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Article
Forestry
Shin-Ichiro Aiba et al.
Summary: The study revealed that climate and geohistory jointly influence the tree-community composition and diversity of old-growth forests in Japan's transitional zone from temperate to subtropical regions. Vegetation types and endemic species in different regions have significant effects on species richness.
JOURNAL OF FOREST RESEARCH
(2021)
Article
Forestry
Tetsuto Abe et al.
Summary: The study surveyed the vegetation of sites in Yambaru forests on Okinawa Island, identifying 11 potential indicator species with Distylium racemosum considered the most useful. Woody traits were found to be associated with forest age, explaining why D. racemosum is an indicator of priority forests.
JOURNAL OF FOREST RESEARCH
(2021)
Article
Zoology
Shizuma Yanagisawa et al.
Summary: Two new species of cockroaches from the Nansei Islands in Southwest Japan were compared to closely related congeners, showing distinct morphological and genetic differences, supporting their recognition as separate species. Morphometric and genetic analysis revealed similarities in the sizes of genitalia among the three Japanese species, distinguishing them from the zonata population of E. dasytoides.
ZOOLOGICAL SCIENCE
(2021)
Article
Forestry
Kento Rammitsu et al.
Summary: Epiphytic orchids play a significant role in plant species diversity in forest canopies and rely on mycorrhizal fungi for survival. Dendrobium okinawense exhibits a highly specific association with the TU11 fungus, which seems to be relatively higher compared to other orchid species assessed in previous studies.
JOURNAL OF FOREST RESEARCH
(2021)
Article
Forestry
Asako Miyamoto et al.
Summary: The study focused on the relationship between landscape factors and roadkill incidents of the endangered Ryukyu long-furred rat in Yambaru, northern Okinawa-jima Island. It found a positive correlation between roadkill incidents and average vegetation height and percentage of pine forest area, with higher incidents in zones with higher levels of protection.
JOURNAL OF FOREST RESEARCH
(2021)
Article
Forestry
Ayaka Irei et al.
Summary: The study estimated the genome size of Garcinia subelliptica and developed a male-specific DNA marker, which could contribute to the more effective conservation of traditional landscapes and future village planning in the northern part of the main island of Okinawa.
JOURNAL OF FOREST RESEARCH
(2021)
Article
Forestry
Noriko Iwai
Summary: Research conducted on two endangered frog species in subtropical forests of Amami-Oshima Island suggests that the choice of breeding sites is primarily influenced by topographic factors, with anthropogenic factors playing a lesser role. For Babina subaspera, the size of the upstream contributing area and topographic wetness index were the most critical variables, while for Odorrana splendida, altitude was the key determinant. The study indicates that younger forests, areas with higher road density, and locations with more invasive mongooses are less likely to have a presence of the frogs.
JOURNAL OF FOREST RESEARCH
(2021)
Article
Forestry
Nobuhiko Kotaka et al.
Summary: The study found that the Okinawa woodpecker primarily uses tree species such as Castanopsis sieboldii, Melia azedarach, Alnus japonica, and Pinus luchuensis for nest trees, with the high frequency of Japanese Alder and Luchu Pine snags likely due to tree die-offs caused by introduced pests. To ensure stable nest tree availability for the woodpecker, it is recommended to preserve forests aged 60 years and older, retain some C. sieboldii trees during logging, and retain most regenerating M. azedarach trees during thinning in young forests.
JOURNAL OF FOREST RESEARCH
(2021)
Review
Multidisciplinary Sciences
S. L. Pimm et al.
Review
Multidisciplinary Sciences
Mark J. Costello et al.
Article
Multidisciplinary Sciences
Gerold Kier et al.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2009)