Impact of nitrogen (N) and phosphorus (P) enrichment and skewed N:P stoichiometry on the skeletal formation and microstructure of symbiotic reef corals.
Impact of nitrogen (N) and phosphorus (P) enrichment and skewed N:P stoichiometry on the skeletal formation and microstructure of symbiotic reef corals.
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DOI：
10.1007/s00338-022-02223-0
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发表时间：
2022
期刊：
影响因子：
3.5
通讯作者：
Wiedenmann, J.
中科院分区：
文献类型：
--
作者：
Buckingham, M. C.;D'Angelo, C.;Chalk, T. B.;Foster, G. L.;Johnson, K. G.;Connelly, Z.;Olla, C.;Saeed, M.;Wiedenmann, J.
据报道，珊瑚生长和骨骼微结构对营养环境的不同反应使珊瑚礁水质的基于知识的管理复杂化。通过重新评估已发表的结果，考虑到研究珊瑚的分类和营养环境的N：P化学计量学，我们可以解决一些明显的主要矛盾。我们的分析表明，顶孢菌科的行为不同于其他几个常见的属，并对特定的营养处理显示出不同的反应。我们假设水中溶解的无机氮和磷的浓度及其化学计量比形状、骨骼生长和微结构。我们用四种营养处理对 >； 进行了10周的试验，验证了这一假说：高硝酸盐/高磷酸盐、高硝酸盐/低磷酸盐、低硝酸盐/高磷酸盐和低硝酸盐/低磷酸盐。HNHP珊瑚保持了较高的虫黄藻密度，其线性伸展和钙化率比其他处理高出10倍以上。HNLP和LNLP珊瑚由于共生体的丧失而漂白。HNLP珊瑚中残留共生体的光化学效率(Fv/Fm)显著降低，表明存在磷饥饿。骨骼微结构的微电子计算机断层扫描(µCT)显示，在营养有限或营养匮乏的条件下(HNLP、LNHP、LNLP)，线性伸长减少与骨骼元素显著增厚和孔隙度减少相关。这些变化可以用线状延长率的强烈降低和钙化率的较小降低来解释。使用增加的骨骼密度作为过去热漂白事件的替代品的研究应该考虑，这种密度的增加也可能与对营养环境的温度无关的反应有关。此外，在分析和管理营养污染的影响时，应考虑珊瑚和海水N：P化学计量学的分类。网上版载有补充材料，可在10.1007/s00338-022-02223-0查阅。
Reported divergent responses of coral growth and skeletal microstructure to the nutrient environment complicate knowledge-based management of water quality in coral reefs. By re-evaluating published results considering the taxonomy of the studied corals and the N:P stoichiometry of their nutrient environment, we could resolve some of the major apparent contradictions. Our analysis suggests that Acroporids behave differently to several other common genera and show distinct responses to specific nutrient treatments. We hypothesised that both the concentrations of dissolved inorganic N and P in the water and their stoichiometry shape skeletal growth and microstructure. We tested this hypothesis by exposing Acropora polystoma fragments to four nutrient treatments for > 10 weeks: high nitrate/high phosphate (HNHP), high nitrate/low phosphate (HNLP), low nitrate/high phosphate (LNHP) and low nitrate/low phosphate (LNLP). HNHP corals retained high zooxanthellae densities and their linear extension and calcification rates were up to ten times higher than in the other treatments. HNLP and LNLP corals bleached through loss of symbionts. The photochemical efficiency (Fv/Fm) of residual symbionts in HNLP corals was significantly reduced, indicating P-starvation. Micro-computed tomography (µCT) of the skeletal microstructure revealed that reduced linear extension in nutrient limited or nutrient starved conditions (HNLP, LNHP, LNLP) was associated with significant thickening of skeletal elements and reduced porosity. These changes can be explained by the strongly reduced linear extension rate in combination with a smaller reduction in the calcification rate. Studies using increased skeletal density as a proxy for past thermal bleaching events should consider that such an increase in density may also be associated with temperature-independent response to the nutrient environment. Furthermore, the taxonomy of corals and seawater N:P stoichiometry should be considered when analysing and managing the impacts of nutrient pollution. The online version contains supplementary material available at 10.1007/s00338-022-02223-0.
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影响因子：
3.5
作者：
Gladfelter, E.H.
通讯作者：
Gladfelter, E.H.
影响因子：
5.8
作者：
Furnas, M;Mitchell, A;Brodie, J
通讯作者：
Brodie, J
共生珊瑚的种群控制
影响因子：
10.1
作者：
FALKOWSKI, PG;DUBINSKY, Z;MCCLOSKEY, L
通讯作者：
MCCLOSKEY, L
影响因子：
3.7
作者：
Bright, Allan J.;Rogers, Caroline S.;Smith, Tyler B.
通讯作者：
Smith, Tyler B.
DOI：
10.1017/s0025315411001883
发表时间：
2012-06-01
影响因子：
1.2
作者：
D'angelo, Cecilia;Wiedenmann, Joerg
通讯作者：
Wiedenmann, Joerg