Swedish National Forest Inventory: Presence-absence vegetation data (1995-2017, discontinued sample)

データ レコード

この sampling event リソース内のデータは、1 つまたは複数のデータ テーブルとして生物多様性データを共有するための標準化された形式であるダーウィン コア アーカイブ (DwC-A) として公開されています。 コア データ テーブルには、26,102 レコードが含まれています。

拡張データ テーブルは2 件存在しています。拡張レコードは、コアのレコードについての追加情報を提供するものです。 各拡張データ テーブル内のレコード数を以下に示します。

この IPT はデータをアーカイブし、データ リポジトリとして機能します。データとリソースのメタデータは、 ダウンロード セクションからダウンロードできます。 バージョン テーブルから公開可能な他のバージョンを閲覧でき、リソースに加えられた変更を知ることができます。

バージョン

次の表は、公にアクセス可能な公開バージョンのリソースのみ表示しています。

権利

研究者は権利に関する下記ステートメントを尊重する必要があります。:

パブリッシャーとライセンス保持者権利者は Swedish National Forest Inventory, Department of Forest Resource Management, SLU。 To the extent possible under law, the publisher has waived all rights to these data and has dedicated them to the Public Domain (CC0 1.0). Users may copy, modify, distribute and use the work, including for commercial purposes, without restriction.

GBIF登録

このリソースをはGBIF と登録されており GBIF UUID: e1a32bea-73df-4b9b-af2e-6e148ab2641bが割り当てられています。   GBIF Sweden によって承認されたデータ パブリッシャーとして GBIF に登録されているSwedish National Forest Inventory, Department of Forest Resource Management, SLU が、このリソースをパブリッシュしました。

キーワード

sampling event; forest land; mires; rock surface; subalpine woodland; pasture land; alpine areas; survey; standardised inventory; forest statistics; stratified sampling; presence; absence; field layer; bottom layer; coverage; Samplingevent

連絡先

地理的範囲

Data is collected across the whole of Sweden.

生物分類学的範囲

Approximately 240 species or species groups of vascular plants, lichen and mosses occurring in the Swedish landscape.

時間的範囲

プロジェクトデータ

The Swedish National Forest Inventory has the task of describing the state and changes in Sweden's forests. The information collected is used, for example, as a basis for forestry, energy and environmental policy in Sweden. Data from the Swedish National Forest Inventory is part of Sweden's official statistics. At the heart of the Swedish National Forest Inventory is the annual inventory which is undertaken by ca 50 field workers during the snow free period. Every year an inventory is carried out on ca 12 000 sample plots with measurements collected from ca 95 000 trees and a large range of other variables describing the stand, site and history of the sample plot.

プロジェクトに携わる要員:

収集方法

The Swedish National Forest Inventory sample plots are circular and are, for practical reasons, grouped into clusters (tracts). The tracts are square or rectangular in shape and are of different dimensions in different parts of the country. The density of tracts and the number of sample plots per tract also varies among different parts of the country, with a higher sample density in southern Sweden. Two thirds of the sample consist of permanent tracts and one third are temporary tracts. Sampling is done annually for a subsample of tracts. The permanent tracts are revisited every 5th year and the temporary tracts are only visited once. The true coordinates of the permanent sample plots are protected. The coordinates in this dataset are generalized (randomly obfuscated with 200-1000 m). Vegetation survey on permanent field plots: This dataset consists of presence/absence data for 242 species/species groups (18 ground layer species, 187 field layer species and 37 tree/shrub layer species). Registration of coverage is performed in a separate inventory for 71 species/species groups including “no coverage” (this data is not included in this dataset). The vegetation inventory is undertaken every 10th year on permanent plots. The plot can be divided into smaller parts if it’s crossed by edges between different types of land use classes or forest stand categories. The sample population for presence/absence registration is all forest land (landuse classes Productive forest land, Mires, Rock surface, Subalpine woodland, Pasture land and, since year 2016, Alpine areas). The sample size (number of permanent sample plots where presence/absence registrations are performed) was reduced by 50% from year 2018 and onwards. This dataset consists of the reduced sample. The supplement data from the discontinued sample for the period 1995-2017 is available in the related dataset 'Swedish National Forest Inventory: Presence-absence vegetation data (1995-2017, supplement sample)'. Descriptions of the survey scheme can be found on https://www.slu.se/centrumbildningar-och-projekt/riksskogstaxeringen/om-riksskogstaxeringen/om-inventeringen/ (detailed information available in Swedish only).

Method step description:

1. Sample plots are visited by qualified field personal who survey a number of forest parameters and sample vegetation by recording presence/absence for a specified list of species of vascular plants, mosses and lichens. Species that were detected are recorded as present, species that were not detected are recorded as 'absent'. Coverage is record for a subset of the species. The circular samling plot (radius=5.64 m) can be divided into smaller parts if it is crossed by edges between different types of land use classes or forest stand categories. The sample population for presence/absence registration is all forest land (landuse classes Productive forest land, Mires, Rock surface, Subalpine woodland, Pasture land and, since year 2016, Alpine areas).

コレクションデータ

書誌情報の引用

1. Fridman J., Holm S., Nilsson M., Nilsson P., Ringvall A. H., Ståhl G. (2014). Adapting National Forest Inventories to changing requirements the case of the Swedish National Forest Inventory at the turn of the 20th century. Silva Fennica vol. 48 no. 3 article id 1095. http://dx.doi.org/10.14214/sf.1095

追加のメタデータ