Locations and health of beachcast fragments of Posidonia in Botany Bay (NESP MaC 1.8)

Efforts to restore Posidonia seagrass meadows in NSW are reliant on collecting beachcast fragments as collection of donor material from extant beds is prohibited. However, to maximise the collection efforts it necessary to understand where to collect fragments from and what environmental conditions (e.g. wind direction, wind strength, tidal height) increase the availability of fragments and where to collect the most healthy fragments. This data set captures the abundance of fragments at 7 sites in Gamay (Botany Bay), an area of interest for restoration of Posidonia australis. It investigates how characteristics of wind (speed and direction), tidal height and swell (height, direction) influence the availability (abundance) and health (as determined by observations of necrosis) of shoots at sites throughout Botany Bay.The Excel data workbook is comprised of two sheets:Fragments_data sheet shows the number of P. australis fragments collected at different sites, when they were collected, and the environmental conditions at collection (see data attributes section).Shoot_data sheet shows the proportion of necrosis of shoots attached to collected fragments.

新南威尔士州（NSW）的波西多尼亚海草床修复工作，依赖于采集冲滩海草片段，因禁止从现存海草床获取供体材料。然而，为最大化采集效率，需明确两项核心问题：一是应从何处采集海草片段，二是哪些环境条件（如风向、风速、潮汐高度）可提升海草片段的可获得性，以及何处能采集到健康状态最佳的海草片段。

本数据集记录了盖迈（Gamay，即植物学湾（Botany Bay））7个采样点的海草片段丰度，该区域是澳洲波西多尼亚海草（Posidonia australis）修复工程的重点关注区域。本研究探讨了风速、风向、潮汐高度以及浪高、浪向等环境特征，如何影响植物学湾各采样点内海草片段的可获得性（以片段丰度衡量）与海草梢的健康程度（通过坏死（necrosis）组织观测结果判定）。

本Excel数据工作簿包含两个工作表：
1. Fragments_data 工作表：记录了不同采样点的澳洲波西多尼亚海草片段采集数量、采集时间，以及采集时的环境条件（详见数据属性章节）。
2. Shoot_data 工作表：记录了附着于采集片段上的海草梢的坏死比例。