So, Grime’s stress-disturbance

So, Grime’s stress-disturbance classification vs. Winemiller& Rose’s opportunistic-equilibrium-periodic classification.Things to know: variables associated with each. Types of organismsthat best fit each one (plants? Animals? Others?). Why are suchclassifications useful? What can we learn from them (exampletopics: conservation, invasive species, succession). I’m prettymuch giving you the one possible question, so I’ll be expectingsome depth here. Study well!


Winemiller & Rose’s opportunistic-equilibrium-periodicclassification

Opportunistic species are classified based on the factors likelow juvenile survival, a low number of offsprings and earlymaturity. Equilibrium species are classified based on the highjuvenile survival, low numbers of offsprings and late reproductivematurity. The periodic strategy involves low juvenile survival, thehigh number of offsprings and late maturity. Life histories thatlie on the triangular surface with three endpoints calledopportunistic, equilibrium and periodic. According to thisclassification, mammals show the least variation in the lifehistory strategies.

The variables associated with this classification type aresurvival, number of offsprings and age at reproductive maturity.Animals fit this type of classification better.

Benefits of this classification

Life history classification of animal species based on threetype of life histories, opportunistic, equilibrium andperiodic.

By plotting the variation among vertebrates based on their lifehistories on an axis using certain variables, the amount of lifehistory variation can be understood and observed among the groups.Example: Fish show great variation while mammals show the least.Intermediate variation is observed by birds, reptiles andamphibians.

The relationship between adult survival and reproductiveallocation is established.

The trade-off between offspring number and size is put by theconstraints due to energy use.

Grime’s stress-disturbance classification

High and low-stress intensities and disturbances are the mainfactors in classifying the plants as competitors, stress-toleratorsand ruderals. Stress tolerance is mainly dealt with mineralnutrition stress.

Some of the variables associated with this classification typeare environmental variables such as temperature and drought.Mineral nutrition is another variable. Plants fit this type ofclassification better. Ruderals are the plants that are found to bedominant under high disturbance and low-stress conditions. No plantcan survive under high stress and high disturbance. Plants dominantunder low disturbance and high stress are stress tolerant ones.

Benefits of this classification

The study of the relationship between the timing of ecologicalevents and climate is done here.

For example, winter migratory patterns and timing of flowerblooms.

Study of plants and classifying them as rapidly growing, shortlifespan, semelparity and dormancy. Some plants classified asherbivores with poor resource conditions and growing veryslowly.

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