cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.3535/dmv-ba5-2le
title: Oxybasis Kar. & Kir.

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.3535/dmv-c8j-j1y
title: Carex magellanica subsp. irrigua (Wahlenb.) Hiitonen

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.57765/2003410
title: Aerial footages of the July 2025 eruption of Shinmoedake volcano (Kirishima) taken using drone

description: Aerial footages of Shinmoe-dake, Kirishima, regarding the 2025 eruption taken using drone from 3rd to 7th July 2025. The drone used was Mavic 3 Thermal.
DOI: 10.20783/dias.jle.80
title: The long-term drive count and culling data of the sika deer (Cervus nippon) population introduced on Nakanoshima Island in Lake Toya, Hokkaido, Japan, during 1980-2023

description: Cervid populations introduced to favorable habitats in confinement often increase excessively without predators and hunting. Overabundant deer populations impact the ecosystems and may cause damages to agriculture and forestry. Long-term count data on the changes in a deer population is essential to understand the relationship between the population dynamics and the natural vegetation. The introduced sika deer (Cervus nippon Temminck, 1836) population without predators on Nakanoshima Island, Hokkaido, Japan, showed repeated irruptions and declines with mass mortality and irregular culling between 1980s and 2000s. The overabundant deer significantly altered the natural vegetation, and density-dependent changes in population parameters such as body size and reproduction were observed. Here, we present the drive count and culling data to examine the population dynamics during 1980-2023. Deer were counted by 20-30 walking drivers and 2-3 observers on boats once per year in February or March. The number of counted deer rapidly increased from the original three introduced around 1960 to &gt;270 deer (the first peak) in two decades and decreased by half due to starvation and the first culling. Thereafter, the number of counted deer continued to increase with a lower growth rate, reached a higher peak (&gt;400, the second peak) than the first irruption in two decades, and decreased again by half due to starvation and the second culling. Although the number of counted deer increased again up to &gt;300 in several years, it decreased and was maintained at around 100 deer with the annual culling program since 2012. The complete data set for this abstract published in the Data Article section of the journal is available in electronic format in MetaCat in JaLTER at http://db.cger.nies.go.jp/JaLTER/metacat/metacat/ERDP-2024-06.1/jalter-en.
DOI: 10.3535/dmv-je4-yyg
title: Argentina anserina subsp. anserina

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.20783/dias.jle.87
title: Construction of digital databases of crop-growing calendars for Japanese crops

description: Accurate information on agricultural productivity is crucial to address the challenges faced by agriculture, including pest threats and climate change. Crop-growing calendars represent a vital source of information for understanding and managing agroecosystems and for enhancing agricultural productivity. This information is also essential for studying the relationship between crop growth stages and pest activity patterns, which is crucial for developing effective pest management strategies. This study systematically digitized the Japanese government's publicly available paper-based statistical data on crop-growing calendars for grain crops, vegetables, and fruit trees across the country. The paper provides a detailed account of the contents of the paper-based statistical data, the digitization procedure, the method for creating the database, and the database structure. This work represents a significant step toward making crop-growing calendar data more accessible and useful for agricultural research and applications. The detailed Metadata and complete data set are available in MetaCat in JaLTER at https://jalter.diasjp.net/data/ERDP-2025-03.
DOI: 10.3535/dmv-nkc-gnl
title: Potentilla thuringiaca Bernh. ex Link

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.3535/dmv-pjr-a5g
title: Carex chordorrhiza L.f.

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.20783/dias.jle.90
title: Ash Content and Elemental Composition Dataset Assessing the Impact of Fire on Tropical Peat in Badas Peat Swamp Forest

description: This article presents data on ash content and selected nutrients from peat samples collected in the Badas peat swamp forest, located within the largest peat dome in Brunei Darussalam, northwest Borneo. Since the late 1990s, the Badas peat swamp forest has been affected by recurring forest fires near a drainage canal constructed in the 1950s. In 2019, two transects (Transect 1 and Transect 2) were set up perpendicular to the Badas canal, spaced 500 metres apart. Peat drives were collected from these transects to quantify ash content and the elemental compositions of aluminium, calcium, iron, and magnesium. A total of 25 sampling points, each with twelve peat drives sampled to a depth of 150 cm, were collected from the two transects using a Russian peat corer. Ash contents were measured to evaluate the applicability of the residual ash method in tropical peatlands. The datasets provide insights into the alteration of the physical and chemical properties of peat caused by fire and are relevant to peatland management and climate change mitigation efforts. Additionally, this dataset can support future studies on the impacts of fire in Borneo peatlands. While the residual ash method has limitations in reliably estimating carbon loss in degraded tropical peatlands, the ash content and elemental composition data presented here provide a valuable baseline for understanding fire-induced changes in peat soil chemistry. These datasets can also support broader ecological assessments, restoration planning, and comparative analyses across tropical peat systems. The Metadata is available in MetaCat in JaLTER at https://jalter.diasjp.net/data/ERDP-2025-05.
DOI: 10.3535/dmv-tz1-vpf
title: Dactylorhiza incarnata (L.) Soó

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.3535/dmv-yvn-9qn
title: Salix myrtilloides L.

