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4 results found
In the southern Appalachian forests, the regeneration of canopy trees is severely inhibited by Rhododendron maximum L., an evergreen understory shrub producing dense rhickets. While light availability is a major cause, other factors may also contribute to the absence of tree seedlings under R.…
Author(s): Thomas T. Lei, Shawn W. Semones, John F. Walker, Barton D. Clinton, Erik T. Nilsen
Keywords: Quercus rubra, Prunus serotina, Tsuga canadensis, recruitment limitation, shrub understories, shad adaptation, southern Appalachian forest
Source: Int. J. Plant Sci. 163(6): 991-1000
Year: 2002
Variable seed production may have important consequences for recruitment but poorly documented for frugivore-dispersed tropical trees. Recruitment limitation may also may be a critical spatial process affectng forest dynamics, but it is rarely assessed at the scale of individual trees. Over an 11-…
Author(s): Diane De Steven, S. Joseph Wright
Keywords: Barro Colorado Island, Panama, density dependence, Quaraibea asterolepis, recruitment limitation, seed production, seedling demography, Tetragastris panamensis, Trichilia tuberculata, tropical tree demography
Source: Ecology 83(8): 2315-2327
Year: 2002
Seed dormancy is assumed to be unimportant for population dynamics of temperate woody species, because seeds occur at low densities and are short lived in forest soils. However, low soil seed densities may result from low seed production, and even modest seed longevity can buffer against…
Author(s): Janneke Hille Ris Lambers, James S. Clark, Michael Lavine
Keywords: Bayesian statistics, bet hedging, recruitment limitation, seed banking, seed dormancy, Southern Appalachian forests, species coexistence
Source: Ecology. 86(1): 85-95
Year: 2002
We used strong inference with Akaike's Information Criterion (AIC) to assess the processes capable of explaining long-term (1984-1995) variation in the per capita rate of change of mottled sculpin (Cottus bairdi) populations in the Coweeta Creek drainage (USA). We sampled two fourth- and one fifth-…
Author(s): Gary D. Grossman, Robert E Ratajczak, J. Todd Petty, Mark D. Hunter, James T. Peterson, Gael Grenouillet
Keywords: Cottus bairdi, density dependence, density independence, floods and droughts, long-term population studies, mottled sculpin, population regulation, recruitment limitation, removal experiments, stream fish
Source: Ecological Monographs, Vol. 67(2): 217-234
Year: 2006