說明
As part of a research thesis, aerial imagery for the state of Indiana was examined for evidence of eastern hemlock occurrences. The distribution of Tsuga canadensis in Indiana was reviewed using aerial imagery and followed up by selected ground truthing. This dataset shows locations of less than 1000m2 (non-solid stands). Based on images from 2005, locations randomly selected were visited on foot to verify the presence of the species, through 2013.
資料紀錄
此資源出現紀錄的資料已發佈為達爾文核心集檔案（DwC-A），其以一或多組資料表構成分享生物多樣性資料的標準格式。 核心資料表包含 1,458 筆紀錄。
此 IPT 存放資料以提供資料儲存庫服務。資料與資源的詮釋資料可由「下載」單元下載。「版本」表格列出此資源的其它公開版本，以便利追蹤其隨時間的變更。
版本
以下的表格只顯示可公開存取資源的已發布版本。
如何引用
研究者應依照以下指示引用此資源。:
Hobbs, F. Collin. 2013. The biogeography and phylogeography of disjunct eastern hemlock (Tsuga canadensis) populations. Indiana University Doctoral Thesis.
權利
研究者應尊重以下權利聲明。:
此資料的發布者及權利單位為 United States Geological Survey。 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 註冊
此資源已向GBIF註冊，並指定以下之GBIF UUID: f16589a9-1c6e-4e91-b683-d5018aed4b81。 United States Geological Survey 發佈此資源，並經由GBIF-US同意向GBIF註冊成為資料發佈者。
關鍵字
Occurrence; plants; species; land cover and land use; null; Observation
聯絡資訊
- 元數據提供者 ●
- 出處 ●
- 連絡人
- 出處
地理涵蓋範圍
The distribution of all smaller plots of hemlock within the state of Indiana in the United States.
| 界定座標範圍 | 緯度南界 經度西界 [38.242, -87.301], 緯度北界 經度東界 [40.022, -85.528] |
|---|
分類群涵蓋範圍
Tsuga canadensis (L.) Carrière -- eastern hemlock
| Species | Tsuga canadensis (eastern hemlock) |
|---|
時間涵蓋範圍
| 起始日期 / 結束日期 | 2005-01-01 / 2013-01-01 |
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計畫資料
無相關描述
| 計畫名稱 | Distribution of Tsuga canadensis in Indiana - locations of less than 1000m2 |
|---|---|
| 研究區域描述 | State of Indiana, from aerial imagery and ground truthing. |
| 研究設計描述 | Aerial imagery for the state of Indiana was examined for evidence of eastern hemlock occurrences. Based on images from 2005, locations randomly selected were visited on foot to verify the presence of the species, through 2013. |
參與計畫的人員:
- 作者
取樣方法
Some localities include a name of a DNR reference coordinate, collected by Hank Huffmann around 2007 (Consists of the county followed by a unique name for the site. Ex: "Lawrence-GuthieCreek"). All sites with "basis_of_record" as "specimen" will have a herbarium sample collected by F. Collin Hobbs associated with it. The majority of Charles Deam's historic herbarium samples are housed at Indiana University. Records that could be matched up with a degree of certainty to present day stands are referenced with the corresponding catalog number. R. R. Van Stockum's 1979 dissertation includes a record of his visits to eight sites in Indiana where Tsuga canadensis was found, and are referenced where applicable.
| 研究範圍 | The study area was the entire state of Indiana, initially performed by referencing aerial imagery from 2005. The study included ground truthing visits and collecting samples from random plots through 2013. |
|---|---|
| 品質控管 | The analysis of the aerial imagery for presence/absence of eastern hemlock was followed by physical visits to sites where hemlocks were expected. |
方法步驟描述:
- visual analysis of shp files from 2005 aerial imagery determined the distribution of eastern hemlock in the state of Indiana. Field trips were taken to verify predicted presence of the trees in randomly selected areas throughout the state. Where polygons were less than 1000m2, a centroid was calculated and is represented in this dataset. A sister dataset of grids for hemlock tree distribution for polygons greater than 1000m2 is included separately.
收藏資料
| 蒐藏名稱 | Charles Deam |
|---|---|
| 蒐藏編號 | http://www.bio.indiana.edu/faculty/facilities/herbarium.shtml |
| 上層採集品識別碼 | not applicable |
| 標本保存方法 | Dried and pressed |
|---|
引用文獻
- Hobbs, F.C., Clay, K. 2015? Mapping plant distributions with multispectral aerial imagery: Tsuga canadensis as a case study. submitted.
額外的詮釋資料
| 替代的識別碼 | f16589a9-1c6e-4e91-b683-d5018aed4b81 |
|---|---|
| https://bison.usgs.gov/ipt/resource?r=indianauniv-hemlocks-under1000m2-2005-2013 |