Claim · model-written summary
Density increased in many plots between 1906 and 1978.
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingValueQualifier
Verbatim
e0“Total cover, density,and species diversity have increased more or less continuously in many plots between 1906 and 1978”
t0“vegetation”
Title
Vegetation Change and Plant Demography in Permanent Plots in the Sonoran Desert
Deborah E. Goldberg; Raymond M. Turner Ecology 1986. doi:10.2307/1937693
Other claims from this paper (11)
- Observation Vegetation composition showed no consistent directional change from 1906 to 1978.
- Observation Absolute cover and density fluctuated greatly for most species.
- Observation Dominant species had generally similar relative cover within each plot over time.
- Association Species cover responded strongly to extremely wet or dry years.
- Association Species density responded less strongly to climatic extremes than cover.
- Observation Total cover increased in many plots between 1906 and 1978.
- Observation Species diversity increased in many plots between 1906 and 1978.
- Observation Species formed five groups based on population dynamic traits.
- Observation One end of the species continuum had long lifespans, high survivorship, large mature size, low density, erratic recruitment and older age structure.
- Observation The other end of the continuum had short lifespans, low survivorship, small mature size, high density, frequent recruitment and young age structure.
- Association High early survivorship and erratic recruitment were not necessarily related.