Spatial patterns of seed dispersal and seedling recruitment in <i>Corema album</i> (Empetraceae): the importance of unspecialized dispersers for regeneration

Calviño‐Cancela, María

doi:10.1046/j.1365-2745.2002.00711.x

Cited by 98 publications

(97 citation statements)

References 29 publications

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“…The spatial pattern for species that regenerate from seeds, such as oaks, depends on the distribution of the seeds (Calviño-Cancela 2002), which was created by seed dispersal ability (Tamme et al 2010;Zhang et al 2011). Oaks depend entirely on animals for the dispersal of their seeds, because they have not evolved any wind-dispersal structures (Jensen & Nielsen 1986).…”

Section: Discussionmentioning

confidence: 99%

Population structure and spatial pattern of predominant tree species in a pine–oak mosaic mixed forest in the Qinling Mountains, China

Kang

Zheng

Liu

et al. 2017

Journal of Plant Interactions

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This study investigated a typical pine-oak mosaic mixed forest in the Qinling Mountains, China. In the sample plot, the population structure and spatial distribution of the stems were analyzed for the predominant species, to identify the mechanisms of species coexistence and successional trends of the forest. The population structures of all species were bimodally distributed, with young trees (DBH <1 cm) more abundant than older trees. The population structures of Quercus aliena var. acuteserrata was bimodal and rather continuous. However, Pinus tabuliformis and Pinus armandii were discontinuously bimodal, with distinct size deficiencies. Q. aliena var. acuteserrata trees were clumped throughout the plot, although those of P. tabuliformis and P. armandii were clumped at small scales. Notable negative spatial associations between Q. aliena var. acuteserrata and P. tabuliformis were found at almost scales. P. armandii and Q. aliena var. acuteserrata were negatively spatially associated at small scales but positively associated at large scales. Our findings suggest that interspecific competition gradually develops among the predominant tree species. The dynamics of the pine-oak mosaic mixed forest formed a mosaic distribution of uniformly mixed types, with the slow infiltration of Q. aliena var. acuteserrata populations that would eventually establish a pure stand. ARTICLE HISTORY

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Section: Discussionmentioning

confidence: 99%

Population structure and spatial pattern of predominant tree species in a pine–oak mosaic mixed forest in the Qinling Mountains, China

Kang

Zheng

Liu

et al. 2017

Journal of Plant Interactions

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“…The following paragraphs explain the reasons for these temporal changes in horizontal structure and discuss the implications for forest management. The spatial distribution of species using seed regeneration strategies is largely determined by seed dispersal (Calviño-Cancela 2002). Since the cohort of small trees was dominated by F. orientalis at the initial stage, the observed clumped distribution of trees was likely related to the limited seed dispersal of this species caused by its heavy seeds (Habashi et al 2007;Hassani, Amani 2010;Akhavan et al 2012) and to seedbed conditions.…”

Section: Discussionmentioning

confidence: 99%

Spatial patterns of trees from different development stages in mixed temperate forest in the Hyrcanian region of Iran

Larsary¹,

Abkenar²,

Pourbabaei³

et al. 2018

J. For. Sci.

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Kazempour Larsary M., Taheri Abkenar K., Pourbabaei H., Pothier D., Amanzadeh B. (2018): Spatial patterns of trees from different development stages in mixed temperate forest in the Hyrcanian region of Iran. J. For. Sci., 64: 260-270.Mixed beech (Fagus orientalis Lipsky) forests are very important to the Hyrcanian region of Iran because of their high degree of naturalness and as a source of wood production. Determination of tree spatial patterns over development stages is a first step in understanding underlying processes driving regeneration and forest dynamics. Spatial patterns of trees from three development stages (initial, optimal and decay) of an untouched mixed beech forest were quantified within three 1-ha plots. To prepare the stem maps, we measured each tree with a DBH larger than 7.5 cm using the azimuth-distance method. Spatial patterns were then analysed using Ripley's K-function. Results indicated that the number of trees decreased from the initial stage to the decay stage, with tree spatial patterns being aggregated, slightly aggregated and highly randomized for initial, optimal and decay stages, respectively. Differences in spatial patterns among the development stages are not unexpected considering that such unmanaged forests are driven by gap dynamics which results in interactions between gap filling individuals.

