correlation between species-specific environmental effects (environmental correlation; the way each species is affected by environmental fluctuations) has been identified as an important factor affecting community stability and persistence (Ripa and Ives, 2003;Roughgarden, 1975b;Doak et al, 1998;Ives et al, 1999;Ruokolainen et al, 2007;Ruokolainen et al, 2009b;Ruokolainen and Fowler, 2008). Assuming uniform environmental correlation across species pairs, a general result is that undercompensating population dynamics always results in decreased population stability with environmental reddening (Ruokolainen et al, 2009a).…”

Section: Introductionmentioning

confidence: 99%

“…However, in the case of overcompensating population dynamics some studies have reported decreasing population stability under independent environmental effects and increasing stability under correlated environmental effects [e.g., (Ripa and Ives, 2003;Greenman and Benton, 2005b;Ruokolainen and Fowler, 2008)]. In contrast, other studies have found no qualitative difference between independent and correlated environmental effects (Ruokolainen et al, 2007;Ruokolainen et al, 2009b).…”

Section: Introductionmentioning

confidence: 99%

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The strength of species interactions modifies population responses to environmental variation in competitive communities

Ruokolainen

Ripa

2012

Journal of Theoretical Biology

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The strength of species interactions modifies population responses to environmental variation in competitive communities

Ruokolainen

Ripa

2012

Journal of Theoretical Biology

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“…From these simplified model systems it is known that the system-level consequences of environmental forcing depend on which nodes in the food web are being affected by external perturbations (Greenman and Benton, 2005a). The impact of environmental variation can also depend on the strength of species interactions within the food web (Ripa and Ives, 2003;Ruokolainen and Ripa, 2012;Ruokolainen et al, 2009b) and temporal characteristics of environmental fluctuations, such as variance and colour (Ruokolainen et al, 2009a). Variation in the colour (referring to the dominant mode of fluctuations; blue for fast and red for slow) of environmental fluctuations can have a different effect on species embedded in food webs, depending on their trophic position (affecting their demographic characteristics) Benton, 2005a, 2005b).…”

Section: Introductionmentioning

confidence: 99%

Environmental weakening of trophic interactions drives stability in stochastic food webs

Ruokolainen

McCann

2013

Journal of Theoretical Biology

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A 3-species food web model is analysed, with stochastic variation in parameters. Noise affects either resource growth or consumer intake as a Gaussian function. Noise variance, colour, and the consumers foraging adaptation rate is varied. Environmental characteristics impact on the consumer-resource interaction strength. Noise impact on population variability depends on where it hits in the food web. a r t i c l e i n f o t r a c tThe physiological performance and behaviour of organisms are contingent on environmental conditions. When these conditions vary over time, this can have important consequences for the dynamics of individual populations and entire species communities. While the importance of environmental variation on the structuring and stability of natural food webs is recognised, little work has been done so far to build up a theoretical understanding of these processes. Here we investigate a simple model food web, where a consumer species forages flexibly upon two distinct, inter-competing resource species. Resource productivities or the resource intake rates by the consumer are assumed to depend on environmental conditions in a realistic manner. Fluctuations in these parameters drive variation in the strength of consumer-resource interactions, depending on whether the resource or the consumer is sensitive to environmental noise. The way resources and the consumer respond to changes in environmental conditions stems from the deterministic influence of each stochastic parameter on food web dynamics, which interact with the consumer adaptation process as well as between-resource competition. According to recent empirical reports, the mechanisms behind our results are likely to be relevant in natural systems and thus the model predictions are of potential importance in understanding food web responses to environmental stochasticity in general.

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“…Sobre la diversidad en el plancton, Margalef (1957), Flöder y Sommer (1999, Beisner (2001) manifestaron que la heterogeneidad temporal en la disponibilidad de recursos y el nivel de fluctuación del ambiente físico tienen un fuerte impacto y están estrechamente relacionados, sin embargo no habría claridad en la forma como opera estos procesos. Aunque la comprensión de este tipo de mecanismos sigue siendo un desafío para los investigadores (Gaston, 2000), se reconoce a la variabilidad temporal de las condiciones del ambiente como factor determinante de la estructura de las comunidades (Rutherford et al, 1999;Ruokolainen et al, 2009). Aranguren et al (2011), identificaron el grado de variación temporal de las condiciones del hábitat como el factor que mejor explica los cambios en la riqueza de crustáceos planctónicos en sistemas lénticos del Neotrópico, especialmente por la variación de la profundidad máxima, temperatura y concentración de oxígeno.…”

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Zooplankton Responses In A Tropical System With Environmental Stress

Riaño

Monroy-González²

2014

Acta biol. Colom.

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RESUMENLos procesos de transformación ambiental que se dan en la actualidad en un marco de cambio climático, generan modificaciones en los ecosistemas y comunidades biológicas, ¿cómo responden las poblaciones a estos factores de tensión?, ¿qué efectos se darían sobre la diversidad taxonómica y ecológica? Se analizó la variación de la composición taxonómica y estructura del zooplancton en función de los cambios ambientales en un reservorio tropical ubicado a 6º 02' 18" N y 73º 29' 16" O. Semanalmente se realizaron muestreos en la zona limnética del sistema durante cuatro meses que abarcaron los periodos seco, de transición y de alta precipitación. Se estableció un alto grado de variabilidad temporal asociada al poco tiempo de retención hidráulica estimado en ocho días. Se registraron nueve especies en el zooplancton, entre ellas Keratella tropica tropica y Thermocyclops decipiens que fueron las más abundantes y constantes. Los valores de diversidad H' y riqueza S hallados se consideran bajos, lo que corresponde a una comunidad poco madura vinculada a un ambiente físico fluctuante, evidenciado en los elevados coeficientes de variación de la conductividad eléctrica y la transparencia Secchi. La fluctuación del volumen del sistema en lapsos cortos de tiempo, genera cambios significativos en la expresión física del sistema con efecto directo sobre la composición y estructura del zooplancton. En general el modelo de respuesta del zooplancton en este reservorio, se ajusta a los supuestos de la hipótesis de disturbio intermedio.Palabras clave: embalse La Chapa, hipótesis del disturbio intermedio, tensión ambiental, zooplancton. ABSTRACTProcesses of environmental transformation that currently occur in the climatic change context generate changes in ecosystems and biological communities. ¿how populations respond to these stressors? ¿what effects could occur on taxonomic and ecological diversity? The taxonomic composition and structure of the zooplankton was analyzed with relationship to environmental changes in a tropical water reservoir located at 6º 02' 18" N and 73º 29' 16" W. During four months, samples were taken weekly covering stations of low, medium, and high precipitation. A high degree of temporal variability was established, it associated with a short hydraulic retention time estimated at eight days. Nine species of zooplankton were

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Community stability under different correlation structures of species’ environmental responses

Cited by 19 publications

References 39 publications

The strength of species interactions modifies population responses to environmental variation in competitive communities

The strength of species interactions modifies population responses to environmental variation in competitive communities

Environmental weakening of trophic interactions drives stability in stochastic food webs

Zooplankton Responses In A Tropical System With Environmental Stress

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