scholarly journals Comment on “Plant diversity increases with the strength of negative density dependence at the global scale”

Science ◽  
2018 ◽  
Vol 360 (6391) ◽  
pp. eaar2435 ◽  
Author(s):  
Lisa Hülsmann ◽  
Florian Hartig
Keyword(s):  
Density Dependence ◽  
Plant Diversity ◽  
Global Scale ◽  
Negative Density Dependence

scholarly journals Response to Comment on “Plant diversity increases with the strength of negative density dependence at the global scale”

Science ◽  
2018 ◽  
Vol 360 (6391) ◽  
pp. eaar5245 ◽  
Author(s):  
Joseph A. LaManna ◽  
Scott A. Mangan ◽  
Alfonso Alonso ◽  
Norman A. Bourg ◽  
Warren Y. Brockelman ◽  
...  
Keyword(s):  
Density Dependence ◽  
Plant Diversity ◽  
Global Scale ◽  
Negative Density Dependence

scholarly journals Response to Comment on “Plant diversity increases with the strength of negative density dependence at the global scale”

Science ◽  
2018 ◽  
Vol 360 (6391) ◽  
pp. eaar3824 ◽  
Author(s):  
Joseph A. LaManna ◽  
Scott A. Mangan ◽  
Alfonso Alonso ◽  
Norman A. Bourg ◽  
Warren Y. Brockelman ◽  
...  
Keyword(s):  
Density Dependence ◽  
Plant Diversity ◽  
Global Scale ◽  
Negative Density Dependence

scholarly journals Are we missing the forest for the trees? Conspecific negative density dependence in a temperate deciduous forest

2021 ◽  
Author(s):  
Kathryn E. Barry ◽  
Stefan A. Schnitzer
Keyword(s):  
Life History ◽  
Density Dependence ◽  
Plant Community ◽  
Plant Diversity ◽  
Temperate Forest ◽  
Woody Plant ◽  
Community Level ◽  
Life History Strategies ◽  
Canopy Trees ◽  
Negative Density Dependence

AbstractOne of the central goals of ecology is to determine the mechanisms that enable coexistence among species. Evidence is accruing that conspecific negative density dependence (CNDD), the process by which plant seedlings are unable to survive in the area surrounding adults of their same species, is a major contributor to tree species coexistence. However, for CNDD to maintain diversity, three conditions must be met. First, CNDD must maintain diversity for the majority of the woody plant community (rather than merely specific groups). Second, the pattern of repelled recruitment must increase in with plant size. Third, CNDD must occurs across life history strategies and not be restricted to a single life history strategy. These three conditions are rarely tested simultaneously. In this study, we simultaneously test all three conditions in a woody plant community in a North American temperate forest. We examined whether the different woody plant growth forms (shrubs, understory trees, mid-story trees, canopy trees, and lianas) at different ontogenetic stages (seedling, sapling, and adult) were overdispersed – a spatial pattern indicative of CNDD – using spatial point pattern analysis across life history stages and strategies. We found that there was a strong signal of overdispersal at the community level. However, this pattern was driven by adult canopy trees. By contrast, understory plants, which can constitute up to 80% of temperate forest plant diversity, were not overdispersed as adults. The lack of overdispersal suggests that CNDD is unlikely to be a major mechanism maintaining understory plant diversity. The focus on trees for the vast majority of CNDD studies may have biased the perception of the prevalence of CNDD as a dominant mechanism that maintains community-level diversity when, according to our data, CNDD may be restricted largely to trees.

Plant diversity increases with the strength of negative density dependence at the global scale

Science ◽  
2017 ◽  
Vol 356 (6345) ◽  
pp. 1389-1392 ◽  
Author(s):  
Joseph A. LaManna ◽  
Scott A. Mangan ◽  
Alfonso Alonso ◽  
Norman A. Bourg ◽  
Warren Y. Brockelman ◽  
...  
Keyword(s):  
Species Diversity ◽  
Density Dependence ◽  
Rare Species ◽  
Species Abundance ◽  
Biotic Interactions ◽  
Global Scale ◽  
Latitudinal Shift ◽  
Negative Density Dependence ◽  
The Tropics ◽  
The Relationship

Theory predicts that higher biodiversity in the tropics is maintained by specialized interactions among plants and their natural enemies that result in conspecific negative density dependence (CNDD). By using more than 3000 species and nearly 2.4 million trees across 24 forest plots worldwide, we show that global patterns in tree species diversity reflect not only stronger CNDD at tropical versus temperate latitudes but also a latitudinal shift in the relationship between CNDD and species abundance. CNDD was stronger for rare species at tropical versus temperate latitudes, potentially causing the persistence of greater numbers of rare species in the tropics. Our study reveals fundamental differences in the nature of local-scale biotic interactions that contribute to the maintenance of species diversity across temperate and tropical communities.

scholarly journals Conspecific negative density dependence and why its study should not be abandoned

Ecosphere ◽  
2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Joseph A. LaManna ◽  
Scott A. Mangan ◽  
Jonathan A. Myers
Keyword(s):  
Density Dependence ◽  
Negative Density Dependence

scholarly journals Conspecific negative density dependence and why its study should not be abandoned

2020 ◽  
Author(s):  
Joseph A. LaManna ◽  
Scott A. Mangan ◽  
Jonathan A. Myers
Keyword(s):  
Density Dependence ◽  
Latitudinal Gradient ◽  
Null Model ◽  
Statistical Bias ◽  
Fitness Components ◽  
Density Dependent ◽  
Statistical Errors ◽  
Negative Density Dependence ◽  
Model Approach

AbstractRecent studies showing bias in the measurement of density dependence have the potential to sow confusion in the field of ecology. We provide clarity by elucidating key conceptual and statistical errors with the null-model approach used in Detto et al. (2019). We show that neither their null model nor a more biologically-appropriate null model reproduces differences in density-dependent recruitment between forests, indicating that the latitudinal gradient in negative density dependence is not an artefact of statistical bias. Finally, we suggest a path forward that combines observational comparisons of density dependence in multiple fitness components across localities with mechanistic and geographically-replicated experiments.

Shifts in species and phylogenetic diversity between sapling and tree communities indicate negative density dependence in a lowland rain forest

2010 ◽  
Vol 98 (1) ◽  
pp. 137-146 ◽  
Author(s):  
Mailyn A. Gonzalez ◽  
Aurélien Roger ◽  
Elodie A. Courtois ◽  
Franck Jabot ◽  
Natalia Norden ◽  
...  
Keyword(s):  
Density Dependence ◽  
Rain Forest ◽  
Phylogenetic Diversity ◽  
Lowland Rain Forest ◽  
Tree Communities ◽  
Negative Density Dependence
Sign in / Sign up

Export Citation Format

Share Document