Pathways of blue carbon export from kelp and seagrass beds along the Atlantic coast of Nova Scotia

Coastal vegetated ecosystems are recognized for their role in cycling and storing carbon in the world’s oceans (i.e., blue carbon); however, high uncertainty in carbon sequestration rates are driven in part by an absence of studies directly estimating carbon export to the deep sea. We modeled export from nearshore kelp forests and seagrass beds, showing that export varies by orders of magnitude across spatial scales (5 – 100s km), kelp and seagrass species, seasons, and forms of carbon, raising caution in using generalized export rates in blue carbon accounting. Our results are also the first to show rapid (within 20-30 days) and extensive export of neutrally buoyant dissolved organic carbon to the shelf break (up to 44% within 90 days), contrasting sinking particulate organic carbon particles that remained within 100 m water depth in the near shore. These results improve estimates of carbon sequestration by nearshore vegetated ecosystems and reveal contrasting patterns of export relati..., , # Pathways of blue carbon export from kelp and seagrass beds along the Atlantic coast of Nova Scotia Dataset DOI: [10.5061/dryad.wpzgmsc0w](10.5061/dryad.wpzgmsc0w) ## Description of the data and file structure Files are particle positions during dispersal from Lagrangian Particle Track Modelling of carbon particles released from kelp forests and seagrass beds on the Atlantic Coast of Nova Scotia, Canada. ### Files and variables #### File: Krumhansl\_etal\_POC\_simulation\_outputs\_code.zip **Description:** Simulation outputs from modeling experiments of kelp and seagrass particulate organic carbon (POC) dispersal. #### File: Krumhansl\_etal\_DOC\_sumulation\_outputs\_code.zip **Description:** Simulation outputs from modelling experiments of kelp and seagrass dissolved organic carbon (DOC) dispersal ##### File naming convention and data description * Names of files show Genus_species_carbontype_subregion_season_duration_variable.txt Genus_species: Kelps: Laminaria digitata,...,滨海植被生态系统因其在全球海洋中循环与储存碳（即蓝碳（blue carbon））的核心功能而备受学界认可；然而，碳固存速率存在显著不确定性，其诱因之一是缺乏直接估算碳向深海输出量的相关研究。本研究对近岸海带林与海草床的碳输出过程开展建模，结果显示：碳输出量在空间尺度（5至数百公里）、物种（海带与海草）、季节以及碳形态等多个维度上相差数个数量级，这警示在蓝碳核算中不可直接套用通用的碳输出速率。本研究同时首次揭示：中性浮力溶解有机碳（dissolved organic carbon, DOC）可在20至30天内快速且大范围地向陆架坡折处输出（90天内累计输出占比可达44%）；而沉降型颗粒有机碳（particulate organic carbon, POC）颗粒则仅停留在近岸100米水深范围内。上述结果优化了近岸植被生态系统的碳固存估算精度，并揭示了截然不同的碳输出模式……，本研究主题为《加拿大新斯科舍省大西洋沿岸海带与海草床的蓝碳输出路径》。 数据集DOI：[10.5061/dryad.wpzgmsc0w](10.5061/dryad.wpzgmsc0w) ## 数据与文件结构说明 本数据集包含通过拉格朗日粒子追踪模型（Lagrangian Particle Track Modelling）模拟得到的、从加拿大新斯科舍省大西洋沿岸海带林和海草床释放的碳粒子的扩散轨迹位置数据。 ### 文件与变量 #### 文件：Krumhansl_etal_POC_simulation_outputs_code.zip **描述**：海带与海草颗粒有机碳（POC）扩散模拟实验的输出结果与配套代码。 #### 文件：Krumhansl_etal_DOC_simulation_outputs_code.zip **描述**：海带与海草溶解有机碳（DOC）扩散模拟实验的输出结果与配套代码。 ##### 文件命名规则与数据说明 * 文件命名格式为：`属_物种_碳类型_子区域_季节_时长_变量.txt` 其中**属_物种**项涵盖海带类物种，例如掌状海带（Laminaria digitata）等……