Land-use history impacts spatial patterns and composition of woody plant species across a 35-hectare temperate forest plot

Orwig, David A.; Aylward, Jason A.; Buckley, Hannah; Case, Bradley S.; Ellison, Aaron M.

doi:10.1101/2021.04.07.438791

Cited by 2 publications

(1 citation statement)

References 75 publications

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“…The mean annual temperature and precipitation are 7.1 C and 1066 mm, respectively. For the observational part of our study, we utilized the 35-ha HF ForestGEO plot where every woody stem >1 cm diameter at breast height (DBH) has been identified to species, tagged, geolocated, and its diameter measured (Orwig, Aylward, et al, 2022). The experimental portion of our study took place in plots that are adjacent to the ForestGEO plot (Appendix S1: Figure S1).…”

Section: Site Descriptionmentioning

confidence: 99%

Experimental and observational evidence of negative conspecific density dependence in temperate ectomycorrhizal trees

Jevon

Cruz

LaManna

et al. 2022

Ecology

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Conspecific negative density dependence (CNDD) promotes tree species diversity by reducing recruitment near conspecific adults due to biotic feedbacks from herbivores, pathogens, or competitors. While this process is well-described in tropical forests, tests of temperate tree species range from strong positive to strong negative density dependence. To explain this, several studies have suggested that tree species traits may help predict the strength and direction of density dependence: for example, ectomycorrhizal-associated tree species typically exhibit either positive or weaker negative conspecific density dependence. More generally, the strength of density dependence may be predictably related to other species-specific ecological attributes such as shade tolerance, or the relative local abundance of a species. To test the strength of density dependence and whether it affects seedling community diversity in a temperate forest, we tracked the survival of seedlings of three ectomycorrhizal-associated species experimentally planted beneath conspecific and heterospecific adults on the Prospect Hill tract of the Harvard Forest, in Massachusetts, USA. Experimental seedling survival was always lower under conspecific adults, which increased seedling community diversity in one of six treatments. We compared these results to evidence of CNDD from observed sapling survival patterns of 28 species over approximately 8 years in an adjacent 35-ha forest plot. We tested whether species-specific estimates of CNDD were associated with mycorrhizal association, shade tolerance, and local abundance. We found evidence of significant, negative conspecific density dependence (CNDD) in 23 of 28 species, and positive conspecific

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Section: Site Descriptionmentioning

confidence: 99%

Experimental and observational evidence of negative conspecific density dependence in temperate ectomycorrhizal trees

Jevon

Cruz

LaManna

et al. 2022

Ecology

View full text Add to dashboard Cite

show abstract

Stand spatial structure outcomes of forest adaptation treatments in northern hardwood forests in North America

Wikle

D’Amato

2023

Can. J. For. Res.

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Spatial arrangement of trees is determined by a complex suite of factors including disturbance history, competition, and resource availability. These spatial patterns drive adaptive capacity by influencing arrangement of growing space, neighborhood competitive relationships, and disturbance response, with irregular patterns supporting higher adaptive capacity. While spatial structure in relation to disturbance and climate change resilience has been studied in dry conifer forests and old-growth temperate forests, it has never been explored in the context of climate adaptive management in mesic, second-growth forests. To address this gap, we analyzed tree spatial patterns in second-growth northern hardwood forests under four different climate adaptation management approaches: no action; resistance or resilience to impacts of climate change; and transition to future-adapted forest types. We used spatial point statistics approaches to describe how patterns differed among the four treatments. We found that the treatments focused on future adaptation led to patterns with variable tree spacing and clumping, while those focused on perpetuating current conditions resulted in less pattern variation. This indicates that adaptation strategies that include uneven-aged regeneration methods that restore and maintain tree spatial patterns historically generated by gap dynamics can be successful in altering resource availability patterns and adaptation space in forest stands.

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Land-use history impacts spatial patterns and composition of woody plant species across a 35-hectare temperate forest plot

Cited by 2 publications

References 75 publications

Experimental and observational evidence of negative conspecific density dependence in temperate ectomycorrhizal trees

Experimental and observational evidence of negative conspecific density dependence in temperate ectomycorrhizal trees

Stand spatial structure outcomes of forest adaptation treatments in northern hardwood forests in North America

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