The Dispersal Effectiveness of Avian Species in Japanese Temperate Forest

Kato, Daiki; Koike, Shinsuke

doi:10.2326/osj.17.173

Cited by 4 publications

(2 citation statements)

References 40 publications

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“…Because these axes are multiplicative, all combinations of quantity and quality yielding the same effectiveness value are connected by isoclines, which increase in value from lower left to upper right; this facilitates visual interpretation of the landscape (Figure 1). Effectiveness landscapes have proven very useful to evaluate the contributions of different interacting organisms to the recruitment of many plants and identifying which processes, whether quantity or quality related, mediate this function (Castro et al, 2017; Kato & Koike, 2018; McConkey et al, 2018). From this perspective, the effectiveness landscape has stimulated intensive research on the nature and identity of the most important interacting organisms for many plant species, mostly considering seed dispersal mutualisms (e.g.…”

Section: Introductionmentioning

confidence: 99%

The ecological and evolutionary significance of effectiveness landscapes in mutualistic interactions

2021

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Mutualism effectiveness, the contribution of an interacting organism to its partner's fitness, is defined as the number of immediate outcomes of the interactions (quantity component) multiplied by the probability that an immediate outcome results in a new individual (quality component). These components form a two‐dimensional effectiveness landscape with each species’ location determined by its values of quantity (x‐axis) and quality (y‐axis). We propose that the evolutionary history of mutualistic interactions leaves a footprint that can be identified by three properties of the spatial structure of effectiveness values: dispersion of effectiveness values, relative contribution of each component to the effectiveness values and correlation between effectiveness components. We illustrate this approach using a large dataset on synzoochory, seed dispersal by seed‐caching animals. The synzoochory landscape was clumped, with effectiveness determined primarily by the quality component, and with quantity and quality positively correlated. We suggest this type of landscape structure is common in generalised coevolved mutualisms, where multiple functionally equivalent, high‐quality partners exert similarly strong selection. Presumably, only those organisms located in high‐quality regions will impact the evolution of their partner. Exploring properties of effectiveness landscapes in other mutualisms will provide new insight into the evolutionary and ecological consequences of mutualisms.

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Section: Introductionmentioning

confidence: 99%

The ecological and evolutionary significance of effectiveness landscapes in mutualistic interactions

2021

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“…On the Pacific side, Z. japonicus frequently foraged for fruits of Mallotus japonicus , a pioneer plant species (Ueda, 1999). Kato and Koike (2018) observed that Z. japonicus functions as an effective seed disperser for Cerasus jamasakura and Cornus controversa in a temperate forest in eastern Japan. Kawakami et al (2009) reported that Z. japonicus mainly dispersed Ficus macrocarpa seeds on Bonin Islands.…”

Section: Introductionmentioning

confidence: 99%

Specific interactions in seed dispersal by the Japanese white‐eye Zosterops japonicus: Factors influencing its preference for two plant species, Aralia elata and Zanthoxylum ailanthoides

Kamei

Ohkawara

2022

Ecological Research

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Many frugivorous birds act as seed dispersers for freshly fruited plants. Typically, one bird species has multiple plant partners, functioning as a generalist disperser. However, specific interactions also can be formed, depending on the traits of birds and plants. Our field observation from 2017 to 2019 suggested that Zosterops japonicus as frugivore prefers the fruits of Aralia elata and Zanthoxylum ailanthoides, thus dispersing the seeds locally in central Japan. In this study, we examined the factors of the preference by comparing the morphological traits among plants and observing foraging efficiency on each plant. The tree traits of the two plants were characterized by large crop size and high number of fruits that Z. japonicus can forage on a certain point of a branch (NFZ). Their fruits were also characterized by small size and high share of lipids in the edible parts. The traits of edible parts differed between the two plants; A. elata fruits had succulent pulps, whereas Z. ailanthoides fruits only contained oil composed of oleic aids. Additionally, the number of fruits per second consumed by Z. japonicus was significantly higher in the two plants than those in other plants. The foraging efficiency was enhanced by large crop size, large NFZ, small fruit size, and high lipid content of fruits. The high foraging efficiency may increase the preference of Z. japonicus for the two plants, leading to the specific interactions.

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How many seeds can birds disperse?: Determining the pattern of seed deposition by frugivorous birds

Ohkawara,

Kimura,

Satoh

2023

Acta Oecologica

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The Dispersal Effectiveness of Avian Species in Japanese Temperate Forest

Cited by 4 publications

References 40 publications

The ecological and evolutionary significance of effectiveness landscapes in mutualistic interactions

The ecological and evolutionary significance of effectiveness landscapes in mutualistic interactions

Specific interactions in seed dispersal by the Japanese white‐eye Zosterops japonicus: Factors influencing its preference for two plant species, Aralia elata and Zanthoxylum ailanthoides

How many seeds can birds disperse?: Determining the pattern of seed deposition by frugivorous birds

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