Mangroves of Japan

Inoue, Tomomi; Kohzu, Ayato; Akaji, Yasuaki; Miura, Shingo; Baba, Shigeyuki; Oshiro, Nozomi; Kezuka, Mio; Kainuma, Mami; Tokuoka, Harumi; Naruse, Tohru

doi:10.1007/978-981-19-0519-3_18

Cited by 1 publication

(2 citation statements)

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“…All areas with mangroves on Iriomote Island have been designated as part of a national park, and in 2021 the entire island was designated as a Natural World Heritage Site (UNESCO World Heritage Centre, 2021). Since 1996, the mangrove extent of these marine ecoregions has increased by a net 0.39% (ISME, 2004;Inoue et al, 2022a).…”

Section: Spatial Distributionmentioning

confidence: 99%

“…To estimate the South Kuroshio mangrove ecosystem extent in 1970, we gathered reliable information on the mangrove area for each country within the province that can be used for an extrapolation (Table b). There are mangrove area estimates for Okinawa Prefecture in 1977 and 1997 based on aerial photo analysis with ground truth data (ISME, 2004;Inoue et al, 2022a). The mangrove areas in Okinawa Prefecture are equivalent to ~90% of the entire mangrove area of South Kuroshio.…”

Section: Authorsmentioning

confidence: 99%

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IUCN Red List of Ecosystems, Mangroves of the South Kuroshio

Inoue,

Baba,

Akaji

et al. 2024

Preprint

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Mangroves of the South Kuroshio is a regional ecosystem subgroup (level 4 unit of the IUCN Global Ecosystem Typology). It includes the marine ecoregions of the Central Kuroshio Current and South Kuroshio. In 2020, the mapped extent of the South Kuroshio mangrove province was 8.0 km2, representing less than 0.01% of the global mangrove area; the biota is characterized by 19 true mangrove species. Mangroves in this province are now well conserved, and their distribution is tending to expand through natural processes. Because this province is close to the northern limit of mangrove distribution, mangrove flora and fauna are adapted to low temperatures and distinct seasonality. Many of the effects of climate warming on the organisms living among mangroves remain unclear and need to be monitored. In 2020, the South Kuroshio mangroves cover 43% more area than our estimate for 1970. Since 1996, there has been a net increase in mangrove area of 0.39%. Although this trend might continue linearly over the next 50 years, in reality, the mangrove area should plateau when the maximum potential growth area of mangroves is reached. In contrast, spatially isolated and small-scale mangrove ecosystems are vulnerable in the event of a severe disruption impacting a wide area. Under a high sea-level rise scenario (IPCC RCP8.5) ≈8.2% of the South Kuroshio mangroves would be submerged by 2060. Moreover, 0.43% of the province’s mangrove ecosystem is undergoing degradation, with the potential to increase to 1.26% within a 50-year period, based on a vegetation index decay analysis. Overall, the South Kuroshio mangrove ecosystem is assessed as Least Concern (LC).

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Section: Spatial Distributionmentioning

confidence: 99%

Section: Authorsmentioning

confidence: 99%