Search results for: Hiroya Yamano

Items from 1 to 20 out of 36 results

article

Understanding island residents’ anxiety about impacts caused by climate change using Best–Worst Scaling: a case study of Amami islands, Japan

Takahiro Kubo, Takahiro Tsuge, Hiroya Abe, Hiroya Yamano

Sustainability Science > 2019 > 14 > 1 > 131-138

Climate change poses significant risk to island communities; however, there has been limited quantitative investigation into local people’s perception toward the risk. This study applied Best–Worst Scaling (BWS) to understand residents’ anxieties about potential incidents caused by climate change in Amami islands, Japan. Through an interview with stakeholders, we selected five potential incidents...

article

TSUNAGARI: a new interdisciplinary and transdisciplinary study toward conservation and sustainable use of biodiversity and ecosystem services

Masahiro Nakaoka, Kenji Sudo, Mizuho Namba, Hideaki Shibata, more

Ecological Research > 2018 > 33 > 1 > 35-49

The expanding economical activities have accelerated losses of biodiversity and ecosystem services, which are especially pronounced in Asia. To find solutions to stop these losses, a group of scientists studying both ecological and social sciences has launched an interdisciplinary research network, entitled TSUNAGARI (Trans-System, UNified Approach for Global and Regional Integration of social-ecological...

article

Trajectories of exposure and vulnerability of small islands to climate change

Virginie K.E. Duvat, Alexandre K. Magnan, Russell M. Wise, John E. Hay, more

Wiley Interdisciplinary Reviews: Climate Change > 8 > 6 > n/a - n/a

This article advocates for a dynamic and comprehensive understanding of vulnerability to climate‐related environmental changes in order to feed the design of adaptation future pathways. It uses the trajectory of exposure and vulnerability (TEV) approach that it defines as ‘storylines of driving factors and processes that have influenced past and present territorial system exposure and vulnerability...

article

Improving the interpretability of climate landscape metrics: An ecological risk analysis of Japan's Marine Protected Areas

Jorge García Molinos, Shintaro Takao, Naoki H. Kumagai, Elvira S. Poloczanska, more

Global Change Biology > 23 > 10 > 4440 - 4452

Conservation efforts strive to protect significant swaths of terrestrial, freshwater and marine ecosystems from a range of threats. As climate change becomes an increasing concern, these efforts must take into account how resilient‐protected spaces will be in the face of future drivers of change such as warming temperatures. Climate landscape metrics, which signal the spatial magnitude and direction...

article

The timing and the scale of the proliferation of Sargassum polycystum in Funafuti Atoll, Tuvalu

Serge Andréfouët, Claude Payri, Simon Van Wynsberge, Olivier Lauret, more

Journal of Applied Phycology > 2017 > 29 > 6 > 3097-3108

The biomass of the algal bloom of Sargassum polycystum along the lagoon shores of Funafuti Atoll (Tuvalu) was estimated in November 2014 using a multispectral spaceborne Pleiades image and concurrent field data. Field work established (1) the geographical limit of the distribution of the algae in the lagoon, (2) the different types of S. polycystum beds that developed in the lagoon, and (3) the range...

article

Reconstruction of the temporal distribution of 236U/238U in the Northwest Pacific Ocean using a coral core sample from the Kuroshio Current area

Tomoya Nomura, Aya Sakaguchi, Peter Steier, Rosmarie Eigl, more

Marine Chemistry > 2017 > 190 > C > 28-34

The temporal distribution of ²³⁶U in the Northwest Pacific Ocean was reconstructed through measurements of the annual changes in ²³⁶U/²³⁸U atom ratios in a coral core collected from Kume Island located within the Kuroshio Current region. In total, 74years (1940–2014) of temporal trend of ²³⁶U/²³⁸U atom ratios were reconstructed using Accelerator Mass Spectrometry (AMS). The annually resolved ²³⁶U/...

article

Habitat-forming seaweeds in Japan (fucoids and temperate kelps)

Naoki H. Kumagai, Hiroya Yamano, Masahiko Fujii, Yasuhiro Yamanaka

Ecological Research > 2016 > 31 > 6 > 759-759

This paper describes the flora of habitat-forming seaweeds (fucoids and temperate kelps) at 7673 sites of the Japanese coast encompassing its warm to cold temperate zone, recorded from 1887 to 2014. The data set includes 86 species (21,168 presence and 20,845 absence records), compiled from 355 literature sources, most of which were written in Japanese and published as grey literature in local journals...

article

Eco-geomorphic processes that maintain a small coral reef island: Ballast Island in the Ryukyu Islands, Japan