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.3535/dmw-2wp-hw6
title: Carex acuta L.

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.20783/dias.jle.89
title: GFID: A Global Fish Invasion Database

description: Aquatic ecosystems are experiencing significant threats globally due to the widespread establishment of non-native fishes introduced via diverse anthropogenic pathways. Despite the recognition of their ecological, economic, and social impacts, a harmonized global resource focusing solely on established fish species has been lacking. We introduce a standardized global database encompassing 1,538 established non-native fish species across 193 countries (5,495 total occurrence records), integrating comprehensive metadata on introduction pathways (such as Escape from confinement, Release in nature, Transport as contaminant or stowaway, and Corridors; subcategories include Aquaculture, Ornamental trade, Fishery stocking, and Ballast water), habitat types (freshwater, marine, and freshwater–marine), native biogeographic realms (Nearctic, Neotropical, Palaearctic, Afrotropical, Indo-Malayan, Australasian, and mixed/cryptogenic), impacts, and first record timelines. Impacts are classified into environmental, economic, and social dimensions, with detailed mechanistic coding (e.g., competition, hybridization, disease transmission, predation). This database, curated from GBIF, FishBase, GRIIS, the SInAS workflow, and primary literature, is presented as a data paper and offers an essential foundation for invasion ecology, conservation planning, and biosecurity policy. The Metadata is available in MetaCat in JaLTER at https://jalter.diasjp.net/data/ERDP-2025-06.
DOI: 10.3535/dmw-3nc-vzy
title: Elodea canadensis Michx.

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.3535/dmw-4n5-8jb
title: Salix repens x ssp. repens var. repens × ssp. rosmarinifolia

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.20783/dias.jle.91
title: Expanded 28S rRNA Dataset for Environmental DNA Detection of Mesophotic and Deep-sea Octocorals in the Western Pacific

description: Environmental DNA (eDNA) metabarcoding is rapidly becoming an effective tool for biodiversity assessments. However, for taxa such as mesophotic and deep-sea octocorals, which are difficult to classify based on morphological and molecular grounds and are logistically challenging to sample using conventional SCUBA diving, accurately identified and curated specimens in biological repositories remain under-represented. This limitation reduces the availability of reliable reference sequences for eDNA detection. Mesophotic and deep-sea octocorals are key components of mesophotic and cold-water coral ecosystems that occur at depths &gt;30 m. Because these habitats are highly vulnerable to anthropogenic disturbances, the ability to monitor them effectively is imperative. This study aimed to expand the 28S rRNA reference database for mesophotic and deep-sea octocorals in the western Pacific Ocean. A total of 269 samples were sequenced using either Sanger sequencing or low-coverage genome skimming. Based on expert morphological identifications, the dataset comprised 52 genera spanning 24 families and two orders. Detailed metadata for all samples are provided, including DDBJ accession numbers, sampling locations, depths, collection dates, and repository information. These resources will strengthen biodiversity monitoring and support the conservation of mesophotic and cold-water coral ecosystems. The detailed Metadata and complete dataset are available in MetaCat in JaLTER at https://doi.org/10.20783/DIAS.JLE.91.
DOI: 10.3535/dmw-5ms-e43
title: Berteroa incana (L.) DC.

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.3535/dmw-mrq-b0r
title: Lycopodium clavatum L.

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.20783/dias.jle.42
title: Bees and their floral visits in Sapporo in 1979 and 1989

description: Bees are an important faunal group and function as pollinators for various flowering plants. The diversity and abundance of bees have decreased in some parts of the world, which has led to fears about habitat degradation and a pollination crisis worldwide. Therefore, establishing long-term monitoring systems and making past data available widely are important for understanding bees and their ecosystem function, and to enable evidence-based action for the conservation and restoration of bees and their ecosystem function. Decades ago, a group led by Shoichi F Sakagami established a systematic method of bee surveys and conducted surveys at multiple places in Japan. In Sapporo, intensive bee surveys involving sampling bees and recording the flowers that were visited by the bees from April to September were conducted systematically at the campus and Botanic Garden of Hokkaido University in 1979 and 1989. These involved sampling bees and recording the flowers that were visited by the bees from April to September. A total of 12,900 bee specimens were represented by Andrenidae, Apidae, Colletidae, Halictidae, Megachilidae and Melittidae. Here, we have converted the information to digital data by archiving the data on the bee species and the plant species that the bees visited in 1979 and 1989 at two sites at Hokkaido University, in Sapporo, Japan.
DOI: 10.3535/dmw-qkt-m5w
title: Potamogeton alpinus Balb.

