Why have endemic pollinators declined on the Ogasawara Islands?

Abe, Tetsuto; Makino, Shio; Okochi, Isamu

doi:10.1007/978-4-431-53859-2_13

Cited by 14 publications

(17 citation statements)

References 35 publications

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“…1a, d) (Karube and Suda 2004;Makihara et al 2004;Abe et al 2008a). The green anole lizard, Anolis carolinensis, which was originally distributed in the southeastern United States and the Caribbean islands, was introduced to the Ogasawara Islands in the 1960s (Hasegawa et al 1988;Toda et al 2010;Sugawara et al 2015).…”

Section: Predationmentioning

confidence: 99%

“…This arboreal lizard is a diurnal ambush hunter (Toda et al 2010). Gut content analysis and feeding experiments have indicated that green anoles prey on various arthropods (ants, bees, wasps, flies, beetles, bugs, butterflies, moths, and spi-ders), skinks, and arboreal snails (Table 1) (Karube and Suda 2004;Makihara et al 2004;Abe et al 2008a;Takahashi et al 2014). Comparisons of native species densities between anole-invaded and uninvaded sites (islands) have revealed that anole predation has caused the local extinction of and/or rapid declines in native damselflies, butterflies, bees, weevils, and longicorn beetles (Table 1) (Makihara et al 2004;Karube and Suda 2004;Karube 2004a, b;Takakuwa and Suda 2004;Abe et al 2008a;Abe et al 2011b).…”

Section: Predationmentioning

confidence: 99%

“…with introduced honeybees (Goubara 2002). Furthermore, not all native bees have declined, e.g., the largest bee, Xylocopa ogasawarensis, which frequently shares flower resources with honeybees, is a common flower visitor on inhabited islands where introduced honeybees are abundant (Abe et al 2008a;Sugiura 2008). This cannot be explained by resource competition with honeybees.…”

Section: Predation and Interspecific Competition In Beesmentioning

confidence: 99%

“…Recent studies have reported the importance of predation by the introduced lizard A. carolinensis in the decline of native bees (Karube and Suda 2004;Abe et al 2008a). Small bees, which can be easily preyed upon by the introduced lizard, have been declining on the inhabited islands that A. carolinensis has invaded, while the large bee, X. ogasawarensis, which is too large for A. carolinensis to feed on, has not declined on any of the islands (Karube and Suda 2004;Makihara et al 2004;Abe et al 2008aAbe et al , 2011b. Therefore, predation by introduced lizards has more likely reduced native bees than resource competition with introduced honeybees (Karube and Suda 2004;Abe et al 2008a).…”

Section: Predation and Interspecific Competition In Beesmentioning

confidence: 99%

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Impacts of introduced species on the biota of an oceanic archipelago: the relative importance of competitive and trophic interactions

Sugiura

2016

Ecological Research

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Introduced species negatively impact native species through competitive and trophic interactions, particularly on oceanic islands that have never been connected to any continental landmass. However, there are few studies on the relative importance of competitive interactions (resource competition with introduced species) and trophic interactions (predation or herbivory by introduced species) with respect to the negative impacts on native organisms on oceanic islands. A literature review on introduced and native species of the oceanic Ogasawara (Bonin) Islands in the western Pacific Ocean indicated that many native species (e.g., bees, beetles, damselflies, butterflies, land snails, birds, and plants) have been negatively impacted by introduced predators and herbivores (e.g., lizards, rats, flatworms, and goats). Several native plants and bees have been negatively affected by introduced competitors. However, the native species that have competed with introduced species have also suffered from either intense herbivory or predation by other introduced species. Thus, introduced predators and herbivores have had greater impacts on native species than introduced competitors in the Ogasawara Islands.

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Section: Predationmentioning

confidence: 99%

Section: Predationmentioning

confidence: 99%

Section: Predation and Interspecific Competition In Beesmentioning

confidence: 99%

Section: Predation and Interspecific Competition In Beesmentioning

confidence: 99%

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Impacts of introduced species on the biota of an oceanic archipelago: the relative importance of competitive and trophic interactions

Sugiura

2016

Ecological Research

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“…), invasive species (Abe et al . ), pesticides (Whitehorn et al . ), and global climate change (Deutsch et al .…”

Section: Overview Of Threatsmentioning

confidence: 99%

Conservation of Tropical Plant Biodiversity: What Have We Done, Where Are We Going?

Krupnick

2013

Biotropica

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Plant biodiversity in the tropics is threatened by intense anthropogenic pressures. Deforestation, habitat degradation, habitat fragmentation, overexploitation, invasive species, pollution, global climate change, and the synergies among them have had a major impact on biodiversity. This review paper provides a brief, yet comprehensive and broad, overview of the main threats to tropical plant biodiversity and how they differ from threats in temperate regions. The Global Strategy for Plant Conservation, an international program with 16 global targets set for 2020 aimed at understanding, conserving, and using sustainably the world's plant biodiversity, is then used as a framework to explore efforts in assessing and managing tropical plant conservation in a changing world. Progress on 13 of the 16 outcome-oriented targets of the Strategy is explored at the pantropical scale. Within each target, I address current challenges in assessing and managing tropical plant biodiversity, identify key questions that should be addressed, and suggest ways for how these challenges might be overcome.Abstract in Spanish is available in the online version of this article.

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Factors restricting the range expansion of the invasive green anoleAnolis carolinensison Okinawa Island, Japan

Suzuki‐Ohno

Morita

Nagata

et al. 2017

Ecology and Evolution

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The green anole Anolis carolinensis invaded the Ogasawara Islands in Japan, drove various native species to extinction, and its distribution expanded 14 years after initial establishment. A. carolinensis invaded Okinawa Island, but it has not expanded its distribution in more than 25 years, although its density is extremely high in the southern region. To determine whether A. carolinensis has the potential to expand its distribution on Okinawa Island, we performed phylogenetic analysis of mitochondrial ND 2 DNA sequences to study the origin of A. carolinensis that invaded Okinawa Island. We further used a species distribution model (MaxEnt) based on the distribution of native populations in North America to identify ecologically suitable areas on Okinawa Island. Nucleotide sequence analysis shows that the invader A. carolinensis originated in the western part of the Gulf Coast and inland areas of the United States and that a portion of the anoles on Okinawa was not introduced via the Ogasawara Islands. The MaxEnt predictions indicate that most areas in Okinawa Island are suitable for A. carolinensis . Therefore, A. carolinensis may have the potential to expand its distribution in Okinawa Island. The predictions indicate that habitat suitability is high in areas of high annual mean temperature and urbanized areas. The values of precipitation in summer in the northern region of Okinawa Island were higher compared with those of North America, which reduced the habitat suitability in Okinawa Island. Adaptation to low temperatures, an increase in the mean temperature through global warming, and an increase in open environments through land development will likely expand the distribution of A. carolinensis in Okinawa Island. Therefore, we must continue to monitor the introduced populations and be alert to the possibility that city planning that increases open environments may cause their range to expand.

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Why have endemic pollinators declined on the Ogasawara Islands?

Cited by 14 publications

References 35 publications

Impacts of introduced species on the biota of an oceanic archipelago: the relative importance of competitive and trophic interactions

Impacts of introduced species on the biota of an oceanic archipelago: the relative importance of competitive and trophic interactions

Conservation of Tropical Plant Biodiversity: What Have We Done, Where Are We Going?

Factors restricting the range expansion of the invasive green anoleAnolis carolinensison Okinawa Island, Japan

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