Occurrence dataset from the waterbird survey of the middle and lower Huai He floodplain, China in 2005 and 2006.
此資源sampling event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 158 筆紀錄。
亦存在 1 筆延伸集的資料表。延伸集中的紀錄補充核心集中紀錄的額外資訊。 每個延伸集資料表中資料筆數顯示如下。
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。
We conducted surveys at 158 sites across 30 lakes and reservoirs in the middle and lower Huai River floodplain, Anhui and Jiangsu provinces, China.
| 界定座標範圍 |
緯度南界 經度西界 [32.2, 116.2], 緯度北界 經度東界 [33.7, 119.5] |
A total of 569 waterbird records are documented in this occurrence dataset, belonging to 44 species, 11 families and 6 orders.
| Order |
Podicipediformes,
Anseriformes,
Suliformes,
Pelecaniformes,
Charadriiformes,
Gruiformes
|
| 起始日期 / 結束日期 |
2005-12-09 / 2005-12-15 |
| 起始日期 / 結束日期 |
2006-11-27 / 2006-12-13 |
無相關描述
| 計畫名稱 |
Technology for Identifying Key Areas for Wildlife and Plant Assessment and Conservation |
| 經費來源 |
Ministry of Science and Technology of China, The National Key Research and Development Program [grant number 2022YFF1301401]. |
The waterbirds species to be counted during the survey were defined according to Waterbird Population Estimates 3rd Edition (Wetlands International 2002), which is the document used by the Ramsar Convention for identifying wetlands containing internationally important concentrations of waterbirds.
| 研究範圍 |
The area surveyed consists of the lakes and reservoirs shown within Anhui and Jiangsu Province, extending over a distance of about 200 km upstream of Hongze Hu. All the lakes visited are connected by channels or rivers to the Huai He. |
| 品質控管 |
Observers generally underestimate the numbers of waterbirds present when counting large flocks (Rappoldt et al. 1985). Underestimation is also compounded by the common problem of missing birds when counting over large wetland areas.
As very large concentrations of waterbirds were not encountered during this survey, it is believed that count accuracy (identification of species and numbers) was good. It is also believed that few birds were missed at the individual count sites.
At most lakes only part of the wetland could be surveyed and, therefore, counts for lakes are probably underestimates of numbers actually present. |
方法步驟描述:
-
The count was conducted by one team of two experienced counters each using Zeiss 10X42 Victory roof prism binoculars and Leica Televid 77 telescopes, with 20-60X zoom eyepieces.
We used geo-referenced satellite images (15m/pixel) to select count sites and entered the coordinates into GPS units. This enabled us to reach the sites with minimum problems. Sometimes we could drive directly to the sites; on other occasions we hired a local truck or walked to the site.
On all mornings we aimed to arrive at the first count site at about 07.00 when it was just light enough to see birds. We were able to survey through to about 17.30, before it got too dark to see.
The ease with which we were able to reach wetland shores varied between lakes. In some cases there were dykes or roads around the wetland that allowed good views of potential waterbird habitat to be obtained, whilst the shorelines of other wetlands were difficult to reach which seriously limited our ability to adequately cover these in the available time.