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.20783/dias.jle.36
title: Long-term fauna and flora records of the experimental forests of the Forest Research Station of Hokkaido University, Japan

description: The Forest Research Station of Hokkaido University owns a vast area of experimental forests, which are composed of a large variety of ecosystems ranging from aquatic ecosystems, such as wetlands and river basins, to various types of forests, such as primary, secondary and artificial forests. Additionally, these forests are representative of numerous climatic zones, such as warm temperate, cool temperate, and subarctic. Since the initial establishment of the Forest Research Station in 1901, huge efforts have been devoted to recording the vegetation structure and vertebrate assemblages of these experimental forests. Thus, a large body of literature and long-term data on fauna and flora of these forests has been accumulated in our archives. However, most of these records have been written in Japanese and are not opened to the public or well structured. Therefore, we comprehensively reviewed these records and related scientific articles from the 1910s to the 2010s to build up the database for vascular plant and vertebrate animals that inhabited (in the past) and/or are currently inhabiting in the experimental forests. Additional site-specific information was also listed, including geological and topographical characteristics where species were found as well as the localities, survey area, and year in which species were recorded. These databases, which span a large temporal and spatial scale, are expected to provide useful data for research or educational purposes and for understanding the flora and fauna of Japan. These can also contribute to a greater understanding of the historical transition of biodiversity in Japan.
DOI: 10.3535/dmw-t9r-t48
title: Salix rosmarinifolia subsp. rosmarinifolia

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.3535/dmw-tbl-9qn
title: Potamogeton alpinus Balb.

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.20783/dias.jle.38
title: Taxonomy, Distribution, and Trait Data Sets of Japanese Collembola

description: In community ecology, trait-based approaches have been strongly recommended in recent years to understand the responses of community functions against environmental changes. Trait-based approaches have been used to solve the mechanistic rules in the relationship between soil animal communities and environmental change. However, databases of functional traits of soil animals are still lacking. Collembola is one of the most abundant and diverse group in land ecosystems, with more than 400 identified species in Japan. This dataset provides taxonomic information, geographic, habitat distributions, and 13 morphological trait items of 407 species of Japanese Collembola: described in Japanese literature. The workshop of Japanese Collembola, supported by the Japanese Society of Soil Zoology, summarized the taxonomy for the Japanese Collembola species. The dataset presented here is mainly based on their work. The spatial coverage of this dataset is in the land area of Japan. Suborder, superfamily, family, subfamily, genus, and species names, as well as common Japanese names, are listed in this paper. The species distributions of Japanese Collembola in each global ecozone and in each area within Japan were described. Habitat preference for soil, cave, seashore, and tree trunk habitats were recorded. The 13 morphological traits of Collembola species, which are body length; body weight of adult individual; body form; antenna length; furca length; body pigmentation; pairs of ocelli (eyes); post-antennal organ (PAO); pseudocelli; body scale; anal spine; mandible; and molar plate are listed in this dataset. These 13 morphological traits in this dataset are covered the most of trait items which have been internationally used in Collembola study. Trait-based studies of Collembola have mainly been for European species, most of which are not found in Japan or East Asia. These datasets may provide an important first step to incorporating community data from the Asian region to the trait-based global ecology. Data files are stored in the Ecological Research Data Archives (ERDP-2019-03).
DOI: 10.3535/dmw-wlm-hbx
title: Alliaria petiolata (M. Bieb.) Cavara & Grande

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.3535/dmx-1sw-zr4
title: Actaea spicata L.

