底层贝类蛤蜊和悬浮贻贝养殖过程中的季节性氮磷动态。
Seasonal nitrogen and phosphorus dynamics during benthic clam and suspended mussel cultivation.
机构信息
Department of Environmental Sciences, Parma University, Parco Area delle Scienze 33/A, 43100 Parma, Italy.
出版信息
Mar Pollut Bull. 2011 Jun;62(6):1276-87. doi: 10.1016/j.marpolbul.2011.03.009. Epub 2011 Mar 30.
Effects of suspended mussel and infaunal clam cultivation on sediment characteristics, and benthic organic and inorganic nitrogen and phosphorus fluxes were compared in a shallow coastal lagoon. The two species had different impacts on sediment features, but both created "hotspots" of nutrient fluxes with annual N and P regeneration rates being 4.9 and 13.5 (mussel) and 4.5 and 14.9 (clams) fold greater than those of unfarmed control sediments. Mussel farming also caused considerable nutrient regeneration within the water column with the mussel ropes contributing ∼25% of total inorganic N and P production and at times dominating the sediments (e.g. 95% of SRP production in summer and 45% of DIN production in winter). Such nutrient regeneration rates seriously question the proposal that suspension-feeding bivalves act as a eutrophication buffer, especially during summer when nutrient regeneration rates are maximal, but other nutrient sources (freshwater run-off and unfarmed sediments) are at their lowest.
在一个浅沿海泻湖，比较了悬浮贻贝和底栖蛤养殖对沉积物特征以及底栖有机氮和无机氮磷通量的影响。这两个物种对沉积物特征有不同的影响，但都形成了“热点”的营养通量，年氮和磷的再生率分别为 4.9 和 13.5（贻贝）和 4.5 和 14.9（蛤）倍，比未养殖对照沉积物高。贻贝养殖也导致水柱内有相当大的养分再生，贻贝绳贡献了约 25%的总无机氮和磷的产生，有时也会主宰沉积物（例如，夏季 SRP 产量的 95%和冬季 DIN 产量的 45%）。这种养分再生率严重质疑滤食性双壳类动物作为富营养化缓冲的观点，尤其是在夏季养分再生率最高的时候，但其他养分来源（淡水径流和未养殖沉积物）却处于最低水平。
Zotero 插件