Spatial-temporal dependence of the neighborhood interaction in regulating tree growth in a tropical rainforest

Weng, Xu-Xiang; Yong, Guo; Tang, Zhiyao

doi:10.1016/j.foreco.2022.120032

Cited by 6 publications

(4 citation statements)

References 67 publications

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“…With that caveat our results suggest that competition for water might be important in other relatively wet tropical communities, especially if the stronger competitor can drive soil water potential below that tolerated by neighbors. This has been shown in semi-arid systems (Callaway et al 1996) and suggests important avenues of study in wetter systems, where intense competition is theoretically important (Dobzhansky 1950, MacArthur 1969Bertness and Callaway 1994) and empirically demonstrated among dominant plant species (Uriarte et al 2018;Yang et al 2021;Weng et al 2022). However, this empirical evidence is predominantly based on demographic correlations, thus future experimentation holds a great deal of promise.…”

Section: Discussionmentioning

confidence: 73%

Competition for water and rapid exclusion of an island endemic by a pantropical species in a tropical climate

et al. 2023

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Water availability has major effects on community structure and dynamics globally, yet our understanding of competition for water in the tropics is limited. On the tropical Trindade Island, we explored competition for water in the context of the rapid exclusion of an endemic sedge, Cyperus atlanticus, by a pantropical shrub, Guilandina bonduc. Guilandina patches were generally surrounded by rings of bare soil, and dead Cyperus halos commonly surrounded these bare zones. With geo-referenced measurements, we showed that Guilandina patches and bare soil zones rapidly expanded and replaced adjacent Cyperus populations. We found that soil water potentials were much lower in bare soils than soils under Guilandina or Cyperus, and that leaf water potentials of Cyperus plants were lower when cooccurring with Guilandina than when alone. When Guilandina was removed experimentally, Cyperus populations expanded and largely covered the bare soil zones. Our results indicate that when Guilandina establishes, its root systems expand beyond its canopies and these roots pull water from soils beneath Cyperus and kill it, creating bare zone halos, and then Guilandina expands and repeats the process. This scenario indicates rapid competitive exclusion and displacement of an endemic by a common pantropical species, at least in part through competition for water.ASG thanks Marinha do Brasil for support, and Dr. Lucas Kruger and Leonardo A. Magalhães for help with statistics and Tácito B. Trindade for help in eld surveys.

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Section: Discussionmentioning

confidence: 73%

Competition for water and rapid exclusion of an island endemic by a pantropical species in a tropical climate

et al. 2023

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Section: Discussionmentioning

confidence: 83%

Competition for water and rapid exclusion of an island endemic by a pantropical species in a tropical climate

Gomes

Callaway

Rabelo

et al. 2022

Preprint

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Water availability has major effects on community structure and dynamics globally, yet our understanding of competition for water in the tropics is limited. On the tropical Trindade Island, we explored competition for water in the context of the rapid exclusion of an endemic sedge, Cyperus atlanticus, by a pantropical shrub, Guilandina bonduc. Guilandina patches were generally surrounded by rings of bare soil, and dead Cyperus halos commonly surrounded these bare zones. With geo-referenced measurements, we showed that Guilandina patches and bare soil zones rapidly expanded and replaced adjacent Cyperus populations. We found that soil water potentials were much lower in bare soils than soils under Guilandina or Cyperus, and that leaf water potentials of Cyperus plants were lower when co-occurring with Guilandina than when alone. When Guilandina was removed experimentally, Cyperus populations expanded and largely covered the bare soil zones. Our results indicate that when Guilandina establishes, its root systems expand beyond its canopies and these roots pull water from soils beneath Cyperus and kill it, creating bare zone halos, and then Guilandina expands and repeats the process. This scenario indicates rapid competitive exclusion and displacement of an endemic by a common pantropical species, at least in part through competition for water.

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“…However, few studies have investigated whether and how the effects of density dependence, phylogenetic density dependence, and habitat factors on seedling survival vary at different temporal and spatial scales. Previous studies found that neighborhood effect and habitat filtering on tree growth exhibited spatial–temporal dependence (Weng et al., 2022 ), which tended to be more varied with time (Bai et al., 2012 ). What is more, there has also been demonstrated variance over time in the phylogenetic distance of seedlings at a site (Webb et al., 2006 ), and the phylogenetic clustering of neighbors varies with spatial variation.…”

Section: Introductionmentioning

confidence: 96%

Phylogenetic indices and temporal and spatial scales shape the neighborhood effect on seedling survival in a mid‐mountain moist evergreen broad‐leaved forest, Gaoligong Mountains, Southwestern China

Wang,

Wu,

Chai

et al. 2024

Ecology and Evolution

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Density dependence and habitat filtering have been proposed to aid in understanding community assembly and species coexistence. Phylogenetic relatedness between neighbors was used as a proxy for assessing the degree of ecological similarity among species. There are different conclusions regarding the neighborhood effect in previous studies with different phylogenetic indices or at different spatiotemporal scales. However, the effects of density dependence, neighbor phylogenetic relatedness, and habitat filtering on seedling survival with different phylogenetic indices or at different temporal and spatial scales are poorly understood. We monitored 916 seedlings representing 56 woody plant species within a 4‐ha forest dynamics plot for 4 years (from 2020 to 2023) in a subtropical mid‐mountain moist evergreen broad‐leaved forest in the Gaoligong Mountains, Southwestern China. Using generalized linear mixed models, we tested whether and how four phylogenetic indices: total phylogenetic distance (TOTPd), average phylogenetic distance (AVEPd), relative average phylogenetic distance (APd′), and relative nearest taxon phylogenetic distance (NTPd′), three temporals (1, 2, and 3 years), and spatial scales (1, 2, and 4 ha) affect the effect of density dependence, phylogenetic density dependence, and habitat filtering on seedling survival. We found evidence of the effect of phylogenetic density dependence in the 4‐ha forest dynamics plot. The effects of density dependence, phylogenetic density dependence, and habitat filtering on seedling survival were influenced by phylogenetic indices and temporal and spatial scales. The effects of phylogenetic density dependence and habitat filtering on seedling survival were more conspicuous only at 1‐year intervals, compared with those at 2‐ and 3‐year intervals. We did not detect any effects of neighborhood or habitat factors on seedling survival at small scales (1 and 2 ha), although these effects were more evident at the largest spatial scale (4 ha). These findings highlight that the effects of local neighborhoods and habitats on seedling survival are affected by phylogenetic indices as well as temporal and spatial scales. Our study suggested that phylogenetic index APd′, shortest time scale (1 year), and largest spatial scales (4 ha) were suitable for neighborhood studies in a mid‐mountain moist evergreen broad‐leaved forest in Gaoligong Mountains. Phylogenetic indices and spatiotemporal scales have important impacts on the results of the neighborhood studies.

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Spatial-temporal dependence of the neighborhood interaction in regulating tree growth in a tropical rainforest

Cited by 6 publications

References 67 publications

Competition for water and rapid exclusion of an island endemic by a pantropical species in a tropical climate

Competition for water and rapid exclusion of an island endemic by a pantropical species in a tropical climate

Competition for water and rapid exclusion of an island endemic by a pantropical species in a tropical climate

Phylogenetic indices and temporal and spatial scales shape the neighborhood effect on seedling survival in a mid‐mountain moist evergreen broad‐leaved forest, Gaoligong Mountains, Southwestern China

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