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資料紀錄
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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。:
Floyd K, Myer B (2026). Tristan da Cunha: Alien Plant Observations 2023 and 2025. Version 1.6. Kaitiaki o te Ngahere. Occurrence dataset. https://ipt.gbif.org.nz/resource?r=tristan_observations&v=1.6
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 Kaitiaki o te Ngahere。 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: b870725b-d0da-4dd4-9ca4-20bebb62c4d7。 Kaitiaki o te Ngahere 發佈此資源，並經由GBIF New Zealand同意向GBIF註冊成為資料發佈者。
關鍵字
Occurrence; Tristan da Cunha; alien; invasive; plants; Observation
聯絡資訊
- 出處 ●
- 連絡人
- 連絡人
地理涵蓋範圍
Tristan da Cunha
| 界定座標範圍 | 緯度南界 經度西界 [-37.095, -12.334], 緯度北界 經度東界 [-37.064, -12.281] |
|---|
分類群涵蓋範圍
Alien vascular plants from Tristan da Cunha
| Kingdom | Plantae |
|---|---|
| Phylum | Streptophyta |
| Class | Pinopsida, Magnoliopsida, Liliopsida |
| Order | Dipsacales, Geraniales, Cucurbitales, Asterales, Arecales, Ericales, Solanales, Alismatales, Poales, Malpighiales, Asparagales, Myrtales, Zingiberales, Lamiales, Caryophyllales, Rosales, Fabales, Saxifragales, Commelinales, Brassicales, Gentianales, Cornales, Pinales, Apiales |
| Family | Commelinaceae, Corynocarpaceae, Lamiaceae, Araliaceae, Pittosporaceae, Myrtaceae, Cannaceae, Rosaceae, Amaryllidaceae, Arecaceae, Solanaceae, Caryophyllaceae, Pinaceae, Iridaceae, Araceae, Polygonaceae, Onagraceae, Poaceae, Geraniaceae, Rubiaceae, Brassicaceae, Juncaceae, Fabaceae, Crassulaceae, Urticaceae, Caprifoliaceae, Asphodelaceae, Moraceae, Hydrangeaceae, Convolvulaceae, Primulaceae, Asteraceae, Salicaceae |
計畫資料
Tristan da Cunha is the most remote inhabited island in the world. The community has a long history here, and the Settlement Plain has been transformed from a natural landscape into a productive area. The island’s steep and mountainous geography has limited broader landscape development. Tristan da Cunha hence supports significant populations of globally threatened birds and plants. Tristan da Cunha's unique biodiversity is of global importance due to its high levels of endemism. The island group’s flora includes roughly 50 native flowering plants and 35 native ferns, with nearly half of these vascular plants being endemic. The territory is also globally significant for its avifauna, supporting 86 native bird species, including 11 endemic species such as the Tristan Thrush. The ecosystem types are vertically zoned by elevation, ranging from coastal areas – where the original tussock grassland communities have largely been lost due to grazing – to Phylica arborea woodland and fernbush, to high-altitude mire and feldmark vegetation. A total of 170 non-native plant species have been recorded on Tristan da Cunha. While a small number of additional introduced species occur on the other islands in the archipelago, the primary source of plant introductions is Cape Town, South Africa, from which the majority of shipping originates. Weeds pose a serious threat to biodiversity by disrupting ecosystem processes and outcompeting native species. Once established, many invasive plants produce large quantities of long-lived seeds, making eradication challenging. Successful weed management depends on accuracy, persistence, and timing. A clear management strategy ensures stakeholders understand their roles, are adequately resourced, and can act effectively, thereby safeguarding both ecological integrity and prior conservation investments. Proactive management remains the most effective and cost-efficient approach for protecting biodiversity and achieving long-term conservation outcomes.
| 計畫名稱 | Building Capacity for Invasive Plant Management across Tristan’s Northern Islands |
|---|---|
| 辨識碼 | DPLUS191 |
| 經費來源 | This project is generously supported by Darwin Plus. DPLUS191 is a main sized project. https://darwinplus.org.uk/project/DPLUS191 |
| 研究區域描述 | The Tristan archipelago is one of the remotest in the world, home to 95+ unique species which have evolved in isolation. With the transport of people and goods across the globe, many plant species have been introduced into novel areas, with devastating and far-reaching consequences for the native biodiversity. |
| 研究設計描述 | Introduced species recorded on Tristan da Cunha were identified during November and December 2025 across the Settlement, the Pigbite, the 1961 lava flow, and the Potato Patches. Figure 2 illustrates the spatial distribution of survey and control efforts across the island. Due to time constraints and the limited accessibility of certain areas, it was not possible to locate and identify all species previously recorded by Gremmen and Halbertsma (2009) and Floyd (2023). In some cases, species recorded during earlier surveys may also have declined, been successfully removed, or persist at very low abundance, and were therefore not detected during the present assessment. |
| Project Award |
Enabling invasive plant eradications and long-term management in Tristan Darwin Plus (main) DPLUS191 https://darwinplus.org.uk/project/DPLUS191 |
參與計畫的人員:
- 程式設計師
取樣方法
An extensive survey was conducted by Gremmen and Halbertsma, in 2007 - 2008. They spent 4 months on the island and identified 137 alien vascular plant species and documented the threats they pose to the island’s unique endemic biodiversity and agricultural production. Kelvin Floyd and Bradley Myer visited the island in 2023 and 2025 respectively. Their focus was re assessing the highest priority species based on the ecological impact of the alien invasive species. Alien species are primarily focused around the settlement of Edinburgh of the Seven Seas.
| 研究範圍 | Botanical documentation on Tristan da Cunha began in 1793, when Aubert du Petit-Thouars collected three plant species. By 1910, 44 alien plant species had been recorded. A major botanical survey was undertaken during the 1937–38 Norwegian Scientific Expedition by Christophersen and Mejland. Further extensive collections were made by Stableford in the 1950s, followed by Wace and Dickson. Knowledge of the flora was later consolidated by Groves (1981). A comprehensive study by Gremmen and Halbertsma in 2009 mapped 137 introduced plant species across the island. Currently, invasive plant management is being conducted under the Darwin Plus initiative (DPLUS191) through the Building Capacity for Invasive Plant Management across Tristan’s Northern Islands project. As part of this initiative, representatives from Indigena Biosecurity International visited the island in 2023 and 2025, documenting weed species and geolocating their distribution. |
|---|---|
| 品質控管 | In 2023 and 2025 data was selected from dropdown lists, which included the species list from Gremmen and Halbertsma, in 2007 - 2008. There were fields for including adventive species. Plantnet was used to verify unknown species. |
方法步驟描述:
- Data was recorded in the field then synced to the cloud and then aggregated with the other datasets.
額外的詮釋資料
Indigena Biosecurity International - www.indigena.co.nz
| 致謝 | |
|---|---|
| Introduction | |
| Getting Started | |
| 目的 | |
| 替代的識別碼 | b870725b-d0da-4dd4-9ca4-20bebb62c4d7 |
| https://ipt.gbif.org.nz/resource?r=tristan_observations |