scholarly journals Jasper Ridge Woody Plant Community Database

2012 ◽  
Vol 4 ◽  
pp. 433-433
Author(s):  
William Cornwell ◽  
David Ackerly

2021 ◽  
Vol 4 ◽  
pp. 100070 ◽  
Author(s):  
Samuel Kumi ◽  
Patrick Addo-Fordjour ◽  
Bernard Fei-Baffoe ◽  
Ebenezer J.D. Belford ◽  
Yaw Ameyaw


2011 ◽  
Vol 48 (5) ◽  
pp. 1098-1106 ◽  
Author(s):  
Zachary T. Brym ◽  
Jeffrey K. Lake ◽  
David Allen ◽  
Annette Ostling


2021 ◽  
Author(s):  
Kathryn E. Barry ◽  
Stefan A. Schnitzer

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.



Ecosystems ◽  
2018 ◽  
Vol 22 (3) ◽  
pp. 496-507
Author(s):  
Chisato Yamashina ◽  
Masaya Hara


2002 ◽  
Vol 31 (5) ◽  
pp. 914-922 ◽  
Author(s):  
Guillermo Logarzo ◽  
David B. Richman ◽  
William R. Gould


2003 ◽  
Vol 47 ◽  
pp. 499-504
Author(s):  
Takeshi OKABE ◽  
Takeshi YOSHIMURA ◽  
Toyokatsu YUUKI ◽  
Hiroshi TAKEBAYASHI


2017 ◽  
Vol 39 (1) ◽  
pp. 15 ◽  
Author(s):  
Carolina B. Trigo ◽  
Andrés Tálamo ◽  
Mauricio M. Núñez-Regueiro ◽  
Enrique J. Derlindati ◽  
Gustavo A. Marás ◽  
...  

In semiarid regions, livestock is concentrated around water sources generating a piosphere pattern (gradients of woody vegetation degradation with increasing proximity to water). Close to the water source, livestock may affect the composition, structure and regeneration strategies of woody vegetation. We used the proximity from a water source as a proxy of grazing pressure. Our objectives were (1) to compare woody vegetation attributes (richness, diversity, species composition, density and basal area) and ground cover between sites at two distances to a water source: near (higher grazing pressure) and far from the water source (lower grazing pressure), and (2) to quantify and compare cases of spatial association among the columnar cacti Stetsonia coryne (Salm-Dyck) Britton and Rose (Cactaceae), and the dominant tree Bulnesia sarmientoi Lorentz ex Griseb. (Zygophyllaceae). We used a paired design with eight pairs of rectangular plots distributed along a large and representative natural water source. We found lower total species richness, plant density and soil cover near than far from water source, and more cases of spatial associations between the two species studied. Our results show evidence of increased livestock impacts around water sources. However, we found no difference in terms of species composition or basal area at near versus far sites. We conclude that grazing pressure might be changing some attributes of the woody plant community, and that the association of young trees with thorny plants (grazing refuge) could be a regeneration mechanism in this semiarid forest with high grazing pressure.



2014 ◽  
Vol 171 (2) ◽  
pp. 219-228 ◽  
Author(s):  
Caleb P. Roberts ◽  
Christopher J. Mecklin ◽  
Howard H. Whiteman


2018 ◽  
Vol 5 (1) ◽  
pp. 107-115
Author(s):  
Pedro J. Leitão ◽  
Marcel Schwieder ◽  
Fernando Pedroni ◽  
Maryland Sanchez ◽  
José R. R. Pinto ◽  
...  


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