Now showing items 1-10 of 18
Root competition can cause a decline in diversity with increased productivity
(Blackwell Science Ltd, 2003-06)
1 Plant community theory often invokes competition to explain why species diversity declines as productivity increases. Competition for all resources might become more intense and lead to greater competitive exclusion or, ...
Why does fertilization reduce plant species diversity? Testing three competition-based hypotheses
(Blackwell Science Ltd, 2002-04)
1 Plant species diversity drops when fertilizer is added or productivity increases. To explain this, the total competition hypothesis predicts that competition above ground and below ground both become more important, ...
The effect of mean and variance in resource supply on survival of annuals from Mediterranean and desert environments
(Springer-Verlag, 2004-10)
Resource availability is often characterized by mean annual amounts, while ignoring the spatial variation within habitats and the temporal variation within a year. Yet, temporal and spatial variation may be especially ...
The effect of initial density on interactions between bryophytes at individual and community levels
(Blackwell Science Ltd, 2000-04)
1 A glasshouse experiment was conducted with seven bryophyte species to determine the effects of competition. We tested whether competitive hierarchies varied with initial abundance (density and biomass) and between two ...
Seasonal changes in the respiratory electron transport system (ETS) and respiration of the zebra mussel, Dreissena polymorpha in Saginaw Bay, Lake Huron
(Kluwer Academic Publishers; Springer Science+Business Media, 2001-04)
Electron transport system activity (ETS) and respiration rates (R) of the zebra mussel, Dreissena polymorpha , were determined monthly from April to November over 2 years at two sites in Saginaw Bay, Lake Huron. The sites ...
Coastal eutrophication assessment in the United States
(Kluwer Academic Publishers; Springer Science+Business Media, Inc., 2006-04-21)
Recent national assessments document that nitrogen-driven coastal eutrophication is widespread and increasing in the United States. This significant coastal pollution problem includes impacts including increased areas and ...
Do Physiological Integration and Soil Heterogeneity Influence the Clonal Growth and Foraging of Schoenoplectus pungens ?
(Kluwer Academic Publishers; Springer, 2005-11)
Physiological integration and foraging behavior have both been proposed as advantages for clonal growth in heterogeneous environments. We tested three predictions concerning their short- and long-term effects on the growth ...
Quantitative partitioning of regional and local processes shaping regional diversity patterns
(Blackwell Science Ltd, 2006-02)
Seed mass, seedling size and neotropical tree seedling establishment
(Blackwell Science Ltd, 2005-12)
1 We examined among- and within-species effects of seed mass for seedling establishment from seed to 5 years of age in a field experiment at Paracou, French Guiana. 2 Six seeds of each of eight species were weighed and ...
Sources of reactive nitrogen affecting ecosystems in Latin America and the Caribbean: current trends and future perspectives
(Kluwer Academic Publishers; Springer Science+Business Media, Inc., 2006-04-06)
While the amount of reactive nitrogen circulating at the global level has increased markedly in the last century, the effects of this increase are largely seen at the regional level due to interacting ecological and ...