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.20783/dias.jle.43
title: Photographic records of plant phenology and spring river flush timing in a river lowland ecosystem at the taiga–tundra boundary, northeastern Siberia

description: Arctic terrestrial ecosystems near the treeline in river lowlands are vulnerable to the changing climate and seasonal extreme events, including flooding. We set up a simple camera monitoring system to record the timings and durations of the leafy period and the spring flush of river water at three observation sites (Boydom [B]: 70.64°N, 148.15°E; Kodac [K]:70.56°N, 148.26°E; Verkhny-Khatistakh [VK]:70.25°N,147.47°E) in the Indigirka lowland, in north-eastern Siberia. Time-lapse digital cameras were located at seven points across the three sites. The time intervals were 1–4 or 24 hours. The minimum and maximum monitoring periods were 2-years (July-2016 to August-2018) at B and 5-years (August-2013 to July-2018) at K. One camera documented the timings of river ice melt and open water periods from the riverbank of the Kryvaya River, one of the small tributaries of the Indigirka River. The other six cameras recorded several types of ground cover typical of the area, including larch trees (Larix cajanderi), shrubs (including Salix spp., and Betula nana), forbs, mosses, and graminoids in an ecosystem of sparsely forested shrublands, wetlands, and riversides. The data consists of 45,617 JPEG-format images. This dataset can be used to detect the onset and offset of the growing season and to capture the ice melt timing and water cover periods in wetlands and riversides. It may be useful in validating satellite data such as the vegetation remote sensing index for remote and little-known areas. These data may contribute to the study of the role of high-latitude ecosystems in global climate changes.
DOI: 10.3535/dmx-3l8-x9f
title: Carex magellanica subsp. irrigua (Wahlenb.) Hiitonen

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.20783/dias.jle.41
title: Nitrate reductase activities in plants from different ecological and taxonomic groups grown in Japan

description: Plants generally use soil inorganic nitrogen, ammonium (NH4+-N), and nitrate (NO3--N) as sources of nitrogen, an essential nutrient. The assimilation processes after uptake differ considerably from ammonium to nitrate. Nitrate must be reduced to ammonium in plant tissue before it is synthesized to amino acids, while ammonium is directly and immediately synthesized to amino acids after its uptake. Nitrate reductase is an enzyme that catalyzes the first and rate-limiting step of nitrate assimilation, reducing nitrate to nitrite. It is a substrate-inducible enzyme, and the capacity to induce nitrate reductase varies greatly among plant species. In vivo nitrate reductase activity (NRA) is generally measured as a nitrite production rate during incubation using fine cut pieces of plant tissue, and it is applicable as an indicator on plant nitrate use. Here we present in vivo NRA of leaves from a total of 108 species including arboreal trees, small trees, shrubs, herbs, a vine and a moss. For 75 of the species, NRA in fine roots was also determined. At least 20 species in sampled plants were imported and planted for scientific or industrial purposes, but most sampled species were native to Japan. Several inventory studies of plant NRA have been conducted, mainly in Europe, and they provided information on the species-specific capacity of nitrate use by plants in Europe. However, to our best knowledge, there has been hitherto no published inventory of the NRA of plants in Japan where many endemic species are distributed. Our dataset contains plant NRA with species, family name, life form, leaf lifespan (evergreen or deciduous), growth stage, the season of sample collection, growth conditions (natural or cultivated) and other treatments/conditions when applicable. The data provided by this study may contribute to future works that require information regarding the plant species characteristics for nitrate use capacity or nitrate preference.
DOI: 10.3535/dmx-8le-f80
title: Betula nana × pendula × pubescens

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.3535/dmx-909-5kv
title: Calamagrostis purpurea (Trin.) Trin.

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.3535/dmx-a58-1pl
title: Lathyrus sylvestris L.

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.3535/dmx-g72-kdy
title: Carex demissa Hornem.

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.20783/dias.jle.39
title: Harmonized data on early stage litter decomposition using tea material across Japan

description: Litter and soil organic matter decomposition represents one of the major drivers of carbon and nutrient cycling in a given ecosystem; however, it also contributes to a significant production of relevant greenhouse gasses. The Japanese archipelago spans several biomes (boreal-temperate-subtropical) and covers a large range of elevations and ecosystem types. Hence, the comprehension of this fundamental biogeochemical process in diverse ecosystems is crucial to maintain their ecosystem services. In this article, we have provided data on plant leaf decomposition from 33 research sites across Japan. At each site, standard litter material with different decomposition rates, rooibos tea, and green tea were incubated for 90 days between 2012 and 2016 and the remaining mass was recorded. In total, 1904 bags were used. In addition, supplementary measurements of environmental variables essential for the interpretation of the collected data, such as soil and vegetation, were recorded. Plot-level averages of the remaining mass rates of bag contents after incubation ranged 0.17-0.51 for green tea and 0.54-0.82 for rooibos tea. Continued monitoring will also provide important insights into the temporal dynamics of litter decomposition.
DOI: 10.3535/dmx-h0q-0ts
title: Trifolium hybridum L.

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.3535/dmx-l1q-lfw
title: Carex extensa Gooden.

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.