DOI: 10.5281/zenodo.6541258
title: Data from: Historic deforestation and non-native plant invasions determine vegetation trajectories across an oceanic archipelago
title: 論文タイトル「森林伐採と外来植物の侵入の履歴が海洋島の植生変化を規定する」関連データセット

description: This archive contains data produced in a study of the vegetation trajectories of Ogasawara Islands in 77 years related to following article:

Ohashi, H., Kato, H., Murao, M., Kato, H., Kawakami, K., Kurokawa, H., Oguro, M., Kimura, F., Niiyama, K., Matsui, T., and Shibata, M. (2024) Historic deforestation and non-native plant invasions determine vegetation trajectories across an oceanic archipelago. Applied Vegetation Science, 27 (1), e12767. https://doi.org/10.1111/avsc.12767

 

Archive contentsThe archive contents are organized into five parts, each stored as a .zip compressed file.

X1_tif_original_vegmap_scan_georeference

Scanned and georeferenced original vegetation maps in GeoTiff format, which was drawn in 1935, scanned at 300 dpi. Coordinate reference system was set at WGS84 (ESPG: 4326).

This directory includes:

kitanoshima_isl_WGS84.tifmukojima_isl_WGS84.tifyomejima_isl_WGS84.tifototojima_isl_WGS84.tifanijima_isl_WGS84.tifnishijima_isl_WGS84.tifchichijima_isl_WGS84.tifhahajima_isl_WGS84.tifmukohjima_isl_WGS84.tifkitaiwoto_isl_WGS84.tifiwoto_isl_WGS84.tif

 

X2_shp_vegmap

Shapefile of the geospatial polygon data of vegetation map of Ogasawara Islands surveyed in 1935, and stored as a .zip compressed file. Coordinate reference system was set at WGS84 (ESPG: 4326).

This directory includes:

VegetationMap_OgasaawraIsl_1935_en_UTF8_v0.dbfVegetationMap_OgasaawraIsl_1935_en_UTF8_v0.prjVegetationMap_OgasaawraIsl_1935_en_UTF8_v0.shpVegetationMap_OgasaawraIsl_1935_en_UTF8_v0.shxattribute_ForSect_code_en.csvattribute_Veg_name_en.csvmetadata_vegmap_shp_ogasawara1935_en.csv

Following files includes Japanese character (which may corrupt in non-Japanese environment):

attribute_ForSect_jp.csvattribute_Veg_name_jp.csvmetadata_vegmap_shp_ogasawara1935_jp.csv

 

X3_tif_vegmap_converted_from_shp

Rasterized data of polygon data of vegetation map for analysis. Coordinate reference system was set at JGD2000 / Japan Plane Rectangular CS XIV (EPSG: 2456)

This directory includes:

vegmap_1935.zip (compressed “vegmap_1935.tif (0.7GB)”)vegnap_1979.zip (compressed “vegmap_1979.tif (1.5GB)”)vegmap_2011.zip (compressed “vegmap_2011.tif (1.5GB)”)islcode_raster.zip (compressed “vegmap_2011.tif (1.5GB)”)attribute_integratedveg_ecoltype.csvattribute_vegid_1935.csvattribute_vegid_1979.csvattribute_vegid_2011.csv

 

X4_scanned_image_vegdata

Scanned images of original vegetation data in 1935.

The directory includes:vegetation_survey_sheet_1.pdfvegetation_survey_sheet_2.pdfvegetation_survey_sheet_3.pdf

 

X5_digitized_vegdata

Digitized vegetation data.

The directory includes:plot_species_abundance_matrix_v0.csvplotinfo_v0.csvattribute_Species_en_v0.csv

Following file includes Japanese character (which may corrupt in non-Japanese environment)attribute_Species_jp_v0.csv 

X6_code_for_analysis

Tentative.

 

このアーカイブには、小笠原諸島の77年間の植生の変遷(1935年、1979年、2012年)に関するデータが含まれています。

 
description: This research was partly funded by the "Support program of FFPRI for researchers having family obligations", JSPS KAKENHI (JP20H04380), "Subsidized project of Forestry Agency for technological development for conservation of world heritage forest ecosystem in FY2021: development of forest restoration techniques using native trees in the Ogasawara Islands via collection of scientific knowledge". 
description: 本研究は、ダイバーシティ推進費、科研費(JP20H04380)、林野庁補助事業「令和3年度世界遺産の森林生態系保全対策事業 森林生態系保全のための技術開発・科学的知見の収集 小笠原諸島における在来樹木による森林の修復手法の開発」により実施した成果である。
description: Questions: Oceanic islands are global hotspots of endemism and evolutionary radiations but many have been severely degraded by human activities and biological invasions. We evaluated the pace and direction of natural recovery of ecosystems over 77 years across a subtropical oceanic archipelago including islands of various size, elevation, histories of human settlement and deforestation, and invasions by non-native plants and mammals. This information is essential to guide ecological restoration of the archipelago.Location: Forest vegetation on nine of the Ogasawara Islands in the northwestern Pacific Ocean.Methods: We first digitized historical vegetation data of the Ogasawara Islands collected during field surveys in 1935. Then, after checking their species compositions, we integrated past and present plant community types. Finally, we identified the landscape-scale changes in forest vegetation by comparing vegetation maps from 1935, 1979, and 2012.Results: Over 77 years, the vegetation trajectories of each island varied depending on the introduction of invasive alien species and the remaining proportion of native forest, the latter of which had a strong influence on the recoverability of native forest.Conclusions: Our results highlight the importance of the history of invasive species introductions and the remaining proportion of native forest—both of which reflect the intensity of anthropogenic disturbance—in determining the degree of human intervention needed for restoration on oceanic islands.