How Well Do Restored Intertidal Oyster Reefs Support Key Biogeochemical Properties in a Coastal Lagoon?
How Well Do Restored Intertidal Oyster Reefs Support Key Biogeochemical Properties in a Coastal Lagoon?
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DOI：
10.1007/s12237-017-0311-5
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发表时间：
2018-05-01
影响因子：
2.7
通讯作者：
Walters, Linda J.
中科院分区：
文献类型：
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作者：
Chambers, Lisa G.;Gaspar, Stephanie A.;Walters, Linda J.
在世界范围内，越来越多的人致力于恢复死亡/退化的牡蛎礁，以重建可收获的种群或更新生态系统服务。有证据表明，牡蛎可以改善水质，但对相关底栖沉积物在促进生物地球化学过程（如养分循环和埋藏）中的作用知之甚少。对于一个地点是否像天然珊瑚礁一样运作，或者在储存后多久，人们的理解也很有限。研究了死礁沉积物的主要生物地球化学性质（如理化性质、营养池、微生物群落规模和活性）；1年、4年和7年的修复珊瑚礁；蚊子泻湖（佛罗里达州，美国）东部牡蛎的天然参考礁。结果表明，相对于死礁，生物地球化学性质(溶解有机碳(C)、NH4（+）、总C、总氮（N)以及参与C、N、磷(P)循环的主要胞外酶活性）在贮藏1年后显著增加，并随着年龄的增长基本保持不变。不同年龄（1 ~ 7年）的生物地球化学特征与自然参考礁的差异不大。同一处理类别的珊瑚礁之间的差异通常与活牡蛎数量、珊瑚礁厚度和/或沉积物中C和N的可用性的差异有关。总体而言，本研究证明了潮间带牡蛎礁作为营养循环和埋藏的生物地球化学热点的作用，以及成功恢复后生物地球化学特性可以快速（1年内）重建。
The restoration of dead/degraded oyster reefs is increasingly pursued worldwide to reestablish harvestable populations or renew ecosystem services. Evidence suggests that oysters can improve water quality, but less is known about the role of associated benthic sediments in promoting biogeochemical processes, such as nutrient cycling and burial. There is also limited understanding of if, or how long postrestoration, a site functions like a natural reef. This study investigated key biogeochemical properties (e.g., physiochemical properties, nutrient pools, microbial community size and activity) in the sediments of dead reefs; 1-, 4-, and 7-year-old restored reefs; and natural reference reefs of the eastern oyster, Crassostrea virginica, in Mosquito Lagoon (FL, USA). Results indicated that most of the measured biogeochemical properties (dissolved organic carbon (C), NH4 (+), total C, total nitrogen (N), and the activity of major extracellular enzymes involved in C, N, and phosphorus (P) cycling) increased significantly by 1-year postrestoration, relative to dead reefs, and then remained fairly constant as the reefs continued to age. Few differences were observed in biogeochemical properties between restored reefs of any age (1 to 7 years) and natural reference reefs. Variability among reefs of the same treatment category was often correlated with differences in the number of live oysters, reef thickness, and/or the availability of C and N in the sediments. Overall, this study demonstrates the role of live intertidal oyster reefs as biogeochemical hot spots for nutrient cycling and burial and the rapidity (within 1 year) with which biogeochemical properties can be reestablished following successful restoration.