Hajime Kayanne, Kenji Aoki, Takuya Suzuki, Chuki Hongo, more

Geomorphology > 2016 > 271 > C > 84-93

Landform changes in Ballast Island, a small coral reef island in the Ryukyu Islands, were investigated by remote sensing analysis and a field survey. The area of the island almost doubled after a mass coral bleaching event in 1998. Coral branches generated by the mass mortality and broken by waves were delivered and stocked on a reef flat and accumulated to expand the area of the island. In 2012 high...

article

Evaluation of DSMs generated from multi-temporal aerial photographs using emerging structure from motion–multi-view stereo technology

Satoshi Ishiguro, Hiroya Yamano, Hiroyuki Oguma

Geomorphology > 2016 > 268 > C > 64-71

An accuracy assessment of digital surface models (DSMs) generated from archived aerial photographs using the structure from motion–multi-view stereo (SfM–MVS) technique was carried out. A four-step accuracy-assessment procedure was adopted using aerial photography from eight periods, as follows. Step 1: generate a DSM and orthophoto from digital aerial photographs taken in 2013 and ground control...

article

Post-bomb coral Δ¹⁴C record from Iki Island, Japan: possible evidence of oceanographic conditions on the northern East China Sea shelf

Takehiro Mitsuguchi, Masashi Hirota, Paleo Labo Ams Dating Group, Atsuko Yamazaki, more

Geo-Marine Letters > 2016 > 36 > 5 > 371-377

In this study, a sea-surface water Δ¹⁴C record of AD 1966–2000 (i.e., after the atmospheric nuclear-bomb testing period of the mid-1950s to early 1960s) was reconstructed from a coral sample collected from Iki Island, western Japan. The island is located in the Tsushima Strait where the Tsushima Current flows from the East China Sea (ECS) continental shelf into the Sea of Japan, indicating a strong...

chapter

Bottom-type classification in coral reef area using hyperspectral bottom index imagery

Shinya Odagawa, Tomomi Takeda, Hiroya Yamano, Tsuneo Matsunaga

2015 7th Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing (WHISPERS) > 1 - 4

2015 7th Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing (WHISPERS)

This paper describes a bottom-types classification method for mapping shallow coral reef area using hyperspectral bottom index (BI) imagery. Monitoring of coral reef degradation, especially coral bleaching, is important because coral reefs offer important ecosystem services. However, it is difficult to monitor coral reefs using spaceborne multispectral sensors due to spectral confusion between coral,...

article

Carbonate sedimentation on Pacific coral reefs

Hiroya Yamano, Yasufumi Iryu

Island Arc > 24 > 1 > 1 - 3

article

Modern carbonate sedimentary facies on the outer shelf and slope around New Caledonia

Hiroya Yamano, Guy Cabioch, Bernard Pelletier, Christophe Chevillon, more

Island Arc > 24 > 1 > 4 - 15

We investigated surface carbonate sediments at 33 sites on the outer shelf and slope around New Caledonia (163°–167°E, 20°–23°S), at water depths of 75–720 m. Four carbonate sedimentary facies are recognized on the basis of sediment size fractions and predominant constituents: Facies 1, encrusted grains (rhodoliths and macroids), bryozoa, and benthic foraminifera; Facies 2, bryozoa, benthic foraminifera,...

article

Conservation of low-islands: high priority despite sea-level rise. A comment on Courchamp et al.

Serge Andréfouët, Jérome Aucan, Hervé Jourdan, Paul Kench, more

Trends in Ecology & Evolution > 2015 > 30 > 1 > 1-2

article

Identification of important marine areas around the Japanese Archipelago: Establishment of a protocol for evaluating a broad area using ecologically and biologically significant areas selection criteria

Takehisa Yamakita, Hiroyuki Yamamoto, Masahiro Nakaoka, Hiroya Yamano, more

Marine Policy > 2015 > 51 > C > 136-147

After the adoption of the Aichi Target, data accumulation and evaluation regarding biodiversity have progressed rapidly. The use of ecologically and biologically significant areas (EBSAs) criteria to evaluate important areas enables the identification of effective and prioritized areas for ecosystem management. This includes strategic environmental assessment and discussions aimed at establishing...

article

Distribution of large benthic foraminifers around a populated reef island: Fongafale Island, Funafuti Atoll, Tuvalu

Kazuhiko Fujita, Sakie Nagamine, Yoichi Ide, Yu Umezawa, more

Marine Micropaleontology > 2014 > 113 > C > 1-9

Low-lying, small reef islands on Pacific atolls are vulnerable to coastal erosion and flooding, mainly due to rises in sea level, as well as local stresses associated with overpopulation. Because reef island sediments on Pacific atolls are composed mostly of shells of large benthic foraminifers (LBFs), their future stability depends on understanding foraminiferal shell sources and their production...

