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（New South Wales，简称NSW）的波西多尼亚海草床（Posidonia seagrass meadows）修复工作，依赖于收集冲滩海草断枝，因为从现存海草床采集供体材料是被禁止的。然而，为最大化采集效率，需明确适宜的断枝采集点位，以及哪些环境条件（如风向、风速、潮高）可提升断枝可获取量，同时确定何处能采集到健康状态最优的断枝。本数据集记录了加梅（Gamay，即植物学湾Botany Bay）内7个采样点的海草断枝丰度，该区域是澳洲波西多尼亚海草（Posidonia australis）修复的重点关注区域。本数据集旨在探究风速、风向、潮高以及浪涌（浪高、浪向）等环境要素，如何影响植物学湾全域各采样点上海草嫩枝的可获取量（以丰度表征）与健康状态（通过坏死症状观测结果判定）。本数据集的Excel数据工作簿包含两个工作表：其中"Fragments_data"工作表记录了不同采样点采集到的澳洲波西多尼亚海草断枝数量、采集时间，以及采集时的环境条件（详见数据属性章节）；"Shoot_data"工作表则记录了附着于采集断枝上的海草嫩枝的坏死比例。