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“…The SDE of P. parlatorei populations vary spatially, and the relationship between QC and QL components depends strongly on the habitat type (see Calviño-Cancela, 2002in Schupp et al, 2010 for a similar example). Between-habitat rather than between-site changes in dispersal components resulted in huge variation in plant establishment.…”

Section: Discussionmentioning

confidence: 99%

“…Despite the increasing number of studies that evaluate quantitative and qualitative components of SDE in individual plant species (e.g., Godínez-Alvarez et al, 2002;Schupp et al, 2010;Blendinger et al, 2011;McConkey et al, 2015;Rother et al, 2016), empirical evidence on the spatial variability in seed dispersal roles of functionally similar species is still extremely scarce (Calviño-Cancela, 2002;Bueno et al, 2013;Schleuning et al, 2015). The limited evidence suggests that in simple systems defined by plants with a low number of disperser species, functional equivalence is at least low, habitat-specific, and context-dependent.…”

Section: Introductionmentioning

confidence: 99%

Functional Equivalence in Seed Dispersal Effectiveness of Podocarpus parlatorei in Andean Fruit-Eating Bird Assemblages

Blendinger

2017

Front. Ecol. Evol.

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Most fleshy-fruited plants establish strong local interactions with a few fruit-eating species across their distribution range, which can differ among sites and have a major impact for the plant population dynamics. In turn, human disturbances alter both the original animal assemblage with which plants interact and the outcome of the mutualistic interaction. Negative consequences of human disturbances can be weakened when different seed dispersers exert similar effects on plant populations, being functionally equivalent. To understand the consequences of variability in seed dispersers on the recruitment of a long-lived tree species, I assessed changes in the assemblages of avian dispersers of Podocarpus parlatorei in subtropical Andean cloud-forests, and how these changes affect the outcome of the interaction at different spatial scales. The seed dispersal effectiveness (SDE) concept, defined as the likelihood of a seed removed by a fruit-eating bird to be dispersed to a suitable site for seed survival and germination, provides the framework to compare the contributions of different birds to seed dispersal. I compared the SDE in two old-growth forests dominated by P. parlatorei and a human disturbed forest, and in the main habitat types of these sites. In all sites, highest SDE values were provided by "gulpers" that swallow the whole fleshy cone ("fruit"), predominantly Elaenia and Turdus species. SDE was highest in forest edges and secondary forests, and negligible in other habitats. Equivalence in SDE was relatively low both within and between forest sites. Human forest disturbance modified the functional equivalence, the generalization in mutualistic interactions and the strength of SDE. Secondary forests showed the higher SDE and the greater richness of dispersers high in SDE; as a consequence, the ecological equivalence increased in the most suitable habitat for recruitment. This could lead to greater resilience of plant populations to local extinctions of dispersers, and allows the recovery of human disturbed forests. This study shows that in the replacement of functional equivalent species, the outcomes of the interactions are strongly affected by disperser abundance and habitat use, at the expense of dispersers' trait redundancy on plant population dynamics and community structure.

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Spatial patterns of seed dispersal and seedling recruitment in Corema album (Empetraceae): the importance of unspecialized dispersers for regeneration

Cited by 98 publications

References 29 publications

Population structure and spatial pattern of predominant tree species in a pine–oak mosaic mixed forest in the Qinling Mountains, China

Population structure and spatial pattern of predominant tree species in a pine–oak mosaic mixed forest in the Qinling Mountains, China

Spatial patterns of trees from different development stages in mixed temperate forest in the Hyrcanian region of Iran

Functional Equivalence in Seed Dispersal Effectiveness of Podocarpus parlatorei in Andean Fruit-Eating Bird Assemblages

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