The greenhouse gas offset potential from seagrass restoration

The greenhouse gas offset potential from seagrass restoration
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海草恢复的温室气体抵消潜力

DOI:
10.1038/s41598-020-64094-1
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发表时间:
2020
期刊:
影响因子:
4.6
通讯作者:
Mullins, Lindsay
Mullins, Lindsay
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Oreska, Matthew P.;McGlathery, Karen J.;Aoki, Lillian R.;Berger, Amélie C.;Berg, Peter;Mullins, Lindsay

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授予二氧化碳补偿额度可能会激励海草恢复项目,并有助于扭转全球海草损失造成的温室气体(GHG)排放。然而,没有一项研究对海草恢复项目从大气中的温室气体净清除量进行量化,这将需要联合进行Corgstock和温室气体通量增强测量,或确定可归功的抵消收益是否可以为恢复提供资金。我们测量了美国弗吉尼亚州7公里长的草甸中所有必要的温室气体核算参数,这是迄今为止最大、最具成本效益的草甸恢复的一部分,以提供第一个海草补偿财务概念测试。经过15年的恢复,海草从大气中去除了9600 tCO2,但也增加了CH4和N2O的产生,释放了950 tCO2e。尽管N2O通量增加了两倍,达到0.06 g m−2yr−1,CH48倍增加到0.8 g m−2yr−1,但草甸现在抵消了0.42tCO2e ha−1yr−1,这大致相当于考虑温室气体清单的海草固定速率,但低于温带和热带森林的速率。这个非常成功的项目的经济收益为87美元 K,按10MtCO2e−1计算,支付了修复成本的约10%。管理者还应考虑海草的共同利益,这为海草的恢复提供了额外的激励。
Awarding CO2offset credits may incentivize seagrass restoration projects and help reverse greenhouse gas (GHG) emissions from global seagrass loss. However, no study has quantified net GHG removal from the atmosphere from a seagrass restoration project, which would require coupled Corgstock and GHG flux enhancement measurements, or determined whether the creditable offset benefit can finance the restoration. We measured all of the necessary GHG accounting parameters in the 7-km2Zostera marina(eelgrass) meadow in Virginia, U.S.A., part of the largest, most cost-effective meadow restoration to date, to provide the first seagrass offset finance test-of-concept. Restoring seagrass removed 9,600 tCO2from the atmosphere over 15 years but also enhanced both CH4and N2O production, releasing 950 tCO2e. Despite tripling the N2O flux to 0.06 g m−2yr−1and increasing CH48-fold to 0.8 g m−2yr−1, the meadow now offsets 0.42 tCO2e ha−1yr−1, which is roughly equivalent to the seagrass sequestration rate for GHG inventory accounting but lower than the rates for temperate and tropical forests. The financial benefit for this highly successful project, $87 K at $10 MtCO2e−1, defrays ~10% of the restoration cost. Managers should also consider seagrass co-benefits, which provide additional incentives for seagrass restoration.
通过涡流相关测量沿着大叶藻(Zostera marina)定植梯度的生态系统代谢
DOI: --
发表时间: 2014
期刊:
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DOI: --
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发表时间: 2012
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影响因子: 4.9
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