A Synthesis of Blue Carbon Stocks, Sources, and Accumulation Rates in Eelgrass ( Zostera marina ) Meadows in the Northeast Pacific
A Synthesis of Blue Carbon Stocks, Sources, and Accumulation Rates in Eelgrass ( Zostera marina ) Meadows in the Northeast Pacific
复制标题
东北太平洋大叶藻（Zostera marina）草甸蓝碳库、来源和积累率综合
DOI：
10.1029/2019gb006345
复制
发表时间：
2020
影响因子：
5.2
通讯作者：
Apple, J.
中科院分区：
文献类型：
--
作者：
Prentice, C.;Poppe, K. L.;Lutz, M.;Murray, E.;Stephens, T. A.;Spooner, A.;Hessing‐Lewis, M.;Sanders‐Smith, R.;Rybczyk, J. M.;Apple, J.
越来越迫切需要执行减缓气候变化的战略，以加强从大气中清除温室气体和减少二氧化碳排放。最近，沿海的“蓝碳”栖息地-红树林，盐沼，海草草甸-已受到关注，他们的能力，捕获二氧化碳和存储有机碳（OC），主要是在其沉积物。然而，在不同的生境类型和地区，有关当地沉积物的固碳率和碳来源的信息仍然很少。在这里，我们汇编了最近获得的估计沉积物有机碳储量和封存率从139个核心从温带海草（大叶藻滨海）草甸在阿拉斯加，不列颠哥伦比亚省，华盛顿，和俄勒冈州。所有柱状样沉积物中有机碳含量平均为0.75%。沉积物顶部25厘米和1米处的有机碳储量平均值分别为1，846和7，168 g OC m−2。固碳率为4.6至93.0 g OC m− 2 yr − 1，平均为24.8 g OC m− 2 yr −1。该地区的同位素数据表明，沉积物中的有机碳主要来自非鳗草。一般来说，这些值与其他temperateZ的值相当。海草的平均值比全球海草的平均值低得多，但大大低于以前报告的全球海草的平均值。这些结果进一步强调了对蓝碳参数进行局部和物种水平量化的必要性。虽然温带的海草草甸可能不会像其他地方的海草草甸那样固碳和储存那么多的碳，但仍应实施气候政策激励措施，以保护现有的沉积物碳储量和与海草栖息地相关的其他关键生态系统服务。
There is increasing urgency to implement climate change mitigation strategies that enhance greenhouse gas removal from the atmosphere and reduce carbon dioxide (CO2) emissions. Recently, coastal “blue carbon” habitats—mangroves, salt marshes, and seagrass meadows—have received attention for their ability to capture CO2and store organic carbon (OC), primarily in their sediments. Across habitat types and regions, however, information about the sequestration rates and sources of carbon to local sediments remains sparse. Here we compiled recently obtained estimates of sediment OC stocks and sequestration rates from 139 cores collected from temperate seagrass (Zostera marina) meadows in Alaska, British Columbia, Washington, and Oregon. Across all cores sediment OC content averaged 0.75%. Organic carbon stocks in the top 25 cm and 1 m of the sediment averaged 1,846 and 7,168 g OC m−2, respectively. Carbon sequestration rates ranged from 4.6 to 93.0 g OC m−2yr−1and averaged 24.8 g OC m−2yr−1. Isotopic data from this region suggest that OC in the sediments is largely from noneelgrass sources. In general, these values are comparable to those from other temperateZ. marinameadows, but significantly lower than previously reported values for seagrasses globally. These results further highlight the need for local and species‐level quantification of blue carbon parameters. While temperate eelgrass meadows may not sequester and store as much carbon as seagrass meadows elsewhere, climate policy incentives should still be implemented to protect existing sediment carbon stocks and the other critical ecosystem services associated with eelgrass habitats.