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#Grime's triangle

4 public questions tagged with this topic.

Trade Off Grime Triangle

CSIR-NET: Grime’s triangle based classification includes:

“Ruderal, Competitive, Stress-tolerator” for csir-net: grime’s triangle based classification includes. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Survivorship curves summarize age-specific mortality: Type I concentrates loss late in life, Type II approximates a constant hazard, and Type III concentrates loss early. They are empirical patterns, not rigid taxonomic rules. The remaining alternatives—“Semelparous, Iteroparous, Annual”, “K-selected, r-selected, C-selected”, “Reproductive, Maintenance, Defense”—refer to different states, processes, or scales and therefore do not express the same causal relationship. Selection favors the schedule that increases lifetime reproductive success under local mortality and resource conditions. Body size, development time, fecundity, parental investment, and generation length consequently tend to covary. Field observations could test this account by measuring the proposed driver and the demographic or ecosystem response while controlling plausible confounding factors. This distinction matters because similar surface patterns can arise through different mechanisms, whereas ecological prediction depends on identifying the mechanism that actually changes rates.

Ref: Plant Strategies and Vegetation Processes, Grime, 2nd Ed.

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Trade Off Grime Triangle

Grime’s triangle includes which three strategies?

“Ruderal, Competitive, Stress-tolerant” for grime’s triangle includes which three strategies. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Survivorship curves summarize age-specific mortality: Type I concentrates loss late in life, Type II approximates a constant hazard, and Type III concentrates loss early. They are empirical patterns, not rigid taxonomic rules. The remaining alternatives—“Producer, Consumer, Decomposer”, “Predator, Prey, Parasite”, “Iteroparous, Semelparous, Annual”—refer to different states, processes, or scales and therefore do not express the same causal relationship. Selection favors the schedule that increases lifetime reproductive success under local mortality and resource conditions. Body size, development time, fecundity, parental investment, and generation length consequently tend to covary. Field observations could test this account by measuring the proposed driver and the demographic or ecosystem response while controlling plausible confounding factors. This distinction matters because similar surface patterns can arise through different mechanisms, whereas ecological prediction depends on identifying the mechanism that actually changes rates.

Ref: Plant Strategies and Vegetation Processes, Grime, 2nd Ed.

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Population Ecology

In Grime’s triangle, which is NOT correct?

The keyed exception is “Trees and shrubs are ruderal.” In the context of in grime’s triangle, which is not correct, that statement differs from the governing ecological pattern and must be evaluated against the mechanism rather than accepted from wording alone. Population ecology links individual births, deaths, immigration, and emigration to changes in abundance. Per-capita rates determine the direction of change, while density dependence creates feedback when crowding alters survival or reproduction. The remaining alternatives—“Ruderal species in high disturbance”, “Competitive species in high nutrients”, “Stress-tolerators in low disturbance”—refer to different states, processes, or scales and therefore do not express the same causal relationship. Interpretation must distinguish absolute population change from a per-capita rate and must state the time interval and population boundary. Age structure, dispersal, environmental variation, and delayed responses can all make observed trajectories depart from a simple model. This distinction matters because similar surface patterns can arise through different mechanisms, whereas ecological prediction depends on identifying the mechanism that actually changes rates.

Ref: Campbell Biology, Urry et al., 12th Ed., Unit 8 Ecology

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