article

Late Holocene sea-level change and reef-island evolution in New Caledonia

Hiroya Yamano, Guy Cabioch, Christophe Chevillon, Jean-Lambert Join

Geomorphology > 2014 > 222 > Complete > 39-45

In New Caledonia, numerous cays are distributed on platform reefs in the southwest lagoon behind the barrier reef. At Mba Island, a vegetated sand cay in this area, we examined Holocene sea-level change, and reef development and evolution. The late Holocene sea-level curve for the area was updated using newly found fossil microatolls. Component-specific dating of foraminifera tests in the island sediment...

article

Sedimentary facies and Holocene depositional processes of Laura Island, Majuro Atoll

Toru Yasukochi, Hajime Kayanne, Toru Yamaguchi, Hiroya Yamano

Geomorphology > 2014 > 222 > Complete > 59-67

The depositional processes that formed Laura Island, Majuro Atoll, Marshall Islands, were reconstructed based on a facies analysis of island sediments and spine ratios, and radiocarbon ages of foraminifera. Sedimentary facies were analyzed from trenches and drill cores excavated on the island and its adjacent reef flat. Depositional ages were obtained using benthic foraminifera (Calcarina) whose spines...

article

Spatio‐temporal marine conservation planning to support high‐latitude coral range expansion under climate change

Azusa Makino, Hiroya Yamano, Maria Beger, Carissa J. Klein, more

Diversity and Distributions > 20 > 8 > 859 - 871

AimIncreasing sea‐surface temperatures (SST) have resulted in poleward range expansions of scleractinian corals and declines in their core ranges. These changes may provide management opportunities for the long‐term persistence of corals, but spatial prioritization rarely considers and anticipates these changes. We developed a spatio‐temporal conservation plan that accommodates future coral range...

article

Evaluation of Mn and Fe in coral skeletons (Porites spp.) as proxies for sediment loading and reconstruction of 50 yrs of land use on Ishigaki Island, Japan

Mayuri Inoue, Daisaku Ishikawa, Tsuzumi Miyaji, Atsuko Yamazaki, more

Coral Reefs > 2014 > 33 > 2 > 363-373

Manganese (Mn) and iron (Fe) concentrations were measured in coral skeletons (Porites spp.) collected from the Todoroki River on Ishigaki Island, Japan, to reconstruct the history of land use in the river catchment area. We prepared (1) five bulk samples to investigate the present spatial distribution and (2) micro-samples from two long cores to study the temporal variability of sediment loading from...

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INFONA - science communication portal

Search results for: Hiroya Yamano

Understanding island residents’ anxiety about impacts caused by climate change using Best–Worst Scaling: a case study of Amami islands, Japan

TSUNAGARI: a new interdisciplinary and transdisciplinary study toward conservation and sustainable use of biodiversity and ecosystem services

Trajectories of exposure and vulnerability of small islands to climate change

Improving the interpretability of climate landscape metrics: An ecological risk analysis of Japan's Marine Protected Areas

The timing and the scale of the proliferation of Sargassum polycystum in Funafuti Atoll, Tuvalu

Reconstruction of the temporal distribution of 236U/238U in the Northwest Pacific Ocean using a coral core sample from the Kuroshio Current area

Habitat-forming seaweeds in Japan (fucoids and temperate kelps)

Eco-geomorphic processes that maintain a small coral reef island: Ballast Island in the Ryukyu Islands, Japan

Evaluation of DSMs generated from multi-temporal aerial photographs using emerging structure from motion–multi-view stereo technology

Post-bomb coral Δ¹⁴C record from Iki Island, Japan: possible evidence of oceanographic conditions on the northern East China Sea shelf

Bottom-type classification in coral reef area using hyperspectral bottom index imagery

Carbonate sedimentation on Pacific coral reefs

Modern carbonate sedimentary facies on the outer shelf and slope around New Caledonia

Conservation of low-islands: high priority despite sea-level rise. A comment on Courchamp et al.

Identification of important marine areas around the Japanese Archipelago: Establishment of a protocol for evaluating a broad area using ecologically and biologically significant areas selection criteria

Distribution of large benthic foraminifers around a populated reef island: Fongafale Island, Funafuti Atoll, Tuvalu

Late Holocene sea-level change and reef-island evolution in New Caledonia

Sedimentary facies and Holocene depositional processes of Laura Island, Majuro Atoll

Spatio‐temporal marine conservation planning to support high‐latitude coral range expansion under climate change

Evaluation of Mn and Fe in coral skeletons (Porites spp.) as proxies for sediment loading and reconstruction of 50 yrs of land use on Ishigaki Island, Japan

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